Fix #964 - Remove signs when multiple signs end up on a single line

ESLint --config option causes it to not detect node_modules?

.eslintrc.js

@@ -1,11 +0,0 @@
-module.exports = {
-    parserOptions: {
-        ecmaVersion: 6,
-        sourceType: "module",
-    },
-    rules: {
-        semi: 'error',
-        'space-infix-ops': 'warn',
-        radix: 'error',
-    }
-}

.gitattributes

@@ -1,4 +1,5 @@
 .* export-ignore
+/CODE_OF_CONDUCT.md export-ignore
 /CONTRIBUTING.md export-ignore
 /Dockerfile export-ignore
 /ISSUE_TEMPLATE.md export-ignore
@@ -7,4 +8,5 @@
 /README.md export-ignore
 /custom-checks export-ignore
 /img export-ignore
+/run-tests export-ignore
 /test export-ignore

.travis.yml

@@ -2,9 +2,6 @@
 sudo: required
 services:
     - docker
-branches:
-    only:
-        - master
 language: python
 script: |
-    make test
+    ./run-tests

CODE_OF_CONDUCT.md

@@ -0,0 +1,3 @@
+Codes of conduct are totally unnecessary and dumb.
+
+Just don't be a jerk and have fun.

CONTRIBUTING.md

@@ -74,10 +74,10 @@ If you want to credit multiple authors, you can comma separate them.
 ### 3.i. Adding a New Linter
 
 If you add a new linter, look for existing handlers first in the
-[handlers.vim](autoload/ale/handlers.vim) file. One of the handlers there may
+[handlers](autoload/ale/handlers) directory. One of the handlers there may
 already be able to handle your lines of output. If you find that your new
 linter replicates an existing error handler, consider pulling it up into the
-[handlers.vim](autoload/ale/handlers.vim) file, and use the generic handler in
+[handlers](autoload/ale/handlers) directory, and use the generic handler in
 both places.
 
 When you add a linter, make sure the language for the linter and the linter

Dockerfile

@@ -1,25 +1,18 @@
 FROM tweekmonster/vim-testbed:latest
 
-RUN install_vim -tag v8.0.0000 -build \
-                -tag v8.0.0027 -build
+RUN install_vim -tag v8.0.0027 -build \
+                -tag neovim:v0.1.7 -build
 
-# the clang package includes clang-tidy
 ENV PACKAGES="\
     bash \
     git \
     python \
     py-pip \
-    nodejs \
-    gcc \
-    g++ \
-    clang \
 "
 RUN apk --update add $PACKAGES && \
     rm -rf /var/cache/apk/* /tmp/* /var/tmp/*
 
 RUN pip install vim-vint==0.3.9
 
-RUN npm install -g eslint@3.7.1
-
 RUN git clone https://github.com/junegunn/vader.vim vader && \
     cd vader && git checkout c6243dd81c98350df4dec608fa972df98fa2a3af

ISSUE_TEMPLATE.md

@@ -4,9 +4,5 @@ here. If that doesn't work for some reason, try running :ALEInfo and copying
 the output from that here instead. If everything is broken, run around in
 circles and scream.
 
-If you are experiencing a bug where ALE is not correctly parsing the output of
-commands, set g:ale_history_log_output to 1, and run ALE again, and then
-:ALEInfo should include the full output of each command which ran.
-
 Whatever the case, describe the your issue here.
 -->

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2016, w0rp <devw0rp@gmail.com>
+Copyright (c) 2016-2017, w0rp <devw0rp@gmail.com>
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

Makefile

@@ -1,53 +0,0 @@
-SHELL := /usr/bin/env bash
-IMAGE ?= w0rp/ale
-CURRENT_IMAGE_ID = 30a9967dbdb1
-DOCKER_FLAGS = --rm -v $(PWD):/testplugin -v $(PWD)/test:/home "$(IMAGE)"
-tests = test/*.vader test/*/*.vader test/*/*/*.vader test/*/*/*/*.vader
-
-test-setup:
-	docker images -q w0rp/ale | grep ^$(CURRENT_IMAGE_ID) > /dev/null || \
-		docker pull $(IMAGE)
-
-vader: test-setup
-	@:; \
-	vims=$$(docker run --rm $(IMAGE) ls /vim-build/bin | grep -E '^n?vim'); \
-	if [ -z "$$vims" ]; then echo "No Vims found!"; exit 1; fi; \
-	for vim in $$vims; do \
-		docker run -a stderr $(DOCKER_FLAGS) $$vim '+Vader! $(tests)'; \
-	done
-
-test: test-setup
-	@:; \
-	vims=$$(docker run --rm $(IMAGE) ls /vim-build/bin | grep -E '^n?vim'); \
-	if [ -z "$$vims" ]; then echo "No Vims found!"; exit 1; fi; \
-	EXIT=0; \
-	for vim in $$vims; do \
-		echo; \
-		echo '========================================'; \
-		echo "Running tests for $$vim"; \
-		echo '========================================'; \
-		echo; \
-		docker run -a stderr $(DOCKER_FLAGS) $$vim '+Vader! $(tests)' || EXIT=$$?; \
-	done; \
-	echo; \
-	echo '========================================'; \
-	echo 'Running Vint to lint our code'; \
-	echo '========================================'; \
-	echo 'Vint warnings/errors follow:'; \
-	echo; \
-	set -o pipefail; \
-	docker run -a stdout $(DOCKER_FLAGS) vint -s /testplugin | sed s:^/testplugin/:: || EXIT=$$?; \
-	set +o pipefail; \
-	echo; \
-	echo '========================================'; \
-	echo 'Running custom checks'; \
-	echo '========================================'; \
-	echo 'Custom warnings/errors follow:'; \
-	echo; \
-	set -o pipefail; \
-	docker run -v $(PWD):/testplugin "$(IMAGE)" /testplugin/custom-checks /testplugin | sed s:^/testplugin/:: || EXIT=$$?; \
-	set +o pipefail; \
-	echo; \
-	exit $$EXIT;
-
-.DEFAULT_GOAL := test

PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,10 @@
 <!--
-When creating new pull requests, please consider the following.
+READ THIS: Before creating a pull request, please consider the following first.
 
+* The most important thing you can do is write tests. Code without tests
+  probably doesn't work, and will almost certainly stop working later on. Pull
+  requests without tests probably won't be accepted, although there are some
+  exceptions.
 * Read the Contributing guide linked above first.
 * If you are adding a new linter, remember to update the README.md file and
   doc/ale.txt first.

README.md

@@ -15,14 +15,21 @@ back to a filesystem.
 
 In other words, this plugin allows you to lint while you type.
 
+In addition to linting support, ALE offers some support for fixing code with
+formatting tools, and completion via Language Server Protocol servers, or
+servers with similar enough protocols, like `tsserver`.
+
 ## Table of Contents
 
 1. [Supported Languages and Tools](#supported-languages)
 2. [Usage](#usage)
+    1. [Linting](#usage-linting)
+    2. [Fixing](#usage-fixing)
+    3. [Completion](#usage-completion)
 3. [Installation](#installation)
-    1. [Installation with Pathogen](#installation-with-pathogen)
-    2. [Installation with Vundle](#installation-with-vundle)
-    3. [Manual Installation](#manual-installation)
+    1. [Installation with Vim package management](#standard-installation)
+    2. [Installation with Pathogen](#installation-with-pathogen)
+    3. [Installation with Vundle](#installation-with-vundle)
 4. [Contributing](#contributing)
 5. [FAQ](#faq)
     1. [How do I disable particular linters?](#faq-disable-linters)
@@ -55,10 +62,11 @@ name. That seems to be the fairest way to arrange this table.
 | ASM | [gcc](https://gcc.gnu.org) |
 | Ansible | [ansible-lint](https://github.com/willthames/ansible-lint) |
 | AsciiDoc | [proselint](http://proselint.com/)|
+| Awk | [gawk](https://www.gnu.org/software/gawk/)|
 | Bash | [-n flag](https://www.gnu.org/software/bash/manual/bash.html#index-set), [shellcheck](https://www.shellcheck.net/) |
 | Bourne Shell | [-n flag](http://linux.die.net/man/1/sh), [shellcheck](https://www.shellcheck.net/) |
-| C | [cppcheck](http://cppcheck.sourceforge.net), [gcc](https://gcc.gnu.org/), [clang](http://clang.llvm.org/)|
-| C++ (filetype cpp) | [clang](http://clang.llvm.org/), [clangtidy](http://clang.llvm.org/extra/clang-tidy/), [cppcheck](http://cppcheck.sourceforge.net), [gcc](https://gcc.gnu.org/)|
+| C | [cppcheck](http://cppcheck.sourceforge.net), [gcc](https://gcc.gnu.org/), [clang](http://clang.llvm.org/), [clang-format](https://clang.llvm.org/docs/ClangFormat.html)|
+| C++ (filetype cpp) | [clang](http://clang.llvm.org/), [clangcheck](http://clang.llvm.org/docs/ClangCheck.html), [clangtidy](http://clang.llvm.org/extra/clang-tidy/), [cppcheck](http://cppcheck.sourceforge.net), [cpplint](https://github.com/google/styleguide/tree/gh-pages/cpplint), [gcc](https://gcc.gnu.org/), [clang-format](https://clang.llvm.org/docs/ClangFormat.html)|
 | C# | [mcs](http://www.mono-project.com/docs/about-mono/languages/csharp/) |
 | Chef | [foodcritic](http://www.foodcritic.io/) |
 | CMake | [cmakelint](https://github.com/richq/cmake-lint) |
@@ -67,21 +75,25 @@ name. That seems to be the fairest way to arrange this table.
 | CSS | [csslint](http://csslint.net/), [stylelint](https://github.com/stylelint/stylelint) |
 | Cython (pyrex filetype) | [cython](http://cython.org/) |
 | D | [dmd](https://dlang.org/dmd-linux.html) |
+| Dart | [dartanalyzer](https://github.com/dart-lang/sdk/tree/master/pkg/analyzer_cli) |
 | Dockerfile | [hadolint](https://github.com/lukasmartinelli/hadolint) |
 | Elixir | [credo](https://github.com/rrrene/credo), [dogma](https://github.com/lpil/dogma) |
 | Elm | [elm-make](https://github.com/elm-lang/elm-make) |
-| Erb | [erb](https://github.com/jeremyevans/erubi) |
-| Erlang | [erlc](http://erlang.org/doc/man/erlc.html) |
+| Erb | [erb](https://github.com/jeremyevans/erubi), [erubis](https://github.com/kwatch/erubis) |
+| Erlang | [erlc](http://erlang.org/doc/man/erlc.html), [SyntaxErl](https://github.com/ten0s/syntaxerl) |
 | Fortran | [gcc](https://gcc.gnu.org/) |
+| FusionScript | [fusion-lint](https://github.com/RyanSquared/fusionscript) |
 | Go | [gofmt -e](https://golang.org/cmd/gofmt/), [go vet](https://golang.org/cmd/vet/), [golint](https://godoc.org/github.com/golang/lint), [gometalinter](https://github.com/alecthomas/gometalinter), [go build](https://golang.org/cmd/go/), [gosimple](https://github.com/dominikh/go-tools/tree/master/cmd/gosimple), [staticcheck](https://github.com/dominikh/go-tools/tree/master/cmd/staticcheck) |
+| GraphQL | [gqlint](https://github.com/happylinks/gqlint) |
 | Haml | [haml-lint](https://github.com/brigade/haml-lint)
 | Handlebars | [ember-template-lint](https://github.com/rwjblue/ember-template-lint) |
-| Haskell | [ghc](https://www.haskell.org/ghc/), [hlint](https://hackage.haskell.org/package/hlint), [hdevtools](https://hackage.haskell.org/package/hdevtools) |
+| Haskell | [ghc](https://www.haskell.org/ghc/), [stack-ghc](https://haskellstack.org/), [stack-build](https://haskellstack.org/), [ghc-mod](https://github.com/DanielG/ghc-mod), [stack-ghc-mod](https://github.com/DanielG/ghc-mod), [hlint](https://hackage.haskell.org/package/hlint), [hdevtools](https://hackage.haskell.org/package/hdevtools) |
 | HTML | [HTMLHint](http://htmlhint.com/), [proselint](http://proselint.com/), [tidy](http://www.html-tidy.org/) |
-| Java | [javac](http://www.oracle.com/technetwork/java/javase/downloads/index.html) |
-| JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/), [flow](https://flowtype.org/), [standard](http://standardjs.com/), [xo](https://github.com/sindresorhus/xo)
+| Idris | [idris](http://www.idris-lang.org/) |
+| Java | [checkstyle](http://checkstyle.sourceforge.net), [javac](http://www.oracle.com/technetwork/java/javase/downloads/index.html) |
+| JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/), [flow](https://flowtype.org/), [standard](http://standardjs.com/), [prettier](https://github.com/prettier/prettier) (and `prettier-eslint`, `prettier-standard`), [xo](https://github.com/sindresorhus/xo)
 | JSON | [jsonlint](http://zaa.ch/jsonlint/) |
-| Kotlin | [kotlinc](https://kotlinlang.org) see `:help ale-integration-kotlin` for configuration instructions
+| Kotlin | [kotlinc](https://kotlinlang.org), [ktlint](https://ktlint.github.io) see `:help ale-integration-kotlin` for configuration instructions
 | LaTeX | [chktex](http://www.nongnu.org/chktex/), [lacheck](https://www.ctan.org/pkg/lacheck), [proselint](http://proselint.com/) |
 | Lua | [luacheck](https://github.com/mpeterv/luacheck) |
 | Markdown | [mdl](https://github.com/mivok/markdownlint), [proselint](http://proselint.com/), [vale](https://github.com/ValeLint/vale) |
@@ -89,33 +101,39 @@ name. That seems to be the fairest way to arrange this table.
 | Nim | [nim](https://nim-lang.org/docs/nimc.html) |
 | nix | [nix-instantiate](http://nixos.org/nix/manual/#sec-nix-instantiate) |
 | nroff | [proselint](http://proselint.com/)|
+| Objective-C | [clang](http://clang.llvm.org/) |
+| Objective-C++ | [clang](http://clang.llvm.org/) |
 | OCaml | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-integration-ocaml-merlin` for configuration instructions
 | Perl | [perl -c](https://perl.org/), [perl-critic](https://metacpan.org/pod/Perl::Critic) |
-| PHP | [hack](http://hacklang.org/), [php -l](https://secure.php.net/), [phpcs](https://github.com/squizlabs/PHP_CodeSniffer), [phpmd](https://phpmd.org) |
+| PHP | [hack](http://hacklang.org/), [langserver](https://github.com/felixfbecker/php-language-server), [php -l](https://secure.php.net/), [phpcs](https://github.com/squizlabs/PHP_CodeSniffer), [phpmd](https://phpmd.org), [phpstan](https://github.com/phpstan/phpstan), [phpcbf](https://github.com/squizlabs/PHP_CodeSniffer) |
 | Pod | [proselint](http://proselint.com/)|
 | Pug | [pug-lint](https://github.com/pugjs/pug-lint) |
 | Puppet | [puppet](https://puppet.com), [puppet-lint](https://puppet-lint.com) |
-| Python | [flake8](http://flake8.pycqa.org/en/latest/), [mypy](http://mypy-lang.org/), [pylint](https://www.pylint.org/) |
+| Python | [autopep8](https://github.com/hhatto/autopep8), [flake8](http://flake8.pycqa.org/en/latest/), [isort](https://github.com/timothycrosley/isort), [mypy](http://mypy-lang.org/), [pycodestyle](https://github.com/PyCQA/pycodestyle), [pylint](https://www.pylint.org/), [yapf](https://github.com/google/yapf) |
+| R | [lintr](https://github.com/jimhester/lintr) |
 | ReasonML | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-integration-reason-merlin` for configuration instructions
 | reStructuredText | [proselint](http://proselint.com/)|
 | RPM spec | [rpmlint](https://github.com/rpm-software-management/rpmlint) (disabled by default; see `:help ale-integration-spec`) |
-| Ruby | [brakeman](http://brakemanscanner.org/), [reek](https://github.com/troessner/reek), [rubocop](https://github.com/bbatsov/rubocop), [ruby](https://www.ruby-lang.org) |
-| Rust | [rustc](https://www.rust-lang.org/), cargo (see `:help ale-integration-rust` for configuration instructions) |
+| Ruby | [brakeman](http://brakemanscanner.org/), [rails_best_practices](https://github.com/flyerhzm/rails_best_practices), [reek](https://github.com/troessner/reek), [rubocop](https://github.com/bbatsov/rubocop), [ruby](https://www.ruby-lang.org) |
+| Rust |  cargo (see `:help ale-integration-rust` for configuration instructions), [rls](https://github.com/rust-lang-nursery/rls), [rustc](https://www.rust-lang.org/) |
 | SASS | [sass-lint](https://www.npmjs.com/package/sass-lint), [stylelint](https://github.com/stylelint/stylelint) |
 | SCSS | [sass-lint](https://www.npmjs.com/package/sass-lint), [scss-lint](https://github.com/brigade/scss-lint), [stylelint](https://github.com/stylelint/stylelint) |
-| Scala | [scalac](http://scala-lang.org) |
+| Scala | [scalac](http://scala-lang.org), [scalastyle](http://www.scalastyle.org) |
 | Slim | [slim-lint](https://github.com/sds/slim-lint)
 | SML | [smlnj](http://www.smlnj.org/) |
+| Stylus | [stylelint](https://github.com/stylelint/stylelint) |
 | SQL | [sqlint](https://github.com/purcell/sqlint) |
-| Swift | [swiftlint](https://swift.org/) |
+| Swift | [swiftlint](https://github.com/realm/SwiftLint), [swiftformat](https://github.com/nicklockwood/SwiftFormat) |
+| Tcl | [nagelfar](http://nagelfar.sourceforge.net)|
 | Texinfo | [proselint](http://proselint.com/)|
 | Text^ | [proselint](http://proselint.com/), [vale](https://github.com/ValeLint/vale) |
-| TypeScript | [tslint](https://github.com/palantir/tslint), typecheck |
+| TypeScript | [eslint](http://eslint.org/), [tslint](https://github.com/palantir/tslint), tsserver, typecheck |
 | Verilog | [iverilog](https://github.com/steveicarus/iverilog), [verilator](http://www.veripool.org/projects/verilator/wiki/Intro) |
 | Vim | [vint](https://github.com/Kuniwak/vint) |
 | Vim help^ | [proselint](http://proselint.com/)|
 | XHTML | [proselint](http://proselint.com/)|
-| YAML | [yamllint](https://yamllint.readthedocs.io/) |
+| XML | [xmllint](http://xmlsoft.org/xmllint.html/)|
+| YAML | [swaglint](https://github.com/byCedric/swaglint), [yamllint](https://yamllint.readthedocs.io/) |
 
 * *^ No linters for text or Vim help filetypes are enabled by default.*
 
@@ -123,6 +141,10 @@ name. That seems to be the fairest way to arrange this table.
 
 ## 2. Usage
 
+<a name="usage-linting"></a>
+
+### 2.i Linting
+
 Once this plugin is installed, while editing your files in supported
 languages and tools which have been correctly installed,
 this plugin will send the contents of your text buffers to a variety of
@@ -135,19 +157,106 @@ documented in [the Vim help file](doc/ale.txt). For more information on the
 options ALE offers, consult `:help ale-options` for global options and `:help
 ale-linter-options` for options specified to particular linters.
 
+<a name="usage-fixing"></a>
+
+### 2.ii Fixing
+
+ALE can fix files with the `ALEFix` command. Functions need to be configured
+for different filetypes with the `g:ale_fixers` variable. For example, the
+following code can be used to fix JavaScript code with ESLint:
+
+```vim
+" Put this in vimrc or a plugin file of your own.
+" After this is configured, :ALEFix will try and fix your JS code with ESLint.
+let g:ale_fixers = {
+\   'javascript': ['eslint'],
+\}
+
+" Set this setting in vimrc if you want to fix files automatically on save.
+" This is off by default.
+let g:ale_fix_on_save = 1
+```
+
+The `:ALEFixSuggest` command will suggest some supported tools for fixing code,
+but fixers can be also implemented with functions, including lambda functions
+too. See `:help ale-fix` for detailed information.
+
+<a name="usage-completion"></a>
+
+### 2.iii Completion
+
+ALE offers some support for completion via hijacking of omnicompletion while you
+type. All of ALE's completion information must come from Language Server
+Protocol linters, or similar protocols. At the moment, completion is only
+supported for TypeScript code with `tsserver`, when `tsserver` is enabled. You
+can enable completion like so:
+
+```vim
+" Enable completion where available.
+let g:ale_completion_enabled = 1
+```
+
+See `:help ale-completion` for more information.
+
 <a name="installation"></a>
 
 ## 3. Installation
 
 To install this plugin, you should use one of the following methods.
 For Windows users, replace usage of the Unix `~/.vim` directory with
-`%USERPROFILE%\_vim`, or another directory if you have configured
+`%USERPROFILE%\vimfiles`, or another directory if you have configured
 Vim differently. On Windows, your `~/.vimrc` file will be similarly
 stored in `%USERPROFILE%\_vimrc`.
 
+<a name="standard-installation"></a>
+
+### 3.i. Installation with Vim package management
+
+In Vim 8 and NeoVim, you can install plugins easily without needing to use
+any other tools. Simply clone the plugin into your `pack` directory.
+
+#### Vim 8 on Unix
+
+```bash
+mkdir -p ~/.vim/pack/git-plugins/start
+git clone https://github.com/w0rp/ale.git ~/.vim/pack/git-plugins/start/ale
+```
+
+#### NeoVim on Unix
+
+```bash
+mkdir -p ~/.local/share/nvim/site/pack/git-plugins/start
+git clone https://github.com/w0rp/ale.git ~/.local/share/nvim/site/pack/git-plugins/start/ale
+```
+
+#### Vim 8 on Windows
+
+```bash
+# Run these commands in the "Git for Windows" Bash terminal
+mkdir -p ~/vimfiles/pack/git-plugins/start
+git clone https://github.com/w0rp/ale.git ~/vimfiles/pack/git-plugins/start/ale
+```
+
+#### Generating Vim help files
+
+You can add the following line to your vimrc files to generate documentation
+tags automatically, if you don't have something similar already, so you can use
+the `:help` command to consult ALE's online documentation:
+
+```vim
+" Put these lines at the very end of your vimrc file.
+
+" Load all plugins now.
+" Plugins need to be added to runtimepath before helptags can be generated.
+packloadall
+" Load all of the helptags now, after plugins have been loaded.
+" All messages and errors will be ignored.
+silent! helptags ALL
+```
+
 <a name="installation-with-pathogen"></a>
 
-### 3.i. Installation with Pathogen
+### 3.ii. Installation with Pathogen
 
 To install this module with [Pathogen](https://github.com/tpope/vim-pathogen),
 you should clone this repository to your bundle directory, and ensure
@@ -161,7 +270,7 @@ git clone https://github.com/w0rp/ale.git
 
 <a name="installation-with-vundle"></a>
 
-### 3.ii. Installation with Vundle
+### 3.iii. Installation with Vundle
 
 You can install this plugin using [Vundle](https://github.com/VundleVim/Vundle.vim)
 by using the path on GitHub for this repository.
@@ -172,41 +281,6 @@ Plugin 'w0rp/ale'
 
 See the Vundle documentation for more information.
 
-<a name="manual-installation"></a>
-
-### 3.iii. Manual Installation
-
-For installation without a package manager, you can clone this git repository
-into a bundle directory as with pathogen, and add the repository to your
-runtime path yourself. First clone the repository.
-
-```bash
-cd ~/.vim/bundle
-git clone https://github.com/w0rp/ale.git
-```
-
-Then, modify your `~/.vimrc` file to add this plugin to your runtime path.
-
-```vim
-set nocompatible
-filetype off
-
-let &runtimepath.=',~/.vim/bundle/ale'
-
-filetype plugin on
-```
-
-You can add the following line to generate documentation tags automatically,
-if you don't have something similar already, so you can use the `:help` command
-to consult ALE's online documentation:
-
-```vim
-silent! helptags ALL
-```
-
-Because the author of this plugin is a weird nerd, this is his preferred
-installation method.
-
 <a name="contributing"></a>
 
 ## 4. Contributing
@@ -287,28 +361,41 @@ highlight clear ALEWarningSign
 
 ### 5.iv. How can I show errors or warnings in my statusline?
 
-You can use `ALEGetStatusLine()` to integrate ALE into vim statusline.
-To enable it, you should have in your `statusline` settings
+[vim-airline](https://github.com/vim-airline/vim-airline) integrates with ALE
+for displaying error information in the status bar. If you want to see the
+status for ALE in a nice format, it is recommended to use vim-airline with ALE.
+The airline extension can be enabled by adding the following to your vimrc:
 
 ```vim
-%{ALEGetStatusLine()}
+" Set this. Airline will handle the rest.
+let g:airline#extensions#ale#enabled = 1
 ```
 
-When errors are detected a string showing the number of errors will be shown.
-You can customize the output format using the global list `g:ale_statusline_format` where:
+If you don't want to use vim-airline, you can implement your own statusline
+function without adding any other plugins. ALE provides a function for counting
+the number of problems for this purpose, named `ale#statusline#Count`.
 
-- The 1st element is for errors
-- The 2nd element is for warnings
-- The 3rd element is for when no errors are detected
-
-e.g
+Say you want to display all errors as one figure, and all non-errors as another
+figure. You can do the following:
 
 ```vim
-let g:ale_statusline_format = ['⨉ %d', '⚠ %d', '⬥ ok']
+function! LinterStatus() abort
+    let l:counts = ale#statusline#Count(bufnr(''))
+
+    let l:all_errors = l:counts.error + l:counts.style_error
+    let l:all_non_errors = l:counts.total - l:all_errors
+
+    return l:counts.total == 0 ? 'OK' : printf(
+    \   '%dW %dE',
+    \   all_non_errors,
+    \   all_errors
+    \)
+endfunction
+
+set statusline=%{LinterStatus()}
 ```
 
-![Statusline with issues](img/issues.png)
-![Statusline with no issues](img/no_issues.png)
+See `:help ale#statusline#Count()` for more information.
 
 <a name="faq-echo-format"></a>
 
@@ -421,7 +508,7 @@ If you configure ALE options correctly in your vimrc file, and install
 the right tools, you can check JSX files with stylelint and eslint.
 
 First, install eslint and install stylelint with
-[https://github.com/styled-components/stylelint-processor-styled-components](stylelint-processor-styled-components).
+[stylelint-processor-styled-components](https://github.com/styled-components/stylelint-processor-styled-components).
 
 Supposing you have installed both tools correctly, configure your .jsx files so
 `jsx` is included in the filetype. You can use an `autocmd` for this.
@@ -469,4 +556,4 @@ still be an advantage.
 
 If you are still concerned, you can turn the automatic linting off altogether,
 including the option `g:ale_lint_on_enter`, and you can run ALE manually with
-`:call ale#Lint()`.
+`:ALELint`.

ale_linters/ansible/ansible-lint.vim

@@ -1,9 +0,0 @@
-" Author: Bjorn Neergaard <bjorn@neersighted.com>
-" Description: ansible-lint for ansible-yaml files
-
-call ale#linter#Define('ansible', {
-\   'name': 'ansible',
-\   'executable': 'ansible',
-\   'command': 'ansible-lint -p %t',
-\   'callback': 'ale#handlers#python#HandlePEP8Format',
-\})

ale_linters/ansible/ansible_lint.vim

@@ -0,0 +1,48 @@
+" Author: Bjorn Neergaard <bjorn@neersighted.com>
+" Description: ansible-lint for ansible-yaml files
+
+function! ale_linters#ansible#ansible_lint#Handle(buffer, lines) abort
+    for l:line in a:lines[:10]
+        if match(l:line, '^Traceback') >= 0
+            return [{
+            \   'lnum': 1,
+            \   'text': 'An exception was thrown. See :ALEDetail',
+            \   'detail': join(a:lines, "\n"),
+            \}]
+        endif
+    endfor
+
+    " Matches patterns line the following:
+    "
+    " test.yml:35: [EANSIBLE0002] Trailing whitespace
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):?(\d+)?: \[?([[:alnum:]]+)\]? (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:code = l:match[4]
+
+        if l:code is# 'EANSIBLE002'
+        \&& !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
+            " Skip warnings for trailing whitespace if the option is off.
+            continue
+        endif
+
+        if ale#path#IsBufferPath(a:buffer, l:match[1])
+            call add(l:output, {
+            \   'lnum': l:match[2] + 0,
+            \   'col': l:match[3] + 0,
+            \   'text': l:code . ': ' . l:match[5],
+            \   'type': l:code[:0] is# 'E' ? 'E' : 'W',
+            \})
+        endif
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('ansible', {
+\   'name': 'ansible',
+\   'executable': 'ansible',
+\   'command': 'ansible-lint -p %t',
+\   'callback': 'ale_linters#ansible#ansible_lint#Handle',
+\})

ale_linters/asm/gcc.vim

@@ -5,7 +5,7 @@ let g:ale_asm_gcc_options = get(g:, 'ale_asm_gcc_options', '-Wall')
 
 function! ale_linters#asm#gcc#GetCommand(buffer) abort
     return 'gcc -x assembler -fsyntax-only '
-    \    . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \    . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
     \    . ' ' . ale#Var(a:buffer, 'asm_gcc_options') . ' -'
 endfunction
 

ale_linters/awk/gawk.vim

@@ -0,0 +1,26 @@
+" Author: kmarc <korondi.mark@gmail.com>
+" Description: This file adds support for using GNU awk with sripts.
+
+let g:ale_awk_gawk_executable =
+\   get(g:, 'ale_awk_gawk_executable', 'gawk')
+
+let g:ale_awk_gawk_options =
+\   get(g:, 'ale_awk_gawk_options', '')
+
+function! ale_linters#awk#gawk#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'awk_gawk_executable')
+endfunction
+
+function! ale_linters#awk#gawk#GetCommand(buffer) abort
+    return ale_linters#awk#gawk#GetExecutable(a:buffer)
+    \   . ' ' . ale#Var(a:buffer, 'awk_gawk_options')
+    \   . ' ' . '-f %t --lint /dev/null'
+endfunction
+
+call ale#linter#Define('awk', {
+\   'name': 'gawk',
+\   'executable_callback': 'ale_linters#awk#gawk#GetExecutable',
+\   'command_callback': 'ale_linters#awk#gawk#GetCommand',
+\   'callback': 'ale#handlers#cpplint#HandleCppLintFormat',
+\   'output_stream': 'both'
+\})

ale_linters/c/clang.vim

@@ -1,26 +1,29 @@
 " Author: Masahiro H https://github.com/mshr-h
 " Description: clang linter for c files
 
-" Set this option to change the Clang options for warnings for C.
-if !exists('g:ale_c_clang_options')
-    " let g:ale_c_clang_options = '-Wall'
-    " let g:ale_c_clang_options = '-std=c99 -Wall'
-    " c11 compatible
-    let g:ale_c_clang_options = '-std=c11 -Wall'
-endif
+call ale#Set('c_clang_executable', 'clang')
+call ale#Set('c_clang_options', '-std=c11 -Wall')
+
+function! ale_linters#c#clang#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'c_clang_executable')
+endfunction
 
 function! ale_linters#c#clang#GetCommand(buffer) abort
+    let l:paths = ale#c#FindLocalHeaderPaths(a:buffer)
+
     " -iquote with the directory the file is in makes #include work for
     "  headers in the same directory.
-    return 'clang -S -x c -fsyntax-only '
-    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-    \   . ' ' . ale#Var(a:buffer, 'c_clang_options') . ' -'
+    return ale#Escape(ale_linters#c#clang#GetExecutable(a:buffer))
+    \   . ' -S -x c -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h')) . ' '
+    \   . ale#c#IncludeOptions(l:paths)
+    \   . ale#Var(a:buffer, 'c_clang_options') . ' -'
 endfunction
 
 call ale#linter#Define('c', {
 \   'name': 'clang',
 \   'output_stream': 'stderr',
-\   'executable': 'clang',
+\   'executable_callback': 'ale_linters#c#clang#GetExecutable',
 \   'command_callback': 'ale_linters#c#clang#GetCommand',
 \   'callback': 'ale#handlers#gcc#HandleGCCFormat',
 \})

ale_linters/c/cppcheck.vim

@@ -1,8 +1,12 @@
 " Author: Bart Libert <bart.libert@gmail.com>
 " Description: cppcheck linter for c files
 
-" Set this option to change the cppcheck options
-let g:ale_c_cppcheck_options = get(g:, 'ale_c_cppcheck_options', '--enable=style')
+call ale#Set('c_cppcheck_executable', 'cppcheck')
+call ale#Set('c_cppcheck_options', '--enable=style')
+
+function! ale_linters#c#cppcheck#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'c_cppcheck_executable')
+endfunction
 
 function! ale_linters#c#cppcheck#GetCommand(buffer) abort
     " Search upwards from the file for compile_commands.json.
@@ -19,7 +23,8 @@ function! ale_linters#c#cppcheck#GetCommand(buffer) abort
     \   : ''
 
     return l:cd_command
-    \   . 'cppcheck -q --language=c '
+    \   . ale#Escape(ale_linters#c#cppcheck#GetExecutable(a:buffer))
+    \   . ' -q --language=c '
     \   . l:compile_commands_option
     \   . ale#Var(a:buffer, 'c_cppcheck_options')
     \   . ' %t'
@@ -28,7 +33,7 @@ endfunction
 call ale#linter#Define('c', {
 \   'name': 'cppcheck',
 \   'output_stream': 'both',
-\   'executable': 'cppcheck',
+\   'executable_callback': 'ale_linters#c#cppcheck#GetExecutable',
 \   'command_callback': 'ale_linters#c#cppcheck#GetCommand',
 \   'callback': 'ale#handlers#cppcheck#HandleCppCheckFormat',
 \})

ale_linters/c/gcc.vim

@@ -1,26 +1,29 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: gcc linter for c files
 
-" Set this option to change the GCC options for warnings for C.
-if !exists('g:ale_c_gcc_options')
-    " let g:ale_c_gcc_options = '-Wall'
-    " let g:ale_c_gcc_options = '-std=c99 -Wall'
-    " c11 compatible
-    let g:ale_c_gcc_options = '-std=c11 -Wall'
-endif
+call ale#Set('c_gcc_executable', 'gcc')
+call ale#Set('c_gcc_options', '-std=c11 -Wall')
+
+function! ale_linters#c#gcc#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'c_gcc_executable')
+endfunction
 
 function! ale_linters#c#gcc#GetCommand(buffer) abort
+    let l:paths = ale#c#FindLocalHeaderPaths(a:buffer)
+
     " -iquote with the directory the file is in makes #include work for
     "  headers in the same directory.
-    return 'gcc -S -x c -fsyntax-only '
-    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-    \   . ' ' . ale#Var(a:buffer, 'c_gcc_options') . ' -'
+    return ale#Escape(ale_linters#c#gcc#GetExecutable(a:buffer))
+    \   . ' -S -x c -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h')) . ' '
+    \   . ale#c#IncludeOptions(l:paths)
+    \   . ale#Var(a:buffer, 'c_gcc_options') . ' -'
 endfunction
 
 call ale#linter#Define('c', {
 \   'name': 'gcc',
 \   'output_stream': 'stderr',
-\   'executable': 'gcc',
+\   'executable_callback': 'ale_linters#c#gcc#GetExecutable',
 \   'command_callback': 'ale_linters#c#gcc#GetCommand',
 \   'callback': 'ale#handlers#gcc#HandleGCCFormat',
 \})

ale_linters/coffee/coffeelint.vim

@@ -27,7 +27,7 @@ function! ale_linters#coffee#coffeelint#Handle(buffer, lines) abort
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         call add(l:output, {
         \   'lnum': str2nr(l:match[1]),
-        \   'type': l:match[3] ==# 'error' ? 'E' : 'W',
+        \   'type': l:match[3] is# 'error' ? 'E' : 'W',
         \   'text': l:match[4],
         \})
     endfor

ale_linters/cpp/clang.vim

@@ -1,23 +1,29 @@
 " Author: Tomota Nakamura <https://github.com/tomotanakamura>
 " Description: clang linter for cpp files
 
-" Set this option to change the Clang options for warnings for CPP.
-if !exists('g:ale_cpp_clang_options')
-    let g:ale_cpp_clang_options = '-std=c++14 -Wall'
-endif
+call ale#Set('cpp_clang_executable', 'clang++')
+call ale#Set('cpp_clang_options', '-std=c++14 -Wall')
+
+function! ale_linters#cpp#clang#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_clang_executable')
+endfunction
 
 function! ale_linters#cpp#clang#GetCommand(buffer) abort
+    let l:paths = ale#c#FindLocalHeaderPaths(a:buffer)
+
     " -iquote with the directory the file is in makes #include work for
     "  headers in the same directory.
-    return 'clang++ -S -x c++ -fsyntax-only '
-    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-    \   . ' ' . ale#Var(a:buffer, 'cpp_clang_options') . ' -'
+    return ale#Escape(ale_linters#cpp#clang#GetExecutable(a:buffer))
+    \   . ' -S -x c++ -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h')) . ' '
+    \   . ale#c#IncludeOptions(l:paths)
+    \   . ale#Var(a:buffer, 'cpp_clang_options') . ' -'
 endfunction
 
 call ale#linter#Define('cpp', {
 \   'name': 'clang',
 \   'output_stream': 'stderr',
-\   'executable': 'clang++',
+\   'executable_callback': 'ale_linters#cpp#clang#GetExecutable',
 \   'command_callback': 'ale_linters#cpp#clang#GetCommand',
 \   'callback': 'ale#handlers#gcc#HandleGCCFormat',
 \})

ale_linters/cpp/clangcheck.vim

@@ -0,0 +1,39 @@
+" Author: gagbo <gagbobada@gmail.com>
+" Description: clang-check linter for cpp files
+
+call ale#Set('cpp_clangcheck_executable', 'clang-check')
+call ale#Set('cpp_clangcheck_options', '')
+call ale#Set('c_build_dir', '')
+
+function! ale_linters#cpp#clangcheck#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_clangcheck_executable')
+endfunction
+
+function! ale_linters#cpp#clangcheck#GetCommand(buffer) abort
+    let l:user_options = ale#Var(a:buffer, 'cpp_clangcheck_options')
+
+    " Try to find compilation database to link automatically
+    let l:build_dir = ale#Var(a:buffer, 'c_build_dir')
+
+    if empty(l:build_dir)
+        let l:build_dir = ale#c#FindCompileCommands(a:buffer)
+    endif
+
+    " The extra arguments in the command are used to prevent .plist files from
+    " being generated. These are only added if no build directory can be
+    " detected.
+    return ale#Escape(ale_linters#cpp#clangcheck#GetExecutable(a:buffer))
+    \   . ' -analyze %s'
+    \   . (!empty(l:user_options) ? ' ' . l:user_options : '')
+    \   . (!empty(l:build_dir) ? ' -p ' . ale#Escape(l:build_dir) : '')
+    \   . (empty(l:build_dir) ? ' -extra-arg -Xanalyzer -extra-arg -analyzer-output=text' : '')
+endfunction
+
+call ale#linter#Define('cpp', {
+\   'name': 'clangcheck',
+\   'output_stream': 'stderr',
+\   'executable_callback': 'ale_linters#cpp#clangcheck#GetExecutable',
+\   'command_callback': 'ale_linters#cpp#clangcheck#GetCommand',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\   'lint_file': 1,
+\})

ale_linters/cpp/clangtidy.vim

@@ -1,30 +1,57 @@
-" Author: vdeurzen <tim@kompiler.org>, w0rp <devw0rp@gmail.com>
+" Author: vdeurzen <tim@kompiler.org>, w0rp <devw0rp@gmail.com>,
+" gagbo <gagbobada@gmail.com>
 " Description: clang-tidy linter for cpp files
 
+call ale#Set('cpp_clangtidy_executable', 'clang-tidy')
 " Set this option to check the checks clang-tidy will apply.
-let g:ale_cpp_clangtidy_checks = get(g:, 'ale_cpp_clangtidy_checks', ['*'])
-
+call ale#Set('cpp_clangtidy_checks', ['*'])
 " Set this option to manually set some options for clang-tidy.
 " This will disable compile_commands.json detection.
-let g:ale_cpp_clangtidy_options = get(g:, 'ale_cpp_clangtidy_options', '')
+call ale#Set('cpp_clangtidy_options', '')
+call ale#Set('c_build_dir', '')
+
+function! ale_linters#cpp#clangtidy#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_clangtidy_executable')
+endfunction
+
+function! s:GetBuildDirectory(buffer) abort
+    " Don't include build directory for header files, as compile_commands.json
+    " files don't consider headers to be translation units, and provide no
+    " commands for compiling header files.
+    if expand('#' . a:buffer) =~# '\v\.(h|hpp)$'
+        return ''
+    endif
+
+    let l:build_dir = ale#Var(a:buffer, 'c_build_dir')
+
+    " c_build_dir has the priority if defined
+    if !empty(l:build_dir)
+        return l:build_dir
+    endif
+
+    return ale#c#FindCompileCommands(a:buffer)
+endfunction
 
 function! ale_linters#cpp#clangtidy#GetCommand(buffer) abort
-    let l:check_list = ale#Var(a:buffer, 'cpp_clangtidy_checks')
-    let l:check_option = !empty(l:check_list)
-    \   ? '-checks=' . shellescape(join(l:check_list, ',')) . ' '
-    \   : ''
-    let l:user_options = ale#Var(a:buffer, 'cpp_clangtidy_options')
-    let l:extra_options = !empty(l:user_options)
-    \   ? ' -- ' . l:user_options
+    let l:checks = join(ale#Var(a:buffer, 'cpp_clangtidy_checks'), ',')
+    let l:build_dir = s:GetBuildDirectory(a:buffer)
+
+    " Get the extra options if we couldn't find a build directory.
+    let l:options = empty(l:build_dir)
+    \   ? ale#Var(a:buffer, 'cpp_clangtidy_options')
     \   : ''
 
-    return 'clang-tidy ' . l:check_option . '%s' . l:extra_options
+    return ale#Escape(ale_linters#cpp#clangtidy#GetExecutable(a:buffer))
+    \   . (!empty(l:checks) ? ' -checks=' . ale#Escape(l:checks) : '')
+    \   . ' %s'
+    \   . (!empty(l:build_dir) ? ' -p ' . ale#Escape(l:build_dir) : '')
+    \   . (!empty(l:options) ? ' -- ' . l:options : '')
 endfunction
 
 call ale#linter#Define('cpp', {
 \   'name': 'clangtidy',
 \   'output_stream': 'stdout',
-\   'executable': 'clang-tidy',
+\   'executable_callback': 'ale_linters#cpp#clangtidy#GetExecutable',
 \   'command_callback': 'ale_linters#cpp#clangtidy#GetCommand',
 \   'callback': 'ale#handlers#gcc#HandleGCCFormat',
 \   'lint_file': 1,

ale_linters/cpp/cppcheck.vim

@@ -1,8 +1,12 @@
 " Author: Bart Libert <bart.libert@gmail.com>
 " Description: cppcheck linter for cpp files
 
-" Set this option to change the cppcheck options
-let g:ale_cpp_cppcheck_options = get(g:, 'ale_cpp_cppcheck_options', '--enable=style')
+call ale#Set('cpp_cppcheck_executable', 'cppcheck')
+call ale#Set('cpp_cppcheck_options', '--enable=style')
+
+function! ale_linters#cpp#cppcheck#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_cppcheck_executable')
+endfunction
 
 function! ale_linters#cpp#cppcheck#GetCommand(buffer) abort
     " Search upwards from the file for compile_commands.json.
@@ -19,7 +23,8 @@ function! ale_linters#cpp#cppcheck#GetCommand(buffer) abort
     \   : ''
 
     return l:cd_command
-    \   . 'cppcheck -q --language=c++ '
+    \   . ale#Escape(ale_linters#cpp#cppcheck#GetExecutable(a:buffer))
+    \   . ' -q --language=c++ '
     \   . l:compile_commands_option
     \   . ale#Var(a:buffer, 'cpp_cppcheck_options')
     \   . ' %t'
@@ -28,7 +33,7 @@ endfunction
 call ale#linter#Define('cpp', {
 \   'name': 'cppcheck',
 \   'output_stream': 'both',
-\   'executable': 'cppcheck',
+\   'executable_callback': 'ale_linters#cpp#cppcheck#GetExecutable',
 \   'command_callback': 'ale_linters#cpp#cppcheck#GetCommand',
 \   'callback': 'ale#handlers#cppcheck#HandleCppCheckFormat',
 \})

ale_linters/cpp/cpplint.vim

@@ -0,0 +1,26 @@
+" Author: Dawid Kurek https://github.com/dawikur
+" Description: cpplint for cpp files
+
+call ale#Set('cpp_cpplint_executable', 'cpplint')
+call ale#Set('cpp_cpplint_options', '')
+
+function! ale_linters#cpp#cpplint#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_cpplint_executable')
+endfunction
+
+function! ale_linters#cpp#cpplint#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'cpp_cpplint_options')
+
+    return ale#Escape(ale_linters#cpp#cpplint#GetExecutable(a:buffer))
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' %s'
+endfunction
+
+call ale#linter#Define('cpp', {
+\   'name': 'cpplint',
+\   'output_stream': 'stderr',
+\   'executable_callback': 'ale_linters#cpp#cpplint#GetExecutable',
+\   'command_callback': 'ale_linters#cpp#cpplint#GetCommand',
+\   'callback': 'ale#handlers#cpplint#HandleCppLintFormat',
+\   'lint_file': 1,
+\})

ale_linters/cpp/gcc.vim

@@ -1,33 +1,29 @@
 " Author: geam <mdelage@student.42.fr>
 " Description: gcc linter for cpp files
+"
+call ale#Set('cpp_gcc_executable', 'gcc')
+call ale#Set('cpp_gcc_options', '-std=c++14 -Wall')
 
-" Set this option to change the GCC options for warnings for C.
-if !exists('g:ale_cpp_gcc_options')
-    let s:version = ale#handlers#gcc#ParseGCCVersion(systemlist('gcc --version'))
-
-    if !empty(s:version) && ale#semver#GreaterOrEqual(s:version, [4, 9, 0])
-        " Use c++14 support in 4.9 and above.
-        let g:ale_cpp_gcc_options = '-std=c++14 -Wall'
-    else
-        " Use c++1y in older versions.
-        let g:ale_cpp_gcc_options = '-std=c++1y -Wall'
-    endif
-
-    unlet! s:version
-endif
+function! ale_linters#cpp#gcc#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'cpp_gcc_executable')
+endfunction
 
 function! ale_linters#cpp#gcc#GetCommand(buffer) abort
+    let l:paths = ale#c#FindLocalHeaderPaths(a:buffer)
+
     " -iquote with the directory the file is in makes #include work for
     "  headers in the same directory.
-    return 'gcc -S -x c++ -fsyntax-only '
-    \   . '-iquote ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-    \   . ' ' . ale#Var(a:buffer, 'cpp_gcc_options') . ' -'
+    return ale#Escape(ale_linters#cpp#gcc#GetExecutable(a:buffer))
+    \   . ' -S -x c++ -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h')) . ' '
+    \   . ale#c#IncludeOptions(l:paths)
+    \   . ale#Var(a:buffer, 'cpp_gcc_options') . ' -'
 endfunction
 
 call ale#linter#Define('cpp', {
 \   'name': 'g++',
 \   'output_stream': 'stderr',
-\   'executable': 'g++',
+\   'executable_callback': 'ale_linters#cpp#gcc#GetExecutable',
 \   'command_callback': 'ale_linters#cpp#gcc#GetCommand',
 \   'callback': 'ale#handlers#gcc#HandleGCCFormat',
 \})

ale_linters/crystal/crystal.vim

@@ -1,34 +1,24 @@
-" Author: Jordan Andree <https://github.com/jordanandree>
+" Author: Jordan Andree <https://github.com/jordanandree>, David Alexander <opensource@thelonelyghost.com>
 " Description: This file adds support for checking Crystal with crystal build
 
 function! ale_linters#crystal#crystal#Handle(buffer, lines) abort
     let l:output = []
 
-    let l:lines = join(a:lines, '')
-
-    if !empty(l:lines)
-      let l:errors = json_decode(l:lines)
-
-      for l:error in l:errors
-          call add(l:output, {
-          \   'bufnr': a:buffer,
-          \   'lnum': l:error.line + 0,
-          \   'col': l:error.column + 0,
-          \   'text': l:error.message,
-          \   'type': 'E',
-          \})
-      endfor
-    endif
+    for l:error in ale#util#FuzzyJSONDecode(a:lines, [])
+        call add(l:output, {
+        \   'lnum': l:error.line + 0,
+        \   'col': l:error.column + 0,
+        \   'text': l:error.message,
+        \})
+    endfor
 
     return l:output
 endfunction
 
 function! ale_linters#crystal#crystal#GetCommand(buffer) abort
-    let l:crystal_cmd = 'crystal build -f json --no-codegen -o '
-    let l:crystal_cmd .= shellescape(g:ale#util#nul_file)
-    let l:crystal_cmd .= ' %s'
-
-    return l:crystal_cmd
+    return 'crystal build -f json --no-codegen --no-color -o '
+    \   . ale#Escape(g:ale#util#nul_file)
+    \   . ' %s'
 endfunction
 
 call ale#linter#Define('crystal', {

ale_linters/css/csslint.vim

@@ -4,7 +4,7 @@
 function! ale_linters#css#csslint#GetCommand(buffer) abort
     let l:csslintrc = ale#path#FindNearestFile(a:buffer, '.csslintrc')
     let l:config_option = !empty(l:csslintrc)
-    \   ? '--config=' . fnameescape(l:csslintrc)
+    \   ? '--config=' . ale#Escape(l:csslintrc)
     \   : ''
 
     return 'csslint --format=compact ' . l:config_option . ' %t'

ale_linters/css/stylelint.vim

@@ -1,24 +1,13 @@
 " Author: diartyz <diartyz@gmail.com>
 
-let g:ale_css_stylelint_executable =
-\   get(g:, 'ale_css_stylelint_executable', 'stylelint')
-
-let g:ale_css_stylelint_options =
-\   get(g:, 'ale_css_stylelint_options', '')
-
-let g:ale_css_stylelint_use_global =
-\   get(g:, 'ale_css_stylelint_use_global', 0)
+call ale#Set('css_stylelint_executable', 'stylelint')
+call ale#Set('css_stylelint_options', '')
+call ale#Set('css_stylelint_use_global', 0)
 
 function! ale_linters#css#stylelint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'css_stylelint_use_global')
-        return ale#Var(a:buffer, 'css_stylelint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'css_stylelint', [
     \   'node_modules/.bin/stylelint',
-    \   ale#Var(a:buffer, 'css_stylelint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#css#stylelint#GetCommand(buffer) abort

ale_linters/d/dmd.vim

@@ -31,7 +31,7 @@ function! ale_linters#d#dmd#DUBCommand(buffer) abort
     " To support older dub versions, we just change the directory to
     " the directory where we found the dub config, and then run `dub describe`
     " from that directory.
-    return 'cd ' . fnameescape(fnamemodify(l:dub_file, ':h'))
+    return 'cd ' . ale#Escape(fnamemodify(l:dub_file, ':h'))
     \   . ' && dub describe --import-paths'
 endfunction
 
@@ -42,7 +42,7 @@ function! ale_linters#d#dmd#DMDCommand(buffer, dub_output) abort
     for l:line in a:dub_output
         if !empty(l:line)
             " The arguments must be '-Ifilename', not '-I filename'
-            call add(l:import_list, '-I' . fnameescape(l:line))
+            call add(l:import_list, '-I' . ale#Escape(l:line))
         endif
     endfor
 
@@ -60,7 +60,7 @@ function! ale_linters#d#dmd#Handle(buffer, lines) abort
         call add(l:output, {
         \   'lnum': l:match[1],
         \   'col': l:match[2],
-        \   'type': l:match[3] ==# 'Warning' ? 'W' : 'E',
+        \   'type': l:match[3] is# 'Warning' ? 'W' : 'E',
         \   'text': l:match[4],
         \})
     endfor

ale_linters/dart/dartanalyzer.vim

@@ -0,0 +1,40 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: Check Dart files with dartanalyzer
+
+call ale#Set('dart_dartanalyzer_executable', 'dartanalyzer')
+
+function! ale_linters#dart#dartanalyzer#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'dart_dartanalyzer_executable')
+endfunction
+
+function! ale_linters#dart#dartanalyzer#GetCommand(buffer) abort
+    let l:executable = ale_linters#dart#dartanalyzer#GetExecutable(a:buffer)
+    let l:path = ale#path#FindNearestFile(a:buffer, '.packages')
+
+    return ale#Escape(l:executable)
+    \   . (!empty(l:path) ? ' --packages ' . ale#Escape(l:path) : '')
+    \   . ' %t'
+endfunction
+
+function! ale_linters#dart#dartanalyzer#Handle(buffer, lines) abort
+    let l:pattern = '\v^  ([a-z]+) . (.+) at (.+):(\d+):(\d+) . (.+)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'type': l:match[1] is# 'error' ? 'E' : 'W',
+        \   'text': l:match[6] . ': ' . l:match[2],
+        \   'lnum': str2nr(l:match[4]),
+        \   'col': str2nr(l:match[5]),
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('dart', {
+\   'name': 'dartanalyzer',
+\   'executable_callback': 'ale_linters#dart#dartanalyzer#GetExecutable',
+\   'command_callback': 'ale_linters#dart#dartanalyzer#GetCommand',
+\   'callback': 'ale_linters#dart#dartanalyzer#Handle',
+\})

ale_linters/dockerfile/hadolint.vim

@@ -1,5 +1,9 @@
 " Author: hauleth - https://github.com/hauleth
 
+" always, yes, never
+call ale#Set('dockerfile_hadolint_use_docker', 'never')
+call ale#Set('dockerfile_hadolint_docker_image', 'lukasmartinelli/hadolint')
+
 function! ale_linters#dockerfile#hadolint#Handle(buffer, lines) abort
     " Matches patterns line the following:
     "
@@ -10,7 +14,7 @@ function! ale_linters#dockerfile#hadolint#Handle(buffer, lines) abort
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         let l:lnum = 0
 
-        if l:match[1] !=# ''
+        if l:match[1] isnot# ''
             let l:lnum = l:match[1] + 0
         endif
 
@@ -29,9 +33,45 @@ function! ale_linters#dockerfile#hadolint#Handle(buffer, lines) abort
     return l:output
 endfunction
 
+" This is a little different than the typical 'executable' callback.  We want
+" to afford the user the chance to say always use docker, never use docker,
+" and use docker if the hadolint executable is not present on the system.
+"
+" In the case of neither docker nor hadolint executables being present, it
+" really doesn't matter which we return -- either will have the effect of
+" 'nope, can't use this linter!'.
+
+function! ale_linters#dockerfile#hadolint#GetExecutable(buffer) abort
+    let l:use_docker = ale#Var(a:buffer, 'dockerfile_hadolint_use_docker')
+
+    " check for mandatory directives
+    if l:use_docker is# 'never'
+        return 'hadolint'
+    elseif l:use_docker is# 'always'
+        return 'docker'
+    endif
+
+    " if we reach here, we want to use 'hadolint' if present...
+    if executable('hadolint')
+        return 'hadolint'
+    endif
+
+    "... and 'docker' as a fallback.
+    return 'docker'
+endfunction
+
+function! ale_linters#dockerfile#hadolint#GetCommand(buffer) abort
+    let l:command = ale_linters#dockerfile#hadolint#GetExecutable(a:buffer)
+    if l:command is# 'docker'
+        return 'docker run --rm -i ' . ale#Var(a:buffer, 'dockerfile_hadolint_docker_image')
+    endif
+    return 'hadolint -'
+endfunction
+
+
 call ale#linter#Define('dockerfile', {
 \   'name': 'hadolint',
-\   'executable': 'hadolint',
-\   'command': 'hadolint -',
+\   'executable_callback': 'ale_linters#dockerfile#hadolint#GetExecutable',
+\   'command_callback': 'ale_linters#dockerfile#hadolint#GetCommand',
 \   'callback': 'ale_linters#dockerfile#hadolint#Handle',
 \})

ale_linters/elixir/credo.vim

@@ -11,9 +11,9 @@ function! ale_linters#elixir#credo#Handle(buffer, lines) abort
         let l:type = l:match[3]
         let l:text = l:match[4]
 
-        if l:type ==# 'C'
+        if l:type is# 'C'
             let l:type = 'E'
-        elseif l:type ==# 'R'
+        elseif l:type is# 'R'
             let l:type = 'W'
         endif
 

ale_linters/elixir/dogma.vim

@@ -11,9 +11,9 @@ function! ale_linters#elixir#dogma#Handle(buffer, lines) abort
         let l:type = l:match[3]
         let l:text = l:match[4]
 
-        if l:type ==# 'C'
+        if l:type is# 'C'
             let l:type = 'E'
-        elseif l:type ==# 'R'
+        elseif l:type is# 'R'
             let l:type = 'W'
         endif
 

ale_linters/elm/make.vim

@@ -5,33 +5,46 @@ function! ale_linters#elm#make#Handle(buffer, lines) abort
     let l:output = []
     let l:is_windows = has('win32')
     let l:temp_dir = l:is_windows ? $TMP : $TMPDIR
+    let l:unparsed_lines = []
     for l:line in a:lines
-        if l:line[0] ==# '['
+        if l:line[0] is# '['
             let l:errors = json_decode(l:line)
 
             for l:error in l:errors
                 " Check if file is from the temp directory.
                 " Filters out any errors not related to the buffer.
                 if l:is_windows
-                    let l:file_is_buffer = l:error.file[0:len(l:temp_dir) - 1] ==? l:temp_dir
+                    let l:file_is_buffer = l:error.file[0:len(l:temp_dir) - 1] is? l:temp_dir
                 else
-                    let l:file_is_buffer = l:error.file[0:len(l:temp_dir) - 1] ==# l:temp_dir
+                    let l:file_is_buffer = l:error.file[0:len(l:temp_dir) - 1] is# l:temp_dir
                 endif
 
                 if l:file_is_buffer
                     call add(l:output, {
-                    \    'bufnr': a:buffer,
                     \    'lnum': l:error.region.start.line,
                     \    'col': l:error.region.start.column,
-                    \    'type': (l:error.type ==? 'error') ? 'E' : 'W',
+                    \    'end_lnum': l:error.region.end.line,
+                    \    'end_col': l:error.region.end.column,
+                    \    'type': (l:error.type is? 'error') ? 'E' : 'W',
                     \    'text': l:error.overview,
                     \    'detail': l:error.overview . "\n\n" . l:error.details
                     \})
                 endif
             endfor
+        elseif l:line isnot# 'Successfully generated /dev/null'
+            call add(l:unparsed_lines, l:line)
         endif
     endfor
 
+    if len(l:unparsed_lines) > 0
+        call add(l:output, {
+        \    'lnum': 1,
+        \    'type': 'E',
+        \    'text': l:unparsed_lines[0],
+        \    'detail': join(l:unparsed_lines, "\n")
+        \})
+    endif
+
     return l:output
 endfunction
 
@@ -43,14 +56,14 @@ function! ale_linters#elm#make#GetCommand(buffer) abort
         let l:dir_set_cmd = ''
     else
         let l:root_dir = fnamemodify(l:elm_package, ':p:h')
-        let l:dir_set_cmd = 'cd ' . fnameescape(l:root_dir) . ' && '
+        let l:dir_set_cmd = 'cd ' . ale#Escape(l:root_dir) . ' && '
     endif
 
     " The elm-make compiler, at the time of this writing, uses '/dev/null' as
     " a sort of flag to tell the compiler not to generate an output file,
     " which is why this is hard coded here.
     " Source: https://github.com/elm-lang/elm-make/blob/master/src/Flags.hs
-    let l:elm_cmd = 'elm-make --report=json --output='.shellescape('/dev/null')
+    let l:elm_cmd = 'elm-make --report=json --output='.ale#Escape('/dev/null')
 
     return l:dir_set_cmd . ' ' . l:elm_cmd . ' %t'
 endfunction

ale_linters/erlang/erlc.vim

@@ -6,7 +6,7 @@ function! ale_linters#erlang#erlc#GetCommand(buffer) abort
     let l:output_file = tempname()
     call ale#engine#ManageFile(a:buffer, l:output_file)
 
-    return 'erlc -o ' . fnameescape(l:output_file)
+    return 'erlc -o ' . ale#Escape(l:output_file)
     \   . ' ' . ale#Var(a:buffer, 'erlang_erlc_options')
     \   . ' %t'
 endfunction
@@ -27,7 +27,7 @@ function! ale_linters#erlang#erlc#Handle(buffer, lines) abort
     let l:pattern_no_module_definition = '\v(no module definition)$'
     let l:pattern_unused = '\v(.* is unused)$'
 
-    let l:is_hrl = fnamemodify(bufname(a:buffer), ':e') ==# 'hrl'
+    let l:is_hrl = fnamemodify(bufname(a:buffer), ':e') is# 'hrl'
 
     for l:line in a:lines
         let l:match = matchlist(l:line, l:pattern)

ale_linters/erlang/syntaxerl.vim

@@ -0,0 +1,53 @@
+" Author: Dmitri Vereshchagin <dmitri.vereshchagin@gmail.com>
+" Description: SyntaxErl linter for Erlang files
+
+call ale#Set('erlang_syntaxerl_executable', 'syntaxerl')
+
+
+function! ale_linters#erlang#syntaxerl#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'erlang_syntaxerl_executable')
+endfunction
+
+
+function! ale_linters#erlang#syntaxerl#FeatureCheck(buffer) abort
+    return s:GetEscapedExecutable(a:buffer) . ' -h'
+endfunction
+
+
+function! ale_linters#erlang#syntaxerl#GetCommand(buffer, output) abort
+    let l:use_b_option = match(a:output, '\C\V-b, --base\>') > -1
+
+    return s:GetEscapedExecutable(a:buffer) . (l:use_b_option ? ' -b %s %t' : ' %t')
+endfunction
+
+
+function! ale_linters#erlang#syntaxerl#Handle(buffer, lines) abort
+    let l:pattern = '\v\C:(\d+):( warning:)? (.+)'
+    let l:loclist = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:loclist, {
+        \   'lnum': l:match[1] + 0,
+        \   'text': l:match[3],
+        \   'type': empty(l:match[2]) ? 'E' : 'W',
+        \})
+    endfor
+
+    return l:loclist
+endfunction
+
+
+function! s:GetEscapedExecutable(buffer) abort
+    return ale#Escape(ale_linters#erlang#syntaxerl#GetExecutable(a:buffer))
+endfunction
+
+
+call ale#linter#Define('erlang', {
+\   'name': 'syntaxerl',
+\   'executable_callback': 'ale_linters#erlang#syntaxerl#GetExecutable',
+\   'command_chain': [
+\       {'callback': 'ale_linters#erlang#syntaxerl#FeatureCheck'},
+\       {'callback': 'ale_linters#erlang#syntaxerl#GetCommand'},
+\   ],
+\   'callback': 'ale_linters#erlang#syntaxerl#Handle',
+\})

ale_linters/eruby/erubis.vim

@@ -0,0 +1,11 @@
+" Author: Jake Zimmerman <jake@zimmerman.io>
+" Description: eruby checker using `erubis`, instead of `erb`
+
+call ale#linter#Define('eruby', {
+\   'name': 'erubis',
+\   'executable': 'erubis',
+\   'output_stream': 'stderr',
+\   'command': 'erubis -x %t | ruby -c',
+\   'callback': 'ale#handlers#ruby#HandleSyntaxErrors',
+\})
+

ale_linters/fortran/gcc.vim

@@ -44,7 +44,7 @@ function! ale_linters#fortran#gcc#Handle(buffer, lines) abort
 
             " Now we have the text, we can set it and add the error.
             let l:last_loclist_obj.text = l:match[2]
-            let l:last_loclist_obj.type = l:match[1] ==# 'Warning' ? 'W' : 'E'
+            let l:last_loclist_obj.type = l:match[1] is# 'Warning' ? 'W' : 'E'
             call add(l:output, l:last_loclist_obj)
         else
             let l:last_loclist_obj = {

ale_linters/fuse/fusionlint.vim

@@ -0,0 +1,41 @@
+" Author: RyanSquared <vandor2012@gmail.com>
+" Description: `fusion-lint` linter for FusionScript files
+
+let g:ale_fuse_fusionlint_executable =
+\   get(g:, 'ale_fuse_fusionlint_executable', 'fusion-lint')
+
+let g:ale_fuse_fusionlint_options =
+\   get(g:, 'ale_fuse_fusionlint_options', '')
+
+function! ale_linters#fuse#fusionlint#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'fuse_fusionlint_executable')
+endfunction
+
+function! ale_linters#fuse#fusionlint#GetCommand(buffer) abort
+    return ale#Escape(ale_linters#fuse#fusionlint#GetExecutable(a:buffer))
+    \   . ' ' . ale#Var(a:buffer, 'fuse_fusionlint_options')
+    \   . ' --filename %s -i'
+endfunction
+
+function! ale_linters#fuse#fusionlint#Handle(buffer, lines) abort
+    let l:pattern = '^.*:\(\d\+\):\(\d\+\): (\([WE]\)\d\+) \(.\+\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:match[4],
+        \   'type': l:match[3],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('fuse', {
+\   'name': 'fusionlint',
+\   'executable_callback': 'ale_linters#fuse#fusionlint#GetExecutable',
+\   'command_callback': 'ale_linters#fuse#fusionlint#GetCommand',
+\   'callback': 'ale_linters#fuse#fusionlint#Handle',
+\})

ale_linters/go/gometalinter.vim

@@ -1,14 +1,22 @@
 " Author: Ben Reedy <https://github.com/breed808>
 " Description: Adds support for the gometalinter suite for Go files
 
-if !exists('g:ale_go_gometalinter_options')
-    let g:ale_go_gometalinter_options = ''
-endif
+call ale#Set('go_gometalinter_options', '')
+call ale#Set('go_gometalinter_executable', 'gometalinter')
+
+function! ale_linters#go#gometalinter#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'go_gometalinter_executable')
+endfunction
 
 function! ale_linters#go#gometalinter#GetCommand(buffer) abort
-    return 'gometalinter '
-    \   . ale#Var(a:buffer, 'go_gometalinter_options')
-    \   . ' ' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
+    let l:executable = ale_linters#go#gometalinter#GetExecutable(a:buffer)
+    let l:filename = expand('#' . a:buffer)
+    let l:options = ale#Var(a:buffer, 'go_gometalinter_options')
+
+    return ale#Escape(l:executable)
+    \   . ' --include=' . ale#Escape('^' . ale#util#EscapePCRE(l:filename))
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' ' . ale#Escape(fnamemodify(l:filename, ':h'))
 endfunction
 
 function! ale_linters#go#gometalinter#GetMatches(lines) abort
@@ -21,15 +29,10 @@ function! ale_linters#go#gometalinter#Handler(buffer, lines) abort
     let l:output = []
 
     for l:match in ale_linters#go#gometalinter#GetMatches(a:lines)
-        " Omit errors from files other than the one currently open
-        if ale#path#IsBufferPath(a:buffer, l:match[0])
-            continue
-        endif
-
         call add(l:output, {
         \   'lnum': l:match[2] + 0,
         \   'col': l:match[3] + 0,
-        \   'type': tolower(l:match[4]) ==# 'warning' ? 'W' : 'E',
+        \   'type': tolower(l:match[4]) is# 'warning' ? 'W' : 'E',
         \   'text': l:match[5],
         \})
     endfor
@@ -39,7 +42,7 @@ endfunction
 
 call ale#linter#Define('go', {
 \   'name': 'gometalinter',
-\   'executable': 'gometalinter',
+\   'executable_callback': 'ale_linters#go#gometalinter#GetExecutable',
 \   'command_callback': 'ale_linters#go#gometalinter#GetCommand',
 \   'callback': 'ale_linters#go#gometalinter#Handler',
 \   'lint_file': 1,

ale_linters/go/gosimple.vim

@@ -6,4 +6,5 @@ call ale#linter#Define('go', {
 \   'executable': 'gosimple',
 \   'command': 'gosimple %t',
 \   'callback': 'ale#handlers#unix#HandleAsWarning',
+\   'output_stream': 'both'
 \})

ale_linters/go/staticcheck.vim

@@ -6,4 +6,5 @@ call ale#linter#Define('go', {
 \   'executable': 'staticcheck',
 \   'command': 'staticcheck %t',
 \   'callback': 'ale#handlers#unix#HandleAsWarning',
+\   'output_stream': 'both'
 \})

ale_linters/graphql/gqlint.vim

@@ -0,0 +1,9 @@
+" Author: Michiel Westerbeek <happylinks@gmail.com>
+" Description: Linter for GraphQL Schemas
+
+call ale#linter#Define('graphql', {
+\   'name': 'gqlint',
+\   'executable': 'gqlint',
+\   'command': 'gqlint --reporter=simple %t',
+\   'callback': 'ale#handlers#unix#HandleAsWarning',
+\})

ale_linters/handlebars/embertemplatelint.vim

@@ -1,22 +1,13 @@
 " Author: Adrian Zalewski <aazalewski@hotmail.com>
 " Description: Ember-template-lint for checking Handlebars files
 
-let g:ale_handlebars_embertemplatelint_executable =
-\   get(g:, 'ale_handlebars_embertemplatelint_executable', 'ember-template-lint')
-
-let g:ale_handlebars_embertemplatelint_use_global =
-\   get(g:, 'ale_handlebars_embertemplatelint_use_global', 0)
+call ale#Set('handlebars_embertemplatelint_executable', 'ember-template-lint')
+call ale#Set('handlebars_embertemplatelint_use_global', 0)
 
 function! ale_linters#handlebars#embertemplatelint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'handlebars_embertemplatelint_use_global')
-        return ale#Var(a:buffer, 'handlebars_embertemplatelint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'handlebars_embertemplatelint', [
     \   'node_modules/.bin/ember-template-lint',
-    \   ale#Var(a:buffer, 'handlebars_embertemplatelint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#handlebars#embertemplatelint#GetCommand(buffer) abort
@@ -25,23 +16,27 @@ function! ale_linters#handlebars#embertemplatelint#GetCommand(buffer) abort
 endfunction
 
 function! ale_linters#handlebars#embertemplatelint#Handle(buffer, lines) abort
-    if len(a:lines) == 0
-      return []
-    endif
-
     let l:output = []
+    let l:json = ale#util#FuzzyJSONDecode(a:lines, {})
 
-    let l:input_json = json_decode(join(a:lines, ''))
-    let l:file_errors = values(l:input_json)[0]
-
-    for l:error in l:file_errors
-        call add(l:output, {
-        \   'bufnr': a:buffer,
-        \   'lnum': l:error.line,
-        \   'col': l:error.column,
-        \   'text': l:error.rule . ': ' . l:error.message,
-        \   'type': l:error.severity == 1 ? 'W' : 'E',
-        \})
+    for l:error in get(values(l:json), 0, [])
+        if has_key(l:error, 'fatal')
+            call add(l:output, {
+            \   'bufnr': a:buffer,
+            \   'lnum': 1,
+            \   'col': 1,
+            \   'text': l:error.message,
+            \   'type': l:error.severity == 1 ? 'W' : 'E',
+            \})
+        else
+            call add(l:output, {
+            \   'bufnr': a:buffer,
+            \   'lnum': l:error.line,
+            \   'col': l:error.column,
+            \   'text': l:error.rule . ': ' . l:error.message,
+            \   'type': l:error.severity == 1 ? 'W' : 'E',
+            \})
+        endif
     endfor
 
     return l:output

ale_linters/haskell/ghc-mod.vim

@@ -0,0 +1,16 @@
+" Author: wizzup <wizzup@gmail.com>
+" Description: ghc-mod for Haskell files
+
+call ale#linter#Define('haskell', {
+\   'name': 'ghc-mod',
+\   'executable': 'ghc-mod',
+\   'command': 'ghc-mod --map-file %s=%t check %s',
+\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
+\})
+
+call ale#linter#Define('haskell', {
+\   'name': 'stack-ghc-mod',
+\   'executable': 'stack',
+\   'command': 'stack exec ghc-mod -- --map-file %s=%t check %s',
+\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
+\})

ale_linters/haskell/ghc.vim

@@ -8,11 +8,3 @@ call ale#linter#Define('haskell', {
 \   'command': 'ghc -fno-code -v0 %t',
 \   'callback': 'ale#handlers#haskell#HandleGHCFormat',
 \})
-
-call ale#linter#Define('haskell', {
-\   'name': 'stack-ghc',
-\   'output_stream': 'stderr',
-\   'executable': 'stack',
-\   'command': 'stack ghc -- -fno-code -v0 %t',
-\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
-\})

ale_linters/haskell/hdevtools.vim

@@ -1,9 +1,22 @@
-" Author: rob-b
+" Author: rob-b, Takano Akio <tak@anoak.io>
 " Description: hdevtools for Haskell files
 
+call ale#Set('haskell_hdevtools_executable', 'hdevtools')
+call ale#Set('haskell_hdevtools_options', '-g -Wall')
+
+function! ale_linters#haskell#hdevtools#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'haskell_hdevtools_executable')
+endfunction
+
+function! ale_linters#haskell#hdevtools#GetCommand(buffer) abort
+    return ale#Escape(ale_linters#haskell#hdevtools#GetExecutable(a:buffer))
+        \ . ' check ' . ale#Var(a:buffer, 'haskell_hdevtools_options')
+        \ . ' -p %s %t'
+endfunction
+
 call ale#linter#Define('haskell', {
 \   'name': 'hdevtools',
-\   'executable': 'hdevtools',
-\   'command': 'hdevtools check -g -Wall -p %s %t',
+\   'executable_callback': 'ale_linters#haskell#hdevtools#GetExecutable',
+\   'command_callback': 'ale_linters#haskell#hdevtools#GetCommand',
 \   'callback': 'ale#handlers#haskell#HandleGHCFormat',
 \})

ale_linters/haskell/hlint.vim

@@ -2,17 +2,24 @@
 " Description: hlint for Haskell files
 
 function! ale_linters#haskell#hlint#Handle(buffer, lines) abort
-    let l:errors = json_decode(join(a:lines, ''))
-
     let l:output = []
 
-    for l:error in l:errors
+    for l:error in ale#util#FuzzyJSONDecode(a:lines, [])
+        if l:error.severity is# 'Error'
+            let l:type = 'E'
+        elseif l:error.severity is# 'Suggestion'
+            let l:type = 'I'
+        else
+            let l:type = 'W'
+        endif
+
         call add(l:output, {
-        \   'bufnr': a:buffer,
-        \   'lnum': l:error.startLine + 0,
-        \   'col': l:error.startColumn + 0,
+        \   'lnum': str2nr(l:error.startLine),
+        \   'col': str2nr(l:error.startColumn),
+        \   'end_lnum': str2nr(l:error.endLine),
+        \   'end_col': str2nr(l:error.endColumn),
         \   'text': l:error.severity . ': ' . l:error.hint . '. Found: ' . l:error.from . ' Why not: ' . l:error.to,
-        \   'type': l:error.severity ==# 'Error' ? 'E' : 'W',
+        \   'type': l:type,
         \})
     endfor
 

ale_linters/haskell/stack_build.vim

@@ -0,0 +1,22 @@
+" Author: Jake Zimmerman <jake@zimmerman.io>
+" Description: Like stack-ghc, but for entire projects
+"
+" Note: Ideally, this would *only* typecheck. Right now, it also does codegen.
+" See <https://github.com/commercialhaskell/stack/issues/977>.
+
+call ale#Set('haskell_stack_build_options', '--fast')
+
+function ale_linters#haskell#stack_build#GetCommand(buffer) abort
+    let l:flags = ale#Var(a:buffer, 'haskell_stack_build_options')
+
+    return 'stack build ' . l:flags
+endfunction
+
+call ale#linter#Define('haskell', {
+\   'name': 'stack-build',
+\   'output_stream': 'stderr',
+\   'executable': 'stack',
+\   'command_callback': 'ale_linters#haskell#stack_build#GetCommand',
+\   'lint_file': 1,
+\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
+\})

ale_linters/haskell/stack_ghc.vim

@@ -0,0 +1,10 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: ghc for Haskell files, using Stack
+
+call ale#linter#Define('haskell', {
+\   'name': 'stack-ghc',
+\   'output_stream': 'stderr',
+\   'executable': 'stack',
+\   'command': 'stack ghc -- -fno-code -v0 %t',
+\   'callback': 'ale#handlers#haskell#HandleGHCFormat',
+\})

ale_linters/html/htmlhint.vim

@@ -1,21 +1,14 @@
 " Author: KabbAmine <amine.kabb@gmail.com>, deathmaz <00maz1987@gmail.com>, diartyz <diartyz@gmail.com>
 " Description: HTMLHint for checking html files
 
-" CLI options
-let g:ale_html_htmlhint_options = get(g:, 'ale_html_htmlhint_options', '--format=unix')
-let g:ale_html_htmlhint_executable = get(g:, 'ale_html_htmlhint_executable', 'htmlhint')
-let g:ale_html_htmlhint_use_global = get(g:, 'ale_html_htmlhint_use_global', 0)
+call ale#Set('html_htmlhint_options', '--format=unix')
+call ale#Set('html_htmlhint_executable', 'htmlhint')
+call ale#Set('html_htmlhint_use_global', 0)
 
 function! ale_linters#html#htmlhint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'html_htmlhint_use_global')
-        return ale#Var(a:buffer, 'html_htmlhint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'html_htmlhint', [
     \   'node_modules/.bin/htmlhint',
-    \   ale#Var(a:buffer, 'html_htmlhint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#html#htmlhint#GetCommand(buffer) abort

ale_linters/html/tidy.vim

@@ -46,7 +46,7 @@ function! ale_linters#html#tidy#Handle(buffer, lines) abort
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         let l:line = l:match[1] + 0
         let l:col = l:match[2] + 0
-        let l:type = l:match[3] ==# 'Error' ? 'E' : 'W'
+        let l:type = l:match[3] is# 'Error' ? 'E' : 'W'
         let l:text = l:match[4]
 
         call add(l:output, {

ale_linters/idris/idris.vim

@@ -0,0 +1,87 @@
+" Author: Scott Bonds <scott@ggr.com>
+" Description: default Idris compiler
+
+call ale#Set('idris_idris_executable', 'idris')
+call ale#Set('idris_idris_options', '--total --warnpartial --warnreach --warnipkg')
+
+function! ale_linters#idris#idris#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'idris_idris_executable')
+endfunction
+
+function! ale_linters#idris#idris#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'idris_idris_options')
+
+    return ale#Escape(ale_linters#idris#idris#GetExecutable(a:buffer))
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' --check %s'
+endfunction
+
+function! ale_linters#idris#idris#Handle(buffer, lines) abort
+    " This was copied almost verbatim from ale#handlers#haskell#HandleGHCFormat
+
+    " Look for lines like the following:
+    " foo.idr:2:6:When checking right hand side of main with expected type
+    " bar.idr:11:11-13:
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):(\d+)(-\d+)?:(.*)?$'
+    let l:output = []
+
+    let l:corrected_lines = []
+
+    for l:line in a:lines
+        if len(matchlist(l:line, l:pattern)) > 0
+            call add(l:corrected_lines, l:line)
+        elseif len(l:corrected_lines) > 0
+            if l:line is# ''
+                let l:corrected_lines[-1] .= ' ' " turn a blank line into a space
+            else
+                let l:corrected_lines[-1] .= l:line
+            endif
+            let l:corrected_lines[-1] = substitute(l:corrected_lines[-1], '\s\+', ' ', 'g')
+        endif
+    endfor
+
+    for l:line in l:corrected_lines
+        let l:match = matchlist(l:line, l:pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        if !ale#path#IsBufferPath(a:buffer, l:match[1])
+            continue
+        endif
+
+        let l:errors = matchlist(l:match[5], '\v([wW]arning|[eE]rror) - ?(.*)')
+
+        if len(l:errors) > 0
+          let l:ghc_type = l:errors[1]
+          let l:text = l:errors[2]
+        else
+          let l:ghc_type = ''
+          let l:text = l:match[5][:0] is# ' ' ? l:match[5][1:] : l:match[5]
+        endif
+
+        if l:ghc_type is? 'Warning'
+            let l:type = 'W'
+        else
+            let l:type = 'E'
+        endif
+
+        call add(l:output, {
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'text': l:text,
+        \   'type': l:type,
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('idris', {
+\   'name': 'idris',
+\   'executable_callback': 'ale_linters#idris#idris#GetExecutable',
+\   'command_callback': 'ale_linters#idris#idris#GetCommand',
+\   'callback': 'ale_linters#idris#idris#Handle',
+\})
+

ale_linters/java/checkstyle.vim

@@ -0,0 +1,46 @@
+" Author: Devon Meunier <devon.meunier@gmail.com>
+" Description: checkstyle for Java files
+
+function! ale_linters#java#checkstyle#Handle(buffer, lines) abort
+    let l:patterns = [
+        \ '\v\[(WARN|ERROR)\] .*:(\d+):(\d+): (.*)',
+        \ '\v\[(WARN|ERROR)\] .*:(\d+): (.*)',
+        \]
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:patterns)
+        let l:args = {
+        \   'lnum': l:match[2] + 0,
+        \   'type': l:match[1] =~? 'WARN' ? 'W' : 'E'
+        \ }
+
+        let l:col = l:match[3] + 0
+        if l:col > 0
+            let l:args['col'] = l:col
+            let l:args['text'] = l:match[4]
+        else
+            let l:args['text'] = l:match[3]
+        endif
+
+        call add(l:output, l:args)
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#java#checkstyle#GetCommand(buffer) abort
+    return 'checkstyle '
+    \ . ale#Var(a:buffer, 'java_checkstyle_options')
+    \ . ' %t'
+endfunction
+
+if !exists('g:ale_java_checkstyle_options')
+    let g:ale_java_checkstyle_options = '-c /google_checks.xml'
+endif
+
+call ale#linter#Define('java', {
+\   'name': 'checkstyle',
+\   'executable': 'checkstyle',
+\   'command_callback': 'ale_linters#java#checkstyle#GetCommand',
+\   'callback': 'ale_linters#java#checkstyle#Handle',
+\})

ale_linters/java/javac.vim

@@ -6,27 +6,6 @@ let s:classpath_sep = has('unix') ? ':' : ';'
 let g:ale_java_javac_options = get(g:, 'ale_java_javac_options', '')
 let g:ale_java_javac_classpath = get(g:, 'ale_java_javac_classpath', '')
 
-" Detect if the javac command just shows an annoying popup for Mac OSX.
-if has('macunix')
-    function s:GetIsJavacAnAppStoreStub() abort
-        let l:path = resolve(systemlist('which javac')[0])
-
-        for l:line in readfile(l:path)
-            " This string is present inside the executable for the popup.
-            if l:line =~? 'No Java runtime present'
-                return 1
-            endif
-        endfor
-
-        return 0
-    endfunction
-
-    let s:is_javac_an_app_store_stub = s:GetIsJavacAnAppStoreStub()
-    delfunction s:GetIsJavacAnAppStoreStub
-else
-    let s:is_javac_an_app_store_stub = 0
-endif
-
 function! ale_linters#java#javac#GetImportPaths(buffer) abort
     let l:pom_path = ale#path#FindNearestFile(a:buffer, 'pom.xml')
 
@@ -41,23 +20,17 @@ endfunction
 function! s:BuildClassPathOption(buffer, import_paths) abort
     " Filter out lines like [INFO], etc.
     let l:class_paths = filter(a:import_paths[:], 'v:val !~# ''[''')
-    call map(l:class_paths, 'fnameescape(v:val)')
     call extend(
     \   l:class_paths,
     \   split(ale#Var(a:buffer, 'java_javac_classpath'), s:classpath_sep),
     \)
 
     return !empty(l:class_paths)
-    \   ? '-cp ' . join(l:class_paths, s:classpath_sep)
+    \   ? '-cp ' . ale#Escape(join(l:class_paths, s:classpath_sep))
     \   : ''
 endfunction
 
 function! ale_linters#java#javac#GetCommand(buffer, import_paths) abort
-    " If running the command will just show a popup, then don't run it.
-    if s:is_javac_an_app_store_stub
-        return ''
-    endif
-
     let l:cp_option = s:BuildClassPathOption(a:buffer, a:import_paths)
     let l:sp_option = ''
 
@@ -65,7 +38,7 @@ function! ale_linters#java#javac#GetCommand(buffer, import_paths) abort
     let l:src_dir = ale#path#FindNearestDirectory(a:buffer, 'src/main/java')
 
     if !empty(l:src_dir)
-        let l:sp_option = '-sourcepath ' . fnameescape(l:src_dir)
+        let l:sp_option = '-sourcepath ' . ale#Escape(l:src_dir)
     endif
 
     " Create .class files in a temporary directory, which we will delete later.
@@ -74,7 +47,7 @@ function! ale_linters#java#javac#GetCommand(buffer, import_paths) abort
     return 'javac -Xlint'
     \ . ' ' . l:cp_option
     \ . ' ' . l:sp_option
-    \ . ' -d ' . fnameescape(l:class_file_directory)
+    \ . ' -d ' . ale#Escape(l:class_file_directory)
     \ . ' ' . ale#Var(a:buffer, 'java_javac_options')
     \ . ' %t'
 endfunction
@@ -86,20 +59,23 @@ function! ale_linters#java#javac#Handle(buffer, lines) abort
     " Main.java:16: error: ';' expected
 
     let l:pattern = '\v^.*:(\d+): (.+):(.+)$'
+    let l:col_pattern = '\v^(\s*\^)$'
     let l:symbol_pattern = '\v^ +symbol: *(class|method) +([^ ]+)'
     let l:output = []
 
-    for l:match in ale#util#GetMatches(a:lines, [l:pattern, l:symbol_pattern])
-        if empty(l:match[3])
+    for l:match in ale#util#GetMatches(a:lines, [l:pattern, l:col_pattern, l:symbol_pattern])
+        if empty(l:match[2]) && empty(l:match[3])
+                let l:output[-1].col = len(l:match[1])
+        elseif empty(l:match[3])
             " Add symbols to 'cannot find symbol' errors.
-            if l:output[-1].text ==# 'error: cannot find symbol'
+            if l:output[-1].text is# 'error: cannot find symbol'
                 let l:output[-1].text .= ': ' . l:match[2]
             endif
         else
             call add(l:output, {
             \   'lnum': l:match[1] + 0,
             \   'text': l:match[2] . ':' . l:match[3],
-            \   'type': l:match[2] ==# 'error' ? 'E' : 'W',
+            \   'type': l:match[2] is# 'error' ? 'E' : 'W',
             \})
         endif
     endfor

ale_linters/javascript/eslint.vim

@@ -1,97 +1,9 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: eslint for JavaScript files
 
-let g:ale_javascript_eslint_executable =
-\   get(g:, 'ale_javascript_eslint_executable', 'eslint')
-
-let g:ale_javascript_eslint_options =
-\   get(g:, 'ale_javascript_eslint_options', '')
-
-let g:ale_javascript_eslint_use_global =
-\   get(g:, 'ale_javascript_eslint_use_global', 0)
-
-function! ale_linters#javascript#eslint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'javascript_eslint_use_global')
-        return ale#Var(a:buffer, 'javascript_eslint_executable')
-    endif
-
-    " Look for the kinds of paths that create-react-app generates first.
-    let l:executable = ale#path#ResolveLocalPath(
-    \   a:buffer,
-    \   'node_modules/eslint/bin/eslint.js',
-    \   ''
-    \)
-
-    if !empty(l:executable)
-        return l:executable
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
-    \   'node_modules/.bin/eslint',
-    \   ale#Var(a:buffer, 'javascript_eslint_executable')
-    \)
-endfunction
-
-function! ale_linters#javascript#eslint#GetCommand(buffer) abort
-    return fnameescape(ale_linters#javascript#eslint#GetExecutable(a:buffer))
-    \   . ' ' . ale#Var(a:buffer, 'javascript_eslint_options')
-    \   . ' -f unix --stdin --stdin-filename %s'
-endfunction
-
-function! ale_linters#javascript#eslint#Handle(buffer, lines) abort
-    let l:config_error_pattern = '\v^ESLint couldn''t find a configuration file'
-    \   . '|^Cannot read config file'
-    \   . '|^.*Configuration for rule .* is invalid'
-
-    " Look for a message in the first few lines which indicates that
-    " a configuration file couldn't be found.
-    for l:line in a:lines[:10]
-        if len(matchlist(l:line, l:config_error_pattern)) > 0
-            return [{
-            \   'lnum': 1,
-            \   'text': 'eslint configuration error (type :ALEDetail for more information)',
-            \   'detail': join(a:lines, "\n"),
-            \}]
-        endif
-    endfor
-
-    " Matches patterns line the following:
-    "
-    " /path/to/some-filename.js:47:14: Missing trailing comma. [Warning/comma-dangle]
-    " /path/to/some-filename.js:56:41: Missing semicolon. [Error/semi]
-    let l:pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\) \[\(.\+\)\]$'
-    " This second pattern matches lines like the following:
-    "
-    " /path/to/some-filename.js:13:3: Parsing error: Unexpected token
-    let l:parsing_pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\)$'
-    let l:output = []
-
-    for l:match in ale#util#GetMatches(a:lines, [l:pattern, l:parsing_pattern])
-        let l:type = 'Error'
-        let l:text = l:match[3]
-
-        " Take the error type from the output if available.
-        if !empty(l:match[4])
-            let l:type = split(l:match[4], '/')[0]
-            let l:text .= ' [' . l:match[4] . ']'
-        endif
-
-        call add(l:output, {
-        \   'bufnr': a:buffer,
-        \   'lnum': l:match[1] + 0,
-        \   'col': l:match[2] + 0,
-        \   'text': l:text,
-        \   'type': l:type ==# 'Warning' ? 'W' : 'E',
-        \})
-    endfor
-
-    return l:output
-endfunction
-
 call ale#linter#Define('javascript', {
 \   'name': 'eslint',
-\   'executable_callback': 'ale_linters#javascript#eslint#GetExecutable',
-\   'command_callback': 'ale_linters#javascript#eslint#GetCommand',
-\   'callback': 'ale_linters#javascript#eslint#Handle',
+\   'executable_callback': 'ale#handlers#eslint#GetExecutable',
+\   'command_callback': 'ale#handlers#eslint#GetCommand',
+\   'callback': 'ale#handlers#eslint#Handle',
 \})

ale_linters/javascript/flow.vim

@@ -1,25 +1,21 @@
 " Author: Zach Perrault -- @zperrault
 " Description: FlowType checking for JavaScript files
 
-let g:ale_javascript_flow_executable =
-\   get(g:, 'ale_javascript_flow_executable', 'flow')
-
-let g:ale_javascript_flow_use_global =
-\   get(g:, 'ale_javascript_flow_use_global', 0)
+call ale#Set('javascript_flow_executable', 'flow')
+call ale#Set('javascript_flow_use_global', 0)
 
 function! ale_linters#javascript#flow#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'javascript_flow_use_global')
-        return ale#Var(a:buffer, 'javascript_flow_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'javascript_flow', [
     \   'node_modules/.bin/flow',
-    \   ale#Var(a:buffer, 'javascript_flow_executable')
-    \)
+    \])
 endfunction
 
-function! ale_linters#javascript#flow#GetCommand(buffer) abort
+function! ale_linters#javascript#flow#VersionCheck(buffer) abort
+    return ale#Escape(ale_linters#javascript#flow#GetExecutable(a:buffer))
+    \   . ' --version'
+endfunction
+
+function! ale_linters#javascript#flow#GetCommand(buffer, version_lines) abort
     let l:flow_config = ale#path#FindNearestFile(a:buffer, '.flowconfig')
 
     if empty(l:flow_config)
@@ -27,14 +23,43 @@ function! ale_linters#javascript#flow#GetCommand(buffer) abort
         return ''
     endif
 
-    return fnameescape(ale_linters#javascript#flow#GetExecutable(a:buffer))
-    \   . ' check-contents --respect-pragma --json --from ale %s'
+    let l:use_respect_pragma = 1
+
+    " If we can parse the version number, then only use --respect-pragma
+    " if the version is >= 0.36.0, which added the argument.
+    for l:match in ale#util#GetMatches(a:version_lines, '\v\d+\.\d+\.\d+$')
+        let l:use_respect_pragma = ale#semver#GreaterOrEqual(
+        \   ale#semver#Parse(l:match[0]),
+        \   [0, 36, 0]
+        \)
+    endfor
+
+    return ale#Escape(ale_linters#javascript#flow#GetExecutable(a:buffer))
+    \   . ' check-contents'
+    \   . (l:use_respect_pragma ? ' --respect-pragma': '')
+    \   . ' --json --from ale %s'
+endfunction
+
+" Filter lines of flow output until we find the first line where the JSON
+" output starts.
+function! s:GetJSONLines(lines) abort
+    let l:start_index = 0
+
+    for l:line in a:lines
+        if l:line[:0] is# '{'
+            break
+        endif
+
+        let l:start_index += 1
+    endfor
+
+    return a:lines[l:start_index :]
 endfunction
 
 function! ale_linters#javascript#flow#Handle(buffer, lines) abort
-    let l:str = join(a:lines, '')
+    let l:str = join(s:GetJSONLines(a:lines), '')
 
-    if l:str ==# ''
+    if empty(l:str)
         return []
     endif
 
@@ -51,12 +76,14 @@ function! ale_linters#javascript#flow#Handle(buffer, lines) abort
             " Comments have no line of column information, so we skip them.
             " In certain cases, `l:message.loc.source` points to a different path
             " than the buffer one, thus we skip this loc information too.
-            if has_key(l:message, 'loc') && l:line ==# 0 && l:message.loc.source ==# expand('#' . a:buffer . ':p')
+            if has_key(l:message, 'loc')
+            \&& l:line is# 0
+            \&& ale#path#IsBufferPath(a:buffer, l:message.loc.source)
                 let l:line = l:message.loc.start.line + 0
                 let l:col = l:message.loc.start.column + 0
             endif
 
-            if l:text ==# ''
+            if l:text is# ''
                 let l:text = l:message.descr . ':'
             else
                 let l:text = l:text . ' ' . l:message.descr
@@ -71,7 +98,7 @@ function! ale_linters#javascript#flow#Handle(buffer, lines) abort
         \   'lnum': l:line,
         \   'col': l:col,
         \   'text': l:text,
-        \   'type': l:error.level ==# 'error' ? 'E' : 'W',
+        \   'type': l:error.level is# 'error' ? 'E' : 'W',
         \})
     endfor
 
@@ -81,6 +108,10 @@ endfunction
 call ale#linter#Define('javascript', {
 \   'name': 'flow',
 \   'executable_callback': 'ale_linters#javascript#flow#GetExecutable',
-\   'command_callback': 'ale_linters#javascript#flow#GetCommand',
+\   'command_chain': [
+\       {'callback': 'ale_linters#javascript#flow#VersionCheck'},
+\       {'callback': 'ale_linters#javascript#flow#GetCommand'},
+\   ],
 \   'callback': 'ale_linters#javascript#flow#Handle',
+\   'add_newline': !has('win32'),
 \})

ale_linters/javascript/jscs.vim

@@ -1,9 +1,63 @@
 " Author: Chris Kyrouac - https://github.com/fijshion
 " Description: jscs for JavaScript files
 
+call ale#Set('javascript_jscs_executable', 'jscs')
+call ale#Set('javascript_jscs_use_global', 0)
+
+function! ale_linters#javascript#jscs#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'javascript_jscs', [
+    \   'node_modules/.bin/jscs',
+    \])
+endfunction
+
+function! ale_linters#javascript#jscs#GetCommand(buffer) abort
+    " Search for a local JShint config locaation, and default to a global one.
+    let l:jscs_config = ale#path#ResolveLocalPath(
+    \   a:buffer,
+    \   '.jscsrc',
+    \   get(g:, 'ale_jscs_config_loc', '')
+    \)
+
+    let l:command = ale#Escape(ale_linters#javascript#jscs#GetExecutable(a:buffer))
+    let l:command .= ' --reporter inline --no-colors'
+
+    if !empty(l:jscs_config)
+        let l:command .= ' --config ' . ale#Escape(l:jscs_config)
+    endif
+
+    let l:command .= ' -'
+
+    return l:command
+endfunction
+
+function! ale_linters#javascript#jscs#Handle(buffer, lines) abort
+    " Matches patterns looking like the following
+    "
+    " foobar.js: line 2, col 1, Expected indentation of 1 characters
+    "
+    let l:pattern = '^.*:\s\+line \(\d\+\),\s\+col\s\+\(\d\+\),\s\+\(.*\)$'
+    let l:output = []
+    let l:m = ale#util#GetMatches(a:lines, [l:pattern])
+
+    for l:match in l:m
+        let l:text = l:match[3]
+
+        let l:obj = {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:match[3]
+        \}
+
+        call add(l:output, l:obj)
+    endfor
+
+    return l:output
+endfunction
+
 call ale#linter#Define('javascript', {
 \   'name': 'jscs',
-\   'executable': 'jscs',
-\   'command': 'jscs -r unix -n -',
-\   'callback': 'ale#handlers#unix#HandleAsError',
+\   'executable_callback': 'ale_linters#javascript#jscs#GetExecutable',
+\   'command_callback': 'ale_linters#javascript#jscs#GetCommand',
+\   'callback': 'ale_linters#javascript#jscs#Handle',
 \})
+

ale_linters/javascript/jshint.vim

@@ -1,22 +1,13 @@
 " Author: Chris Kyrouac - https://github.com/fijshion
 " Description: JSHint for Javascript files
 
-let g:ale_javascript_jshint_executable =
-\   get(g:, 'ale_javascript_jshint_executable', 'jshint')
-
-let g:ale_javascript_jshint_use_global =
-\   get(g:, 'ale_javascript_jshint_use_global', 0)
+call ale#Set('javascript_jshint_executable', 'jshint')
+call ale#Set('javascript_jshint_use_global', 0)
 
 function! ale_linters#javascript#jshint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'javascript_jshint_use_global')
-        return ale#Var(a:buffer, 'javascript_jshint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'javascript_jshint', [
     \   'node_modules/.bin/jshint',
-    \   ale#Var(a:buffer, 'javascript_jshint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#javascript#jshint#GetCommand(buffer) abort
@@ -27,11 +18,11 @@ function! ale_linters#javascript#jshint#GetCommand(buffer) abort
     \   get(g:, 'ale_jshint_config_loc', '')
     \)
 
-    let l:command = fnameescape(ale_linters#javascript#jshint#GetExecutable(a:buffer))
+    let l:command = ale#Escape(ale_linters#javascript#jshint#GetExecutable(a:buffer))
     let l:command .= ' --reporter unix --extract auto'
 
     if !empty(l:jshint_config)
-        let l:command .= ' --config ' . fnameescape(l:jshint_config)
+        let l:command .= ' --config ' . ale#Escape(l:jshint_config)
     endif
 
     let l:command .= ' -'

ale_linters/javascript/standard.vim

@@ -1,62 +1,30 @@
 " Author: Ahmed El Gabri <@ahmedelgabri>
 " Description: standardjs for JavaScript files
 
-let g:ale_javascript_standard_executable =
-\   get(g:, 'ale_javascript_standard_executable', 'standard')
-
-let g:ale_javascript_standard_options =
-\   get(g:, 'ale_javascript_standard_options', '')
-
-let g:ale_javascript_standard_use_global =
-\   get(g:, 'ale_javascript_standard_use_global', 0)
+call ale#Set('javascript_standard_executable', 'standard')
+call ale#Set('javascript_standard_use_global', 0)
+call ale#Set('javascript_standard_options', '')
 
 function! ale_linters#javascript#standard#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'javascript_standard_use_global')
-        return ale#Var(a:buffer, 'javascript_standard_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'javascript_standard', [
+    \   'node_modules/standard/bin/cmd.js',
     \   'node_modules/.bin/standard',
-    \   ale#Var(a:buffer, 'javascript_standard_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#javascript#standard#GetCommand(buffer) abort
-    return fnameescape(ale_linters#javascript#standard#GetExecutable(a:buffer))
-    \   . ' ' . ale#Var(a:buffer, 'javascript_standard_options')
+    let l:executable = ale_linters#javascript#standard#GetExecutable(a:buffer)
+    let l:options = ale#Var(a:buffer, 'javascript_standard_options')
+
+    return ale#node#Executable(a:buffer, l:executable)
+    \   . (!empty(l:options) ? ' ' . l:options : '')
     \   . ' --stdin %s'
 endfunction
 
-function! ale_linters#javascript#standard#Handle(buffer, lines) abort
-    " Matches patterns line the following:
-    "
-    " /path/to/some-filename.js:47:14: Strings must use singlequote.
-    " /path/to/some-filename.js:56:41: Expected indentation of 2 spaces but found 4.
-    " /path/to/some-filename.js:13:3: Parsing error: Unexpected token
-    let l:pattern = '^.*:\(\d\+\):\(\d\+\): \(.\+\)$'
-    let l:output = []
-
-    for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        let l:type = 'Error'
-        let l:text = l:match[3]
-
-        call add(l:output, {
-        \   'bufnr': a:buffer,
-        \   'lnum': l:match[1] + 0,
-        \   'col': l:match[2] + 0,
-        \   'text': l:text,
-        \   'type': 'E',
-        \})
-    endfor
-
-    return l:output
-endfunction
-
+" standard uses eslint and the output format is the same
 call ale#linter#Define('javascript', {
 \   'name': 'standard',
 \   'executable_callback': 'ale_linters#javascript#standard#GetExecutable',
 \   'command_callback': 'ale_linters#javascript#standard#GetCommand',
-\   'callback': 'ale_linters#javascript#standard#Handle',
+\   'callback': 'ale#handlers#eslint#Handle',
 \})
-

ale_linters/javascript/xo.vim

@@ -1,41 +1,26 @@
 " Author: Daniel Lupu <lupu.daniel.f@gmail.com>
 " Description: xo for JavaScript files
 
-let g:ale_javascript_xo_executable =
-\   get(g:, 'ale_javascript_xo_executable', 'xo')
-
-let g:ale_javascript_xo_options =
-\   get(g:, 'ale_javascript_xo_options', '')
-
-let g:ale_javascript_xo_use_global =
-\   get(g:, 'ale_javascript_xo_use_global', 0)
+call ale#Set('javascript_xo_executable', 'xo')
+call ale#Set('javascript_xo_use_global', 0)
+call ale#Set('javascript_xo_options', '')
 
 function! ale_linters#javascript#xo#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'javascript_xo_use_global')
-        return ale#Var(a:buffer, 'javascript_xo_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'javascript_xo', [
     \   'node_modules/.bin/xo',
-    \   ale#Var(a:buffer, 'javascript_xo_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#javascript#xo#GetCommand(buffer) abort
-    return fnameescape(ale_linters#javascript#xo#GetExecutable(a:buffer))
+    return ale#Escape(ale_linters#javascript#xo#GetExecutable(a:buffer))
     \   . ' ' . ale#Var(a:buffer, 'javascript_xo_options')
     \   . ' --reporter unix --stdin --stdin-filename %s'
 endfunction
 
-function! ale_linters#javascript#xo#Handle(buffer, lines) abort
-    " xo uses eslint and the output format is the same
-    return ale_linters#javascript#eslint#Handle(a:buffer, a:lines)
-endfunction
-
+" xo uses eslint and the output format is the same
 call ale#linter#Define('javascript', {
 \   'name': 'xo',
 \   'executable_callback': 'ale_linters#javascript#xo#GetExecutable',
 \   'command_callback': 'ale_linters#javascript#xo#GetCommand',
-\   'callback': 'ale_linters#javascript#xo#Handle',
+\   'callback': 'ale#handlers#eslint#Handle',
 \})

ale_linters/kotlin/kotlinc.vim

@@ -9,20 +9,57 @@ let g:ale_kotlin_kotlinc_sourcepath = get(g:, 'ale_kotlin_kotlinc_sourcepath', '
 let g:ale_kotlin_kotlinc_use_module_file = get(g:, 'ale_kotlin_kotlinc_use_module_file', 0)
 let g:ale_kotlin_kotlinc_module_filename = get(g:, 'ale_kotlin_kotlinc_module_filename', 'module.xml')
 
-function! ale_linters#kotlin#kotlinc#GetCommand(buffer) abort
+let s:classpath_sep = has('unix') ? ':' : ';'
+
+function! ale_linters#kotlin#kotlinc#GetImportPaths(buffer) abort
+    " exec maven/gradle only if classpath is not set
+    if ale#Var(a:buffer, 'kotlin_kotlinc_classpath') isnot# ''
+        return ''
+    else
+        let l:pom_path = ale#path#FindNearestFile(a:buffer, 'pom.xml')
+        if !empty(l:pom_path) && executable('mvn')
+            return ale#path#CdString(fnamemodify(l:pom_path, ':h'))
+                        \ . 'mvn dependency:build-classpath'
+        endif
+
+        let l:classpath_command = ale#gradle#BuildClasspathCommand(a:buffer)
+        if !empty(l:classpath_command)
+            return l:classpath_command
+        endif
+
+        return ''
+    endif
+endfunction
+
+function! s:BuildClassPathOption(buffer, import_paths) abort
+    " Filter out lines like [INFO], etc.
+    let l:class_paths = filter(a:import_paths[:], 'v:val !~# ''[''')
+    call extend(
+    \   l:class_paths,
+    \   split(ale#Var(a:buffer, 'kotlin_kotlinc_classpath'), s:classpath_sep),
+    \)
+
+    return !empty(l:class_paths)
+    \   ? ' -cp ' . ale#Escape(join(l:class_paths, s:classpath_sep))
+    \   : ''
+endfunction
+
+function! ale_linters#kotlin#kotlinc#GetCommand(buffer, import_paths) abort
     let l:kotlinc_opts = ale#Var(a:buffer, 'kotlin_kotlinc_options')
     let l:command = 'kotlinc '
 
     " If the config file is enabled and readable, source it
     if ale#Var(a:buffer, 'kotlin_kotlinc_enable_config')
-        if filereadable(expand(ale#Var(a:buffer, 'kotlin_kotlinc_config_file'), 1))
-            execute 'source ' . fnameescape(expand(ale#Var(a:buffer, 'kotlin_kotlinc_config_file'), 1))
+        let l:conf = expand(ale#Var(a:buffer, 'kotlin_kotlinc_config_file'), 1)
+
+        if filereadable(l:conf)
+            execute 'source ' . fnameescape(l:conf)
         endif
     endif
 
     " If use module and module file is readable use that and return
     if ale#Var(a:buffer, 'kotlin_kotlinc_use_module_file')
-        let l:module_filename = fnameescape(expand(ale#Var(a:buffer, 'kotlin_kotlinc_module_filename'), 1))
+        let l:module_filename = ale#Escape(expand(ale#Var(a:buffer, 'kotlin_kotlinc_module_filename'), 1))
 
         if filereadable(l:module_filename)
             let l:kotlinc_opts .= ' -module ' . l:module_filename
@@ -33,16 +70,30 @@ function! ale_linters#kotlin#kotlinc#GetCommand(buffer) abort
     endif
 
     " We only get here if not using module or the module file not readable
-    if ale#Var(a:buffer, 'kotlin_kotlinc_classpath') !=# ''
+    if ale#Var(a:buffer, 'kotlin_kotlinc_classpath') isnot# ''
         let l:kotlinc_opts .= ' -cp ' . ale#Var(a:buffer, 'kotlin_kotlinc_classpath')
+    else
+        " get classpath from maven/gradle
+        let l:kotlinc_opts .= s:BuildClassPathOption(a:buffer, a:import_paths)
     endif
 
     let l:fname = ''
-
-    if ale#Var(a:buffer, 'kotlin_kotlinc_sourcepath') !=# ''
+    if ale#Var(a:buffer, 'kotlin_kotlinc_sourcepath') isnot# ''
         let l:fname .= expand(ale#Var(a:buffer, 'kotlin_kotlinc_sourcepath'), 1) . ' '
+    else
+        " Find the src directory for files in this project.
+
+        let l:project_root = ale#gradle#FindProjectRoot(a:buffer)
+        if !empty(l:project_root)
+            let l:src_dir = l:project_root
+        else
+            let l:src_dir = ale#path#FindNearestDirectory(a:buffer, 'src/main/java')
+            \   . ' ' . ale#path#FindNearestDirectory(a:buffer, 'src/main/kotlin')
+        endif
+
+        let l:fname .= expand(l:src_dir, 1) . ' '
     endif
-    let l:fname .= shellescape(expand('#' . a:buffer . ':p'))
+    let l:fname .= ale#Escape(expand('#' . a:buffer . ':p'))
     let l:command .= l:kotlinc_opts . ' ' . l:fname
 
     return l:command
@@ -70,10 +121,10 @@ function! ale_linters#kotlin#kotlinc#Handle(buffer, lines) abort
         let l:curbuf_abspath = expand('#' . a:buffer . ':p')
 
         " Skip if file is not loaded
-        if l:buf_abspath !=# l:curbuf_abspath
+        if l:buf_abspath isnot# l:curbuf_abspath
             continue
         endif
-        let l:type_marker_str = l:type ==# 'warning' ? 'W' : 'E'
+        let l:type_marker_str = l:type is# 'warning' ? 'W' : 'E'
 
         call add(l:output, {
         \   'lnum': l:line,
@@ -94,10 +145,10 @@ function! ale_linters#kotlin#kotlinc#Handle(buffer, lines) abort
         let l:type = l:match[1]
         let l:text = l:match[2]
 
-        let l:type_marker_str = l:type ==# 'warning' || l:type ==# 'info' ? 'W' : 'E'
+        let l:type_marker_str = l:type is# 'warning' || l:type is# 'info' ? 'W' : 'E'
 
         call add(l:output, {
-        \   'lnum': -1,
+        \   'lnum': 1,
         \   'text': l:text,
         \   'type': l:type_marker_str,
         \})
@@ -108,9 +159,12 @@ endfunction
 
 call ale#linter#Define('kotlin', {
 \   'name': 'kotlinc',
-\   'output_stream': 'stderr',
 \   'executable': 'kotlinc',
-\   'command_callback': 'ale_linters#kotlin#kotlinc#GetCommand',
+\   'command_chain': [
+\       {'callback': 'ale_linters#kotlin#kotlinc#GetImportPaths', 'output_stream': 'stdout'},
+\       {'callback': 'ale_linters#kotlin#kotlinc#GetCommand', 'output_stream': 'stderr'},
+\   ],
 \   'callback': 'ale_linters#kotlin#kotlinc#Handle',
 \   'lint_file': 1,
 \})
+

ale_linters/kotlin/ktlint.vim

@@ -0,0 +1,54 @@
+" Author: Francis Agyapong <francisagyapong2@gmail.com>
+" Description: Lint kotlin files using ktlint
+
+call ale#Set('kotlin_ktlint_executable', 'ktlint')
+call ale#Set('kotlin_ktlint_rulesets', [])
+call ale#Set('kotlin_ktlint_format', 0)
+
+
+function! ale_linters#kotlin#ktlint#GetCommand(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'kotlin_ktlint_executable')
+    let l:file_path = expand('#' . a:buffer . ':p')
+    let l:options = ''
+
+    " Formmatted content written to original file, not sure how to handle
+    " if ale#Var(a:buffer, 'kotlin_ktlint_format')
+    "     let l:options = l:options . ' --format'
+    " endif
+
+    for l:ruleset in ale#Var(a:buffer, 'kotlin_ktlint_rulesets')
+        let l:options = l:options . ' --ruleset ' . l:ruleset
+    endfor
+
+    return l:executable . ' ' . l:options . ' ' . l:file_path
+endfunction
+
+function! ale_linters#kotlin#ktlint#Handle(buffer, lines) abort
+    let l:message_pattern = '^\(.*\):\([0-9]\+\):\([0-9]\+\):\s\+\(.*\)'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:message_pattern)
+        let l:line = l:match[2] + 0
+        let l:column = l:match[3] + 0
+        let l:text = l:match[4]
+
+        let l:type = l:text =~? 'not a valid kotlin file' ? 'E' : 'W'
+
+        call add(l:output, {
+        \   'lnum': l:line,
+        \   'col': l:column,
+        \   'text': l:text,
+        \   'type': l:type
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('kotlin', {
+\   'name': 'ktlint',
+\   'executable': 'ktlint',
+\   'command_callback': 'ale_linters#kotlin#ktlint#GetCommand',
+\   'callback': 'ale_linters#kotlin#ktlint#Handle',
+\   'lint_file': 1
+\})

ale_linters/lua/luacheck.vim

@@ -12,7 +12,7 @@ function! ale_linters#lua#luacheck#GetExecutable(buffer) abort
 endfunction
 
 function! ale_linters#lua#luacheck#GetCommand(buffer) abort
-    return ale_linters#lua#luacheck#GetExecutable(a:buffer)
+    return ale#Escape(ale_linters#lua#luacheck#GetExecutable(a:buffer))
     \   . ' ' . ale#Var(a:buffer, 'lua_luacheck_options')
     \   . ' --formatter plain --codes --filename %s -'
 endfunction
@@ -22,14 +22,14 @@ function! ale_linters#lua#luacheck#Handle(buffer, lines) abort
     "
     " artal.lua:159:17: (W111) shadowing definition of loop variable 'i' on line 106
     " artal.lua:182:7: (W213) unused loop variable 'i'
-    let l:pattern = '^.*:\(\d\+\):\(\d\+\): (\([WE]\)\d\+) \(.\+\)$'
+    let l:pattern = '^.*:\(\d\+\):\(\d\+\): (\([WE]\)\(\d\+\)) \(.\+\)$'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         call add(l:output, {
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
-        \   'text': l:match[4],
+        \   'text': l:match[3] . l:match[4] . ': ' . l:match[5],
         \   'type': l:match[3],
         \})
     endfor

ale_linters/matlab/mlint.vim

@@ -30,7 +30,7 @@ function! ale_linters#matlab#mlint#Handle(buffer, lines) abort
 
         " Suppress erroneous waring about filename
         " TODO: Enable this error when copying filename is supported
-        if l:code ==# 'FNDEF'
+        if l:code is# 'FNDEF'
             continue
         endif
 

ale_linters/nim/nimcheck.vim

@@ -12,7 +12,7 @@ function! ale_linters#nim#nimcheck#Handle(buffer, lines) abort
         "       module names.
 
         let l:temp_buffer_filename = fnamemodify(l:match[1], ':p:t')
-        if l:buffer_filename !=# '' && l:temp_buffer_filename !=# l:buffer_filename
+        if l:buffer_filename isnot# '' && l:temp_buffer_filename isnot# l:buffer_filename
             continue
         endif
 
@@ -26,7 +26,7 @@ function! ale_linters#nim#nimcheck#Handle(buffer, lines) abort
 
         if len(l:textmatch) > 0
             let l:errortype = l:textmatch[1]
-            if l:errortype ==# 'Error'
+            if l:errortype is# 'Error'
                 let l:type = 'E'
             endif
         endif
@@ -44,10 +44,7 @@ endfunction
 
 
 function! ale_linters#nim#nimcheck#GetCommand(buffer) abort
-    let l:directory = fnameescape(fnamemodify(bufname(a:buffer), ':p:h'))
-
-    return 'nim check --path:' . l:directory
-    \   . ' --threads:on --verbosity:0 --colors:off --listFullPaths %t'
+    return 'nim check --verbosity:0 --colors:off --listFullPaths %s'
 endfunction
 
 
@@ -56,5 +53,6 @@ call ale#linter#Define('nim', {
 \    'executable': 'nim',
 \    'output_stream': 'both',
 \    'command_callback': 'ale_linters#nim#nimcheck#GetCommand',
-\    'callback': 'ale_linters#nim#nimcheck#Handle'
+\    'callback': 'ale_linters#nim#nimcheck#Handle',
+\    'lint_file': 1,
 \})

ale_linters/objc/clang.vim

@@ -0,0 +1,23 @@
+" Author: Bang Lee <https://github.com/Qusic>
+" Description: clang linter for objc files
+
+" Set this option to change the Clang options for warnings for ObjC.
+if !exists('g:ale_objc_clang_options')
+    let g:ale_objc_clang_options = '-std=c11 -Wall'
+endif
+
+function! ale_linters#objc#clang#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
+    return 'clang -S -x objective-c -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . ale#Var(a:buffer, 'objc_clang_options') . ' -'
+endfunction
+
+call ale#linter#Define('objc', {
+\   'name': 'clang',
+\   'output_stream': 'stderr',
+\   'executable': 'clang',
+\   'command_callback': 'ale_linters#objc#clang#GetCommand',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\})

ale_linters/objcpp/clang.vim

@@ -0,0 +1,23 @@
+" Author: Bang Lee <https://github.com/Qusic>
+" Description: clang linter for objcpp files
+
+" Set this option to change the Clang options for warnings for ObjCPP.
+if !exists('g:ale_objcpp_clang_options')
+    let g:ale_objcpp_clang_options = '-std=c++14 -Wall'
+endif
+
+function! ale_linters#objcpp#clang#GetCommand(buffer) abort
+    " -iquote with the directory the file is in makes #include work for
+    "  headers in the same directory.
+    return 'clang++ -S -x objective-c++ -fsyntax-only '
+    \   . '-iquote ' . ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
+    \   . ' ' . ale#Var(a:buffer, 'objcpp_clang_options') . ' -'
+endfunction
+
+call ale#linter#Define('objcpp', {
+\   'name': 'clang',
+\   'output_stream': 'stderr',
+\   'executable': 'clang++',
+\   'command_callback': 'ale_linters#objcpp#clang#GetCommand',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\})

ale_linters/perl/perl.vim

@@ -5,7 +5,7 @@ let g:ale_perl_perl_executable =
 \   get(g:, 'ale_perl_perl_executable', 'perl')
 
 let g:ale_perl_perl_options =
-\   get(g:, 'ale_perl_perl_options', '-X -c -Mwarnings -Ilib')
+\   get(g:, 'ale_perl_perl_options', '-c -Mwarnings -Ilib')
 
 function! ale_linters#perl#perl#GetExecutable(buffer) abort
     return ale#Var(a:buffer, 'perl_perl_executable')
@@ -17,20 +17,33 @@ function! ale_linters#perl#perl#GetCommand(buffer) abort
     \   . ' %t'
 endfunction
 
+let s:begin_failed_skip_pattern = '\v' . join([
+\   '^Compilation failed in require',
+\   '^Can''t locate',
+\], '|')
+
 function! ale_linters#perl#perl#Handle(buffer, lines) abort
     let l:pattern = '\(.\+\) at \(.\+\) line \(\d\+\)'
     let l:output = []
+    let l:basename = expand('#' . a:buffer . ':t')
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         let l:line = l:match[3]
         let l:text = l:match[1]
         let l:type = 'E'
 
-        call add(l:output, {
-        \   'lnum': l:line,
-        \   'text': l:text,
-        \   'type': l:type,
-        \})
+        if ale#path#IsBufferPath(a:buffer, l:match[2])
+        \ && (
+        \   l:text isnot# 'BEGIN failed--compilation aborted'
+        \   || empty(l:output)
+        \   || match(l:output[-1].text, s:begin_failed_skip_pattern) < 0
+        \ )
+            call add(l:output, {
+            \   'lnum': l:line,
+            \   'text': l:text,
+            \   'type': l:type,
+            \})
+        endif
     endfor
 
     return l:output

ale_linters/perl/perlcritic.vim

@@ -1,14 +1,66 @@
-" Author: Vincent Lequertier <https://github.com/SkySymbol>
+" Author: Vincent Lequertier <https://github.com/SkySymbol>, Chris Weyl <cweyl@alumni.drew.edu>
 " Description: This file adds support for checking perl with perl critic
 
+let g:ale_perl_perlcritic_executable =
+\   get(g:, 'ale_perl_perlcritic_executable', 'perlcritic')
+
+let g:ale_perl_perlcritic_profile =
+\   get(g:, 'ale_perl_perlcritic_profile', '.perlcriticrc')
+
+let g:ale_perl_perlcritic_options =
+\   get(g:, 'ale_perl_perlcritic_options', '')
+
+let g:ale_perl_perlcritic_showrules =
+\   get(g:, 'ale_perl_perlcritic_showrules', 0)
+
+function! ale_linters#perl#perlcritic#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'perl_perlcritic_executable')
+endfunction
+
+function! ale_linters#perl#perlcritic#GetProfile(buffer) abort
+
+    " first see if we've been overridden
+    let l:profile = ale#Var(a:buffer, 'perl_perlcritic_profile')
+    if l:profile is? ''
+        return ''
+    endif
+
+    " otherwise, iterate upwards to find it
+    return ale#path#FindNearestFile(a:buffer, l:profile)
+endfunction
+
+function! ale_linters#perl#perlcritic#GetCommand(buffer) abort
+    let l:critic_verbosity = '%l:%c %m\n'
+    if ale#Var(a:buffer, 'perl_perlcritic_showrules')
+        let l:critic_verbosity = '%l:%c %m [%p]\n'
+    endif
+
+    let l:profile = ale_linters#perl#perlcritic#GetProfile(a:buffer)
+    let l:options = ale#Var(a:buffer, 'perl_perlcritic_options')
+
+    let l:command = ale#Escape(ale_linters#perl#perlcritic#GetExecutable(a:buffer))
+    \   . " --verbose '". l:critic_verbosity . "' --nocolor"
+
+    if l:profile isnot? ''
+        let l:command .= ' --profile ' . ale#Escape(l:profile)
+    endif
+    if l:options isnot? ''
+        let l:command .= ' ' . l:options
+    endif
+
+    return l:command
+endfunction
+
+
 function! ale_linters#perl#perlcritic#Handle(buffer, lines) abort
-    let l:pattern = '\(.\+\) at \(.\+\) line \(\d\+\)'
+    let l:pattern = '\(\d\+\):\(\d\+\) \(.\+\)'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         call add(l:output, {
-        \   'text': l:match[1],
-        \   'lnum': l:match[3],
+        \   'lnum': l:match[1],
+        \   'col': l:match[2],
+        \   'text': l:match[3],
         \})
     endfor
 
@@ -17,8 +69,8 @@ endfunction
 
 call ale#linter#Define('perl', {
 \   'name': 'perlcritic',
-\   'executable': 'perlcritic',
 \   'output_stream': 'stdout',
-\   'command': 'perlcritic --verbose 3 --nocolor',
+\   'executable_callback': 'ale_linters#perl#perlcritic#GetExecutable',
+\   'command_callback': 'ale_linters#perl#perlcritic#GetCommand',
 \   'callback': 'ale_linters#perl#perlcritic#Handle',
 \})

ale_linters/php/langserver.vim

@@ -0,0 +1,34 @@
+" Author: Eric Stern <eric@ericstern.com>
+" Description: PHP Language server integration for ALE
+
+call ale#Set('php_langserver_executable', 'php-language-server.php')
+call ale#Set('php_langserver_use_global', 0)
+
+function! ale_linters#php#langserver#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'php_langserver', [
+    \   'vendor/bin/php-language-server.php',
+    \])
+endfunction
+
+function! ale_linters#php#langserver#GetCommand(buffer) abort
+    return 'php ' . ale#Escape(ale_linters#php#langserver#GetExecutable(a:buffer))
+endfunction
+
+function! ale_linters#php#langserver#GetLanguage(buffer) abort
+    return 'php'
+endfunction
+
+function! ale_linters#php#langserver#GetProjectRoot(buffer) abort
+    let l:git_path = ale#path#FindNearestDirectory(a:buffer, '.git')
+
+    return !empty(l:git_path) ? fnamemodify(l:git_path, ':h:h') : ''
+endfunction
+
+call ale#linter#Define('php', {
+\   'name': 'langserver',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#php#langserver#GetExecutable',
+\   'command_callback': 'ale_linters#php#langserver#GetCommand',
+\   'language_callback': 'ale_linters#php#langserver#GetLanguage',
+\   'project_root_callback': 'ale_linters#php#langserver#GetProjectRoot',
+\})

ale_linters/php/php.vim

@@ -4,17 +4,23 @@
 function! ale_linters#php#php#Handle(buffer, lines) abort
     " Matches patterns like the following:
     "
-    " PHP Parse error:  syntax error, unexpected ';', expecting ']' in - on line 15
-    let l:pattern = '\vPHP %(Fatal|Parse) error:\s+(.+unexpected ''(.+)%(expecting.+)@<!''.*|.+) in - on line (\d+)'
-
+    " Parse error:  syntax error, unexpected ';', expecting ']' in - on line 15
+    let l:pattern = '\v^%(Fatal|Parse) error:\s+(.+unexpected ''(.+)%(expecting.+)@<!''.*|.+) in - on line (\d+)'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        call add(l:output, {
+        let l:col = empty(l:match[2]) ? 0 : stridx(getline(l:match[3]), l:match[2]) + 1
+        let l:obj = {
         \   'lnum': l:match[3] + 0,
-        \   'col': empty(l:match[2]) ? 0 : stridx(getline(l:match[3]), l:match[2]) + 1,
+        \   'col': l:col,
         \   'text': l:match[1],
-        \})
+        \}
+
+        if l:col != 0
+            let l:obj.end_col = l:col + strlen(l:match[2]) - 1
+        endif
+
+        call add(l:output, l:obj)
     endfor
 
     return l:output
@@ -23,7 +29,7 @@ endfunction
 call ale#linter#Define('php', {
 \   'name': 'php',
 \   'executable': 'php',
-\   'output_stream': 'both',
-\   'command': 'php -l -d display_errors=1 --',
+\   'output_stream': 'stdout',
+\   'command': 'php -l -d error_reporting=E_ALL -d display_errors=1 --',
 \   'callback': 'ale_linters#php#php#Handle',
 \})

ale_linters/php/phpcs.vim

@@ -1,15 +1,28 @@
-" Author: jwilliams108 <https://github.com/jwilliams108>
+" Author: jwilliams108 <https://github.com/jwilliams108>, Eric Stern <https://github.com/firehed>
 " Description: phpcs for PHP files
 
 let g:ale_php_phpcs_standard = get(g:, 'ale_php_phpcs_standard', '')
 
+call ale#Set('php_phpcs_executable', 'phpcs')
+call ale#Set('php_phpcs_use_global', 0)
+
+function! ale_linters#php#phpcs#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'php_phpcs', [
+    \   'vendor/bin/phpcs',
+    \   'phpcs'
+    \])
+endfunction
+
 function! ale_linters#php#phpcs#GetCommand(buffer) abort
+    let l:executable = ale_linters#php#phpcs#GetExecutable(a:buffer)
+
     let l:standard = ale#Var(a:buffer, 'php_phpcs_standard')
     let l:standard_option = !empty(l:standard)
     \   ? '--standard=' . l:standard
     \   : ''
 
-    return 'phpcs -s --report=emacs --stdin-path=%s ' . l:standard_option
+    return ale#Escape(l:executable)
+    \   . ' -s --report=emacs --stdin-path=%s ' . l:standard_option
 endfunction
 
 function! ale_linters#php#phpcs#Handle(buffer, lines) abort
@@ -27,7 +40,7 @@ function! ale_linters#php#phpcs#Handle(buffer, lines) abort
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
         \   'text': l:text,
-        \   'type': l:type ==# 'error' ? 'E' : 'W',
+        \   'type': l:type is# 'error' ? 'E' : 'W',
         \})
     endfor
 
@@ -36,7 +49,7 @@ endfunction
 
 call ale#linter#Define('php', {
 \   'name': 'phpcs',
-\   'executable': 'phpcs',
+\   'executable_callback': 'ale_linters#php#phpcs#GetExecutable',
 \   'command_callback': 'ale_linters#php#phpcs#GetCommand',
 \   'callback': 'ale_linters#php#phpcs#Handle',
 \})

ale_linters/php/phpstan.vim

@@ -0,0 +1,46 @@
+" Author: medains <https://github.com/medains>, ardis <https://github.com/ardisdreelath>
+" Description: phpstan for PHP files
+
+" Set to change the ruleset
+let g:ale_php_phpstan_executable = get(g:, 'ale_php_phpstan_executable', 'phpstan')
+let g:ale_php_phpstan_level = get(g:, 'ale_php_phpstan_level', '4')
+
+function! ale_linters#php#phpstan#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'php_phpstan_executable')
+endfunction
+
+function! ale_linters#php#phpstan#GetCommand(buffer) abort
+    let l:executable = ale_linters#php#phpstan#GetExecutable(a:buffer)
+
+    return ale#Escape(l:executable)
+    \   . ' analyze -l'
+    \   . ale#Var(a:buffer, 'php_phpstan_level')
+    \   . ' --errorFormat raw'
+    \   . ' %s'
+endfunction
+
+function! ale_linters#php#phpstan#Handle(buffer, lines) abort
+    " Matches against lines like the following:
+    "
+    " filename.php:15:message
+    " C:\folder\filename.php:15:message
+    let l:pattern = '^\([a-zA-Z]:\)\?[^:]\+:\(\d\+\):\(.*\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[2] + 0,
+        \   'text': l:match[3],
+        \   'type': 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('php', {
+\   'name': 'phpstan',
+\   'executable_callback': 'ale_linters#php#phpstan#GetExecutable',
+\   'command_callback': 'ale_linters#php#phpstan#GetCommand',
+\   'callback': 'ale_linters#php#phpstan#Handle',
+\})

ale_linters/pug/puglint.vim

@@ -1,10 +1,48 @@
 " Author: w0rp - <devw0rp@gmail.com>
 " Description: pug-lint for checking Pug/Jade files.
 
+call ale#Set('pug_puglint_options', '')
+call ale#Set('pug_puglint_executable', 'pug-lint')
+call ale#Set('pug_puglint_use_global', 0)
+
+function! ale_linters#pug#puglint#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'pug_puglint', [
+    \   'node_modules/.bin/pug-lint',
+    \])
+endfunction
+
+function! s:FindConfig(buffer) abort
+    for l:filename in [
+    \   '.pug-lintrc',
+    \   '.pug-lintrc.js',
+    \   '.pug-lintrc.json',
+    \   'package.json',
+    \]
+        let l:config = ale#path#FindNearestFile(a:buffer, l:filename)
+
+        if !empty(l:config)
+            return l:config
+        endif
+    endfor
+
+    return ''
+endfunction
+
+function! ale_linters#pug#puglint#GetCommand(buffer) abort
+    let l:executable = ale_linters#pug#puglint#GetExecutable(a:buffer)
+    let l:options = ale#Var(a:buffer, 'pug_puglint_options')
+    let l:config = s:FindConfig(a:buffer)
+
+    return ale#Escape(l:executable)
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . (!empty(l:config) ? ' -c ' . ale#Escape(l:config) : '')
+    \   . ' -r inline %t'
+endfunction
+
 call ale#linter#Define('pug', {
 \   'name': 'puglint',
-\   'executable': 'pug-lint',
+\   'executable_callback': 'ale_linters#pug#puglint#GetExecutable',
 \   'output_stream': 'stderr',
-\   'command': 'pug-lint -r inline %t',
+\   'command_callback': 'ale_linters#pug#puglint#GetCommand',
 \   'callback': 'ale#handlers#unix#HandleAsError',
 \})

ale_linters/python/flake8.vim

@@ -19,16 +19,8 @@ function! s:UsingModule(buffer) abort
 endfunction
 
 function! ale_linters#python#flake8#GetExecutable(buffer) abort
-    if !s:UsingModule(a:buffer) && !ale#Var(a:buffer, 'python_flake8_use_global')
-        let l:virtualenv = ale#python#FindVirtualenv(a:buffer)
-
-        if !empty(l:virtualenv)
-            let l:ve_flake8 = l:virtualenv . '/bin/flake8'
-
-            if executable(l:ve_flake8)
-                return l:ve_flake8
-            endif
-        endif
+    if !s:UsingModule(a:buffer)
+        return ale#python#FindExecutable(a:buffer, 'python_flake8', ['flake8'])
     endif
 
     return ale#Var(a:buffer, 'python_flake8_executable')
@@ -48,7 +40,7 @@ function! ale_linters#python#flake8#VersionCheck(buffer) abort
         return ''
     endif
 
-    let l:executable = fnameescape(ale_linters#python#flake8#GetExecutable(a:buffer))
+    let l:executable = ale#Escape(ale_linters#python#flake8#GetExecutable(a:buffer))
     let l:module_string = s:UsingModule(a:buffer) ? ' -m flake8' : ''
 
     return l:executable . l:module_string . ' --version'
@@ -89,17 +81,85 @@ function! ale_linters#python#flake8#GetCommand(buffer, version_output) abort
 
     let l:options = ale#Var(a:buffer, 'python_flake8_options')
 
-    return fnameescape(ale_linters#python#flake8#GetExecutable(a:buffer))
+    return ale#Escape(ale_linters#python#flake8#GetExecutable(a:buffer))
     \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' --format=default'
     \   . l:display_name_args . ' -'
 endfunction
 
+let s:end_col_pattern_map = {
+\   'F405': '\(.\+\) may be undefined',
+\   'F821': 'undefined name ''\([^'']\+\)''',
+\   'F999': '^''\([^'']\+\)''',
+\   'F841': 'local variable ''\([^'']\+\)''',
+\}
+
+function! ale_linters#python#flake8#Handle(buffer, lines) abort
+    for l:line in a:lines[:10]
+        if match(l:line, '^Traceback') >= 0
+            return [{
+            \   'lnum': 1,
+            \   'text': 'An exception was thrown. See :ALEDetail',
+            \   'detail': join(a:lines, "\n"),
+            \}]
+        endif
+    endfor
+
+    " Matches patterns line the following:
+    "
+    " Matches patterns line the following:
+    "
+    " stdin:6:6: E111 indentation is not a multiple of four
+    let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):?(\d+)?: ([[:alnum:]]+) (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:code = l:match[3]
+
+        if (l:code is# 'W291' || l:code is# 'W293')
+        \ && !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
+            " Skip warnings for trailing whitespace if the option is off.
+            continue
+        endif
+
+        let l:item = {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:code . ': ' . l:match[4],
+        \   'type': 'W',
+        \}
+
+        if l:code[:0] is# 'F' || l:code is# 'E999'
+            let l:item.type = 'E'
+        elseif l:code[:0] is# 'E'
+            let l:item.type = 'E'
+            let l:item.sub_type = 'style'
+        elseif l:code[:0] is# 'W'
+            let l:item.sub_type = 'style'
+        endif
+
+        let l:end_col_pattern = get(s:end_col_pattern_map, l:code, '')
+
+        if !empty(l:end_col_pattern)
+            let l:end_col_match = matchlist(l:match[4], l:end_col_pattern)
+
+            if !empty(l:end_col_match)
+                let l:item.end_col = l:item.col + len(l:end_col_match[1]) - 1
+            endif
+        endif
+
+        call add(l:output, l:item)
+    endfor
+
+    return l:output
+endfunction
+
 call ale#linter#Define('python', {
 \   'name': 'flake8',
 \   'executable_callback': 'ale_linters#python#flake8#GetExecutable',
 \   'command_chain': [
 \       {'callback': 'ale_linters#python#flake8#VersionCheck'},
-\       {'callback': 'ale_linters#python#flake8#GetCommand'},
+\       {'callback': 'ale_linters#python#flake8#GetCommand', 'output_stream': 'both'},
 \   ],
-\   'callback': 'ale#handlers#python#HandlePEP8Format',
+\   'callback': 'ale_linters#python#flake8#Handle',
 \})

ale_linters/python/mypy.vim

@@ -7,36 +7,33 @@ let g:ale_python_mypy_options = get(g:, 'ale_python_mypy_options', '')
 let g:ale_python_mypy_use_global = get(g:, 'ale_python_mypy_use_global', 0)
 
 function! ale_linters#python#mypy#GetExecutable(buffer) abort
-    if !ale#Var(a:buffer, 'python_mypy_use_global')
-        let l:virtualenv = ale#python#FindVirtualenv(a:buffer)
+    return ale#python#FindExecutable(a:buffer, 'python_mypy', ['mypy'])
+endfunction
 
-        if !empty(l:virtualenv)
-            let l:ve_mypy = l:virtualenv . '/bin/mypy'
+" The directory to change to before running mypy
+function! s:GetDir(buffer) abort
+    let l:project_root = ale#python#FindProjectRoot(a:buffer)
 
-            if executable(l:ve_mypy)
-                return l:ve_mypy
-            endif
-        endif
-    endif
-
-    return ale#Var(a:buffer, 'python_mypy_executable')
+    return !empty(l:project_root)
+    \   ? l:project_root
+    \   : expand('#' . a:buffer . ':p:h')
 endfunction
 
 function! ale_linters#python#mypy#GetCommand(buffer) abort
-    let l:project_root = ale#python#FindProjectRoot(a:buffer)
-    let l:cd_command = !empty(l:project_root)
-    \   ? ale#path#CdString(l:project_root)
-    \   : ''
+    let l:dir = s:GetDir(a:buffer)
     let l:executable = ale_linters#python#mypy#GetExecutable(a:buffer)
 
-    return l:cd_command
-    \   . fnameescape(l:executable)
+    " We have to always switch to an explicit directory for a command so
+    " we can know with certainty the base path for the 'filename' keys below.
+    return ale#path#CdString(l:dir)
+    \   . ale#Escape(l:executable)
     \   . ' --show-column-numbers '
     \   . ale#Var(a:buffer, 'python_mypy_options')
-    \   . ' %s'
+    \   . ' --shadow-file %s %t %s'
 endfunction
 
 function! ale_linters#python#mypy#Handle(buffer, lines) abort
+    let l:dir = s:GetDir(a:buffer)
     " Look for lines like the following:
     "
     " file.py:4: error: No library stub file for module 'django.db'
@@ -46,17 +43,13 @@ function! ale_linters#python#mypy#Handle(buffer, lines) abort
     " file.py:4: note: (Stub files are from https://github.com/python/typeshed)
     let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):?(\d+)?: (error|warning): (.+)$'
     let l:output = []
-    let l:buffer_filename = expand('#' . a:buffer . ':p')
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        if l:buffer_filename[-len(l:match[1]):] !=# l:match[1]
-            continue
-        endif
-
         call add(l:output, {
+        \   'filename': ale#path#GetAbsPath(l:dir, l:match[1]),
         \   'lnum': l:match[2] + 0,
         \   'col': l:match[3] + 0,
-        \   'type': l:match[4] =~# 'error' ? 'E' : 'W',
+        \   'type': l:match[4] is# 'error' ? 'E' : 'W',
         \   'text': l:match[5],
         \})
     endfor
@@ -69,5 +62,4 @@ call ale#linter#Define('python', {
 \   'executable_callback': 'ale_linters#python#mypy#GetExecutable',
 \   'command_callback': 'ale_linters#python#mypy#GetCommand',
 \   'callback': 'ale_linters#python#mypy#Handle',
-\   'lint_file': 1,
 \})

ale_linters/python/pycodestyle.vim

@@ -0,0 +1,42 @@
+" Author: Michael Thiesen <micthiesen@gmail.com>
+" Description: pycodestyle linting for python files
+
+call ale#Set('python_pycodestyle_executable', 'pycodestyle')
+call ale#Set('python_pycodestyle_options', '')
+call ale#Set('python_pycodestyle_use_global', 0)
+
+function! ale_linters#python#pycodestyle#GetExecutable(buffer) abort
+    return ale#python#FindExecutable(a:buffer, 'python_pycodestyle', ['pycodestyle'])
+endfunction
+
+function! ale_linters#python#pycodestyle#GetCommand(buffer) abort
+    return ale#Escape(ale_linters#python#pycodestyle#GetExecutable(a:buffer))
+    \   . ' '
+    \   . ale#Var(a:buffer, 'python_pycodestyle_options')
+    \   . ' -'
+endfunction
+
+function! ale_linters#python#pycodestyle#Handle(buffer, lines) abort
+    let l:pattern = '\v^(\S*):(\d*):(\d*): ((([EW])\d+) .*)$'
+    let l:output = []
+
+    " lines are formatted as follows:
+    " file.py:21:26: W291 trailing whitespace
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'type': l:match[6],
+        \   'text': l:match[4],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('python', {
+\   'name': 'pycodestyle',
+\   'executable_callback': 'ale_linters#python#pycodestyle#GetExecutable',
+\   'command_callback': 'ale_linters#python#pycodestyle#GetCommand',
+\   'callback': 'ale_linters#python#pycodestyle#Handle',
+\})

ale_linters/python/pylint.vim

@@ -10,32 +10,53 @@ let g:ale_python_pylint_options =
 let g:ale_python_pylint_use_global = get(g:, 'ale_python_pylint_use_global', 0)
 
 function! ale_linters#python#pylint#GetExecutable(buffer) abort
-    if !ale#Var(a:buffer, 'python_pylint_use_global')
-        let l:virtualenv = ale#python#FindVirtualenv(a:buffer)
-
-        if !empty(l:virtualenv)
-            let l:ve_pylint = l:virtualenv . '/bin/pylint'
-
-            if executable(l:ve_pylint)
-                return l:ve_pylint
-            endif
-        endif
-    endif
-
-    return ale#Var(a:buffer, 'python_pylint_executable')
+    return ale#python#FindExecutable(a:buffer, 'python_pylint', ['pylint'])
 endfunction
 
 function! ale_linters#python#pylint#GetCommand(buffer) abort
-    return fnameescape(ale_linters#python#pylint#GetExecutable(a:buffer))
+    return ale#Escape(ale_linters#python#pylint#GetExecutable(a:buffer))
     \   . ' ' . ale#Var(a:buffer, 'python_pylint_options')
     \   . ' --output-format text --msg-template="{path}:{line}:{column}: {msg_id} ({symbol}) {msg}" --reports n'
     \   . ' %s'
 endfunction
 
+function! ale_linters#python#pylint#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    "
+    " test.py:4:4: W0101 (unreachable) Unreachable code
+    let l:pattern = '\v^[^:]+:(\d+):(\d+): ([[:alnum:]]+) \(([^(]*)\) (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        "let l:failed = append(0, l:match)
+        let l:code = l:match[3]
+
+        if (l:code is# 'C0303')
+        \ && !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
+            " Skip warnings for trailing whitespace if the option is off.
+            continue
+        endif
+
+        if l:code is# 'I0011'
+            " Skip 'Locally disabling' message
+             continue
+        endif
+
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 1,
+        \   'text': l:code . ': ' . l:match[5] . ' (' . l:match[4] . ')',
+        \   'type': l:code[:0] is# 'E' ? 'E' : 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
 call ale#linter#Define('python', {
 \   'name': 'pylint',
 \   'executable_callback': 'ale_linters#python#pylint#GetExecutable',
 \   'command_callback': 'ale_linters#python#pylint#GetCommand',
-\   'callback': 'ale#handlers#python#HandlePEP8Format',
+\   'callback': 'ale_linters#python#pylint#Handle',
 \   'lint_file': 1,
 \})

ale_linters/r/lintr.vim

@@ -0,0 +1,15 @@
+" Author: Michel Lang <michellang@gmail.com>, w0rp <devw0rp@gmail.com>
+" Description: This file adds support for checking R code with lintr.
+
+function! ale_linters#r#lintr#GetCommand(buffer) abort
+    return ale#path#BufferCdString(a:buffer)
+    \   . 'Rscript -e ' . ale#Escape('lintr::lint(commandArgs(TRUE))') . ' %t'
+endfunction
+
+call ale#linter#Define('r', {
+\   'name': 'lintr',
+\   'executable': 'Rscript',
+\   'command_callback': 'ale_linters#r#lintr#GetCommand',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\   'output_stream': 'both',
+\})

ale_linters/ruby/brakeman.vim

@@ -5,13 +5,12 @@ let g:ale_ruby_brakeman_options =
 \   get(g:, 'ale_ruby_brakeman_options', '')
 
 function! ale_linters#ruby#brakeman#Handle(buffer, lines) abort
-    let l:result = json_decode(join(a:lines, ''))
-
     let l:output = []
+    let l:json = ale#util#FuzzyJSONDecode(a:lines, {})
 
-    for l:warning in l:result.warnings
+    for l:warning in get(l:json, 'warnings', [])
         " Brakeman always outputs paths relative to the Rails app root
-        let l:rails_root = s:FindRailsRoot(a:buffer)
+        let l:rails_root = ale#ruby#FindRailsRoot(a:buffer)
         let l:warning_file = l:rails_root . '/' . l:warning.file
 
         if !ale#path#IsBufferPath(a:buffer, l:warning_file)
@@ -32,35 +31,15 @@ function! ale_linters#ruby#brakeman#Handle(buffer, lines) abort
 endfunction
 
 function! ale_linters#ruby#brakeman#GetCommand(buffer) abort
-    let l:rails_root = s:FindRailsRoot(a:buffer)
+    let l:rails_root = ale#ruby#FindRailsRoot(a:buffer)
 
-    if l:rails_root ==? ''
+    if l:rails_root is? ''
         return ''
     endif
 
     return 'brakeman -f json -q '
     \    . ale#Var(a:buffer, 'ruby_brakeman_options')
-    \    . ' -p ' . l:rails_root
-endfunction
-
-function! s:FindRailsRoot(buffer) abort
-    " Find the nearest dir contining "app", "db", and "config", and assume it is
-    " the root of a Rails app.
-    for l:name in ['app', 'config', 'db']
-        let l:dir = fnamemodify(
-        \   ale#path#FindNearestDirectory(a:buffer, l:name),
-        \   ':h:h'
-        \)
-
-        if l:dir !=# '.'
-        \&& isdirectory(l:dir . '/app')
-        \&& isdirectory(l:dir . '/config')
-        \&& isdirectory(l:dir . '/db')
-            return l:dir
-        endif
-    endfor
-
-    return ''
+    \    . ' -p ' . ale#Escape(l:rails_root)
 endfunction
 
 call ale#linter#Define('ruby', {

ale_linters/ruby/rails_best_practices.vim

@@ -0,0 +1,53 @@
+" Author: Eddie Lebow https://github.com/elebow
+" Description: rails_best_practices, a code metric tool for rails projects
+
+let g:ale_ruby_rails_best_practices_options =
+\   get(g:, 'ale_ruby_rails_best_practices_options', '')
+
+function! ale_linters#ruby#rails_best_practices#Handle(buffer, lines) abort
+    let l:output = []
+
+    for l:warning in ale#util#FuzzyJSONDecode(a:lines, [])
+        if !ale#path#IsBufferPath(a:buffer, l:warning.filename)
+            continue
+        endif
+
+        call add(l:output, {
+        \    'lnum': l:warning.line_number + 0,
+        \    'type': 'W',
+        \    'text': l:warning.message,
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#ruby#rails_best_practices#GetCommand(buffer) abort
+    let l:executable = ale#handlers#rails_best_practices#GetExecutable(a:buffer)
+    let l:exec_args = l:executable =~? 'bundle$'
+    \   ? ' exec rails_best_practices'
+    \   : ''
+
+    let l:rails_root = ale#ruby#FindRailsRoot(a:buffer)
+
+    if l:rails_root is? ''
+        return ''
+    endif
+
+    let l:output_file = ale#Has('win32') ? '%t ' : '/dev/stdout '
+    let l:cat_file = ale#Has('win32') ? '; type %t' : ''
+
+    return ale#Escape(l:executable) . l:exec_args
+    \    . ' --silent -f json --output-file ' . l:output_file
+    \    . ale#Var(a:buffer, 'ruby_rails_best_practices_options')
+    \    . ale#Escape(l:rails_root)
+    \    . l:cat_file
+endfunction
+
+call ale#linter#Define('ruby', {
+\    'name': 'rails_best_practices',
+\    'executable_callback': 'ale#handlers#rails_best_practices#GetExecutable',
+\    'command_callback': 'ale_linters#ruby#rails_best_practices#GetCommand',
+\    'callback': 'ale_linters#ruby#rails_best_practices#Handle',
+\    'lint_file': 1,
+\})

ale_linters/ruby/reek.vim

@@ -1,22 +1,13 @@
 " Author: Eddie Lebow https://github.com/elebow
 " Description: Reek, a code smell detector for Ruby files
 
-let g:ale_ruby_reek_show_context =
-\   get(g:, 'ale_ruby_reek_show_context', 0)
-
-let g:ale_ruby_reek_show_wiki_link =
-\   get(g:, 'ale_ruby_reek_show_wiki_link', 0)
+call ale#Set('ruby_reek_show_context', 0)
+call ale#Set('ruby_reek_show_wiki_link', 0)
 
 function! ale_linters#ruby#reek#Handle(buffer, lines) abort
-    if len(a:lines) == 0
-        return []
-    endif
-
-    let l:errors = json_decode(a:lines[0])
-
     let l:output = []
 
-    for l:error in l:errors
+    for l:error in ale#util#FuzzyJSONDecode(a:lines, [])
         for l:location in l:error.lines
             call add(l:output, {
             \    'lnum': l:location,

ale_linters/ruby/rubocop.vim

@@ -1,44 +1,60 @@
-" Author: ynonp - https://github.com/ynonp
-" Description: rubocop for Ruby files
+" Author: ynonp - https://github.com/ynonp, Eddie Lebow https://github.com/elebow
+" Description: RuboCop, a code style analyzer for Ruby files
+
+function! ale_linters#ruby#rubocop#GetCommand(buffer) abort
+    let l:executable = ale#handlers#rubocop#GetExecutable(a:buffer)
+    let l:exec_args = l:executable =~? 'bundle$'
+    \   ? ' exec rubocop'
+    \   : ''
+
+    return ale#Escape(l:executable) . l:exec_args
+    \   . ' --format json --force-exclusion '
+    \   . ale#Var(a:buffer, 'ruby_rubocop_options')
+    \   . ' --stdin ' . ale#Escape(expand('#' . a:buffer . ':p'))
+endfunction
 
 function! ale_linters#ruby#rubocop#Handle(buffer, lines) abort
-    " Matches patterns line the following:
-    "
-    " <path>:83:29: C: Prefer single-quoted strings when you don't
-    " need string interpolation or special symbols.
-    let l:pattern = '\v:(\d+):(\d+): (.): (.+)'
+    try
+        let l:errors = json_decode(a:lines[0])
+    catch
+        return []
+    endtry
+
+    if !has_key(l:errors, 'summary')
+    \|| l:errors['summary']['offense_count'] == 0
+    \|| empty(l:errors['files'])
+        return []
+    endif
+
     let l:output = []
 
-    for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        let l:text = l:match[4]
-        let l:type = l:match[3]
-
+    for l:error in l:errors['files'][0]['offenses']
+        let l:start_col = l:error['location']['column'] + 0
         call add(l:output, {
-        \   'lnum': l:match[1] + 0,
-        \   'col': l:match[2] + 0,
-        \   'text': l:text,
-        \   'type': index(['F', 'E'], l:type) != -1 ? 'E' : 'W',
+        \   'lnum': l:error['location']['line'] + 0,
+        \   'col': l:start_col,
+        \   'end_col': l:start_col + l:error['location']['length'] - 1,
+        \   'text': printf('%s [%s]', l:error['message'], l:error['cop_name']),
+        \   'type': ale_linters#ruby#rubocop#GetType(l:error['severity']),
         \})
     endfor
 
     return l:output
 endfunction
 
-function! ale_linters#ruby#rubocop#GetCommand(buffer) abort
-    return 'rubocop --format emacs --force-exclusion '
-    \   . ale#Var(a:buffer, 'ruby_rubocop_options')
-    \   . ' --stdin ' . bufname(a:buffer)
-endfunction
+function! ale_linters#ruby#rubocop#GetType(severity) abort
+    if a:severity is? 'convention'
+    \|| a:severity is? 'warning'
+    \|| a:severity is? 'refactor'
+        return 'W'
+    endif
 
-" Set this option to change Rubocop options.
-if !exists('g:ale_ruby_rubocop_options')
-    " let g:ale_ruby_rubocop_options = '--lint'
-    let g:ale_ruby_rubocop_options = ''
-endif
+    return 'E'
+endfunction
 
 call ale#linter#Define('ruby', {
 \   'name': 'rubocop',
-\   'executable': 'rubocop',
+\   'executable_callback': 'ale#handlers#rubocop#GetExecutable',
 \   'command_callback': 'ale_linters#ruby#rubocop#GetCommand',
 \   'callback': 'ale_linters#ruby#rubocop#Handle',
 \})

ale_linters/rust/cargo.vim

@@ -4,7 +4,7 @@
 let g:ale_rust_cargo_use_check = get(g:, 'ale_rust_cargo_use_check', 0)
 
 function! ale_linters#rust#cargo#GetCargoExecutable(bufnr) abort
-    if ale#path#FindNearestFile(a:bufnr, 'Cargo.toml') !=# ''
+    if ale#path#FindNearestFile(a:bufnr, 'Cargo.toml') isnot# ''
         return 'cargo'
     else
         " if there is no Cargo.toml file, we don't use cargo even if it exists,

ale_linters/rust/rls.vim

@@ -0,0 +1,33 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: A language server for Rust
+
+call ale#Set('rust_rls_executable', 'rls')
+
+function! ale_linters#rust#rls#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'rust_rls_executable')
+endfunction
+
+function! ale_linters#rust#rls#GetCommand(buffer) abort
+    let l:executable = ale_linters#rust#rls#GetExecutable(a:buffer)
+
+    return ale#Escape(l:executable) . ' +nightly'
+endfunction
+
+function! ale_linters#rust#rls#GetLanguage(buffer) abort
+    return 'rust'
+endfunction
+
+function! ale_linters#rust#rls#GetProjectRoot(buffer) abort
+    let l:cargo_file = ale#path#FindNearestFile(a:buffer, 'Cargo.toml')
+
+    return !empty(l:cargo_file) ? fnamemodify(l:cargo_file, ':h') : ''
+endfunction
+
+call ale#linter#Define('rust', {
+\   'name': 'rls',
+\   'lsp': 'stdio',
+\   'executable_callback': 'ale_linters#rust#rls#GetExecutable',
+\   'command_callback': 'ale_linters#rust#rls#GetCommand',
+\   'language_callback': 'ale_linters#rust#rls#GetLanguage',
+\   'project_root_callback': 'ale_linters#rust#rls#GetProjectRoot',
+\})

ale_linters/rust/rustc.vim

@@ -7,7 +7,7 @@ function! ale_linters#rust#rustc#RustcCommand(buffer_number) abort
     " <project root>/target/release/deps/
     let l:cargo_file = ale#path#FindNearestFile(a:buffer_number, 'Cargo.toml')
 
-    if l:cargo_file !=# ''
+    if l:cargo_file isnot# ''
         let l:project_root = fnamemodify(l:cargo_file, ':h')
         let l:dependencies = '-L ' . l:project_root . '/target/debug/deps -L ' .
         \   l:project_root . '/target/release/deps'

ale_linters/sass/stylelint.vim

@@ -1,21 +1,12 @@
 " Author: diartyz <diartyz@gmail.com>
 
-let g:ale_sass_stylelint_executable =
-\   get(g:, 'ale_sass_stylelint_executable', 'stylelint')
-
-let g:ale_sass_stylelint_use_global =
-\   get(g:, 'ale_sass_stylelint_use_global', 0)
+call ale#Set('sass_stylelint_executable', 'stylelint')
+call ale#Set('sass_stylelint_use_global', 0)
 
 function! ale_linters#sass#stylelint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'sass_stylelint_use_global')
-        return ale#Var(a:buffer, 'sass_stylelint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'sass_stylelint', [
     \   'node_modules/.bin/stylelint',
-    \   ale#Var(a:buffer, 'sass_stylelint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#sass#stylelint#GetCommand(buffer) abort

ale_linters/scala/scalac.vim

@@ -1,6 +1,26 @@
-" Author: Zoltan Kalmar - https://github.com/kalmiz
+" Author: Zoltan Kalmar - https://github.com/kalmiz,
+"         w0rp <devw0rp@gmail.com>
 " Description: Basic scala support using scalac
 
+function! ale_linters#scala#scalac#GetExecutable(buffer) abort
+    if index(split(getbufvar(a:buffer, '&filetype'), '\.'), 'sbt') >= 0
+        " Don't check sbt files with scalac.
+        return ''
+    endif
+
+    return 'scalac'
+endfunction
+
+function! ale_linters#scala#scalac#GetCommand(buffer) abort
+    let l:executable = ale_linters#scala#scalac#GetExecutable(a:buffer)
+
+    if empty(l:executable)
+        return ''
+    endif
+
+    return ale#Escape(l:executable) . ' -Ystop-after:parser %t'
+endfunction
+
 function! ale_linters#scala#scalac#Handle(buffer, lines) abort
     " Matches patterns line the following:
     "
@@ -18,7 +38,7 @@ function! ale_linters#scala#scalac#Handle(buffer, lines) abort
         endif
 
         let l:text = l:match[3]
-        let l:type = l:match[2] ==# 'error' ? 'E' : 'W'
+        let l:type = l:match[2] is# 'error' ? 'E' : 'W'
         let l:col = 0
 
         if l:ln + 1 < len(a:lines)
@@ -38,8 +58,8 @@ endfunction
 
 call ale#linter#Define('scala', {
 \   'name': 'scalac',
-\   'executable': 'scalac',
-\   'output_stream': 'stderr',
-\   'command': 'scalac -Ystop-after:parser %t',
+\   'executable_callback': 'ale_linters#scala#scalac#GetExecutable',
+\   'command_callback': 'ale_linters#scala#scalac#GetCommand',
 \   'callback': 'ale_linters#scala#scalac#Handle',
+\   'output_stream': 'stderr',
 \})

ale_linters/scala/scalastyle.vim

@@ -0,0 +1,83 @@
+" Author: Kevin Kays - https://github.com/okkays
+" Description: Support for the scalastyle checker.
+
+let g:ale_scala_scalastyle_options =
+\   get(g:, 'ale_scala_scalastyle_options', '')
+
+let g:ale_scalastyle_config_loc =
+\   get(g:, 'ale_scalastyle_config_loc', '')
+
+function! ale_linters#scala#scalastyle#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    "
+    " warning file=/home/blurble/Doop.scala message=Missing or badly formed ScalaDoc: Extra @param foobles line=190
+
+    let l:patterns = [
+    \   '^\(.\+\) .\+ message=\(.\+\) line=\(\d\+\)$',
+    \   '^\(.\+\) .\+ message=\(.\+\) line=\(\d\+\) column=\(\d\+\)$',
+    \]
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:patterns)
+        let l:args = {
+        \   'lnum': l:match[3] + 0,
+        \   'type': l:match[1] =~? 'error' ? 'E' : 'W',
+        \   'text': l:match[2]
+        \}
+
+        if !empty(l:match[4])
+            let l:args['col'] = l:match[4] + 1
+        endif
+
+        call add(l:output, l:args)
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#scala#scalastyle#GetCommand(buffer) abort
+    " Search for scalastyle config in parent directories.
+    let l:scalastyle_config = ''
+    let l:potential_configs = [
+    \   'scalastyle_config.xml',
+    \   'scalastyle-config.xml'
+    \]
+    for l:config in l:potential_configs
+        let l:scalastyle_config = ale#path#ResolveLocalPath(
+        \   a:buffer,
+        \   l:config,
+        \   ''
+        \)
+        if !empty(l:scalastyle_config)
+            break
+        endif
+    endfor
+
+    " If all else fails, try the global config.
+    if empty(l:scalastyle_config)
+        let l:scalastyle_config = get(g:, 'ale_scalastyle_config_loc', '')
+    endif
+
+    " Build the command using the config file and additional options.
+    let l:command = 'scalastyle'
+
+    if !empty(l:scalastyle_config)
+        let l:command .= ' --config ' . ale#Escape(l:scalastyle_config)
+    endif
+
+    if !empty(g:ale_scala_scalastyle_options)
+        let l:command .= ' ' . g:ale_scala_scalastyle_options
+    endif
+
+    let l:command .= ' %t'
+
+    return l:command
+endfunction
+
+call ale#linter#Define('scala', {
+\   'name': 'scalastyle',
+\   'executable': 'scalastyle',
+\   'output_stream': 'stdout',
+\   'command_callback': 'ale_linters#scala#scalastyle#GetCommand',
+\   'callback': 'ale_linters#scala#scalastyle#Handle',
+\})

ale_linters/scss/scsslint.vim

@@ -19,7 +19,7 @@ function! ale_linters#scss#scsslint#Handle(buffer, lines) abort
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
         \   'text': l:match[4],
-        \   'type': l:match[3] ==# 'E' ? 'E' : 'W',
+        \   'type': l:match[3] is# 'E' ? 'E' : 'W',
         \})
     endfor
 

ale_linters/scss/stylelint.vim

@@ -1,21 +1,12 @@
 " Author: diartyz <diartyz@gmail.com>
 
-let g:ale_scss_stylelint_executable =
-\   get(g:, 'ale_scss_stylelint_executable', 'stylelint')
-
-let g:ale_scss_stylelint_use_global =
-\   get(g:, 'ale_scss_stylelint_use_global', 0)
+call ale#Set('scss_stylelint_executable', 'stylelint')
+call ale#Set('scss_stylelint_use_global', 0)
 
 function! ale_linters#scss#stylelint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'scss_stylelint_use_global')
-        return ale#Var(a:buffer, 'scss_stylelint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'scss_stylelint', [
     \   'node_modules/.bin/stylelint',
-    \   ale#Var(a:buffer, 'scss_stylelint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#scss#stylelint#GetCommand(buffer) abort

ale_linters/sh/shell.vim

@@ -11,24 +11,16 @@ endif
 if !exists('g:ale_sh_shell_default_shell')
     let g:ale_sh_shell_default_shell = fnamemodify($SHELL, ':t')
 
-    if g:ale_sh_shell_default_shell ==# '' || g:ale_sh_shell_default_shell ==# 'fish'
+    if g:ale_sh_shell_default_shell is# '' || g:ale_sh_shell_default_shell is# 'fish'
         let g:ale_sh_shell_default_shell = 'bash'
     endif
 endif
 
 function! ale_linters#sh#shell#GetExecutable(buffer) abort
-    let l:banglines = getbufline(a:buffer, 1)
+    let l:shell_type = ale#handlers#sh#GetShellType(a:buffer)
 
-    " Take the shell executable from the hashbang, if we can.
-    if len(l:banglines) == 1 && l:banglines[0] =~# '^#!'
-        " Remove options like -e, etc.
-        let l:line = substitute(l:banglines[0], '--\?[a-zA-Z0-9]\+', '', 'g')
-
-        for l:possible_shell in ['bash', 'tcsh', 'csh', 'zsh', 'sh']
-            if l:line =~# l:possible_shell . '\s*$'
-                return l:possible_shell
-            endif
-        endfor
+    if !empty(l:shell_type)
+        return l:shell_type
     endif
 
     return ale#Var(a:buffer, 'sh_shell_default_shell')

ale_linters/sh/shellcheck.vim

@@ -19,25 +19,35 @@ function! ale_linters#sh#shellcheck#GetExecutable(buffer) abort
     return ale#Var(a:buffer, 'sh_shellcheck_executable')
 endfunction
 
-function! s:GetDialectArgument() abort
-    if exists('b:is_bash') && b:is_bash
-        return '-s bash'
-    elseif exists('b:is_sh') && b:is_sh
-        return '-s sh'
-    elseif exists('b:is_kornshell') && b:is_kornshell
-        return '-s ksh'
+function! ale_linters#sh#shellcheck#GetDialectArgument(buffer) abort
+    let l:shell_type = ale#handlers#sh#GetShellType(a:buffer)
+
+    if !empty(l:shell_type)
+        return l:shell_type
+    endif
+
+    " If there's no hashbang, try using Vim's buffer variables.
+    if get(b:, 'is_bash')
+        return 'bash'
+    elseif get(b:, 'is_sh')
+        return 'sh'
+    elseif get(b:, 'is_kornshell')
+        return 'ksh'
     endif
 
     return ''
 endfunction
 
 function! ale_linters#sh#shellcheck#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'sh_shellcheck_options')
     let l:exclude_option = ale#Var(a:buffer, 'sh_shellcheck_exclusions')
+    let l:dialect = ale_linters#sh#shellcheck#GetDialectArgument(a:buffer)
 
     return ale_linters#sh#shellcheck#GetExecutable(a:buffer)
-    \   . ' ' . ale#Var(a:buffer, 'sh_shellcheck_options')
-    \   . ' ' . (!empty(l:exclude_option) ? '-e ' . l:exclude_option : '')
-    \   . ' ' . s:GetDialectArgument() . ' -f gcc -'
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . (!empty(l:exclude_option) ? ' -e ' . l:exclude_option : '')
+    \   . (!empty(l:dialect) ? ' -s ' . l:dialect : '')
+    \   . ' -f gcc -'
 endfunction
 
 call ale#linter#Define('sh', {

ale_linters/sml/smlnj.vim

@@ -29,7 +29,7 @@ function! ale_linters#sml#smlnj#Handle(buffer, lines) abort
           \   'bufnr': a:buffer,
           \   'lnum': l:match[1] + 0,
           \   'text': l:match[2] . ': ' . l:match[3],
-          \   'type': l:match[2] ==# 'error' ? 'E' : 'W',
+          \   'type': l:match[2] is# 'error' ? 'E' : 'W',
           \})
           continue
         endif

ale_linters/stylus/stylelint.vim

@@ -0,0 +1,24 @@
+" Author: diartyz <diartyz@gmail.com>, w0rp <devw0rp@gmail.com>
+
+call ale#Set('stylus_stylelint_executable', 'stylelint')
+call ale#Set('stylus_stylelint_options', '')
+call ale#Set('stylus_stylelint_use_global', 0)
+
+function! ale_linters#stylus#stylelint#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'stylus_stylelint', [
+    \   'node_modules/.bin/stylelint',
+    \])
+endfunction
+
+function! ale_linters#stylus#stylelint#GetCommand(buffer) abort
+    return ale_linters#stylus#stylelint#GetExecutable(a:buffer)
+    \   . ' ' . ale#Var(a:buffer, 'stylus_stylelint_options')
+    \   . ' --stdin-filename %s'
+endfunction
+
+call ale#linter#Define('stylus', {
+\   'name': 'stylelint',
+\   'executable_callback': 'ale_linters#stylus#stylelint#GetExecutable',
+\   'command_callback': 'ale_linters#stylus#stylelint#GetCommand',
+\   'callback': 'ale#handlers#css#HandleStyleLintFormat',
+\})

ale_linters/tcl/nagelfar.vim

@@ -0,0 +1,46 @@
+" Author: Nick James <github@nsjuk.xyz>
+" Description: nagelfar linter for tcl files
+
+call ale#Set('tcl_nagelfar_executable', 'nagelfar.tcl')
+call ale#Set('tcl_nagelfar_options', '')
+
+function! ale_linters#tcl#nagelfar#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'tcl_nagelfar_executable')
+endfunction
+
+function! ale_linters#tcl#nagelfar#GetCommand(buffer) abort
+    let l:options = ale#Var(a:buffer, 'tcl_nagelfar_options')
+
+    return ale#Escape(ale_linters#tcl#nagelfar#GetExecutable(a:buffer))
+    \   . (!empty(l:options) ? ' ' . l:options : '')
+    \   . ' %s'
+endfunction
+
+function! ale_linters#tcl#nagelfar#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    " Line   5: W Found constant "bepa" which is also a variable.
+    " Line  13: E Wrong number of arguments (3) to "set"
+    " Line  93: N Close brace not aligned with line 90 (4 0)
+
+    let l:pattern = '^Line\s\+\([0-9]\+\): \([NEW]\) \(.*\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'type': l:match[2] is# 'N' ? 'W' : l:match[2],
+        \   'text': l:match[3],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('tcl', {
+\   'name': 'nagelfar',
+\   'output_stream': 'stdout',
+\   'executable_callback': 'ale_linters#tcl#nagelfar#GetExecutable',
+\   'command_callback': 'ale_linters#tcl#nagelfar#GetCommand',
+\   'callback': 'ale_linters#tcl#nagelfar#Handle',
+\   'lint_file': 1,
+\})

ale_linters/tex/chktex.vim

@@ -18,7 +18,7 @@ function! ale_linters#tex#chktex#GetCommand(buffer) abort
     let l:command .= ' -v0 -p stdin -q'
 
     if !empty(l:chktex_config)
-        let l:command .= ' -l ' . fnameescape(l:chktex_config)
+        let l:command .= ' -l ' . ale#Escape(l:chktex_config)
     endif
 
     let l:command .= ' ' . ale#Var(a:buffer, 'tex_chktex_options')

ale_linters/typescript/eslint.vim

@@ -0,0 +1,9 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: eslint for JavaScript files
+
+call ale#linter#Define('typescript', {
+\   'name': 'eslint',
+\   'executable_callback': 'ale#handlers#eslint#GetExecutable',
+\   'command_callback': 'ale#handlers#eslint#GetCommand',
+\   'callback': 'ale#handlers#eslint#Handle',
+\})

ale_linters/typescript/tslint.vim

@@ -1,53 +1,38 @@
 " Author: Prashanth Chandra https://github.com/prashcr
 " Description: tslint for TypeScript files
 
-let g:ale_typescript_tslint_executable =
-\   get(g:, 'ale_typescript_tslint_executable', 'tslint')
-
-let g:ale_typescript_tslint_config_path =
-\   get(g:, 'ale_typescript_tslint_config_path', '')
-
-let g:ale_typescript_tslint_use_global =
-\   get(g:, 'ale_typescript_tslint_use_global', 0)
+call ale#Set('typescript_tslint_executable', 'tslint')
+call ale#Set('typescript_tslint_config_path', '')
+call ale#Set('typescript_tslint_use_global', 0)
 
 function! ale_linters#typescript#tslint#GetExecutable(buffer) abort
-    if ale#Var(a:buffer, 'typescript_tslint_use_global')
-        return ale#Var(a:buffer, 'typescript_tslint_executable')
-    endif
-
-    return ale#path#ResolveLocalPath(
-    \   a:buffer,
+    return ale#node#FindExecutable(a:buffer, 'typescript_tslint', [
     \   'node_modules/.bin/tslint',
-    \   ale#Var(a:buffer, 'typescript_tslint_executable')
-    \)
+    \])
 endfunction
 
 function! ale_linters#typescript#tslint#Handle(buffer, lines) abort
-    " Matches patterns like the following:
-    "
-    " hello.ts[7, 41]: trailing whitespace
-    " hello.ts[5, 1]: Forbidden 'var' keyword, use 'let' or 'const' instead
-    "
-    let l:ext = '.' . fnamemodify(bufname(a:buffer), ':e')
-    let l:pattern = '.\+' . l:ext . '\[\(\d\+\), \(\d\+\)\]: \(.\+\)'
+    let l:dir = expand('#' . a:buffer . ':p:h')
     let l:output = []
 
-    for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        let l:line = l:match[1] + 0
-        let l:column = l:match[2] + 0
-        let l:text = l:match[3]
-
+    for l:error in ale#util#FuzzyJSONDecode(a:lines, [])
         call add(l:output, {
-        \   'lnum': l:line,
-        \   'col': l:column,
-        \   'text': l:text,
+        \   'filename': ale#path#GetAbsPath(l:dir, l:error.name),
+        \   'type': (get(l:error, 'ruleSeverity', '') is# 'WARNING' ? 'W' : 'E'),
+        \   'text': has_key(l:error, 'ruleName')
+        \       ? l:error.ruleName . ': ' . l:error.failure
+        \       : l:error.failure,
+        \   'lnum': l:error.startPosition.line + 1,
+        \   'col': l:error.startPosition.character + 1,
+        \   'end_lnum': l:error.endPosition.line + 1,
+        \   'end_col': l:error.endPosition.character + 1,
         \})
     endfor
 
     return l:output
 endfunction
 
-function! ale_linters#typescript#tslint#BuildLintCommand(buffer) abort
+function! ale_linters#typescript#tslint#GetCommand(buffer) abort
     let l:tslint_config_path = ale#path#ResolveLocalPath(
     \   a:buffer,
     \   'tslint.json',
@@ -55,17 +40,19 @@ function! ale_linters#typescript#tslint#BuildLintCommand(buffer) abort
     \)
 
     let l:tslint_config_option = !empty(l:tslint_config_path)
-    \   ? '-c ' . fnameescape(l:tslint_config_path)
+    \   ? ' -c ' . ale#Escape(l:tslint_config_path)
     \   : ''
 
-    return ale_linters#typescript#tslint#GetExecutable(a:buffer)
-    \   . ' ' . l:tslint_config_option
+    return ale#path#BufferCdString(a:buffer)
+    \   . ale_linters#typescript#tslint#GetExecutable(a:buffer)
+    \   . ' --format json'
+    \   . l:tslint_config_option
     \   . ' %t'
 endfunction
 
 call ale#linter#Define('typescript', {
 \   'name': 'tslint',
 \   'executable_callback': 'ale_linters#typescript#tslint#GetExecutable',
-\   'command_callback': 'ale_linters#typescript#tslint#BuildLintCommand',
+\   'command_callback': 'ale_linters#typescript#tslint#GetCommand',
 \   'callback': 'ale_linters#typescript#tslint#Handle',
 \})