Add phan as a linter for php files (#1026)

Add phan for checking PHP code

README.md

@@ -118,7 +118,7 @@ formatting.
 | Objective-C++ | [clang](http://clang.llvm.org/) |
 | OCaml | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-ocaml-merlin` for configuration instructions |
 | Perl | [perl -c](https://perl.org/), [perl-critic](https://metacpan.org/pod/Perl::Critic) |
-| 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) |
+| PHP | [hack](http://hacklang.org/), [langserver](https://github.com/felixfbecker/php-language-server), [phan](https://github.com/phan/phan) see `:help ale-php-phan` to instructions, [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) |

ale_linters/php/phan.vim

@@ -0,0 +1,36 @@
+" Author: diegoholiveira <https://github.com/diegoholiveira>
+" Description: static analyzer for PHP
+
+" Define the minimum severity
+let g:ale_php_phan_minimum_severity = get(g:, 'ale_php_phan_minimum_severity', 0)
+
+function! ale_linters#php#phan#GetCommand(buffer) abort
+    return 'phan -y '
+    \   . ale#Var(a:buffer, 'php_phan_minimum_severity')
+    \   . ' %s'
+endfunction
+
+function! ale_linters#php#phan#Handle(buffer, lines) abort
+    " Matches against lines like the following:
+    "
+    " /path/to/some-filename.php:18 ERRORTYPE message
+    let l:pattern = '^.*:\(\d\+\)\s\(\w\+\)\s\(.\+\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'text': l:match[3],
+        \   'type': 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('php', {
+\   'name': 'phan',
+\   'executable': 'phan',
+\   'command_callback': 'ale_linters#php#phan#GetCommand',
+\   'callback': 'ale_linters#php#phan#Handle',
+\})

doc/ale-php.txt

@@ -34,6 +34,21 @@ g:ale_php_langserver_use_global               *g:ale_php_langserver_use_global*
   See: |ale-integrations-local-executables|
 
 
+===============================================================================
+phan                                                             *ale-php-phan*
+
+WARNING: please do not use this linter if you have an configuration file
+for your project because the phan will look into your entirely project and
+ale will display in the current buffer warnings that may belong to other file.
+
+g:ale_php_phan_minimum_severity               *g:ale_php_phan_minimum_severity*
+                                              *b:ale_php_phan_minimum_severity*
+  Type: |Number|
+  Default: `0`
+
+  This variable defines the minimum severity level
+
+
 ===============================================================================
 phpcbf                                                         *ale-php-phpcbf*
 

doc/ale.txt

@@ -115,6 +115,7 @@ CONTENTS                                                         *ale-contents*
     php...................................|ale-php-options|
       hack................................|ale-php-hack|
       langserver..........................|ale-php-langserver|
+      phan................................|ale-php-phan|
       phpcbf..............................|ale-php-phpcbf|
       phpcs...............................|ale-php-phpcs|
       phpmd...............................|ale-php-phpmd|
@@ -273,7 +274,7 @@ Notes:
 * Objective-C++: `clang`
 * OCaml: `merlin` (see |ale-ocaml-merlin|)
 * Perl: `perl -c`, `perl-critic`
-* PHP: `hack`, `langserver`, `php -l`, `phpcs`, `phpmd`, `phpstan`, `phpcbf`
+* PHP: `hack`, `langserver`, `phan`, `php -l`, `phpcs`, `phpmd`, `phpstan`, `phpcbf`
 * Pod: `proselint`
 * Pug: `pug-lint`
 * Puppet: `puppet`, `puppet-lint`

test/handler/test_php_phan_handler.vader

@@ -0,0 +1,24 @@
+Before:
+  runtime ale_linters/php/phan.vim
+
+Execute(The php static analyzer handler should parse errors from phan):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 25,
+  \     'type': 'W',
+  \     'text': 'Return type of getValidator is undeclared type \Respect\Validation\Validator',
+  \   },
+  \   {
+  \     'lnum': 66,
+  \     'type': 'W',
+  \     'text': 'Call to method string from undeclared class \Respect\Validation\Validator',
+  \   },
+  \ ],
+  \ ale_linters#php#phan#Handle(347, [
+  \ "example.php:25 PhanUndeclaredTypeReturnType Return type of getValidator is undeclared type \\Respect\\Validation\\Validator",
+  \ "example.php:66 PhanUndeclaredClassMethod Call to method string from undeclared class \\Respect\\Validation\\Validator",
+  \ ])
+
+After:
+  call ale#linter#Reset()