Add linting support for all formats supported by djlint (#4920)

* Refactor djlint linter code

This patch moves the code to the `autoload` directory, so it's available
when it's needed by a specific linter. This avoids redundant code when
another format supported by djlint is added.

* Add linting support for all formats supported by djlint

So far, the `djlint` linter in ALE only supported `html`, which is only
one of several file types supported by `djlint`.

This patch adds support for the following file types:

* gohtmltmpl
* handlebars
* htmlangular
* htmldjango
* jinja
* nunjucks

* Add djlint fixer for various HTML template formats

* Supported formats:
    - html
    - htmlangular
    - htmldjango
    - jinja
    - handlebars
    - nunjucks
    - gohtmltmpl

* Add doc entries

* Add vader tests

---------

Co-authored-by: Adrian Vollmer <computerfluesterer@protonmail.com>

ale_linters/gohtmltmpl/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('gohtmltmpl', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})

ale_linters/handlebars/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('handlebars', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})

ale_linters/html/djlint.vim

@@ -4,45 +4,11 @@
 call ale#Set('html_djlint_executable', 'djlint')
 call ale#Set('html_djlint_options', '')
 
-function! ale_linters#html#djlint#GetExecutable(buffer) abort
-    return ale#Var(a:buffer, 'html_djlint_executable')
-endfunction
-
-function! ale_linters#html#djlint#GetCommand(buffer) abort
-    let l:executable = ale_linters#html#djlint#GetExecutable(a:buffer)
-
-    let l:options = ale#Var(a:buffer, 'html_djlint_options')
-
-    return ale#Escape(l:executable)
-    \ . (!empty(l:options) ? ' ' . l:options : '') . ' %s'
-endfunction
-
-function! ale_linters#html#djlint#Handle(buffer, lines) abort
-    let l:output = []
-    let l:pattern = '\v^([A-Z]\d+) (\d+):(\d+) (.*)$'
-    let l:i = 0
-
-    for l:match in ale#util#GetMatches(a:lines, l:pattern)
-        let l:i += 1
-        let l:item = {
-        \   'lnum': l:match[2] + 0,
-        \   'col': l:match[3] + 0,
-        \   'vcol': 1,
-        \   'text': l:match[4],
-        \   'code': l:match[1],
-        \   'type': 'W',
-        \}
-        call add(l:output, l:item)
-    endfor
-
-    return l:output
-endfunction
-
 call ale#linter#Define('html', {
 \   'name': 'djlint',
-\   'executable': function('ale_linters#html#djlint#GetExecutable'),
-\   'command': function('ale_linters#html#djlint#GetCommand'),
-\   'callback': 'ale_linters#html#djlint#Handle',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
 \})
 
 " vim:ts=4:sw=4:et:

ale_linters/htmlangular/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('htmlangular', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})

ale_linters/htmldjango/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('htmldjango', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})

ale_linters/jinja/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('jinja', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})

ale_linters/nunjucks/djlint.vim

@@ -0,0 +1,12 @@
+" Author: Adrian Vollmer <computerfluesterer@protonmail.com>
+" Description: djlint for Django HTML template files
+
+call ale#Set('html_djlint_executable', 'djlint')
+call ale#Set('html_djlint_options', '')
+
+call ale#linter#Define('nunjucks', {
+\   'name': 'djlint',
+\   'executable': function('ale#handlers#djlint#GetExecutable'),
+\   'command': function('ale#handlers#djlint#GetCommand'),
+\   'callback': 'ale#handlers#djlint#Handle',
+\})