feat: fecs support for js/html/css lint and format

`fecs` is a lint tool for HTML/CSS/JavaScript,
see http://fecs.baidu.com for more options.

13 files changed, 199 insertions, 0 deletions

diff --git a/ale_linters/css/fecs.vim b/ale_linters/css/fecs.vim
new file mode 100644
index 00000000..4b54d55a
--- /dev/null
+++ b/ale_linters/css/fecs.vim
@@ -0,0 +1,12 @@
+" Author: harttle <yangjvn@126.com>
+" Description: fecs for CSS files
+
+call ale#Set('css_fecs_executable', 'fecs')
+call ale#Set('css_fecs_use_global', get(g:, 'ale_use_global_executables', 0))
+
+call ale#linter#Define('css', {
+\   'name': 'fecs',
+\   'executable': function('ale#handlers#fecs#GetExecutable'),
+\   'command': function('ale#handlers#fecs#GetCommand'),
+\   'callback': 'ale#handlers#fecs#Handle',
+\})
diff --git a/ale_linters/html/fecs.vim b/ale_linters/html/fecs.vim
new file mode 100644
index 00000000..5a49a6d8
--- /dev/null
+++ b/ale_linters/html/fecs.vim
@@ -0,0 +1,12 @@
+" Author: harttle <yangjvn@126.com>
+" Description: fecs for HTMl files
+
+call ale#Set('html_fecs_executable', 'fecs')
+call ale#Set('html_fecs_use_global', get(g:, 'ale_use_global_executables', 0))
+
+call ale#linter#Define('html', {
+\   'name': 'fecs',
+\   'executable': function('ale#handlers#fecs#GetExecutable'),
+\   'command': function('ale#handlers#fecs#GetCommand'),
+\   'callback': 'ale#handlers#fecs#Handle',
+\})
diff --git a/ale_linters/javascript/fecs.vim b/ale_linters/javascript/fecs.vim
new file mode 100644
index 00000000..e47c0a0b
--- /dev/null
+++ b/ale_linters/javascript/fecs.vim
@@ -0,0 +1,10 @@
+" Author: harttle <yangjvn@126.com>
+" Description: fecs for JavaScript files
+
+call ale#linter#Define('javascript', {
+\   'name': 'fecs',
+\   'executable': function('ale#handlers#fecs#GetExecutable'),
+\   'command': function('ale#handlers#fecs#GetCommand'),
+\   'read_buffer': 0,
+\   'callback': 'ale#handlers#fecs#Handle',
+\})
diff --git a/autoload/ale/fix/registry.vim b/autoload/ale/fix/registry.vim
index 7118c44a..23d32f03 100644
--- a/autoload/ale/fix/registry.vim
+++ b/autoload/ale/fix/registry.vim
@@ -27,6 +27,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['python'],
 \       'description': 'Fix PEP8 issues with black.',
 \   },
+\   'fecs': {
+\       'function': 'ale#fixers#fecs#Fix',
+\       'suggested_filetypes': ['javascript', 'css', 'html'],
+\       'description': 'Apply fecs format to a file.',
+\   },
 \   'tidy': {
 \       'function': 'ale#fixers#tidy#Fix',
 \       'suggested_filetypes': ['html'],
diff --git a/autoload/ale/fixers/fecs.vim b/autoload/ale/fixers/fecs.vim
new file mode 100644
index 00000000..c783588c
--- /dev/null
+++ b/autoload/ale/fixers/fecs.vim
@@ -0,0 +1,20 @@
+" Author: harttle <yangjvn@126.com>
+" Description: Apply fecs format to a file.
+
+call ale#Set('html_fecs_executable', 'fecs')
+call ale#Set('html_fecs_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale#fixers#fecs#Fix(buffer) abort
+    let l:executable = ale#handlers#fecs#GetExecutable(a:buffer)
+
+    if !executable(l:executable)
+        return 0
+    endif
+
+    let l:config_options = ' format --replace=true'
+
+    return {
+    \   'command': ale#Escape(l:executable) . l:config_options . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction
diff --git a/autoload/ale/handlers/fecs.vim b/autoload/ale/handlers/fecs.vim
new file mode 100644
index 00000000..ad94c61d
--- /dev/null
+++ b/autoload/ale/handlers/fecs.vim
@@ -0,0 +1,52 @@
+" Author: harttle <yangjvn@126.com>
+" Description: fecs http://fecs.baidu.com/
+
+call ale#Set('javascript_fecs_executable', 'fecs')
+call ale#Set('javascript_fecs_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale#handlers#fecs#GetCommand(buffer) abort
+    return '%e check --colors=false --rule=true %t'
+endfunction
+
+function! ale#handlers#fecs#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'javascript_fecs', [
+    \   'node_modules/.bin/fecs',
+    \   'node_modules/fecs/bin/fecs',
+    \])
+endfunction
+
+function! ale#handlers#fecs#Handle(buffer, lines) abort
+    " Matches patterns looking like the following
+    "
+    " fecs  WARN → line 20, col 25: Unexpected console statement.     (no-console)
+    " fecs ERROR → line 24, col 36: Missing radix parameter.  (radix)
+    "
+    let l:pattern = '\v^.*(WARN|ERROR)\s+→\s+line (\d+),\s+col\s+(\d+):\s+(.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:obj = {
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'text': l:match[4]
+        \}
+
+        let l:code_match = matchlist(l:match[4], '\v^(.{-})\s*\((.+)\)$')
+
+        if !empty(l:code_match)
+            let l:obj.code = l:code_match[2]
+            let l:obj.text = l:code_match[1]
+        endif
+
+        if l:match[1] ==# 'WARN'
+            let l:obj.type = 'W'
+        elseif l:match[1] ==# 'ERROR'
+            let l:obj.type = 'E'
+        endif
+
+        call add(l:output, l:obj)
+    endfor
+
+    return l:output
+endfunction
+
diff --git a/doc/ale-css.txt b/doc/ale-css.txt
index f3cae385..a1e0ac5c 100644
--- a/doc/ale-css.txt
+++ b/doc/ale-css.txt
@@ -3,6 +3,14 @@ ALE CSS Integration                                           *ale-css-options*
 
 
 ===============================================================================
+fecs                                                            *ale-css-fecs*
+
+`fecs` options for CSS is the same as the options for JavaScript,
+and both of them reads `./.fecsrc` as the default configuration file.
+See: |ale-javascript-fecs|.
+
+
+===============================================================================
 prettier                                                     *ale-css-prettier*
 
 See |ale-javascript-prettier| for information about the available options.
diff --git a/doc/ale-html.txt b/doc/ale-html.txt
index 1d30929f..5d6b20e2 100644
--- a/doc/ale-html.txt
+++ b/doc/ale-html.txt
@@ -3,6 +3,14 @@ ALE HTML Integration                                         *ale-html-options*
 
 
 ===============================================================================
+fecs                                                            *ale-html-fecs*
+
+`fecs` options for HTMl is the same as the options for JavaScript,
+and both of them reads `./.fecsrc` as the default configuration file.
+See: |ale-javascript-fecs|.
+
+
+===============================================================================
 htmlhint                                                    *ale-html-htmlhint*
 
 g:ale_html_htmlhint_executable                 *g:ale_html_htmlhint_executable*
diff --git a/doc/ale-javascript.txt b/doc/ale-javascript.txt
index 53a70fd7..ea0a7089 100644
--- a/doc/ale-javascript.txt
+++ b/doc/ale-javascript.txt
@@ -74,6 +74,33 @@ g:ale_javascript_eslint_suppress_missing_config
 
 
 ===============================================================================
+fecs                                                      *ale-javascript-fecs*
+
+`fecs` is a lint tool for HTML/CSS/JavaScript, can be installed via:
+
+  `$ npm install --save-dev fecs`
+
+And the configuration file is located at `./fecsrc`, see http://fecs.baidu.com
+for more options.
+
+
+g:ale_javascript_fecs_executable             *g:ale_javascript_fecs_executable*
+                                             *b:ale_javascript_fecs_executable*
+  Type: |String|
+  Default: `'fecs'`
+
+  See |ale-integrations-local-executables|
+
+
+g:ale_javascript_fecs_use_global             *g:ale_javascript_fecs_use_global*
+                                             *b:ale_javascript_fecs_use_global*
+  Type: |Number|
+  Default: `get(g:, 'ale_use_global_executables', 0)`
+
+  See |ale-integrations-local-executables|
+
+
+===============================================================================
 flow                                                      *ale-javascript-flow*
 
 g:ale_javascript_flow_executable             *g:ale_javascript_flow_executable*
diff --git a/doc/ale-supported-languages-and-tools.txt b/doc/ale-supported-languages-and-tools.txt
index eff2e607..59115b81 100644
--- a/doc/ale-supported-languages-and-tools.txt
+++ b/doc/ale-supported-languages-and-tools.txt
@@ -187,6 +187,7 @@ Notes:
   * `terraform-fmt`
 * HTML
   * `alex`!!
+  * `fecs`
   * `HTMLHint`
   * `prettier`
   * `proselint`
@@ -205,6 +206,7 @@ Notes:
   * `uncrustify`
 * JavaScript
   * `eslint`
+  * `fecs`
   * `flow`
   * `jscs`
   * `jshint`
@@ -437,6 +439,7 @@ Notes:
   * `thrift`
 * TypeScript
   * `eslint`
+  * `fecs`
   * `prettier`
   * `tslint`
   * `tsserver`
diff --git a/doc/ale.txt b/doc/ale.txt
index 6d78fd89..f6ce9894 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -1893,6 +1893,7 @@ documented in additional help files.
     mcsc..................................|ale-cs-mcsc|
     uncrustify............................|ale-cs-uncrustify|
   css.....................................|ale-css-options|
+    fecs..................................|ale-css-fecs|
     prettier..............................|ale-css-prettier|
     stylelint.............................|ale-css-stylelint|
   cuda....................................|ale-cuda-options|
@@ -1970,6 +1971,7 @@ documented in additional help files.
   hcl.....................................|ale-hcl-options|
     terraform-fmt.........................|ale-hcl-terraform-fmt|
   html....................................|ale-html-options|
+    fecs..................................|ale-html-fecs|
     htmlhint..............................|ale-html-htmlhint|
     tidy..................................|ale-html-tidy|
     prettier..............................|ale-html-prettier|
@@ -1988,6 +1990,7 @@ documented in additional help files.
     uncrustify............................|ale-java-uncrustify|
   javascript..............................|ale-javascript-options|
     eslint................................|ale-javascript-eslint|
+    fecs..................................|ale-javascript-fecs|
     flow..................................|ale-javascript-flow|
     importjs..............................|ale-javascript-importjs|
     jscs..................................|ale-javascript-jscs|
diff --git a/supported-tools.md b/supported-tools.md
index 74cea65c..c3eca442 100644
--- a/supported-tools.md
+++ b/supported-tools.md
@@ -98,6 +98,7 @@ formatting.
   * [crystal](https://crystal-lang.org/) :floppy_disk:
 * CSS
   * [csslint](http://csslint.net/)
+  * [fecs](http://fecs.baidu.com/)
   * [prettier](https://github.com/prettier/prettier)
   * [stylelint](https://github.com/stylelint/stylelint)
 * Cucumber
@@ -196,6 +197,7 @@ formatting.
   * [terraform-fmt](https://github.com/hashicorp/terraform)
 * HTML
   * [alex](https://github.com/wooorm/alex) :floppy_disk:
+  * [fecs](http://fecs.baidu.com/)
   * [HTMLHint](http://htmlhint.com/)
   * [prettier](https://github.com/prettier/prettier)
   * [proselint](http://proselint.com/)
@@ -214,6 +216,7 @@ formatting.
   * [uncrustify](https://github.com/uncrustify/uncrustify)
 * JavaScript
   * [eslint](http://eslint.org/)
+  * [fecs](http://fecs.baidu.com/)
   * [flow](https://flowtype.org/)
   * [jscs](http://jscs.info/)
   * [jshint](http://jshint.com/)
@@ -446,6 +449,7 @@ formatting.
   * [thrift](http://thrift.apache.org/)
 * TypeScript
   * [eslint](http://eslint.org/)
+  * [fecs](http://fecs.baidu.com/)
   * [prettier](https://github.com/prettier/prettier)
   * [tslint](https://github.com/palantir/tslint)
   * [tsserver](https://github.com/Microsoft/TypeScript/wiki/Standalone-Server-%28tsserver%29)
diff --git a/test/handler/test_fecs_handler.vader b/test/handler/test_fecs_handler.vader
new file mode 100644
index 00000000..7c216b8d
--- /dev/null
+++ b/test/handler/test_fecs_handler.vader
@@ -0,0 +1,35 @@
+Before:
+  runtime autoload/ale/handlers/fecs.vim
+
+After:
+  call ale#linter#Reset()
+
+Execute(fecs should parse lines correctly):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 20,
+  \     'col': 25,
+  \     'text': 'Unexpected console statement.',
+  \     'code': 'no-console',
+  \     'type': 'W',
+  \   },
+  \   {
+  \     'lnum': 24,
+  \     'col': 36,
+  \     'text': 'Missing radix parameter.',
+  \     'code': 'radix',
+  \     'type': 'E',
+  \   },
+  \   {
+  \     'lnum': 25,
+  \     'col': 6,
+  \     'text': 'Missing static property value.',
+  \     'type': 'E',
+  \   },
+  \ ],
+  \ ale#handlers#fecs#Handle(347, [
+  \   'fecs  WARN → line 20, col 25: Unexpected console statement.     (no-console)',
+  \   'fecs ERROR → line 24, col 36: Missing radix parameter.  (radix)',
+  \   'fecs ERROR → line 25, col 6: Missing static property value.',
+  \ ])