From d1cf20868358281d7940c0f24052d8a04ad61acf Mon Sep 17 00:00:00 2001
From: Vincent Lequertier <sky@riseup.net>
Date: Sun, 9 Oct 2016 17:31:03 +0200
Subject: [PATCH] Add support for perl and perlcritic

---
 README.md                       |  1 +
 ale_linters/perl/perl.vim       | 46 +++++++++++++++++++++++++++++++++
 ale_linters/perl/perlcritic.vim | 46 +++++++++++++++++++++++++++++++++
 doc/ale.txt                     |  1 +
 4 files changed, 94 insertions(+)
 create mode 100644 ale_linters/perl/perl.vim
 create mode 100644 ale_linters/perl/perlcritic.vim

diff --git a/README.md b/README.md
index 8fd4a769..a628e9e3 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ name. That seems to be the fairest way to arrange this table.
 | HTML | [HTMLHint](http://htmlhint.com/), [tidy](http://www.html-tidy.org/) |
 | JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/) |
 | JSON | [jsonlint](http://zaa.ch/jsonlint/) |
+| Perl | [perl -c](https://perl.org/), [perl-critic](https://metacpan.org/pod/Perl::Critic) |
 | PHP | [php -l](https://secure.php.net/), [phpcs](https://github.com/squizlabs/PHP_CodeSniffer) |
 | Pug | [pug-lint](https://github.com/pugjs/pug-lint) |
 | Python | [flake8](http://flake8.pycqa.org/en/latest/) |
diff --git a/ale_linters/perl/perl.vim b/ale_linters/perl/perl.vim
new file mode 100644
index 00000000..ad33b6dc
--- /dev/null
+++ b/ale_linters/perl/perl.vim
@@ -0,0 +1,46 @@
+" Author: Vincent Lequertier <https://github.com/SkySymbol>
+" Description: This file adds support for checking perl syntax
+
+if exists('g:loaded_ale_linters_perl_perlcritic')
+    finish
+endif
+
+let g:loaded_ale_linters_perl_perl = 1
+function! ale_linters#perl#perl#Handle(buffer, lines)
+    let pattern = '\(.\+\) at \(.\+\) line \(\d\+\)'
+    let output = []
+
+    for line in a:lines
+        let l:match = matchlist(line, pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        let line = l:match[3]
+        let column = 1
+        let text = l:match[1]
+        let type = 'E'
+
+        " vcol is Needed to indicate that the column is a character.
+        call add(output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': line,
+        \   'vcol': 0,
+        \   'col': column,
+        \   'text': text,
+        \   'type': type,
+        \   'nr': -1,
+        \})
+    endfor
+
+    return output
+endfunction
+
+call ALEAddLinter('perl', {
+\   'name': 'perl',
+\   'executable': 'perl',
+\   'output_stream': 'both',
+\   'command': 'perl -X -c -Mwarnings -Ilib',
+\   'callback': 'ale_linters#perl#perl#Handle',
+\})
diff --git a/ale_linters/perl/perlcritic.vim b/ale_linters/perl/perlcritic.vim
new file mode 100644
index 00000000..98ac83a8
--- /dev/null
+++ b/ale_linters/perl/perlcritic.vim
@@ -0,0 +1,46 @@
+" Author: Vincent Lequertier <https://github.com/SkySymbol>
+" Description: This file adds support for checking perl with perl critic
+
+if exists('g:loaded_ale_linters_perl_perlcritic')
+    finish
+endif
+
+let g:loaded_ale_linters_perl_perlcritic = 1
+function! ale_linters#perl#perlcritic#Handle(buffer, lines)
+    let pattern = '\(.\+\) at \(.\+\) line \(\d\+\)'
+    let output = []
+
+    for line in a:lines
+        let l:match = matchlist(line, pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        let line = l:match[3]
+        let column = 1
+        let text = l:match[1]
+        let type = 'E'
+
+        " vcol is Needed to indicate that the column is a character.
+        call add(output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': line,
+        \   'vcol': 0,
+        \   'col': column,
+        \   'text': text,
+        \   'type': type,
+        \   'nr': -1,
+        \})
+    endfor
+
+    return output
+endfunction
+
+call ALEAddLinter('perl', {
+\   'name': 'perlcritic',
+\   'executable': 'perlcritic',
+\   'output_stream': 'sdtout',
+\   'command': 'perlcritic --verbose 3 --nocolor',
+\   'callback': 'ale_linters#perl#perlcritic#Handle',
+\})
diff --git a/doc/ale.txt b/doc/ale.txt
index 6772c25a..44f1c7f8 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -53,6 +53,7 @@ The following languages and tools are supported.
 * HTML: 'HTMLHint', 'tidy'
 * JavaScript: 'eslint', 'jscs', 'jshint'
 * JSON: 'jsonlint'
+* Perl: 'perl' (-c flag), 'perlcritic'
 * PHP: 'php' (-l flag), 'phpcs'
 * Pug: 'pug-lint'
 * Python: 'flake8'