Improve pyrex cython linter.

ale_linters/pyrex/cython.vim

@@ -1,10 +1,43 @@
-" Author: w0rp <devw0rp@gmail.com>
+" Author: w0rp <devw0rp@gmail.com>,
+" Nicolas Pauss <https://github.com/nicopauss>
 " Description: cython syntax checking for cython files.
 
+call ale#Set('pyrex_cython_executable', 'cython')
+call ale#Set('pyrex_cython_options', '--warning-extra')
+
+function! ale_linters#pyrex#cython#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'pyrex_cython_executable')
+endfunction
+
+function! ale_linters#pyrex#cython#GetCommand(buffer) abort
+    let l:local_dir = ale#Escape(fnamemodify(bufname(a:buffer), ':p:h'))
+
+    return ale#Escape(ale_linters#pyrex#cython#GetExecutable(a:buffer))
+    \   . ' --working ' . l:local_dir . ' --include-dir ' . l:local_dir
+    \   . ' ' . ale#Var(a:buffer, 'pyrex_cython_options')
+    \   . ' --output-file ' . g:ale#util#nul_file . ' %t'
+endfunction
+
+function! ale_linters#pyrex#cython#Handle(buffer, lines) abort
+    let l:pattern = '\v^(\w+: )?[^:]+:(\d+):?(\d+)?:? ?(.+)$'
+    let l:output = []
+
+    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,
+        \   'text': l:match[4],
+        \   'type': l:match[1][0] is# 'w' ? 'W' : 'E',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
 call ale#linter#Define('pyrex', {
 \   'name': 'cython',
 \   'output_stream': 'stderr',
-\   'executable': 'cython',
-\   'command': 'cython --warning-extra -o ' . g:ale#util#nul_file . ' %t',
-\   'callback': 'ale#handlers#unix#HandleAsError',
+\   'executable_callback': 'ale_linters#pyrex#cython#GetExecutable',
+\   'command_callback': 'ale_linters#pyrex#cython#GetCommand',
+\   'callback': 'ale_linters#pyrex#cython#Handle',
 \})

doc/ale-pyrex.txt

@@ -0,0 +1,25 @@
+===============================================================================
+ALE Pyrex (Cython) Integration                              *ale-pyrex-options*
+
+
+===============================================================================
+cython                                                       *ale-pyrex-cython*
+
+g:ale_pyrex_cython_executable                   *g:ale_pyrex_cython_executable*
+                                                *b:ale_pyrex_cython_executable*
+  Type: |String|
+  Default: `'cython'`
+
+  This variable can be changed to use a different executable for cython.
+
+
+g:ale_pyrex_cython_options                         *g:ale_pyrex_cython_options*
+                                                   *b:ale_pyrex_cython_options*
+  Type: |String|
+  Default: `'--warning-extra --warning-errors'`
+
+  This variable can be changed to modify flags given to cython.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -185,6 +185,8 @@ CONTENTS                                                         *ale-contents*
       puglint.............................|ale-pug-puglint|
     puppet................................|ale-puppet-options|
       puppetlint..........................|ale-puppet-puppetlint|
+    pyrex (cython)........................|ale-pyrex-options|
+      cython..............................|ale-pyrex-cython|
     python................................|ale-python-options|
       autopep8............................|ale-python-autopep8|
       black...............................|ale-python-black|

test/command_callback/test_pyrex_cython_command_callback.vader

@@ -0,0 +1,50 @@
+Before:
+  Save g:ale_pyrex_cython_executable
+  Save g:ale_pyrex_cython_options
+
+  unlet! g:ale_pyrex_cython_executable
+  unlet! b:ale_pyrex_cython_executable
+  unlet! g:ale_pyrex_cython_options
+  unlet! b:ale_pyrex_cython_options
+
+  runtime ale_linters/pyrex/cython.vim
+
+  call ale#test#SetDirectory('/testplugin/test/command_callback')
+
+After:
+  Restore
+  unlet! b:ale_pyrex_cython_options
+  unlet! b:ale_pyrex_cython_executable
+  call ale#linter#Reset()
+  call ale#test#RestoreDirectory()
+
+Execute(The default cython command should be correct):
+  AssertEqual
+  \ ale#Escape('cython')
+  \   . ' --working ' . ale#Escape(g:dir)
+  \   . ' --include-dir ' . ale#Escape(g:dir)
+  \   . ' --warning-extra'
+  \   . ' --output-file ' . g:ale#util#nul_file . ' %t',
+  \ ale_linters#pyrex#cython#GetCommand(bufnr(''))
+
+Execute(The cython executable should be configurable):
+  let b:ale_pyrex_cython_executable = 'cython_foobar'
+
+  AssertEqual
+  \ ale#Escape('cython_foobar')
+  \   . ' --working ' . ale#Escape(g:dir)
+  \   . ' --include-dir ' . ale#Escape(g:dir)
+  \   . ' --warning-extra'
+  \   . ' --output-file ' . g:ale#util#nul_file . ' %t',
+  \ ale_linters#pyrex#cython#GetCommand(bufnr(''))
+
+Execute(Additional cython options should be configurable):
+  let b:ale_pyrex_cython_options = '--foobar'
+
+  AssertEqual
+  \ ale#Escape('cython')
+  \   . ' --working ' . ale#Escape(g:dir)
+  \   . ' --include-dir ' . ale#Escape(g:dir)
+  \   . ' --foobar'
+  \   . ' --output-file ' . g:ale#util#nul_file . ' %t',
+  \ ale_linters#pyrex#cython#GetCommand(bufnr(''))

test/handler/test_pyrex_cython_handler.vader

@@ -0,0 +1,26 @@
+Before:
+  runtime ale_linters/pyrex/cython.vim
+
+After:
+  call ale#linter#Reset()
+
+Execute(The cython handler should handle warnings and errors):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 42,
+  \     'col': 7,
+  \     'text': 'some warning',
+  \     'type': 'W',
+  \   },
+  \   {
+  \     'lnum': 777,
+  \     'col': 21,
+  \     'text': 'some error',
+  \     'type': 'E',
+  \   },
+  \ ],
+  \ ale_linters#pyrex#cython#Handle(347, [
+  \   'warning: file:42:7: some warning',
+  \   'file:777:21: some error',
+  \ ])