Fix #518 Fix handling of spaces in filenames for various linters

autoload/ale/handlers/python.vim

@@ -1,8 +1,6 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Error handling for flake8, etc.
 
-let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.\-_]\+'
-
 function! ale#handlers#python#HandlePEP8Format(buffer, lines) abort
     " Matches patterns line the following:
     "
@@ -10,7 +8,7 @@ function! ale#handlers#python#HandlePEP8Format(buffer, lines) abort
     "
     " stdin:6:6: E111 indentation is not a multiple of four
     " test.yml:35: [EANSIBLE0002] Trailing whitespace
-    let l:pattern = '^' . s:path_pattern . ':\(\d\+\):\?\(\d\+\)\?: \[\?\(\([[:alpha:]]\)[[:alnum:]]\+\)\]\? \(.*\)$'
+    let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):?(\d+)?: \[?([[:alnum:]]+)\]? (.*)$'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
@@ -30,8 +28,8 @@ function! ale#handlers#python#HandlePEP8Format(buffer, lines) abort
         call add(l:output, {
         \   'lnum': l:match[1] + 0,
         \   'col': l:match[2] + 0,
-        \   'text': l:code . ': ' . l:match[5],
-        \   'type': l:match[4] ==# 'E' ? 'E' : 'W',
+        \   'text': l:code . ': ' . l:match[4],
+        \   'type': l:code[:0] ==# 'E' ? 'E' : 'W',
         \})
     endfor
 

autoload/ale/handlers/unix.vim

@@ -1,10 +1,8 @@
 " Author: w0rp <devw0rp@gmail.com>
 " Description: Error handling for errors in a Unix format.
 
-let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.\-_]\+'
-
 function! s:HandleUnixFormat(buffer, lines, type) abort
-    let l:pattern = '^' . s:path_pattern . ':\(\d\+\):\?\(\d\+\)\?:\? \?\(.\+\)$'
+    let l:pattern = '\v^[a-zA-Z]?:?[^:]+:(\d+):?(\d+)?:? ?(.+)$'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)

autoload/ale/path.vim

@@ -55,3 +55,30 @@ endfunction
 function! ale#path#BufferCdString(buffer) abort
     return ale#path#CdString(fnamemodify(bufname(a:buffer), ':p:h'))
 endfunction
+
+" Return 1 if a path is an absolute path.
+function! ale#path#IsAbsolute(filename) abort
+    return match(a:filename, '^\v/|^[a-zA-Z]:\\') == 0
+endfunction
+
+" Given a directory and a filename, resolve the path, which may be relative
+" or absolute, and get an absolute path to the file, following symlinks.
+function! ale#path#Resolve(directory, filename) abort
+    return resolve(
+    \   ale#path#IsAbsolute(a:filename)
+    \       ? a:filename
+    \       : a:directory . '/' . a:filename
+    \)
+endfunction
+
+" Given a buffer number and a relative or absolute path, return 1 if the
+" two paths represent the same file on disk.
+function! ale#path#IsBufferPath(buffer, filename) abort
+    let l:buffer_filename = expand('#' . a:buffer . ':p')
+    let l:resolved_filename = ale#path#Resolve(
+    \   fnamemodify(l:buffer_filename, ':h'),
+    \   a:filename
+    \)
+
+    return resolve(l:buffer_filename) == l:resolved_filename
+endfunction