Fix #690 - Filter out errors from other files for Haskell

autoload/ale/handlers/haskell.vim

@@ -6,10 +6,11 @@ function! ale#handlers#haskell#HandleGHCFormat(buffer, lines) abort
     "
     "Appoint/Lib.hs:8:1: warning:
     "Appoint/Lib.hs:8:1:
-    let l:pattern = '^[^:]\+:\(\d\+\):\(\d\+\):\(.*\)\?$'
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):(\d+):(.*)?$'
     let l:output = []
 
     let l:corrected_lines = []
+
     for l:line in a:lines
         if len(matchlist(l:line, l:pattern)) > 0
             call add(l:corrected_lines, l:line)
@@ -30,21 +31,25 @@ function! ale#handlers#haskell#HandleGHCFormat(buffer, lines) abort
             continue
         endif
 
-        let l:errors = matchlist(l:match[3], '\(warning:\|error:\)\(.*\)')
+        if !ale#path#IsBufferPath(a:buffer, l:match[1])
+            continue
+        endif
+
+        let l:errors = matchlist(l:match[4], '\(warning:\|error:\)\(.*\)')
 
         if len(l:errors) > 0
           let l:type = l:errors[1]
           let l:text = l:errors[2]
         else
           let l:type = ''
-          let l:text = l:match[3]
+          let l:text = l:match[4]
         endif
 
         let l:type = l:type ==# '' ? 'E' : toupper(l:type[0])
 
         call add(l:output, {
-        \   'lnum': l:match[1] + 0,
-        \   'col': l:match[2] + 0,
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
         \   'text': l:text,
         \   'type': l:type,
         \})

autoload/ale/path.vim

@@ -62,6 +62,23 @@ function! ale#path#IsAbsolute(filename) abort
     return a:filename[:0] ==# '/' || a:filename[1:2] ==# ':\'
 endfunction
 
+" Given a filename, return 1 if the file represents some temporary file
+" created by Vim.
+function! ale#path#IsTempName(filename) abort
+    let l:prefix_list = [
+    \   $TMPDIR,
+    \   '/run/user',
+    \]
+
+    for l:prefix in l:prefix_list
+        if a:filename[:len(l:prefix) - 1] ==# l:prefix
+            return 1
+        endif
+    endfor
+
+    return 0
+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, complex_filename) abort
@@ -83,8 +100,8 @@ function! ale#path#IsBufferPath(buffer, complex_filename) abort
         let l:test_filename = substitute(l:test_filename, '\v^(\.\.[/\\])+', '/', '')
     endif
 
-    " Use the basename for files in /tmp, as they are likely our files.
-    if l:test_filename[:len($TMPDIR) - 1] ==# $TMPDIR
+    " Use the basename for temporary files, as they are likely our files.
+    if ale#path#IsTempName(l:test_filename)
         let l:test_filename = fnamemodify(l:test_filename, ':t')
     endif