Normalize file paths

Author: nickspoons

autoload/OmniSharp/util.vim

@@ -276,7 +276,20 @@ function! OmniSharp#util#TranslatePathForClient(filename) abort
   if filename =~# '\$metadata\$'
     let filename = OmniSharp#util#TempDir() . '/' . fnamemodify(filename, ':t')
   endif
-  return fnamemodify(filename, ':.')
+
+  let modifiers = get(g:, 'OmniSharp_filename_modifiers', ':.')
+
+  if modifiers ==# 'relative'
+    let common = escape(getcwd(), '\')
+    let result = ''
+    while substitute(filename, common . s:dir_separator, '', '') ==# filename
+      let common = fnamemodify(common, ':h')
+      let result .= '..' . s:dir_separator
+    endwhile
+    return result . substitute(filename, common . s:dir_separator, '', '')
+  endif
+
+  return fnamemodify(filename, modifiers)
 endfunction
 
 function! OmniSharp#util#TranslatePathForServer(filename) abort

doc/omnisharp-vim.txt

@@ -410,6 +410,17 @@ Use this option to enable syntastic integration >
 -------------------------------------------------------------------------------
 3.7 MISCELLANEOUS                               *omnisharp-miscellaneous-options*
 
+                                                 *g:OmniSharp_filename_modifiers*
+File paths returned from the server are normalized using Vim
+|filename-modifiers|. The |g:OmniSharp_filename_modifiers| variable allows
+configuring which modifiers are used.
+Additionally, the special value "relative" may be used to force all paths into
+a relatve format, e.g. "../../project/file.cs".
+Default: :. >
+    let g:OmniSharp_filename_modifiers = ':p:~'
+<or >
+    let g:OmniSharp_filename_modifiers = 'relative'
+<
                                                     *g:OmniSharp_lookup_metadata*
 When using `OmniSharpGotoDefinition` and `OmniSharpPreviewDefinition`,
 fall back to looking up metadata for compiled types.