Fix mcsc paths and escaping for Windows

ale_linters/cs/mcsc.vim

@@ -1,55 +1,47 @@
-" general mcs options which are likely to stay constant across
-" source trees like -pkg:dotnet
-let g:ale_cs_mcsc_options = get(g:, 'ale_cs_mcsc_options', '')
+call ale#Set('cs_mcsc_options', '')
+call ale#Set('cs_mcsc_source', '')
+call ale#Set('cs_mcsc_assembly_path', [])
+call ale#Set('cs_mcsc_assemblies', [])
 
-" path string pointing the linter to the base path of the
-" source tree to check
-let g:ale_cs_mcsc_source = get(g:, 'ale_cs_mcsc_source','.')
+function! s:GetWorkingDirectory(buffer) abort
+    let l:working_directory = ale#Var(a:buffer, 'cs_mcsc_source')
 
-" list of search paths for additional assemblies to consider
-let g:ale_cs_mcsc_assembly_path = get(g:, 'ale_cs_mcsc_assembly_path',[])
+    if !empty(l:working_directory)
+        return l:working_directory
+    endif
+
+    return fnamemodify(bufname(a:buffer), ':p:h')
+endfunction
 
-" list of assemblies to consider
-let g:ale_cs_mcsc_assemblies = get(g:, 'ale_cs_mcsc_assemblies',[])
 function! ale_linters#cs#mcsc#GetCommand(buffer) abort
+    " Pass assembly paths via the -lib: parameter.
+    let l:path_list = ale#Var(a:buffer, 'cs_mcsc_assembly_path')
 
-    " if list of assembly search paths is not empty convert it to
-    " appropriate -lib: parameter of mcs
-    let l:path = ale#Var(a:buffer, 'cs_mcsc_assembly_path')
+    let l:lib_option = !empty(l:path_list)
+    \   ? '-lib:' . join(map(copy(l:path_list), 'ale#Escape(v:val)'), ',')
+    \   : ''
 
-    if !empty(l:path)
-         let l:path = '-lib:"' . join(l:path, '","') .'"'
-    else
-        let l:path =''
-    endif
+    " Pass paths to DLL files via the -r: parameter.
+    let l:assembly_list = ale#Var(a:buffer, 'cs_mcsc_assemblies')
 
-    " if list of assemblies to link is not empty convert it to the
-    " appropriate -r: parameter of mcs
-    let l:assemblies = ale#Var(a:buffer, 'cs_mcsc_assemblies')
-
-    if !empty(l:assemblies)
-        let l:assemblies = '-r:"' . join(l:assemblies, '","') . '"'
-    else
-        let l:assemblies =''
-    endif
+    let l:r_option = !empty(l:assembly_list)
+    \   ? '-r:' . join(map(copy(l:assembly_list), 'ale#Escape(v:val)'), ',')
+    \   : ''
 
     " register temporary module target file with ale
     let l:out = tempname()
     call ale#engine#ManageFile(a:buffer, l:out)
 
-    " assemble linter command string to be executed by ale
-    " implicitly set -unsafe mcs flag set compilation
-    " target to module (-t:module), direct mcs output to
-    " temporary file (-out)
-    "
-    return 'cd "' . ale#Var(a:buffer, 'cs_mcsc_source') . '";'
+    " The code is compiled as a module and the output is redirected to a
+    " temporary file.
+    return ale#path#CdString(s:GetWorkingDirectory(a:buffer))
     \    . 'mcs -unsafe'
     \    . ' ' . ale#Var(a:buffer, 'cs_mcsc_options')
-    \    . ' ' . l:path
-    \    . ' ' . l:assemblies
+    \    . ' ' . l:lib_option
+    \    . ' ' . l:r_option
     \    . ' -out:' . l:out
     \    . ' -t:module'
-    \    . ' -recurse:"*.cs"'
+    \    . ' -recurse:' . ale#Escape('*.cs')
 endfunction
 
 function! ale_linters#cs#mcsc#Handle(buffer, lines) abort
@@ -62,11 +54,12 @@ function! ale_linters#cs#mcsc#Handle(buffer, lines) abort
     " path and not just the file loaded in the buffer
     let l:pattern = '^\v(.+\.cs)\((\d+),(\d+)\)\: ([^ ]+) ([^ ]+): (.+)$'
     let l:output = []
-    let l:source = ale#Var(a:buffer, 'cs_mcsc_source')
+
+    let l:dir = s:GetWorkingDirectory(a:buffer)
 
     for l:match in ale#util#GetMatches(a:lines, l:pattern)
         call add(l:output, {
-        \   'filename': fnamemodify(l:source . '/' . l:match[1], ':p'),
+        \   'filename': ale#path#GetAbsPath(l:dir, l:match[1]),
         \   'lnum': l:match[2] + 0,
         \   'col': l:match[3] + 0,
         \   'type': l:match[4] is# 'error' ? 'E' : 'W',

doc/ale-cs.txt

@@ -63,7 +63,8 @@ g:ale_cs_mcsc_source                                     *g:ale_cs_mcsc_source*
   Default: `''`
 
   This variable defines the root path of the directory tree searched for the
-  '*.cs' files to be linted. If empty the current working directory is used.
+  '*.cs' files to be linted. If this option is empty, the source file's
+  directory will be used.
 
   NOTE: Currently it is not possible to specify sub directories and
   directory sub trees which shall not be searched for *.cs files.

test/command_callback/test_cs_mcsc_command_callbacks.vader

@@ -12,6 +12,8 @@ Before:
   unlet! g:ale_cs_mcsc_assembly_path
   unlet! g:ale_cs_mcsc_assemblies
 
+  let g:prefix = ' -out:TEMP -t:module -recurse:' . ale#Escape('*.cs')
+
   function! GetCommand()
     let l:command = ale_linters#cs#mcsc#GetCommand(bufnr(''))
     let l:command = join(split(l:command))
@@ -28,52 +30,64 @@ After:
   unlet! g:ale_cs_mcsc_source
   unlet! g:ale_cs_mcsc_assembly_path
   unlet! g:ale_cs_mcsc_assemblies
+  unlet! g:ale_prefix
 
   delfunction GetCommand
 
   call ale#linter#Reset()
 
-Execute(Check for proper default command):
+Execute(The mcsc linter should return the correct default command):
   AssertEqual
-  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   . 'mcs -unsafe' . g:prefix,
   \ GetCommand()
 
 Execute(The options should be be used in the command):
   let g:ale_cs_mcsc_options = '-pkg:dotnet'
 
   AssertEqual
-  \   'cd ".";mcs -unsafe ' . g:ale_cs_mcsc_options . ' -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   . 'mcs -unsafe -pkg:dotnet' . g:prefix,
   \ GetCommand()
 
 Execute(The souce path should be be used in the command):
   let g:ale_cs_mcsc_source = '../foo/bar'
 
   AssertEqual
-  \ 'cd "' . g:ale_cs_mcsc_source . '";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
+  \ 'cd ' . ale#Escape('../foo/bar') . ' && '
+  \   . 'mcs -unsafe' . g:prefix,
   \ GetCommand()
 
 Execute(The list of search pathes for assemblies should be be used in the command if not empty):
   let g:ale_cs_mcsc_assembly_path = ['/usr/lib/mono', '../foo/bar']
 
   AssertEqual
-  \ 'cd ".";mcs -unsafe -lib:"' . join(g:ale_cs_mcsc_assembly_path,'","') . '" -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   . 'mcs -unsafe'
+  \   . ' -lib:' . ale#Escape('/usr/lib/mono') . ',' . ale#Escape('../foo/bar')
+  \   . g:prefix,
   \ GetCommand()
 
   let g:ale_cs_mcsc_assembly_path = []
 
   AssertEqual
-  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   . 'mcs -unsafe' . g:prefix,
   \ GetCommand()
 
 Execute(The list of assemblies should be be used in the command if not empty):
   let g:ale_cs_mcsc_assemblies = ['foo.dll', 'bar.dll']
 
   AssertEqual
-  \ 'cd ".";mcs -unsafe -r:"' . join(g:ale_cs_mcsc_assemblies,'","') . '" -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   .  'mcs -unsafe'
+  \   . ' -r:' . ale#Escape('foo.dll') . ',' . ale#Escape('bar.dll')
+  \   . g:prefix,
   \ GetCommand()
 
   let g:ale_cs_mcsc_assemblies = []
 
   AssertEqual
-  \ 'cd ".";mcs -unsafe -out:TEMP -t:module -recurse:"*.cs"',
+  \ ale#path#BufferCdString(bufnr(''))
+  \   . 'mcs -unsafe' . g:prefix,
   \ GetCommand()

test/handler/test_mcsc_handler.vader

@@ -9,6 +9,23 @@ After:
   unlet! g:ale_cs_mcsc_source
   call ale#linter#Reset()
 
+Execute(The mcs handler should work with the default of the buffer's directory):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 12,
+  \     'col' : 29,
+  \     'text': '; expected',
+  \     'code': 'CS1001',
+  \     'type': 'E',
+  \     'filename': ale#path#Winify(expand('%:p:h') . '/Test.cs', 'add_drive'),
+  \   },
+  \ ],
+  \ ale_linters#cs#mcsc#Handle(347, [
+  \   'Test.cs(12,29): error CS1001: ; expected',
+  \   'Compilation failed: 2 error(s), 1 warnings',
+  \ ])
+
 Execute(The mcs handler should handle cannot find symbol errors):
   let g:ale_cs_mcsc_source = '/home/foo/project/bar'