Add support for nim check

ale_linters/nim/nimcheck.vim

@@ -0,0 +1,55 @@
+" Author: Baabelfish
+" Description: Typechecking for nim files
+
+
+function! ale_linters#nim#nimcheck#Handle(buffer, lines) abort
+    let l:pattern = '^\(.\+\.nim\)(\(\d\+\), \(\d\+\)) \(.\+\)'
+    let l:output = [] 
+
+    for l:line in a:lines
+        let l:match = matchlist(l:line, l:pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        let l:buffer = l:match[1] + 0
+        let l:line = l:match[2] + 0
+        let l:column = l:match[3] + 0
+        let l:text = l:match[4]
+        let l:type = 'W'
+
+        let l:textmatch = matchlist(l:match[4], '\(.*\):')
+
+        if len(l:textmatch) > 0
+            let l:errortype = l:textmatch[1]
+            if l:errortype ==# 'Error'
+                let l:type = 'E'
+            endif
+        endif
+
+        call add(l:output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': l:line,
+        \   'col': l:column,
+        \   'text': l:text,
+        \   'type': l:type,
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+
+function! ale_linters#nim#nimcheck#GetCommand(buffer)
+    return 'nim check --path:' . fnameescape(fnamemodify(bufname(a:buffer), ':p:h')) . ' --verbosity:0 --colors:off --listFullPaths %t'
+endfunction
+
+
+call ale#linter#Define('nim', {
+\    'name': 'nimcheck',
+\    'executable': 'nim',
+\    'output_stream': 'both',
+\    'command_callback': 'ale_linters#nim#nimcheck#GetCommand',
+\    'callback': 'ale_linters#nim#nimcheck#Handle'
+\})