Merge pull request #31 from prashcr/master

Linter: tslint for typescript

README.md

@@ -35,6 +35,7 @@ name. That seems to be the fairest way to arrange this table.
 | JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/) |
 | Python | [flake8](http://flake8.pycqa.org/en/latest/) |
 | Ruby   | [rubocop](https://github.com/bbatsov/rubocop) |
+| TypeScript | [tslint](https://github.com/palantir/tslint)^ |
 | Vim | [vint](https://github.com/Kuniwak/vint)^ |
 
 *^ Supported only on Unix machines via a wrapper script.*

ale_linters/typescript/tslint.vim

@@ -0,0 +1,51 @@
+" Author: Prashanth Chandra https://github.com/prashcr
+" Description: tslint for TypeScript files
+
+if exists('g:loaded_ale_linters_typescript_tslint')
+    finish
+endif
+
+let g:loaded_ale_linters_typescript_tslint = 1
+
+function! ale_linters#typescript#tslint#Handle(buffer, lines)
+    " Matches patterns like the following:
+    "
+    " hello.ts[7, 41]: trailing whitespace
+    " hello.ts[5, 1]: Forbidden 'var' keyword, use 'let' or 'const' instead
+    "
+    let pattern = '.\+.ts\[\(\d\+\), \(\d\+\)\]: \(.\+\)'
+    let output = []
+
+    for line in a:lines
+        let l:match = matchlist(line, pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        let line = l:match[1] + 0
+        let column = l:match[2] + 0
+        let type = 'E'
+        let text = l:match[3]
+
+        " vcol is Needed to indicate that the column is a character.
+        call add(output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': line,
+        \   'vcol': 0,
+        \   'col': column,
+        \   'text': text,
+        \   'type': type,
+        \   'nr': -1,
+        \})
+    endfor
+
+    return output
+endfunction
+
+call ALEAddLinter('typescript', {
+\   'name': 'tslint',
+\   'executable': 'tslint',
+\   'command': g:ale#util#stdin_wrapper . ' .ts tslint',
+\   'callback': 'ale_linters#typescript#tslint#Handle',
+\})