Add swiftlint syntastic checker

Author: keith

syntax_checkers/swift/swiftlint.vim

@@ -0,0 +1,39 @@
+if exists('g:loaded_syntastic_swift_swiftlint_checker')
+  finish
+endif
+let g:loaded_syntastic_swift_swiftlint_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_swift_swiftlint_GetLocList() dict
+  let env_vars = 'SCRIPT_INPUT_FILE_COUNT=1 SCRIPT_INPUT_FILE_0=' . syntastic#util#shexpand('%:p')
+  let makeprg = self.makeprgBuild({
+        \ 'exe_before': env_vars,
+        \ 'fname': '',
+        \ 'args': 'lint --use-script-input-files' })
+
+  let errorformat =
+        \ '%f:%l:%c: %trror: %m,' .
+        \ '%f:%l:%c: %tarning: %m,' .
+        \ '%f:%l: %trror: %m,' .
+        \ '%f:%l: %tarning: %m'
+
+  let env = {}
+  " let env = {
+  "       \ 'SCRIPT_INPUT_FILE_COUNT': 1,
+  "       \ 'SCRIPT_INPUT_FILE_0': syntastic#util#shexpand('%:p'),
+  "       \ }
+
+  return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'env': env })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'swift',
+    \ 'name': 'swiftlint' })
+
+let &cpo = s:save_cpo
+unlet s:save_cpo