Use govet handler for gosimple, gotype, staticcheck

autoload/ale/handlers/go.vim

@@ -0,0 +1,25 @@
+" Author: neersighted <bjorn@neersighted.com>
+" Description: go vet for Go files
+"
+" Author: John Eikenberry <jae@zhar.net>
+" Description: updated to work with go1.10
+"
+" Author: Ben Paxton <ben@gn32.uk>
+" Description: moved to generic Golang file from govet
+
+function! ale#handlers#go#Handler(buffer, lines) abort
+    let l:pattern = '\v^([a-zA-Z]?:?[^:]+):(\d+):?(\d+)?:? ?(.+)$'
+    let l:output = []
+    let l:dir = expand('#' . a:buffer . ':p:h')
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        call add(l:output, {
+        \   'filename': ale#path#GetAbsPath(l:dir, l:match[1]),
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'text': l:match[4],
+        \   'type': 'E',
+        \})
+    endfor
+    return l:output
+endfunction