I broke up with neovim....vim is my best friend now

dot_vim/plugged/ale/ale_linters/scala/scalastyle.vim

@@ -0,0 +1,86 @@
+" Author: Kevin Kays - https://github.com/okkays
+" Description: Support for the scalastyle checker.
+
+call ale#Set('scala_scalastyle_options', '')
+" TODO: Remove support for the old option name in ALE 3.0.
+call ale#Set('scala_scalastyle_config',
+\   get(g:, 'ale_scalastyle_config_loc', '')
+\)
+
+function! ale_linters#scala#scalastyle#Handle(buffer, lines) abort
+    " Look for help output from scalastyle first, which indicates that no
+    " configuration file was found.
+    for l:line in a:lines[:10]
+        if l:line =~# '-c, --config'
+            return [{
+            \   'lnum': 1,
+            \   'text': '(See :help ale-scala-scalastyle)'
+            \       . ' No scalastyle configuration file was found.',
+            \}]
+        endif
+    endfor
+
+    " Matches patterns like the following:
+    "
+    " warning file=/home/blurble/Doop.scala message=Missing or badly formed ScalaDoc: Extra @param foobles line=190
+    let l:patterns = [
+    \   '^\(.\+\) .\+ message=\(.\+\) line=\(\d\+\)$',
+    \   '^\(.\+\) .\+ message=\(.\+\) line=\(\d\+\) column=\(\d\+\)$',
+    \]
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:patterns)
+        let l:args = {
+        \   'lnum': l:match[3] + 0,
+        \   'type': l:match[1] =~? 'error' ? 'E' : 'W',
+        \   'text': l:match[2]
+        \}
+
+        if !empty(l:match[4])
+            let l:args['col'] = l:match[4] + 1
+        endif
+
+        call add(l:output, l:args)
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#scala#scalastyle#GetCommand(buffer) abort
+    " Search for scalastyle config in parent directories.
+    let l:scalastyle_config = ''
+    let l:potential_configs = [
+    \   'scalastyle_config.xml',
+    \   'scalastyle-config.xml'
+    \]
+
+    for l:config in l:potential_configs
+        let l:scalastyle_config = ale#path#ResolveLocalPath(
+        \   a:buffer,
+        \   l:config,
+        \   ''
+        \)
+
+        if !empty(l:scalastyle_config)
+            break
+        endif
+    endfor
+
+    " If all else fails, try the global config.
+    if empty(l:scalastyle_config)
+        let l:scalastyle_config = ale#Var(a:buffer, 'scala_scalastyle_config')
+    endif
+
+    return 'scalastyle'
+    \ . (!empty(l:scalastyle_config) ? ' --config ' . ale#Escape(l:scalastyle_config) : '')
+    \ . ale#Pad(ale#Var(a:buffer, 'scala_scalastyle_options'))
+    \ . ' %t'
+endfunction
+
+call ale#linter#Define('scala', {
+\   'name': 'scalastyle',
+\   'executable': 'scalastyle',
+\   'output_stream': 'stdout',
+\   'command': function('ale_linters#scala#scalastyle#GetCommand'),
+\   'callback': 'ale_linters#scala#scalastyle#Handle',
+\})