1 files changed, 53 insertions, 0 deletions
diff --git a/dotfiles/.vim/autoload/neomake/makers/ft/elm.vim b/dotfiles/.vim/autoload/neomake/makers/ft/elm.vim
new file mode 100644
index 0000000..fe1d2f6
--- /dev/null
+++ b/dotfiles/.vim/autoload/neomake/makers/ft/elm.vim
@@ -0,0 +1,53 @@
+" vim: ts=4 sw=4 et
+
+function! neomake#makers#ft#elm#EnabledMakers() abort
+    return ['elmMake']
+endfunction
+
+function! neomake#makers#ft#elm#elmMake() abort
+    return {
+        \ 'exe': 'elm-make',
+        \ 'args': ['--report=json', '--output=' . g:neomake#compat#dev_null],
+        \ 'process_output': function('neomake#makers#ft#elm#ElmMakeProcessOutput')
+        \ }
+endfunction
+
+function! neomake#makers#ft#elm#ElmMakeProcessOutput(context) abort
+    let errors = []
+    " output will be a List, containing either:
+    " 1) A success message
+    " 2) A string holding a JSON array for both warnings and errors
+
+    for line in a:context.output
+        if line[0] ==# '['
+            let decoded = neomake#compat#json_decode(line)
+            for item in decoded
+                if get(item, 'type', '') ==# 'warning'
+                    let code = 'W'
+                else
+                    let code = 'E'
+                endif
+
+                let compiler_error = item['tag']
+                let message = item['overview']
+                let filename = item['file']
+                let region_start = item['region']['start']
+                let region_end = item['region']['end']
+                let row = region_start['line']
+                let col = region_start['column']
+                let length = region_end['column'] - region_start['column']
+
+                let error = {
+                            \ 'text': compiler_error . ' : ' . message,
+                            \ 'type': code,
+                            \ 'lnum': row,
+                            \ 'col': col,
+                            \ 'length': length,
+                            \ 'filename': filename,
+                            \ }
+                call add(errors, error)
+            endfor
+        endif
+    endfor
+    return errors
+endfunction