Serialize makers - Fixes neovim#22

autoload/neomake.vim

@@ -201,6 +201,7 @@ function! neomake#Make(options) abort
         let b:neomake_signs = {}
     endif
 
+    let serialize = get(g:, 'neomake_serialize')
     for name in enabled_makers
         if name ==# 'makeprg'
             call neomake#MakeJob()
@@ -223,8 +224,16 @@ function! neomake#Make(options) abort
                 let maker['tempfile'] = makepath
                 let maker['tempsuffix'] = tempsuffix
             endif
+            if serialize && len(enabled_makers) > 1
+                let next_opts = copy(a:options)
+                let next_opts['enabled_makers'] = enabled_makers[1:]
+                let maker['next'] = next_opts
+            endif
             call neomake#MakeJob(maker)
         endif
+        if serialize
+            break
+        endif
     endfor
 endfunction
 
@@ -412,6 +421,13 @@ function! neomake#MakeHandler(...) abort
         endif
         " Show the current line's error
         call neomake#CursorMoved()
+
+        " TODO when neovim implements getting the exit status of a job, add
+        " option to only run next checkers if this one succeeded.
+        if has_key(maker, 'next')
+            call neomake#utils#DebugMessage('Neomake: next makers ['.join(maker.next.enabled_makers, ', ').']')
+            call neomake#Make(maker.next)
+        endif
     endif
 endfunction
 

doc/neomake.txt

@@ -114,6 +114,12 @@ Setting this to 1 allows neomake to check unsaved changes. Set to 0 by
 default. This setting does nothing when running |:Neomake!| (in other words,
 it is only active when running |:Neomake|).
 
+*g:neomake_serialize*
+Setting this to 1 tells neomake to run each enabled maker one after the other.
+This is a good way to ensure messages don't get mixed up. When Neovim's
+|job-control| feature implements a way to get the exit status of a job, an
+option will be added to stop after the first failing job as well.
+
 *g:neomake_verbose*
 Controls how verbose neomake should be. Neomake log levels are as follows:
     0 - Errors only