Add support for Elixir.

sources_non_forked/vim-elixir/compiler/credo.vim

@@ -0,0 +1,11 @@
+if exists('current_compiler')
+    finish
+endif
+let current_compiler = 'credo'
+
+if exists(":CompilerSet") != 2
+    command -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet errorformat=%f:%l:%c:\ %t:\ %m,%f:%l:\ %t:\ %m
+CompilerSet makeprg=mix\ credo\ suggest\ --format=flycheck

sources_non_forked/vim-elixir/compiler/exunit.vim

@@ -0,0 +1,25 @@
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "exunit"
+
+if exists(":CompilerSet") != 2    " older Vim always used :setlocal
+  command -nargs=* CompilerSet setlocal <args>
+endif
+
+let s:cpo_save = &cpo
+set cpo-=C
+CompilerSet makeprg=mix\ test
+CompilerSet errorformat=
+  \%E\ \ %n)\ %m,
+  \%+G\ \ \ \ \ **\ %m,
+  \%+G\ \ \ \ \ stacktrace:,
+  \%C\ \ \ \ \ %f:%l,
+  \%+G\ \ \ \ \ \ \ (%\\w%\\+)\ %f:%l:\ %m,
+  \%+G\ \ \ \ \ \ \ %f:%l:\ %.%#,
+  \**\ (%\\w%\\+)\ %f:%l:\ %m
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: nowrap sw=2 sts=2 ts=8:

sources_non_forked/vim-elixir/compiler/mix.vim

@@ -0,0 +1,16 @@
+if exists('current_compiler')
+    finish
+endif
+let current_compiler = 'mix'
+
+if exists(":CompilerSet") != 2
+    command -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet makeprg=mix\ compile
+CompilerSet errorformat=
+            \%Wwarning:\ %m,
+            \%C%f:%l,%Z,
+            \%E==\ Compilation\ error\ in\ file\ %f\ ==,
+            \%C**\ (%\\w%\\+)\ %f:%l:\ %m,%Z
+