From 73c9a1f96539481536de56fa2bd4c005c1af15ed Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Tue, 25 Oct 2016 14:09:58 +0100
Subject: [PATCH] #148 Do not run ALE for NERDTree or Unite.vim buffers.

---
 plugin/ale.vim | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/plugin/ale.vim b/plugin/ale.vim
index 289a9d9..64c20c6 100644
--- a/plugin/ale.vim
+++ b/plugin/ale.vim
@@ -7,6 +7,7 @@
 if exists('g:loaded_ale')
     finish
 endif
+
 let g:loaded_ale = 1
 
 " A flag for detecting if the required features are set.
@@ -28,6 +29,19 @@ let g:ale_buffer_info = {}
 
 " User Configuration
 
+" This option prevents ALE autocmd commands from being run for particular
+" filetypes which can cause issues.
+let g:ale_filetype_blacklist = ['nerdtree', 'unite']
+
+" This function lets you define autocmd commands which blacklist particular
+" filetypes.
+function! ALEAutoCMD(events, function_call)
+    execute 'autocmd '
+    \   . a:events
+    \   ' * if index(g:ale_filetype_blacklist, &filetype) < 0 | call '
+    \   . a:function_call
+endfunction
+
 " This Dictionary configures which linters are enabled for which languages.
 let g:ale_linters = get(g:, 'ale_linters', {})
 
@@ -45,7 +59,7 @@ let g:ale_lint_on_text_changed = get(g:, 'ale_lint_on_text_changed', 1)
 if g:ale_lint_on_text_changed
     augroup ALERunOnTextChangedGroup
         autocmd!
-        autocmd TextChanged,TextChangedI * call ale#Queue(g:ale_lint_delay)
+        call ALEAutoCMD('TextChanged,TextChangedI', 'ale#Queue(g:ale_lint_delay)')
     augroup END
 endif
 
@@ -54,7 +68,7 @@ let g:ale_lint_on_enter = get(g:, 'ale_lint_on_enter', 1)
 if g:ale_lint_on_enter
     augroup ALERunOnEnterGroup
         autocmd!
-        autocmd BufEnter,BufRead * call ale#Queue(100)
+        call ALEAutoCMD('BufEnter,BufRead', 'ale#Queue(100)')
     augroup END
 endif
 
@@ -63,7 +77,7 @@ let g:ale_lint_on_save = get(g:, 'ale_lint_on_save', 0)
 if g:ale_lint_on_save
     augroup ALERunOnSaveGroup
         autocmd!
-        autocmd BufWrite * call ale#Queue(0)
+        call ALEAutoCMD('BufWrite', 'ale#Queue(0)')
     augroup END
 endif
 
@@ -100,7 +114,7 @@ let g:ale_echo_cursor = get(g:, 'ale_echo_cursor', 1)
 if g:ale_echo_cursor
     augroup ALECursorGroup
         autocmd!
-        autocmd CursorMoved,CursorHold * call ale#cursor#EchoCursorWarningWithDelay()
+        call ALEAutoCMD('CursorMoved,CursorHold', 'ale#cursor#EchoCursorWarningWithDelay()')
     augroup END
 endif
 
@@ -122,7 +136,7 @@ let g:ale_warn_about_trailing_whitespace =
 augroup ALECleanupGroup
     autocmd!
     " Clean up buffers automatically when they are unloaded.
-    autocmd BufUnload * call ale#cleanup#Buffer(expand('<abuf>'))
+    call ALEAutoCMD('BufUnload', "ale#cleanup#Buffer(expand('<abuf>'))")
 augroup END
 
 " Backwards Compatibility