From 06f61eeeb82f30c0fceea3d1abb231378b445fc3 Mon Sep 17 00:00:00 2001
From: w0rp <devw0rp@gmail.com>
Date: Sun, 1 Jul 2018 13:49:40 +0100
Subject: Respect ale_warn_about_trailing_whitespace for yamllint

---
 ale_linters/yaml/yamllint.vim            |  6 ++++++
 test/handler/test_yamllint_handler.vader | 34 +++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/ale_linters/yaml/yamllint.vim b/ale_linters/yaml/yamllint.vim
index 9e075a75..f100667e 100644
--- a/ale_linters/yaml/yamllint.vim
+++ b/ale_linters/yaml/yamllint.vim
@@ -34,6 +34,12 @@ function! ale_linters#yaml#yamllint#Handle(buffer, lines) abort
         let l:code_match = matchlist(l:item.text, '\v^(.+) \(([^)]+)\)$')
 
         if !empty(l:code_match)
+            if l:code_match[2] is# 'trailing-spaces'
+            \&& !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
+                " Skip warnings for trailing whitespace if the option is off.
+                continue
+            endif
+
             let l:item.text = l:code_match[1]
             let l:item.code = l:code_match[2]
         endif
diff --git a/test/handler/test_yamllint_handler.vader b/test/handler/test_yamllint_handler.vader
index 5ba14bc8..1aa0b9f5 100644
--- a/test/handler/test_yamllint_handler.vader
+++ b/test/handler/test_yamllint_handler.vader
@@ -1,10 +1,18 @@
 Before:
+  Save g:ale_warn_about_trailing_whitespace
+
+  let g:ale_warn_about_trailing_whitespace = 1
+
   runtime! ale_linters/yaml/yamllint.vim
 
 After:
+  Restore
+
+  unlet! b:ale_warn_about_trailing_whitespace
+
   call ale#linter#Reset()
 
-Execute:
+Execute(Problems should be parsed correctly for yamllint):
   AssertEqual
   \ [
   \   {
@@ -25,3 +33,27 @@ Execute:
   \   'something.yaml:1:1: [warning] missing document start "---" (document-start)',
   \   'something.yml:2:1: [error] syntax error: expected the node content, but found ''<stream end>''',
   \ ])
+
+Execute(The yamllint handler should respect ale_warn_about_trailing_whitespace):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 5,
+  \     'col': 18,
+  \     'type': 'E',
+  \     'text': 'trailing spaces',
+  \     'code': 'trailing-spaces',
+  \   },
+  \ ],
+  \ ale_linters#yaml#yamllint#Handle(bufnr(''), [
+  \   'something.yml:5:18: [error] trailing spaces (trailing-spaces)',
+  \ ])
+
+  let b:ale_warn_about_trailing_whitespace = 0
+
+  AssertEqual
+  \ [
+  \ ],
+  \ ale_linters#yaml#yamllint#Handle(bufnr(''), [
+  \   'something.yml:5:18: [error] trailing spaces (trailing-spaces)',
+  \ ])
-- 
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