Removed syntastic and replaced it with ale

Read more here:
https://github.com/w0rp/ale

sources_non_forked/ale/ale_linters/yaml/swaglint.vim

@@ -0,0 +1,49 @@
+" Author: Matthew Turland <https://github.com/elazar>
+" Description: This file adds support for linting Swagger / OpenAPI documents using swaglint
+
+call ale#Set('yaml_swaglint_executable', 'swaglint')
+call ale#Set('yaml_swaglint_use_global', 0)
+
+function! ale_linters#yaml#swaglint#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'yaml_swaglint', [
+    \   'node_modules/.bin/swaglint',
+    \])
+endfunction
+
+function! ale_linters#yaml#swaglint#GetCommand(buffer) abort
+    return ale_linters#yaml#swaglint#GetExecutable(a:buffer)
+    \    . ' -r compact --stdin'
+endfunction
+
+function! ale_linters#yaml#swaglint#Handle(buffer, lines) abort
+    let l:pattern = ': \([^\s]\+\) @ \(\d\+\):\(\d\+\) - \(.\+\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:obj = {
+        \   'type': l:match[1] is# 'error' ? 'E' : 'W',
+        \   'lnum': l:match[2] + 0,
+        \   'col': l:match[3] + 0,
+        \   'text': l:match[4],
+        \}
+
+        " Parse the code if it's there.
+        let l:code_match = matchlist(l:obj.text, '\v^(.+) \(([^ (]+)\)$')
+
+        if !empty(l:code_match)
+            let l:obj.text = l:code_match[1]
+            let l:obj.code = l:code_match[2]
+        endif
+
+        call add(l:output, l:obj)
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('yaml', {
+\   'name': 'swaglint',
+\   'executable_callback': 'ale_linters#yaml#swaglint#GetExecutable',
+\   'command_callback': 'ale_linters#yaml#swaglint#GetCommand',
+\   'callback': 'ale_linters#yaml#swaglint#Handle',
+\})

sources_non_forked/ale/ale_linters/yaml/yamllint.vim

@@ -0,0 +1,48 @@
+" Author: KabbAmine <amine.kabb@gmail.com>
+
+let g:ale_yaml_yamllint_executable =
+\   get(g:, 'ale_yaml_yamllint_executable', 'yamllint')
+
+let g:ale_yaml_yamllint_options =
+\   get(g:, 'ale_yaml_yamllint_options', '')
+
+function! ale_linters#yaml#yamllint#GetExecutable(buffer) abort
+    return ale#Var(a:buffer, 'yaml_yamllint_executable')
+endfunction
+
+function! ale_linters#yaml#yamllint#GetCommand(buffer) abort
+    return ale_linters#yaml#yamllint#GetExecutable(a:buffer)
+    \   . ' ' . ale#Var(a:buffer, 'yaml_yamllint_options')
+    \   . ' -f parsable %t'
+endfunction
+
+function! ale_linters#yaml#yamllint#Handle(buffer, lines) abort
+    " Matches patterns line the following:
+    " 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>'
+    let l:pattern = '^.*:\(\d\+\):\(\d\+\): \[\(error\|warning\)\] \(.\+\)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:line = l:match[1] + 0
+        let l:col = l:match[2] + 0
+        let l:type = l:match[3]
+        let l:text = l:match[4]
+
+        call add(l:output, {
+        \   'lnum': l:line,
+        \   'col': l:col,
+        \   'text': l:text,
+        \   'type': l:type is# 'error' ? 'E' : 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('yaml', {
+\   'name': 'yamllint',
+\   'executable_callback': 'ale_linters#yaml#yamllint#GetExecutable',
+\   'command_callback': 'ale_linters#yaml#yamllint#GetCommand',
+\   'callback': 'ale_linters#yaml#yamllint#Handle',
+\})