Rename the sasslinters to use the same naming conventions, and add scsslint.

ale_linters/sass/sasslint.vim

@@ -7,7 +7,7 @@ endif
 let g:loaded_ale_linters_sass_sasslint = 1
 
 call ALEAddLinter('sass', {
-\   'name': 'sassLint',
+\   'name': 'sasslint',
 \   'executable': 'sass-lint',
 \   'command': g:ale#util#stdin_wrapper . ' .sass sass-lint -v -q -f compact',
 \   'callback': 'ale#handlers#HandleCSSLintFormat',

ale_linters/scss/sasslint.vim

@@ -7,7 +7,7 @@ endif
 let g:loaded_ale_linters_scss_sasslint = 1
 
 call ALEAddLinter('scss', {
-\   'name': 'sassLint',
+\   'name': 'sasslint',
 \   'executable': 'sass-lint',
 \   'command': g:ale#util#stdin_wrapper . ' .scss sass-lint -v -q -f compact',
 \   'callback': 'ale#handlers#HandleCSSLintFormat',

ale_linters/scss/scsslint.vim

@@ -0,0 +1,49 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: This file add scsslint support for SCSS support
+
+if exists('g:loaded_ale_linters_scss_scsslint')
+    finish
+endif
+
+let g:loaded_ale_linters_scss_scsslint = 1
+
+function! ale_linters#scss#scsslint#Handle(buffer, lines)
+    " Matches patterns like the following:
+    "
+    " test.scss:2:1 [W] Indentation: Line should be indented 2 spaces, but was indented 4 spaces
+    let pattern = '^.*:\(\d\+\):\(\d*\) \[\([^\]]\+\)\] \(.\+\)$'
+    let output = []
+
+    for line in a:lines
+        let l:match = matchlist(line, pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        if !g:ale_warn_about_trailing_whitespace && l:match[4] =~# '^TrailingWhitespace'
+            " Skip trailing whitespace warnings if that option is on.
+            continue
+        endif
+
+        " vcol is needed to indicate that the column is a character
+        call add(output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': l:match[1] + 0,
+        \   'vcol': 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:match[4],
+        \   'type': l:match[3] ==# 'E' ? 'E' : 'W',
+        \   'nr': -1,
+        \})
+    endfor
+
+    return output
+endfunction
+
+call ALEAddLinter('scss', {
+\   'name': 'scsslint',
+\   'executable': 'scss-lint',
+\   'command': 'scss-lint --stdin-file-path=%s',
+\   'callback': 'ale_linters#scss#scsslint#Handle',
+\})