Add a new beautifier SassConvert for CSS, SCSS and Sass

.travis.yml

@@ -86,6 +86,8 @@ before_install:
   - gem install rubocop
   - gem install htmlbeautifier
   - gem install puppet-lint
+  # Sass language support
+  - gem install sass
   # Python language support
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install python; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo chmod 777 -R /opt/python; fi

appveyor.yml

@@ -93,6 +93,9 @@ install:
   # Puppet-Lint
   - gem install puppet-lint
   - where puppet-lint
+  # Sass
+  - gem install sass
+  - where sass-convert
 
   # emacs
   - cinst emacs -y

src/beautifiers/index.coffee

@@ -62,6 +62,7 @@ module.exports = class Beautifiers extends EventEmitter
     'rubocop'
     'ruby-beautify'
     'rustfmt'
+    'sass-convert'
     'sqlformat'
     'stylish-haskell'
     'tidy-markdown'

src/beautifiers/sass-convert.coffee

@@ -0,0 +1,20 @@
+"use strict"
+Beautifier = require('./beautifier')
+
+module.exports = class SassConvert extends Beautifier
+  name: "SassConvert"
+  link: "http://sass-lang.com/documentation/file.SASS_REFERENCE.html#syntax"
+
+  options:
+    # TODO: Add support for options
+    CSS: false
+    Sass: false
+    SCSS: false
+
+  beautify: (text, language, options, context) ->
+    lang = language.toLowerCase()
+
+    @run("sass-convert", [
+      @tempFile("input", text),
+      "--from", lang, "--to", lang
+    ])