Rerwrite in JavaScript

We-re maintaining our own fork of CSSLink because we need to make some
changes to make the output compatible with the Spec. This makes CSSLint
updates hard and as a result the engine lags behind the upstream.

CSSLint provides APIs that we can use directly to augment output but
they're only exposed in JavaScript. This rewrite is targeted towards
using the upstream CSSLint and only maintaining the custom parts that in
the engine. This should make CSSLint updates trivial as long as the API
stays stable.

As a bonus it drops Ruby from dependencies making the overal image
smaller.

Author: pointlessone

.codeclimate.yml

@@ -1,8 +1,7 @@
 engines:
-  rubocop:
+  eslint:
     enabled: true
-ratings:
-  paths:
-  - "**.rb"
+    channel: eslint-4
 exclude_paths:
-  - spec/**/*
+  - test/**/*
+  - node_modules/**/*

.dockerignore

@@ -1,2 +1,3 @@
 .git
 Makefile
+node_modules

.eslintrc

@@ -0,0 +1,32 @@
+{
+  "env": {
+    "node": true,
+    "mocha": true,
+    "es6": true
+  },
+  "rules": {
+    "block-spacing": 2,
+    "brace-style": [2, "1tbs", { "allowSingleLine": true }],
+    "comma-dangle": [2, "never"],
+    "comma-style": [2, "first", { exceptions: {ArrayExpression: true, ObjectExpression: true} }],
+    "complexity": [2, 6],
+    "curly": 2,
+    "eqeqeq": [2, "allow-null"],
+    "max-statements": [2, 30],
+    "no-shadow-restricted-names": 2,
+    "no-undef": 2,
+    "no-use-before-define": 2,
+    "radix": 2,
+    "semi": 2,
+    "space-infix-ops": 2,
+    "strict": 0
+  },
+  "globals": {
+    "AnalysisView": true,
+    "PollingView": true,
+    "Prism": true,
+    "Spinner": true,
+    "Timer": true,
+    "moment": true
+  }
+}

.gitignore

@@ -0,0 +1 @@
+node_modules/

.rubocop.yml

@@ -1,17 +1,16 @@
-FROM codeclimate/alpine-ruby:b38
+FROM node:alpine
+
+RUN adduser -u 9000 -D app
 
 WORKDIR /usr/src/app
-COPY Gemfile /usr/src/app/
-COPY Gemfile.lock /usr/src/app/
 
-RUN apk --update add nodejs git zlib zlib-dev ruby ruby-dev ruby-bundler less build-base && \
-    bundle install -j 4 && \
-    apk del --purge build-base zlib zlib-dev && rm -fr /usr/share/ri
+COPY package.json yarn.lock ./
 
-ENV CSSLINT_SHA=87aa604a4cbc5125db979576f1b09b35980fcf08
-RUN npm install -g codeclimate/csslint.git#$CSSLINT_SHA
+RUN yarn install && \
+  chown -R app:app ./
+
+COPY . ./
 
-RUN adduser -u 9000 -D app
 USER app
 
 COPY . /usr/src/app

.ruby-version

@@ -4,4 +4,4 @@ image:
 	docker build -t codeclimate/codeclimate-csslint .
 
 test: image
-	docker run --rm codeclimate/codeclimate-csslint rspec $(RSPEC_ARGS)
+	docker run --rm codeclimate/codeclimate-csslint npm run test

Dockerfile

@@ -1,14 +1,10 @@
-#!/usr/bin/env ruby
-$LOAD_PATH.unshift(File.expand_path(File.join(File.dirname(__FILE__), "../lib")))
+#!/usr/local/bin/node --expose-gc
 
-require 'cc/engine/csslint'
+const fs = require("fs");
+const Engine = require("../lib/csslint");
 
-if File.exists?("/config.json")
-  engine_config = JSON.parse(File.read("/config.json"))
-else
-  engine_config = {}
-end
+const CONFIG_PATH = "/config.json";
+let config = JSON.parse(fs.readFileSync(CONFIG_PATH));
 
-CC::Engine::CSSlint.new(
-  directory: "/code", engine_config: engine_config, io: STDOUT
-).run
+const CODE_DIR = "/code";
+new Engine(CODE_DIR, console, config).run();

Gemfile

@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+$LOAD_PATH.unshift(File.expand_path(File.join(File.dirname(__FILE__), "../lib")))
+
+require 'cc/engine/csslint'
+
+if File.exists?("/config.json")
+  engine_config = JSON.parse(File.read("/config.json"))
+else
+  engine_config = {}
+end
+
+CC::Engine::CSSlint.new(
+  directory: "/code", engine_config: engine_config, io: STDOUT
+).run