Chore: Switch from Circle to Github Actions for CI (#4734)

Because:
- It's _slightly_ faster
- The configuration is more approachable
- We get unlimited free usage since the repo is public

This commit:
- Adds a GitHub actions workflow for running our linters and tests
- Adds bin stubs for rubocop, erblint and rspec

.github/workflows/ci.yml

@@ -0,0 +1,91 @@
+name: CI
+
+on:
+  pull_request:
+    branches: ["*"]
+  push:
+    branches: [main]
+
+concurrency: ci-${{ github.ref }}
+
+jobs:
+  linters:
+    name: Linters
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby and install gems
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: yarn
+
+      - name: Install packages
+        run: |
+          yarn install --pure-lockfile
+
+      - name: Run linters
+        run: |
+          bin/rubocop --parallel
+          bin/erblint --lint-all
+          yarn run eslint
+
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:15.7
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_DB: theodinproject_test
+          POSTGRES_PASSWORD: "password"
+        ports: ["5432:5432"]
+
+      redis:
+        image: redis
+        ports: ["6379:6379"]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby and install gems
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: yarn
+
+      - name: Install packages
+        run: |
+          yarn install --pure-lockfile
+
+      - name: Build assets
+        run: |
+          bin/rails javascript:build
+          bin/rails css:build
+
+      - name: Setup test database
+        env:
+          RAILS_ENV: test
+          DATABASE_URL: postgres://postgres:password@localhost:5432/theodinproject_test
+        run: |
+          bin/rails db:schema:load
+
+      - name: Run tests
+        env:
+          RAILS_ENV: test
+          DATABASE_URL: postgres://postgres:password@localhost:5432/theodinproject_test
+        run: bin/rspec

README.md

@@ -19,7 +19,7 @@ Our community can be found on the [TOP Discord server](https://discord.gg/fbFCkY
 
 ## Contributing
 
-[![Build Status](https://circleci.com/gh/TheOdinProject/theodinproject.svg?style=svg)](https://app.circleci.com/pipelines/github/TheOdinProject/theodinproject)
+![Build status](https://github.com/TheOdinProject/theodinproject/actions/workflows/ci.yml/badge.svg)
 
 The Odin Project depends on open-source contributions to improve, grow, and thrive. We welcome contributors of all experience levels and backgrounds to help maintain this awesome curriculum and community. If you would like to contribute to our curriculum, be sure to thoroughly read our [contributing guide](https://github.com/TheOdinProject/theodinproject/blob/main/CONTRIBUTING.md).
 

bin/erblint

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'erblint' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("erb_lint", "erblint")

bin/rspec

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rspec' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rspec-core", "rspec")

bin/rubocop

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rubocop' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+load Gem.bin_path("rubocop", "rubocop")

spec/support/precompile_assets.rb

@@ -3,6 +3,11 @@
     examples = RSpec.world.filtered_examples.values.flatten
     has_no_system_tests = examples.none? { |example| example.metadata[:type] == :system }
 
+    if ENV['CI']
+      $stdout.puts "\n🚀️️  CI detected. Skip assets compilation.\n"
+      next
+    end
+
     if has_no_system_tests
       $stdout.puts "\n🚀️️  No system test selected. Skip assets compilation.\n"
       next
@@ -14,7 +19,7 @@
     start = Time.current
     begin
       $stdout.reopen(File.new('/dev/null', 'w'))
-      system('bin/rails assets:precompile')
+      system('bin/rails test:prepare') # invokes css:build and javascript:build
     ensure
       $stdout.reopen(original_stdout)
       $stdout.puts "Finished in #{(Time.current - start).round(2)} seconds"