ci: Refactor CI workflow with build matrix (#173)

* feat: Accept argument for `build_multi` task

Sample command:

```
rake 'build_multi[7.0,7.1]'
```

* refactor: Fetch rails tags inside the loop

* cI: Build build_multi matrix

- refactor: Loop versions in bash script

* ci: Build YJIT enabled matrix

- Remove `doc-build-latest-with-yjit` since it's covered by matrix
- switch YJIT using `RUBY_YJIT_ENABLE`

Author: toshimaru

Diff for: .github/workflows/ci.yml

@@ -9,7 +9,12 @@ on:
 jobs:
   jekyll-build:
     runs-on: ubuntu-latest
-    name: Jekyll Build
+    name: Jekyll Build (YJIT_ENABLED ${{ matrix.yjit-enabled }})
+    strategy:
+      matrix:
+        yjit-enabled: [0, 1]
+    env:
+      RUBY_YJIT_ENABLE: ${{ matrix.yjit-enabled }}
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
@@ -21,25 +26,12 @@ jobs:
 
   doc-build-latest:
     runs-on: ubuntu-latest
-    name: Rails Doc Build (latest)
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - name: fetch Rails tags
-        run: cd rails && git fetch --depth=1 origin refs/tags/v7*:refs/tags/v7*
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: 3.3
-          bundler-cache: true
-      - name: Doc Build
-        run: rake build
-
-  doc-build-latest-with-yjit:
-    runs-on: ubuntu-latest
-    name: Rails Doc Build (latest, with YJIT enabled)
+    name: Rails Doc Build (latest, YJIT_ENABLED ${{ matrix.yjit-enabled }})
+    strategy:
+      matrix:
+        yjit-enabled: [0, 1]
     env:
-      RUBY_YJIT_ENABLE: true
+      RUBY_YJIT_ENABLE: ${{ matrix.yjit-enabled }}
     steps:
       - uses: actions/checkout@v4
         with:
@@ -56,15 +48,26 @@ jobs:
   doc-build-others:
     runs-on: ubuntu-latest
     name: Rails Doc Build (older versions)
+    strategy:
+      matrix:
+        include:
+          - ruby-version: 2.7
+            build-rails-versions: "5.2,6.0,6.1"
+          - ruby-version: 3.3
+            build-rails-versions: "7.0,7.1,7.2"
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: true
       - name: fetch Rails tags
-        run: cd rails && git fetch --depth=1 origin refs/tags/v7*:refs/tags/v7* refs/tags/v6*:refs/tags/v6* refs/tags/v5*:refs/tags/v5*
+        working-directory: rails
+        run: |
+          for version in $(echo "${{ matrix.build-rails-versions }}" | tr ',' ' '); do
+            git fetch --depth=1 origin refs/tags/v${version}*:refs/tags/v${version}*
+          done
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true
       - name: Doc Build
-        run: rake build_multi
+        run: rake 'build_multi[${{ matrix.build-rails-versions }}]'

Diff for: Rakefile

@@ -21,9 +21,13 @@ task :switch_default_rails do
 end
 
 desc 'Generate and build documentation for older versions of Rails'
-task :build_multi do
-  # WORKAROUND: use `reverse_each` instead of `each` to avoid nokogiri installation error
-  config['rails_versions'].reverse_each do |version, detail|
+task :build_multi, [:versions] do |_t, args|
+  rails_versions = config['rails_versions'].reverse_each.to_h # Versions from oldest to newest
+  unless args[:versions].nil?
+    versions = args[:versions].split(',')
+    rails_versions.select! { |version, _| versions.include?(version) }
+  end
+  rails_versions.each do |version, detail|
     if detail['latest']
       puts "=== Skip Rails v#{version} because it's latest version ==="
       next
@@ -39,7 +43,7 @@ task :build_multi do
     generate_rails_rdoc
     generate_src(target_version: version)
   end
-  puts
+  puts "=== Build Jekyll site ==="
   sh 'bundle exec jekyll build'
 end