Use official Ruby setup GH action (#8614)

Merge pull request 8614

.github/workflows/ci.yml

@@ -59,4 +59,4 @@ jobs:
       - name: Download released earth
         run: "sudo /bin/sh -c 'wget https://github.com/earthly/earthly/releases/download/v0.5.7/earthly-linux-amd64 -O /usr/local/bin/earthly && chmod +x /usr/local/bin/earthly'"
       - name: Execute tests
-        run: earthly --build-arg RUBY=${{ matrix.ruby_version }} +style-check
+        run: earthly --build-arg RUBY=${{ matrix.ruby_version }} +style-check

.github/workflows/docs.yml

@@ -12,23 +12,16 @@ jobs:
   deploy_docs:
     if: "!contains(github.event.commits[0].message, '[ci skip]')"
     runs-on: 'ubuntu-latest'
+    env:
+      BUNDLE_PATH: "vendor/bundle"
+      BUNDLE_JOBS: 4
+      BUNDLE_RETRY: 3
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ env.RUBY_VERSION }}
-      - name: Setup cache for Bundler
-        id: cache
-        uses: actions/cache@v2.1.5
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gems-
-      - name: Set up dependencies
-        run: |
-          bundle install --path=vendor/bundle --jobs 4 --retry 3
-          bundle clean
+          bundler-cache: true
       - name: Clone target branch
         run: |
           REMOTE_BRANCH="${REMOTE_BRANCH:-gh-pages}"

.github/workflows/third-party.yml

@@ -11,6 +11,11 @@ jobs:
   build_n_profile:
     if: "!contains(github.event.commits[0].message, '[ci skip]')"
     runs-on: 'ubuntu-latest'
+    env:
+      BUNDLE_GEMFILE: "sandbox/Gemfile"
+      BUNDLE_PATH: "vendor/bundle"
+      BUNDLE_JOBS: 4
+      BUNDLE_RETRY: 3
     steps:
     - name: Checkout Jekyll
       uses: actions/checkout@v2
@@ -23,23 +28,10 @@ jobs:
         repository: ashmaroli/tomjoht.github.io
         path: sandbox
     - name: Set up Ruby
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: 2.7
-    - name: Set up Dependencies Cache
-      uses: actions/cache@v2.1.5
-      with:
-        path: sandbox/vendor/bundle
-        key: ubuntu-latest-gems-${{ hashFiles('**/Gemfile.lock') }}
-        restore-keys: |
-          ubuntu-latest-gems-
-    - name: Set up Dependencies
-      run: |
-        gem update --system --no-document
-        gem update bundler --no-document
-        bundle config gemfile sandbox/Gemfile
-        bundle config path vendor/bundle
-        bundle install --jobs 4 --retry 3
+        bundler-cache: true
     - name: Run Jekyll Build 3 times
       run: |
         bundle exec jekyll build -s sandbox -d sandbox/_site --trace