tests.yml in scan_left-0.3.1

- old
+ new
@@ -1,32 +1,39 @@
-# based on https://github.com/ruby/setup-ruby/blob/master/README.md
-name: Tests
-on: [push, pull_request]
+name: Main
+on:
+  pull_request:
+    branches:
+    - main
+  push:
+    branches:
+    - main
 jobs:
   ci:
     name: CI
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest ]
-        ruby: [ 2.5, 2.6, 2.7, jruby ]
-    runs-on: ${{ matrix.os }}
-    env:
-      CI: true
+        # Due to https://github.com/actions/runner/issues/849, we have to use
+        # quotes for '3.0'. Without quotes, CI runs 3.1.
+        ruby: [ jruby, truffleruby, 2.5, 2.6, 2.7, '3.0', 3.1 ]
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+
+    # Conditionally configure bundler via environment variables as advised
+    #   * https://github.com/ruby/setup-ruby#bundle-config
+    - name: Set bundler environment variables
+      run: |
+        echo "BUNDLE_WITHOUT=checks" >> $GITHUB_ENV
+      if: matrix.ruby != 3.1
+
+    # Use 'bundler-cache: true' instead of actions/cache as advised:
+    #   * https://github.com/actions/cache/blob/main/examples.md#ruby---bundler
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
-    - uses: actions/cache@v1
-      with:
-        path: vendor/bundle
-        key: bundle-use-ruby-${{ matrix.os }}-${{ matrix.ruby }}-${{ hashFiles('**/Gemfile.lock') }}
-        restore-keys: |
-          bundle-use-ruby-${{ matrix.os }}-${{ matrix.ruby }}-
-    - name: bundle install
-      run: |
-        ruby -v
-        bundle config path vendor/bundle
-        bundle install --jobs 4 --retry 3
-    - run: bundle exec rubocop
+        bundler-cache: true
+
     - run: bundle exec rspec
+
+    - run: bundle exec rubocop
+      if: matrix.ruby == 3.1