Add Heroku-24 and ARM support (#33)

- Rewrites the project to use a pre-built JRuby binary. Links to downloads are at https://www.jruby.org/download.
- Adds the heroku-24 base image as a build target
- Re-uses the ARM url format for S3 that was introduced in heroku/docker-heroku-ruby-builder#38. Both the Ruby classic buildpack and CNB are tightly coupled to this format and will attempt to download binaries from S3 with cpu architecture information on heroku-24. Once built and uploaded to S3 there should be no changes needed to the buildpack to acquire support for heroku-24 and ARM due to:
  - heroku/heroku-buildpack-ruby#1439
  - heroku/buildpacks-ruby#284

.github/workflows/build_jruby.yml

@@ -28,31 +28,24 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        stack: ["heroku-20", "heroku-22"]
+        base_image: ["heroku-20", "heroku-22", "heroku-24"]
     env:
-      STACK: ${{ matrix.stack }}
+      BASE_IMAGE: ${{ matrix.base_image }}
     runs-on: pub-hk-ubuntu-22.04-xlarge
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
-      - name: Set up system to run build scripts
-        uses: ruby/setup-ruby@ec02537da5712d66d4d50a0f33b7eb52773b5ed1
-        with:
-          ruby-version: '3.1'
-      - name: Install dependencies
-        run: bundle install
+        uses: actions/checkout@v4
+      - name: Print changelog
+        run: bin/print_changelog ${{ inputs.jruby_version }} | tee $GITHUB_STEP_SUMMARY
       - name: Build Docker image
-        run: bundle exec rake "generate_image[$STACK]"
-      - name: Generate JRuby Dockerfile
-        run: bundle exec rake "new[${{ inputs.jruby_version }},$STACK]"
+        run: bin/activate_docker $BASE_IMAGE
       - name: Build and package JRuby runtime
-        run: bash "rubies/$STACK/jruby-${{ inputs.jruby_version }}.sh"
+        run: bin/build_jruby $BASE_IMAGE ${{ inputs.jruby_version }}
+      - name: Test JRuby runtime
+        run: bin/print_summary $BASE_IMAGE ${{ inputs.jruby_version }} | tee $GITHUB_STEP_SUMMARY
       - name: Upload JRuby runtime archive to S3 dry run
         if: (inputs.dry_run)
         run: aws s3 sync ./builds "s3://${S3_BUCKET}" --dryrun
       - name: Upload JRuby runtime archive to S3 production
         if: (!inputs.dry_run)
         run: aws s3 sync ./builds "s3://${S3_BUCKET}"
-      - name: Output CHANGELOG
-        if: (!inputs.dry_run)
-        run: bundle exec rake "changelog[${{inputs.jruby_version}}]"

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: CI
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Run ShellCheck
+        run: |
+            shellcheck *.sh -x &&
+            shellcheck bin/* -x
+
+  integration_test:
+    runs-on: ${{ matrix.arch == 'arm64' && 'pub-hk-ubuntu-22.04-arm-large' || 'ubuntu-latest' }}
+    strategy:
+      fail-fast: false
+      matrix:
+        base_image: ["heroku-20", "heroku-22", "heroku-24"]
+        jruby_version: ["9.4.7.0"]
+        arch: ["amd64", "arm64"]
+        exclude:
+          - base_image: "heroku-20"
+            arch: "arm64"
+          - base_image: "heroku-22"
+            arch: "arm64"
+    env:
+      BASE_IMAGE: ${{ matrix.base_image }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Docker and missing development libs (ARM64 only)
+        if: matrix.arch == 'arm64'
+        run: |
+          sudo apt-get update --error-on=any
+          sudo apt-get install -y --no-install-recommends acl docker.io docker-buildx libc6-dev
+          sudo usermod -aG docker $USER
+          sudo setfacl --modify user:$USER:rw /var/run/docker.sock
+      - name: Print changelog
+        run: bin/print_changelog ${{ matrix.jruby_version }} | tee $GITHUB_STEP_SUMMARY
+      - name: Build Docker image
+        run: bin/activate_docker ${{ matrix.base_image }}
+      - name: Build and package JRuby runtime
+        run: bin/build_jruby ${{ matrix.base_image }} ${{ matrix.jruby_version }}
+      - name: Test JRuby runtime with ARCH
+        if: matrix.base_image == 'heroku-24'
+        run: bin/print_summary ${{ matrix.base_image }} ${{ matrix.jruby_version }} ${{ matrix.arch }}
+      - name: Test JRuby runtime without ARCH
+        if: matrix.base_image != 'heroku-24'
+        run: bin/print_summary ${{ matrix.base_image }} ${{ matrix.jruby_version }}

.gitignore

@@ -3,5 +3,6 @@ builds/
 cache/
 vendor/bundle/
 .env
-bin/
 .DS_Store
+Dockerfile
+rubies/