[Stacked] Print getting started guides in CI

.github/workflows/ci.yml

@@ -96,3 +96,71 @@ jobs:
         working-directory: ${{ matrix.buildpack-directory }}
         # Runs only tests annotated with the `ignore` attribute (which in this repo, are the integration tests).
         run: cargo test --locked -- --ignored --test-threads 16
+
+  print-pack-getting-started-output:
+    runs-on: ${{ matrix.target == 'aarch64-unknown-linux-musl' && 'pub-hk-ubuntu-24.04-arm-medium' || 'ubuntu-24.04' }}
+    strategy:
+      matrix:
+        target: ["aarch64-unknown-linux-musl", "x86_64-unknown-linux-musl"]
+        guide: ["heroku/java-getting-started", "heroku/gradle-getting-started", "heroku/scala-getting-started"]
+      fail-fast: false
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Install musl-tools
+        run: sudo apt-get install -y --no-install-recommends musl-tools
+      - name: Update Rust toolchain
+        run: rustup update
+      - name: Install Rust linux-musl target
+        run: rustup target add ${{ matrix.target }}
+      - name: Rust Cache
+        uses: Swatinem/[email protected]
+      - name: Install Pack CLI
+        uses: buildpacks/github-actions/[email protected]
+      - name: Pull builder and run images
+        run: |
+          docker pull "heroku/builder:24"
+          docker pull "heroku/heroku:24"
+      - name: Clone getting started guide
+        uses: actions/checkout@v4
+        with:
+          repository: ${{ matrix.guide }}
+          path: tmp/guide
+      - name: Install libcnb-cargo for `cargo libcnb package` command
+        run: cargo install libcnb-cargo
+      - name: Compile buildpack
+        run: cargo libcnb package --target ${{ matrix.target }}
+      - name: "PRINT: Getting started guide output"
+        run: |
+          set -euo pipefail
+
+          PACK_CMD="pack build my-image --force-color --builder heroku/builder:24 --trust-extra-buildpacks --path tmp/guide --pull-policy never "
+          case "${{ matrix.guide }}" in
+            "heroku/java-getting-started")
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_jvm "
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_java "
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_maven "
+              ;;
+            "heroku/gradle-getting-started")
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_jvm "
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_gradle "
+              ;;
+            "heroku/scala-getting-started")
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_jvm "
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_sbt "
+              PACK_CMD+=" --buildpack packaged/${{ matrix.target }}/debug/heroku_scala "
+              ;;
+            *)
+              echo "Unknown guide: ${{ matrix.guide }}"
+              exit 1
+              ;;
+          esac
+
+          echo "Running command: $PACK_CMD"
+          bash -c "$PACK_CMD"
+          echo ""
+          echo "With CACHE example"
+          echo ""
+          bash -c "$PACK_CMD"

CONTRIBUTING.md

@@ -50,6 +50,20 @@ This buildpack relies on [heroku/libcnb.rs][libcnb] to compile buildpacks. All
 [libcnb.rs dependencies][libcnb-deps] will need to be setup prior to building
 or testing this buildpack.
 
+### Clone
+
+This project uses submodules, to clone all code run:
+
+```
+$ git clone --recursive https://github.com/heroku/buildpacks-jvm
+```
+
+When working on a branch you may need to run:
+
+```
+$ git submodule update --init --remote --recursive
+``
+
 ### Building
 
 1. Run `cargo check` to download dependencies and ensure there are no

buildpacks/jvm/CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - JDK overlays are now properly sourced from the `.jdk-overlay` directory instead of `.jdk_overlay`. ([#763](https://github.com/heroku/buildpacks-jvm/pull/763))
 
+### Changed
+
+- Buildpack output changed to a new format. ([#000](https://github.com/heroku/buildpacks-jvm/pull/000))
+
 ## [6.0.4] - 2024-12-05
 
 ### Added