Use the shared GitHub Actions workflows for buildpack releases

.github/workflows/prepare-release.yml

@@ -0,0 +1,23 @@
+name: Prepare Buildpack Releases
+
+on:
+  workflow_dispatch:
+    inputs:
+      bump:
+        description: "Bump"
+        required: true
+        default: 'patch'
+        type: choice
+        options:
+          - major
+          - minor
+          - patch
+
+jobs:
+  prepare-release:
+    uses: heroku/languages-github-actions/.github/workflows/_buildpacks-prepare-release.yml@main
+    with:
+      bump: ${{ inputs.bump }}
+      app_id: ${{ vars.LINGUIST_GH_APP_ID }}
+    secrets:
+      app_private_key: ${{ secrets.LINGUIST_GH_PRIVATE_KEY }}

.github/workflows/release.yml

@@ -1,80 +1,16 @@
-name: Release Buildpack
+name: Release Buildpacks
 
 on:
   workflow_dispatch:
 
-permissions:
-  contents: write
-
-env:
-  BUILDPACK_DOCKER_REPO: docker.io/heroku/buildpack-python
-  CARGO_TERM_COLOR: always
-
 jobs:
-  # Releases the buildpack to Docker Hub and registers it with the CNB Buildpack Registry.
-  # This release process intentionally does not create a .cnb file release for now, since
-  # there are currently no use-cases that need it for Python.
   release:
-    name: Release heroku/python
-    runs-on: pub-hk-ubuntu-22.04-large
-    steps:
-      # Setup
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Install musl-tools
-        run: sudo apt-get install musl-tools --no-install-recommends
-      - name: Update Rust toolchain
-        run: rustup update
-      - name: Install Rust linux-musl target
-        run: rustup target add x86_64-unknown-linux-musl
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@v2.5.1
-      - name: Install libcnb-cargo
-        run: cargo install libcnb-cargo
-      - name: Install Pack CLI
-        uses: buildpacks/github-actions/setup-pack@v5.3.0
-      - name: Install yj and crane
-        uses: buildpacks/github-actions/setup-tools@v5.3.0
-      - name: Login to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          registry: docker.io
-          username: ${{ secrets.DOCKER_HUB_USER }}
-          password: ${{ secrets.DOCKER_HUB_TOKEN }}
-
-      # Build
-      - name: Compile the buildpack
-        run: cargo libcnb package --release
-
-      # Publish
-      - name: Read buildpack metadata
-        run: |
-          echo "buildpack_id=$(yj -t < buildpack.toml | jq -r .buildpack.id)" >> $GITHUB_ENV
-          echo "buildpack_version=$(yj -t < buildpack.toml | jq -r .buildpack.version)" >> $GITHUB_ENV
-      - name: Check version is unique on Docker Hub
-        run: |
-          if docker manifest inspect "${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}" > /dev/null; then
-            echo "Duplicate version found on Docker Hub ${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}"
-            exit 1
-          fi
-      - name: Publish the buildpack to Docker Hub
-        run: pack buildpack package --path target/buildpack/release/heroku_python --publish "${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }}"
-      - name: Calculate the buildpack image digest
-        run: echo "buildpack_digest=$(crane digest ${{ env.BUILDPACK_DOCKER_REPO }}:${{ env.buildpack_version }})" >> $GITHUB_ENV
-      - name: Register the new version with the CNB Buildpack Registry
-        uses: docker://ghcr.io/buildpacks/actions/registry/request-add-entry:5.2.0
-        with:
-          token: ${{ secrets.CNB_REGISTRY_RELEASE_BOT_GITHUB_TOKEN }}
-          id: ${{ env.buildpack_id }}
-          version: ${{ env.buildpack_version }}
-          address: ${{ env.BUILDPACK_DOCKER_REPO }}@${{ env.buildpack_digest }}
-      - name: Create GitHub release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: v${{ env.buildpack_version }}
-          release_name: v${{ env.buildpack_version }}
-          body: |
-            See the [CHANGELOG](./CHANGELOG.md) for details.
-          draft: false
+    name: Release
+    uses: heroku/languages-github-actions/.github/workflows/_buildpacks-release.yml@main
+    with:
+      app_id: ${{ vars.LINGUIST_GH_APP_ID }}
+    secrets:
+      app_private_key: ${{ secrets.LINGUIST_GH_PRIVATE_KEY }}
+      cnb_registry_token: ${{ secrets.CNB_REGISTRY_RELEASE_BOT_GITHUB_TOKEN }}
+      docker_hub_user: ${{ secrets.DOCKER_HUB_USER }}
+      docker_hub_token: ${{ secrets.DOCKER_HUB_TOKEN }}

buildpack.toml

@@ -16,3 +16,8 @@ id = "heroku-20"
 
 [[stacks]]
 id = "heroku-22"
+
+[metadata]
+[metadata.release]
+[metadata.release.image]
+repository = "docker.io/heroku/buildpack-python"