ci: Add release job

.github/workflows/build.yaml

@@ -45,6 +45,7 @@ jobs:
 
   docker-image:
     name: Build and push docker image
+    needs: [test, clippy, fmt, docs]
     permissions:
       id-token: write
     runs-on: ubuntu-latest

.github/workflows/release.yaml

@@ -0,0 +1,84 @@
+name: Release pipeline
+on:
+  push:
+    tags: ['v[0-9]+.[0-9]+.[0-9]+']
+
+env:
+  RUSTFLAGS: "-D warnings"
+  RUSTDOCFLAGS: "-D warnings"
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/[email protected]
+      - run: cargo test --all-features
+
+  clippy:
+    name: Check clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/[email protected]
+        with:
+          components: clippy
+      - run: cargo clippy --all-targets -- -D warnings
+
+  fmt:
+    name: Check formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/[email protected]
+        with:
+          components: rustfmt
+      - run: cargo fmt --all -- --check
+
+  docs:
+    name: Generate docs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/[email protected]
+      - run: cargo doc --document-private-items
+
+  docker-image:
+    name: Build and push docker image
+    needs: [test, clippy, fmt, docs]
+    permissions:
+      id-token: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Cosign
+        uses: sigstore/[email protected]
+      - name: Login to Stackable Harbor
+        uses: docker/login-action@v3
+        with:
+          registry: oci.stackable.tech
+          username: robot$stackable+github-action-build
+          password: ${{ secrets.HARBOR_ROBOT_STACKABLE_GITHUB_ACTION_BUILD_SECRET }}
+      - name: Build and push docker image
+        env:
+          GITHUB_REF: ${{ github.ref }}
+        run: |
+          # trino-lb is not (yet) a product as the SDP, but a community project, so use "stackable" instead of "sdp"
+          IMAGE_NAME="oci.stackable.tech/stackable/trino-lb"
+          TAG_NAME="${GITHUB_REF#refs/tags/v}"
+
+          docker build -f docker/Dockerfile . -t "$IMAGE_NAME:$TAG_NAME"
+
+          # Store the output of `docker image push` into a variable, so we can parse it for the digest
+          PUSH_OUTPUT=$(docker image push "$IMAGE_NAME:$TAG_NAME" 2>&1)
+          echo "$PUSH_OUTPUT"
+
+          # Obtain the digest of the pushed image from the output of `docker image push`, because signing by tag is deprecated and will be removed from cosign in the future
+          DIGEST=$(echo "$PUSH_OUTPUT" | awk "/: digest: sha256:[a-f0-9]{64} size: [0-9]+$/ { print \$3 }")
+
+          # Refer to image via its digest (oci.stackable.tech/stackable/trino-dev@sha256:0a1b2c...)
+          # This generates a signature and publishes it to the registry, next to the image
+          # Uses the keyless signing flow with Github Actions as identity provider
+          cosign sign -y "$IMAGE_NAME@$DIGEST"