java/.github/workflows/bazel.yml at master · kubernetes-client/java · GitHub

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# Build and test the library with Bazel.
#
# Bazel's built-in action caching combined with GitHub Actions cache gives
# incremental builds: only changed targets and their dependents are rebuilt.
#
# Cache layers used:
#   1. Repository cache   – downloaded JARs / external repositories
#   2. Disk cache         – action output cache (build artifacts)
# Both are saved to GitHub Actions cache keyed on the OS, Bazel module lock,
# and Maven artifact list so cache hits are maximized across identical runs.

name: bazel

on:
  push:
    branches: ["master", "release-**"]
    paths:
      - "**/*.java"
      - "**/BUILD.bazel"
      - "MODULE.bazel"
      - ".bazelversion"
      - ".bazelrc"
      - ".github/workflows/bazel.yml"
  pull_request:
    branches: ["master", "release-**"]
    paths:
      - "**/*.java"
      - "**/BUILD.bazel"
      - "MODULE.bazel"
      - ".bazelversion"
      - ".bazelrc"
      - ".github/workflows/bazel.yml"

jobs:
  bazel-build-test:
    name: Bazel build & test (Java ${{ matrix.java }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        java: ["11", "17", "21"]
    env:
      BAZELISK_SKIP_VERSION_CHECK: "1"

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Set up Java ${{ matrix.java }}
        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
        with:
          distribution: temurin
          java-version: ${{ matrix.java }}

      # Install Bazelisk which reads the pinned version from .bazelversion.
      # Install into $HOME/.local/bin (no root required) and add it to PATH.
      - name: Install Bazelisk
        run: |
          mkdir -p "$HOME/.local/bin"
          curl -fsSL \
            https://github.com/bazelbuild/bazelisk/releases/download/v1.24.1/bazelisk-linux-amd64 \
            -o "$HOME/.local/bin/bazel"
          chmod +x "$HOME/.local/bin/bazel"
          echo "$HOME/.local/bin" >> "$GITHUB_PATH"

      # ----------------------------------------------------------------
      # Cache layers
      # The disk cache stores compiled action outputs; the repository cache
      # stores downloaded external files (JARs, etc.).
      # ----------------------------------------------------------------
      - name: Restore Bazel caches
        id: bazel-cache
        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
        with:
          path: |
            ~/.cache/bazel-disk-cache
            ~/.cache/bazel/cache/repos/v1
          key: bazel-${{ runner.os }}-java${{ matrix.java }}-${{ hashFiles('MODULE.bazel', '.bazelversion', 'maven_install.json') }}
          restore-keys: |
            bazel-${{ runner.os }}-java${{ matrix.java }}-
            bazel-${{ runner.os }}-

      # Re-generate the Maven lock file so it is always consistent with
      # MODULE.bazel.  The __INPUT_ARTIFACTS_HASH in the committed file is
      # intentionally set to -1 to signal that the file needs to be regenerated;
      # REPIN=1 overwrites it with the correct value.  Once the artifact list
      # stabilises, subsequent runs where MODULE.bazel has not changed are fast
      # because rules_jvm_external short-circuits on an identical artifact list.
      - name: Pin Maven dependencies
        run: REPIN=1 bazel run @maven//:pin

      # ----------------------------------------------------------------
      # Build all core modules
      # ----------------------------------------------------------------
      - name: Build
        run: |
          bazel build --config=ci \
            //kubernetes:client-java-api \
            //proto:client-java-proto \
            //util:client-java \
            //fluent:client-java-api-fluent \
            //extended:client-java-extended

      # Spring modules require Java 17+; skip them on the Java 11 matrix leg.
      - name: Build Spring modules (Java 17+)
        if: matrix.java != '11'
        run: |
          bazel build --config=ci \
            //spring:client-java-spring-integration \
            //spring-aot:client-java-spring-aot-integration

      # ----------------------------------------------------------------
      # Test — run per-module test suites
      # ----------------------------------------------------------------
      - name: Test core modules
        run: |
          bazel test --config=ci \
            //kubernetes:tests \
            //util:tests \
            //extended:tests

      - name: Test Spring modules (Java 17+)
        if: matrix.java != '11'
        run: |
          bazel test --config=ci \
            //spring:tests