.github/workflows/build-reusable.yaml

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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
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# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

name: build-reusable

on:
  workflow_call:
    inputs:
      develocity-enabled:
        description: Enable Develocity Build Scan publication
        default: false
        type: boolean
      java-version:
        description: The Java compiler version
        default: 17
        type: string
      maven-args:
        description: Additional Maven arguments
        type: string
      reproducibility-check-enabled:
        description: Runs a reproducibility check on the build
        default: true
        type: boolean
      site-enabled:
        description: Flag indicating if Maven `site` goal should be run
        default: false
        type: boolean

    secrets:
      DV_ACCESS_TOKEN:
        description: Access token to Gradle Enterprise
        required: false

env:
  MAVEN_ARGS: ${{ inputs.maven-args }}

jobs:

  build:

    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
        os: [ macos-latest, ubuntu-latest, windows-latest ]

    steps:

      - name: Checkout repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683   # 4.2.2
        with:
          # When running on `pull_request` use the PR branch, not the target branch
          ref: ${{ github.event_name == 'pull_request_target' && github.head_ref || github.ref }}

      - name: Set up Java
        uses: actions/setup-java@8df1039502a15bceb9433410b1a100fbe190c53b   # 4.5.0
        with:
          distribution: zulu
          java-version: ${{ inputs.java-version }}
          cache: maven

      - name: Set up Develocity
        if: inputs.develocity-enabled
        shell: bash
        run: |
          if [ -f .mvn/develocity.xml ]; then
            DEVELOCITY_VERSION=$(./mvnw help:evaluate -q -DforceStdout -Dexpression=develocity-maven-plugin.version)
            USER_DATA_VERSION=$(./mvnw help:evaluate -q -DforceStdout -Dexpression=develocity-user-data-extension.version)
            cat >.mvn/extensions.xml <<EOF
            <extensions>
              <extension>
                <groupId>com.gradle</groupId>
                <artifactId>develocity-maven-extension</artifactId>
                <version>$DEVELOCITY_VERSION</version>
              </extension>
              <extension>
                <groupId>com.gradle</groupId>
                <artifactId>common-custom-user-data-maven-extension</artifactId>
                <version>$USER_DATA_VERSION</version>
              </extension>
            </extensions>
          EOF
          # Print file for debugging purposes
          cat .mvn/extensions.xml
          fi

      - name: Setup Develocity Build Scan capture
        if: inputs.develocity-enabled
        uses: gradle/develocity-actions/setup-maven@9f1bf05334de7eb619731d5466c35a153742311d   # 1.2
        with:
          develocity-access-key: ${{ secrets.DV_ACCESS_TOKEN }}

      # We could have used `verify`, but `clean install` is required while generating the build reproducibility report, which is performed in the next step.
      # For details, see: https://maven.apache.org/guides/mini/guide-reproducible-builds.html#how-to-test-my-maven-build-reproducibility
      - name: Build
        id: build
        shell: bash
        run: |
          ./mvnw \
            --show-version --batch-mode --errors --no-transfer-progress \
            -DtrimStackTrace=false \
            -DinstallAtEnd=true \
            clean install

      # We upload tests results.
      - name: Upload test reports
        if: always()
        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882   # 4.4.3
        with:
          name: surefire-${{matrix.os}}-${{github.run_number}}-${{github.run_attempt}}
          path: |
            **/target/surefire-reports
            **/target/logs

      - name: Clean up Develocity
        if: inputs.develocity-enabled
        shell: bash
        run: |
          rm -f .mvn/extensions.xml
          # Clean up changes introduced by gradle/develocity-actions/maven-setup
          echo "MAVEN_OPTS=" >> "$GITHUB_ENV"

      # Node.js cache is needed for Antora
      - name: Set up Node.js cache
        if: inputs.site-enabled
        id: nodejs-cache
        uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8   # 4.1.1
        with:
          # We should be calculating the cache key using `package-lock.json` instead!
          # See https://stackoverflow.com/a/48524475/1278899
          # For that, `package-lock.json` needs to be committed into the repository – right now it is `.gitignore`d.
          # Once it is there, we should ideally switch from `npm i` to `npm ci`.
          # For that, we need to configure `dependabot` to update hundreds of dependencies listed in `package-lock.json`.
          # That translates to a never ending rain of `dependabot` PRs.
          # I doubt if the wasted CPU cycles worth the gain.
          key: "${{ runner.os }}-nodejs-cache-${{ hashFiles('node', 'node_modules') }}"
          # `actions/cache` doesn't recommend caching `node_modules`.
          # Though none of its recipes fit our bill, since we install Node.js using `frontend-maven-plugin`.
          # See https://github.com/actions/cache/blob/main/examples.md#node---npm
          # We settle for this quick-n-dirty solution for the time being.
          path: |
            node
            node_modules

      - name: Build the website
        if: inputs.site-enabled
        shell: bash
        env:
          # Making Node.js cache hit visible for debugging purposes
          NODEJS_CACHE_HIT: ${{ steps.nodejs-cache.outputs.cache-hit }}
        run: |
          ./mvnw \
            --show-version --batch-mode --errors --no-transfer-progress \
            site

      # `clean verify artifact:compare` is required to generate the build reproducibility report.
      # For details, see: https://maven.apache.org/guides/mini/guide-reproducible-builds.html#how-to-test-my-maven-build-reproducibility
      - name: Verify build reproducibility
        if: inputs.reproducibility-check-enabled
        id: reproducibility
        shell: bash
        run: |
          ./mvnw \
            --show-version --batch-mode --errors --no-transfer-progress \
            -DskipTests=true \
            clean verify artifact:compare

      # Upload reproducibility results if the build fails.
      - name: Upload reproducibility results
        if: inputs.reproducibility-check-enabled && failure() && steps.reproducibility.conclusion == 'failure'
        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882   # 4.4.3
        with:
          name: reproducibility-${{matrix.os}}-${{github.run_number}}-${{github.run_attempt}}
          path: |
            **/target/bom.xml
            **/target/*.buildcompare
            **/target/*.jar
            **/target/*.zip
            **/target/reference/**