Hephaestus/.github/actions/setup-caches/action.yml at 75135cc7e19cb62b57722b38c374d719dba4fa16 · hephaestus-build/Hephaestus · GitHub

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name: "Setup CI caches"
description: "Set up the JDK and restore the Maven dependency cache; reactor jobs also restore the generated-client build cache."
inputs:
  cache-type:
    description: "application-server-reactor for jobs that run the Maven reactor; application-server-tests for jobs that run goals against the packaged reactor"
    required: true
  os:
    description: "Operating system for cache key"
    required: false
    default: "ubuntu-latest"

runs:
  using: "composite"
  steps:
    - name: Validate cache type
      shell: bash
      env:
        CACHE_TYPE: ${{ inputs.cache-type }}
      run: |
        case "$CACHE_TYPE" in
          application-server-reactor|application-server-tests) ;;
          *) echo "::error::Unknown cache type '$CACHE_TYPE'."; exit 1 ;;
        esac

    - name: Compute cache identities
      id: identity
      shell: bash
      env:
        DEPENDENCY_HASH: ${{ hashFiles('server/**/pom.xml', 'server/.mvn/extensions.xml', 'server/.mvn/wrapper/maven-wrapper.properties') }}
        GENERATED_CLIENTS_HASH: ${{ hashFiles('server/pom.xml', 'server/generated-clients/pom.xml', 'server/.mvn/**', 'server/generated-clients/src/**') }}
        DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
      run: |
        if [[ -z "$DEPENDENCY_HASH" || -z "$GENERATED_CLIENTS_HASH" ]]; then
          echo "::error::Cannot compute the cache identities from the checked-out repository."
          exit 1
        fi
        echo "dependencies=$DEPENDENCY_HASH" >> "$GITHUB_OUTPUT"
        echo "generated-clients=$GENERATED_CLIENTS_HASH" >> "$GITHUB_OUTPUT"
        # Only the default branch's pushes and schedules write caches; every other run reads them.
        if [[ "$GITHUB_REF" == "refs/heads/$DEFAULT_BRANCH" && "$GITHUB_EVENT_NAME" =~ ^(push|schedule|workflow_dispatch)$ ]]; then
          echo "save=true" >> "$GITHUB_OUTPUT"
        else
          echo "save=false" >> "$GITHUB_OUTPUT"
        fi

    - name: Set up JDK 21
      id: java
      uses: actions/setup-java@dd06d9cba3e5552c54d9f8ea23572deb30010f7c # v6.0.0
      with:
        distribution: "temurin"
        java-version: "21"
        cache-jdk: false

    # A prefix fallback keeps a pom change from downloading the whole dependency tree again;
    # setup-java's own Maven cache restores only an exact pom hash.
    - name: Restore Maven dependencies
      if: steps.identity.outputs.save != 'true'
      uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
      with:
        path: ~/.m2/repository
        key: ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-maven-${{ steps.identity.outputs.dependencies }}
        restore-keys: |
          ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-maven-

    # Reactor jobs resolve the complete tree, so only they save; a consumer job would also cache
    # the reactor artifacts it installed.
    - name: Cache Maven dependencies
      if: steps.identity.outputs.save == 'true' && inputs.cache-type == 'application-server-reactor'
      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
      with:
        path: ~/.m2/repository
        key: ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-maven-${{ steps.identity.outputs.dependencies }}
        restore-keys: |
          ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-maven-

    - name: Restore generated clients
      if: steps.identity.outputs.save != 'true' && inputs.cache-type == 'application-server-reactor'
      uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
      with:
        path: ~/.m2/build-cache
        key: ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-generated-clients-${{ steps.identity.outputs.generated-clients }}

    - name: Cache generated clients
      if: steps.identity.outputs.save == 'true' && inputs.cache-type == 'application-server-reactor'
      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
      with:
        path: ~/.m2/build-cache
        key: ${{ inputs.os }}-${{ steps.java.outputs.distribution }}-${{ steps.java.outputs.version }}-generated-clients-${{ steps.identity.outputs.generated-clients }}