build.yml

name: Build

on:
  pull_request:
    paths-ignore:
    - 'README.md'
    - 'CODE_OF_CONDUCT.md'
    - 'CONTRIBUTING.md'
    - 'LICENSE'
    - 'SECURITY.md'
    - 'docs/**'
    - '.github/**'
    - '!.github/workflows/build.yml'
    - '!.github/workflows/testserver.yml'
  push:
    branches:
    - develop
    - main
    - release/*
    tags: '[0-9]+.[0-9]+.[0-9]+'
    paths-ignore:
    - 'README.md'
    - 'CODE_OF_CONDUCT.md'
    - 'CONTRIBUTING.md'
    - 'LICENSE'
    - 'SECURITY.md'
    - 'docs/**'
    - '.github/**'
    - '!.github/workflows/build.yml'
  release:
    types:
    - created

# Keep this filename in sync with the filename environment variable (PR_AUTO_BUILD_FILE_NAME) in the testserver-deployment.yml workflow

jobs:

  define-inputs:
    name: Define Inputs
    runs-on: ubuntu-latest
    outputs:
      release_upload: ${{ steps.set-upload-release.outputs.release_upload }}
      release_url: ${{ steps.set-upload-release.outputs.release_url }}
      release_path: ${{ steps.set-upload-release.outputs.release_path }}
      release_name: ${{ steps.set-upload-release.outputs.release_name }}
      release_type: ${{ steps.set-upload-release.outputs.release_type }}
      docker_build: ${{ steps.set-docker-build.outputs.docker_build }}
      docker_ref: ${{ steps.set-docker-ref.outputs.docker_ref }}
      docker_build_tag: ${{ steps.set-docker-tag.outputs.docker_build_tag }}
    steps:
      - name: Set Upload Release Artifact Outputs
        id: set-upload-release
        run: |
          # If event is release created, set the release_upload flag and the release artifact details
          if [[ "${{ github.event_name }}" == "release" && "${{ github.event.action }}" == "created" ]]; then
            echo "release_upload=true" >> $GITHUB_OUTPUT
            echo "release_url=${{ github.event.release.upload_url }}" >> $GITHUB_OUTPUT
            echo "release_path=build/libs/Artemis-${{ github.event.release.tag_name }}.war" >> $GITHUB_OUTPUT
            echo "release_name=Artemis.war" >> $GITHUB_OUTPUT
            echo "release_type=application/x-webarchive" >> $GITHUB_OUTPUT
          else
            echo "release_upload=false" >> $GITHUB_OUTPUT
          fi

      - name: Set Docker Build Flag
        id: set-docker-build
        run: |
          if [[ ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == 'ls1intum/Artemis' }} ]]; then
            echo "docker_build=true" >> $GITHUB_OUTPUT
          else
            echo "docker_build=false" >> $GITHUB_OUTPUT
          fi

      - name: Set Docker ref
        if: ${{ steps.set-docker-build.outputs.docker_build == 'true' }}
        id: set-docker-ref
        run: |
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # Checkout pull request HEAD commit instead of merge commit
            # this is done to include the correct branch and git information inside the build
            echo "docker_ref=${{ github.event.pull_request.head.ref }}" >> $GITHUB_OUTPUT
          elif [[ "${{ github.event_name }}" == "push" ]]; then
            echo "docker_ref=${{ github.ref_name }}" >> $GITHUB_OUTPUT
          fi

      - name: Compute Docker Tag
        if: ${{ steps.set-docker-build.outputs.docker_build == 'true' }}
        uses: actions/github-script@v7
        id: compute-tag
        with:
          result-encoding: string
          script: |
            if (context.eventName === "pull_request") {
              return "pr-" + context.issue.number;
            }
            if (context.eventName === "release") {
              return "latest";
            }
            if (context.eventName === "push") {
              if (context.ref.startsWith("refs/tags/")) {
                return context.ref.slice(10);
              }
              if (context.ref === "refs/heads/develop") {
                return "develop";
              }
            }
            return "FALSE";

      - name: Set Docker Tag
        id: set-docker-tag
        run: |
          if [[ ${{ steps.compute-tag.outputs.result  != 'FALSE' }} ]]; then
            echo "docker_build_tag=${{ steps.compute-tag.outputs.result }}" >> $GITHUB_OUTPUT
          fi


  call-build-workflow:
    name: Call Build Workflow
    needs: define-inputs
    uses: ./.github/workflows/reusable-build.yml
    with:
      build_war: true
      release_upload: ${{ needs.define-inputs.outputs.release_upload == 'true' }}
      release_url: ${{ needs.define-inputs.outputs.release_url }}
      release_path: ${{ needs.define-inputs.outputs.release_path }}
      release_name: ${{ needs.define-inputs.outputs.release_name }}
      release_type: ${{ needs.define-inputs.outputs.release_type }}
      docker: ${{ needs.define-inputs.outputs.docker_build == 'true' }}
      docker_ref: ${{ needs.define-inputs.outputs.docker_ref }}
      docker_build_tag: ${{ needs.define-inputs.outputs.docker_build_tag }}