name: Release (Source)

on:
  workflow_call:
    outputs:
      version:
        value: ${{ jobs.source.outputs.version }}
      is_tag:
        value: ${{ jobs.source.outputs.is_tag }}
      trigger_type:
        value: ${{ jobs.source.outputs.trigger_type }}
      folder:
        value: ${{ jobs.source.outputs.folder }}

jobs:
  source:
    name: Source

    runs-on: ubuntu-20.04

    outputs:
      version: ${{ steps.metadata.outputs.version }}
      is_tag: ${{ steps.metadata.outputs.is_tag }}
      trigger_type: ${{ steps.metadata.outputs.trigger_type }}
      folder: ${{ steps.metadata.outputs.folder }}

    steps:
    - name: Checkout (Release)
      if: github.event_name == 'release'
      uses: actions/checkout@v3
      with:
        # We generate a changelog; for this we need the full git log.
        fetch-depth: 0

    - name: Checkout (Manual)
      if: github.event_name == 'workflow_dispatch'
      uses: actions/checkout@v3
      with:
        ref: ${{ github.event.inputs.ref }}
        # We generate a changelog; for this we need the full git log.
        fetch-depth: 0

    - name: Checkout (Trigger)
      if: github.event_name == 'repository_dispatch'
      uses: actions/checkout@v3
      with:
        ref: ${{ github.event.client_payload.ref }}
        # We generate a changelog; for this we need the full git log.
        fetch-depth: 0

    - name: Check valid branch name
      run: |
        if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
          REF="${{ github.event.inputs.ref }}"
        elif [ "${{ github.event_name }}" = "repository_dispatch" ]; then
          REF="${{ github.event.client_payload.ref }}"
        else
          REF="${{ github.ref }}"
        fi

        # Check if we are a tag.
        if [ -n "$(git name-rev --name-only --tags --no-undefined HEAD 2>/dev/null || false)" ]; then
          exit 0
        fi

        # Check if the checkout caused the branch to be named.
        if [ "$(git rev-parse --abbrev-ref HEAD)" != "HEAD" ]; then
          exit 0
        fi

        # Check if this was a pull request.
        if [ -n "$(echo ${REF} | grep '^refs/pull/[0-9]*')" ]; then
          PULL=$(echo ${REF} | cut -d/ -f3)
          git checkout -b pr${PULL}
        fi

        # Are we still in a detached state? Error out.
        if [ "$(git rev-parse --abbrev-ref HEAD)" == "HEAD" ]; then
          echo "The 'ref' given resulted in a checkout of a detached HEAD."
          echo "We cannot detect the version for these checkout accurate."
          echo ""
          echo "If you want to build a Pull Request, make sure you use 'refs/pull/NNN/head'."
          echo ""
          echo "Cancelling build, as without a version we cannot store the artifacts."
          exit 1
        fi

    - name: Generate metadata
      id: metadata
      run: |
        echo "::group::Prepare metadata files"
        cmake -DGENERATE_OTTDREV=1 -P cmake/scripts/FindVersion.cmake
        ./.github/changelog.sh > .changelog
        TZ='UTC' date +"%Y-%m-%d %H:%M UTC" > .release_date
        cat .ottdrev | cut -f 1 -d$'\t' > .version

        if [ $(cat .ottdrev | cut -f 5 -d$'\t') = '1' ]; then
          # Assume that all tags are always releases. Why else make a tag?
          IS_TAG="true"

          FOLDER="${{ env.FOLDER_RELEASES }}"
          TRIGGER_TYPE="new-tag"
        else
          IS_TAG="false"

          BRANCH=$(git symbolic-ref -q HEAD | sed 's@.*/@@')
          if [ -z "${BRANCH}" ]; then
            echo "Internal error: branch name is empty."
            echo "An earlier step should have prevented this from happening."
            echo "Cancelling build, as without a branch name we cannot store the artifacts"
            exit 1
          fi

          if [ "${BRANCH}" = "${{ env.NIGHTLIES_BRANCH }}" ]; then
            # The "master" branch is special, and we call a nightly.
            FOLDER="${{ env.FOLDER_NIGHTLIES }}/$(date +%Y)"
            TRIGGER_TYPE="new-master"
          else
            # All other branches, which can be builds of Pull Requests, are
            # put in their own folder.
            FOLDER="${{ env.FOLDER_BRANCHES }}/${BRANCH}"
            TRIGGER_TYPE="new-branch"
          fi
        fi

        mkdir -p build/bundles
        cp .changelog build/bundles/changelog.txt
        cp .release_date build/bundles/released.txt
        cp README.md build/bundles/README.md
        echo "::endgroup::"

        echo "Release Date: $(cat .release_date)"
        echo "Revision: $(cat .ottdrev)"
        echo "Version: $(cat .version)"
        echo "Is tag: ${IS_TAG}"
        echo "Folder on CDN: ${FOLDER}"
        echo "Workflow trigger: ${TRIGGER_TYPE}"

        echo "version=$(cat .version)" >> $GITHUB_OUTPUT
        echo "is_tag=${IS_TAG}" >> $GITHUB_OUTPUT
        echo "folder=${FOLDER}" >> $GITHUB_OUTPUT
        echo "trigger_type=${TRIGGER_TYPE}" >> $GITHUB_OUTPUT
      env:
        NIGHTLIES_BRANCH: master
        FOLDER_RELEASES: openttd-releases
        FOLDER_NIGHTLIES: openttd-nightlies
        FOLDER_BRANCHES: openttd-branches

    - name: Remove VCS information
      run: |
        rm -rf .git

    - name: Create bundles
      run: |
        FOLDER_NAME=openttd-${{ steps.metadata.outputs.version }}

        # Rename the folder to openttd-NNN
        mkdir ${FOLDER_NAME}
        find . -maxdepth 1 -not -name . -not -name build -not -name ${FOLDER_NAME} -exec mv {} ${FOLDER_NAME}/ \;

        echo "::group::Create tarball (xz) bundle"
        tar --xz -cvf build/bundles/${FOLDER_NAME}-source.tar.xz ${FOLDER_NAME}
        echo "::endgroup::"

        # This tarball is only to be used within this workflow.
        echo "::group::Create tarball (gz) bundle"
        tar --gzip -cvf source.tar.gz ${FOLDER_NAME}
        echo "::endgroup::"

        echo "::group::Create zip bundle"
        zip -9 -r build/bundles/${FOLDER_NAME}-source.zip ${FOLDER_NAME}
        echo "::endgroup::"

    - name: Store bundles
      uses: actions/upload-artifact@v3
      with:
        name: openttd-source
        path: build/bundles/*
        retention-days: 5

    - name: Store source (for other jobs)
      uses: actions/upload-artifact@v3
      with:
        name: internal-source
        path: source.tar.gz
        retention-days: 1