name: Test
on:
  workflow_dispatch:
  schedule:
    # weekly, randomly chosen time
    - cron: "17 18 * * 0"
  push:
    branches-ignore:
      - 'test-report'

concurrency:
  group: ${{ github.workflow }}
  cancel-in-progress: true

env:
  REPORT_DIR: /tmp/build-report

jobs:
  test-docker-tmp:
    name: Test removing root-owned folder
    runs-on: ubuntu-latest
    steps:
      - name: Check out Maximize Build Space action
        uses: actions/checkout@v4
        with:
          path: ./.github/actions/maximize-test

      - name: Maximize build space
        uses: ./.github/actions/maximize-test
        with:
          build-mount-path: /var/lib/docker/tmp

  test-mount-parent-of-workspace:
    name: Test mounting the parent of GITHUB_WORKSPACE
    runs-on: ubuntu-latest
    steps:
      - name: Check out Maximize Build Space action
        uses: actions/checkout@v4
        with:
          path: ./.github/actions/maximize-test

      - name: Calculate parent of workspace
        id: workspace-parent
        run: echo "parent=$(dirname "${GITHUB_WORKSPACE}")" >> "$GITHUB_OUTPUT"

      - name: Maximize build space
        uses: ./.github/actions/maximize-test
        with:
          build-mount-path: ${{ steps.workspace-parent.outputs.parent }}

      - name: Create file in build folder as runner user (test ownership)
        run: |
          mkdir -p ${{ steps.workspace-parent.outputs.parent }}/new
          touch ${{ steps.workspace-parent.outputs.parent }}/new/file.txt
          touch ${GITHUB_WORKSPACE}/file.txt
          ls -alR ${{ steps.workspace-parent.outputs.parent }}

  determine-free-space:
    name: Determine free space with different settings
    runs-on: ${{ matrix.os }}

    strategy:
      fail-fast: false
      matrix:
        os:
          - ubuntu-20.04
          - ubuntu-22.04
        remove-android:
          - 'true'
          - 'false'
        remove-dotnet:
          - 'true'
          - 'false'
        remove-haskell:
          - 'true'
          - 'false'
        remove-codeql:
          - 'true'
          - 'false'
        remove-docker-images:
          - 'true'
          - 'false'

    steps:
      - name: Record start time
        run: |
          echo "START_TIME=$(date +%s)" >> $GITHUB_ENV

      - name: Determine free space before
        run: |
          echo "FREE_GIG_BEFORE=$(df --output=avail --sync -BG "${{ github.workspace }}" | tail -1 | sed 's/[^0-9]*//g')" >> $GITHUB_ENV

      - name: Check out Maximize Build Space action
        uses: actions/checkout@v4
        with:
          path: ./.github/actions/maximize-test

      - name: Maximize build space
        uses: ./.github/actions/maximize-test
        with:
          remove-android:       ${{ matrix.remove-android }}
          remove-dotnet:        ${{ matrix.remove-dotnet }}
          remove-haskell:       ${{ matrix.remove-haskell }}
          remove-codeql:        ${{ matrix.remove-codeql }}
          remove-docker-images: ${{ matrix.remove-docker-images }}

      - name: Record end time
        run: |
          echo "END_TIME=$(date +%s)" >> $GITHUB_ENV

      - name: Determine free space after
        run: |
          echo "FREE_GIG_AFTER=$(df --output=avail --sync -BG "${{ github.workspace }}" | tail -1 | sed 's/[^0-9]*//g')" >> $GITHUB_ENV

      - name: Calculate freed space and elapsed time
        run: |
          REPORT_FILENAME_BASE="${REPORT_DIR}/${{ matrix.os }}_${{ matrix.remove-android }}_${{ matrix.remove-dotnet }}_${{ matrix.remove-haskell }}_${{ matrix.remove-codeql }}_${{ matrix.remove-docker-images }}"
          FREED_GIG=$(expr ${FREE_GIG_AFTER} - ${FREE_GIG_BEFORE})
          ELAPSED_TIME=$(expr ${END_TIME} - ${START_TIME})

          echo "Free space before: ${FREE_GIG_BEFORE}G"
          echo "Free space after : ${FREE_GIG_AFTER}G"
          echo "Space freed      : ${FREED_GIG}G"
          echo "Time elapsed    : ${ELAPSED_TIME} seconds"

          mkdir -p "${REPORT_DIR}"

          REMOVE_ANDROID="${{ matrix.remove-android }}"
          REMOVE_DOTNET="${{ matrix.remove-dotnet }}"
          REMOVE_HASKELL="${{ matrix.remove-haskell }}"
          REMOVE_CODEQL="${{ matrix.remove-codeql }}"
          REMOVE_DOCKER_IMAGES="${{ matrix.remove-docker-images }}"

          cat <<EOF > "${REPORT_FILENAME_BASE}.json"
            {
              "os":                   "${{ matrix.os }}",
              "remove_android":       "${REMOVE_ANDROID//false/}",
              "remove_dotnet":        "${REMOVE_DOTNET//false/}",
              "remove_haskell":       "${REMOVE_HASKELL//false/}",
              "remove_codeql":        "${REMOVE_CODEQL//false/}",
              "remove_docker_images": "${REMOVE_DOCKER_IMAGES//false/}",
              "space_free_before":    "${FREE_GIG_BEFORE}",
              "space_free_after":     "${FREE_GIG_AFTER}",
              "space_freed":          "${FREED_GIG}",
              "elapsed_time":         "${ELAPSED_TIME}"
            }
          EOF
          jq -r '[.os, .remove_android, .remove_dotnet, .remove_haskell, .remove_codeql, .remove_docker_images, .space_freed, .space_free_after, .elapsed_time] | join(" | ")' < "${REPORT_FILENAME_BASE}.json" >> "${REPORT_FILENAME_BASE}.txt"

      - name: Upload disk space report
        uses: actions/upload-artifact@v3
        with:
          name: disk-space-report-single
          path: ${{ env.REPORT_DIR }}

  collect-reports:
    name: Collect reports
    runs-on: ubuntu-latest
    needs: determine-free-space
    env:
      REPORT_FILE: space-free-report.md

    steps:
      - name: Download single reports
        uses: actions/download-artifact@v3
        with:
          name: disk-space-report-single
          path: ${{ env.REPORT_DIR }}

      - name: Join Markdown report
        run: |
          echo 'OS | Android SDKs removed | .NET SDKs removed | Haskell removed | CodeQL Removed | Cached Docker Images Removed | GB freed | GB free | Elapsed Time (seconds) |' > "${REPORT_DIR}/${REPORT_FILE}"
          echo '---|:--------------------:|:-----------------:|:---------------:|:--------------:|:----------------------------:|:--------:|:-------:|:----------------------:|' >> "${REPORT_DIR}/${REPORT_FILE}"
          cat ${REPORT_DIR}/*.txt >> "${REPORT_DIR}/${REPORT_FILE}"

      - name: Upload collected report
        uses: actions/upload-artifact@v3
        with:
          name: disk-space-report-markdown
          path: ${{ env.REPORT_DIR }}/${{ env.REPORT_FILE }}

      - name: Checkout report branch
        uses: actions/checkout@v4
        with:
          ref: test-report

      - name: Overwrite old report
        run: |
          cp README.md.template README.md
          cat ${{ env.REPORT_DIR }}/${{ env.REPORT_FILE }} >> README.md

          cat "${REPORT_DIR}/${REPORT_FILE}"

          git config user.name github-actions
          git config user.email github-actions@github.com
          git add README.md
          git commit -m "Generated new report" && git push || echo "Report unchanged, not updating."