name: Clean Source Cache

# Description:
# This workflow cleans up the source cache on the cross-instance cache volume
# to free up space. It runs daily at midnight and clears files older than 15 days.

on:
  schedule:
    - cron: "0 0 * * *"
  workflow_dispatch:

permissions: {}

jobs:
  setup:
    if: github.repository == 'electron/electron'
    runs-on: ubuntu-slim
    permissions:
      contents: read
    outputs:
      build-image-sha: ${{ steps.build-image-sha.outputs.build-image-sha }}
    steps:
    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
    - name: Set Build Image SHA
      id: build-image-sha
      uses: ./.github/actions/build-image-sha

  clean-src-cache:
    needs: setup
    runs-on: electron-arc-centralus-linux-amd64-32core
    permissions:
      contents: read
    env:
      DD_API_KEY: ${{ secrets.DD_API_KEY }}
    container:
      image: ghcr.io/electron/build:${{ needs.setup.outputs.build-image-sha }}
      options: --user root
      volumes:
        - /mnt/cross-instance-cache:/mnt/cross-instance-cache
        - /mnt/win-cache:/mnt/win-cache
    steps:
    - name: Get Disk Space Before Cleanup
      id: disk-before
      shell: bash
      run: |
        echo "Disk space before cleanup:"
        df -h /mnt/cross-instance-cache
        df -h /mnt/win-cache
        CROSS_FREE_BEFORE=$(df -k /mnt/cross-instance-cache | tail -1 | awk '{print $4}')
        CROSS_TOTAL=$(df -k /mnt/cross-instance-cache | tail -1 | awk '{print $2}')
        WIN_FREE_BEFORE=$(df -k /mnt/win-cache | tail -1 | awk '{print $4}')
        WIN_TOTAL=$(df -k /mnt/win-cache | tail -1 | awk '{print $2}')
        echo "cross_free_kb=$CROSS_FREE_BEFORE" >> $GITHUB_OUTPUT
        echo "cross_total_kb=$CROSS_TOTAL" >> $GITHUB_OUTPUT
        echo "win_free_kb=$WIN_FREE_BEFORE" >> $GITHUB_OUTPUT
        echo "win_total_kb=$WIN_TOTAL" >> $GITHUB_OUTPUT

    - name: Cleanup Source Cache
      shell: bash
      run: |
        find /mnt/cross-instance-cache -type f -mtime +15 -delete
        find /mnt/win-cache -type f -mtime +15 -delete

    - name: Get Disk Space After Cleanup
      id: disk-after
      shell: bash
      run: |
        echo "Disk space after cleanup:"
        df -h /mnt/cross-instance-cache
        df -h /mnt/win-cache
        CROSS_FREE_AFTER=$(df -k /mnt/cross-instance-cache | tail -1 | awk '{print $4}')
        WIN_FREE_AFTER=$(df -k /mnt/win-cache | tail -1 | awk '{print $4}')
        echo "cross_free_kb=$CROSS_FREE_AFTER" >> $GITHUB_OUTPUT
        echo "win_free_kb=$WIN_FREE_AFTER" >> $GITHUB_OUTPUT

    - name: Log Disk Space to Datadog
      if: ${{ env.DD_API_KEY != '' }}
      shell: bash
      env:
        CROSS_FREE_BEFORE: ${{ steps.disk-before.outputs.cross_free_kb }}
        CROSS_FREE_AFTER: ${{ steps.disk-after.outputs.cross_free_kb }}
        CROSS_TOTAL: ${{ steps.disk-before.outputs.cross_total_kb }}
        WIN_FREE_BEFORE: ${{ steps.disk-before.outputs.win_free_kb }}
        WIN_FREE_AFTER: ${{ steps.disk-after.outputs.win_free_kb }}
        WIN_TOTAL: ${{ steps.disk-before.outputs.win_total_kb }}
      run: |
        TIMESTAMP=$(date +%s)

        CROSS_FREE_BEFORE_GB=$(awk "BEGIN {printf \"%.2f\", $CROSS_FREE_BEFORE / 1024 / 1024}")
        CROSS_FREE_AFTER_GB=$(awk "BEGIN {printf \"%.2f\", $CROSS_FREE_AFTER / 1024 / 1024}")
        CROSS_FREED_GB=$(awk "BEGIN {printf \"%.2f\", ($CROSS_FREE_AFTER - $CROSS_FREE_BEFORE) / 1024 / 1024}")
        CROSS_TOTAL_GB=$(awk "BEGIN {printf \"%.2f\", $CROSS_TOTAL / 1024 / 1024}")

        WIN_FREE_BEFORE_GB=$(awk "BEGIN {printf \"%.2f\", $WIN_FREE_BEFORE / 1024 / 1024}")
        WIN_FREE_AFTER_GB=$(awk "BEGIN {printf \"%.2f\", $WIN_FREE_AFTER / 1024 / 1024}")
        WIN_FREED_GB=$(awk "BEGIN {printf \"%.2f\", ($WIN_FREE_AFTER - $WIN_FREE_BEFORE) / 1024 / 1024}")
        WIN_TOTAL_GB=$(awk "BEGIN {printf \"%.2f\", $WIN_TOTAL / 1024 / 1024}")

        echo "cross-instance-cache: free before=${CROSS_FREE_BEFORE_GB}GB, after=${CROSS_FREE_AFTER_GB}GB, freed=${CROSS_FREED_GB}GB, total=${CROSS_TOTAL_GB}GB"
        echo "win-cache: free before=${WIN_FREE_BEFORE_GB}GB, after=${WIN_FREE_AFTER_GB}GB, freed=${WIN_FREED_GB}GB, total=${WIN_TOTAL_GB}GB"

        curl -s -X POST "https://api.datadoghq.com/api/v2/series" \
          -H "Content-Type: application/json" \
          -H "DD-API-KEY: ${DD_API_KEY}" \
          -d @- << EOF
        {
          "series": [
            {
              "metric": "electron.src_cache.disk.free_space_before_cleanup_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${CROSS_FREE_BEFORE_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:cross-instance-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.free_space_after_cleanup_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${CROSS_FREE_AFTER_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:cross-instance-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.space_freed_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${CROSS_FREED_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:cross-instance-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.total_space_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${CROSS_TOTAL_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:cross-instance-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.free_space_before_cleanup_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${WIN_FREE_BEFORE_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:win-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.free_space_after_cleanup_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${WIN_FREE_AFTER_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:win-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.space_freed_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${WIN_FREED_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:win-cache", "platform:linux"]
            },
            {
              "metric": "electron.src_cache.disk.total_space_gb",
              "points": [{"timestamp": ${TIMESTAMP}, "value": ${WIN_TOTAL_GB}}],
              "type": 3,
              "unit": "gigabyte",
              "tags": ["volume:win-cache", "platform:linux"]
            }
          ]
        }
        EOF

        echo "Disk space metrics logged to Datadog"