cleanup-caches.yml

# Mostly for DeterminateSystems/magic-nix-cache-action
name: 👋 caches
on:
  push:
    branches: [main]
  pull_request:
    types:
      - closed
  schedule:
    # Every 12:42 JST
    # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule
    - cron: '42 3 * * *'
  workflow_dispatch:

defaults:
  run:
    shell: 'bash -euxo pipefail {0}'

# Take care all jobs do not scope same reference. If then, the steps should be in one job and runs sequential
jobs:
  prs:
    # Basically skip to avoid rate limit with the N+1
    if: github.event_name == 'workflow_dispatch'
    concurrency:
      group: '${{ github.workflow }}-prs' # Dont' use  ${{ github.job }} here
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      # Intentionally cover all merged PRs to keep simple logics. See https://github.com/kachick/times_kachick/issues/311
      - name: Cleanup caches in merged PRs
        run: |
          gh pr list --state merged --json number --jq '.[].number' --limit 2000 | \
            xargs --no-run-if-empty -I '{}' gh cache list --sort size_in_bytes --order desc --json id --jq '.[].id' --limit 100 --ref 'refs/pull/{}/merge' | \
            xargs --no-run-if-empty --max-lines=1 gh cache delete
        env:
          GH_TOKEN: ${{ github.token }}
  pr:
    if: github.event_name == 'pull_request'
    concurrency:
      group: '${{ github.workflow }}-pr-${{ github.event.pull_request.number }}' # Dont' use  ${{ github.job }} here
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      # Intentionally cover all merged PRs to keep simple logics. See https://github.com/kachick/times_kachick/issues/311
      - name: Cleanup caches in the PR
        run: |
          gh cache list --sort size_in_bytes --order desc --json id --jq '.[].id' --limit 100 --ref 'refs/pull/${{ github.event.pull_request.number }}/merge' | \
            xargs --no-run-if-empty --max-lines=1 gh cache delete
        env:
          GH_TOKEN: ${{ github.token }}
  main:
    concurrency:
      group: '${{ github.workflow }}-main' # Dont' use  ${{ github.job }} here
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v4
      # 10Gib limit is too small even if focused on default branch
      - name: Cleanup caches in main branch
        run: |
          # We can lexicographical sort RFC3399 formatted timestamp
          threshold="$(date --rfc-3339='date' --date='-4 days')"
          gh cache list --limit 2000 --ref 'refs/heads/main' --sort last_accessed_at --order asc --json 'id,lastAccessedAt,sizeInBytes' --jq ".[] | select(.lastAccessedAt < \"$threshold\") | .id" | \
            xargs --no-run-if-empty --max-lines=1 gh cache delete
        env:
          GH_TOKEN: ${{ github.token }}