name: Clear cache

on:
  workflow_dispatch:

permissions:
  actions: write

jobs:
  clear-cache:
    runs-on: ubuntu-latest
    steps:
      - name: Clear cache
        uses: actions/github-script@v6
        with:
          script: |
            const opts = {
              owner: context.repo.owner,
              repo: context.repo.repo,
            };

            const cache_list = await github.rest.actions.getActionsCacheList({
              per_page: 1,
              ...opts,
            });
            const per_page = 100;
            const pages = Math.ceil(cache_list.data.total_count / per_page);

            const total_count = cache_list.data.total_count;
            let deleted = 0;
            const _id = setInterval(() => {
              console.log(`${deleted}/${total_count}`);
            }, 500);

            let promises = [];
            for (let page = 1; page <= pages; page++) {
              const cache_page = await github.rest.actions.getActionsCacheList({
                per_page,
                page,
                ...opts,
              });
              for (const cache of cache_page.data.actions_caches) {
                promises.push(
                  github.rest.actions
                    .deleteActionsCacheById({
                      cache_id: cache.id,
                      ...opts,
                    })
                    .then(() => (deleted += 1))
                );
              }
              await Promise.all(promises);
              promises = [];

              // wait 60 seconds every 4 pages (secondary rate limit)
              if (page % 4 === 0) {
                await new Promise(f => setTimeout(f, 60_000));
              }
            }

            clearInterval(_id);