is-a-dev/.github/workflows/update-pr-branches.yml

name: Update PR Branches

on:
    workflow_dispatch:

jobs:
    update:
        name: Update
        runs-on: ubuntu-latest

        steps:
            - name: Update branches
              uses: actions/github-script@v8
              with:
                  github-token: ${{ secrets.BOT }}
                  script: |
                      const prs = await github.paginate(
                          github.rest.pulls.list,
                          {
                              owner: context.repo.owner,
                              repo: context.repo.repo,
                              state: "open",
                              per_page: 100
                          }
                      );

                      console.log(`Found ${prs.length} open PRs`);

                      for (const pr of prs) {
                          try {
                              await github.rest.pulls.updateBranch({
                                  owner: context.repo.owner,
                                  repo: context.repo.repo,
                                  pull_number: pr.number
                              });

                              console.log(`Updated #${pr.number} (${pr.head.ref})`);
                          } catch (error) {
                              console.log(`Could not update #${pr.number}: ${error.message}`);
                          }
                      }