This GitHub Action cheery picks merged PRs to selected branches based on labels given to PRs.

This action depends on the user to call the action uses: actions/checkout@v2 before using uses: aidasoft/pr-sweeper@v1. GitHub Actions currently do not support calling the action checkout from within pr-sweeper, this needs to be done explicitly by the user. Furthermore there are two aspects that need to considered when configuring the checkout action.

Firstly the number of commits to fetch. As the pr-sweeper needs a local checkout of the repository to find merge commits, it is necessary that you setup fetch-depth to an appropriate value that covers the sweeping time range. If in doubt you can always set fetch-depth: 0 and the checkout action will checkout the whole history e.g.:

- uses: actions/checkout@v2
  with:
    fetch-depth: 0

Secondly the pr-sweeper action offers two strategies what to do with merge commits, either you cherry-pick them to a new branch or you merge them to a new branch. Cherry-picking is currently not possible via the GitHub REST API (for discussion see this topic) therefore it is performed in the local checkout, hence you need to add to the checkout action the GitHub Personal Access Token (PAT) via token, to enable pushing back to the repository e.g.:

- uses: actions/checkout@v2
  with:
    fetch-depth: 0
    token: ${{ secrets.PAT }}

You can use this GitHub Action in a workflow in your own repository with uses: aidasoft/pr-sweeper@v1.

A minimal job example for GitHub-hosted runners of type ubuntu-latest:

jobs:
  sweep_PR:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0
        token: ${{ secrets.PAT }}
    - uses: aidasoft/pr-sweeper@v1
      with:
        github-pat: ${{ secrets.PAT }}

In this case the action will automatically resolve merge commits in the current branch in the last 24 hours and try to find the matching pull requests on GitHub. If the pull request has a label of the format alsoTargeting:_target_branch_ the action will create a new branch in the repository based on _target_branch_ and try to cheery-pick or merge the merge commit of the relevant PR to this newly created branch. If successful a PR with this newly created branch to _target_branch_ will be created and it will receive the label sweep:from _original_branch_ and the original PR will receive a label sweep:done. If at any step this operation something will fail, the original PR will receive in addition to sweep:done also sweep:failed. The label sweep:done only indicates that pr-sweeper has run once over this PR not that it was successful.

The following parameters are supported:

• branch: remote branch whose merge commits should be swept (default: auto - branch the action if executed on)
• github-pat: GitHub Personal Access Token
• project-name: GitHub project with namespace e.g. user/my-project (default: auto - inferred from the action environment)
• since: start of time interval for sweeping PR (default: 1 day ago)
• strategy: option if you want to cheery-pick the merge commit or merge it (options: merge or cherry-pick)
• until: end of time interval for sweeping PR (default: now)