Marvin

A GitHub bot which can automatically add labels, approve or merge PRs.

Why?

Sometimes you want to merge code to specific branch, but don't want extra approvals since the code in the source branch was already reviewed in previous code reviews. If you have protected branches that require at least 1 approval this will come in handy.

Example usage

name: automerge
on:
  pull_request:
    branches:
      - master
  status: {}

jobs:
  merge:
    if: (github.base_ref == 'staging' && (startsWith(github.head_ref, 'fix/') || github.head_ref == 'dev')) || (github.event.context == 'continuous-integration/jenkins/branch' && github.event.state == 'success')
    runs-on: ubuntu-latest
    steps:
      - uses: 3DHubs/marvin@v0.1.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          approve: true
          merge: true
          mergeMethod: merge
          sourceBranches: dev
          label: ready2merge

Note: these parameters are optional and can be omitted. The values below are actually the defaults:

Option	Default value	Explanation
token	None	GitHub token which is usually automatically passed by GitHub
approve	true	Whether to approve the PR automatically
label	None	What label to add to the PR. By default it doesn't add anything
merge	true	Whether to merge the PR automatically
mergeMethod	merge	Merge method: squash, merge or rebase
onlyProtectedBranches	true	Search only PRs from protected branches
sourceBranches	empty	A list of specific source branches separated by commas. If defined only PRs from that branch will be eligible

Debugging

To see debugging messages you can set this repository level secret. More info here

ACTIONS_STEP_DEBUG=true

Also I found these steps useful:

      - name: debug echo
        run: |
          echo ${{ github.event.branches.name }}
          echo ${{ github.event.context }}
          echo ${{ github.event.description }}
          echo ${{ github.event.state }}
          echo ${{ github.event.context }}
      - name: Debug Action
        uses: hmarr/debug-action@v1.0.0

Development

After you change anything in src/index.js, make sure to build it, tag it and push it to GitHub:

npm run-script build
git commit -m "your message" dist/index.ts src/index.ts
git tag -a -m "0.1.1" v0.1.1
git push --follow-tags