assign-pull-request-reviewers-action

This is an action to assign reviewers of pull requests by the following rules:

• Assign a reviewer to pull requests which have same labels
• Determine a reviewer from the oldest pull request

Getting Started with Renovate

Problem to solve

Let us think a directory structure of monorepo, for example,

.
├── renovate.json5
└── components
    ├── foo
    │   └── package.json
    └── bar
        └── package.json

We would like to update a dependency per component separately, and assign pull requests of same dependency to same reviewer.

How to use

Set up Renovate with renovate.json5.

{
  "extends": [
    "config:base",
  ],
  "labels": [
    "renovate/{{depName}}",
  ],
  "reviewers": [
    "team:YOUR-TEAM",
  ],
  "packageRules": [
    {
      "description": "Update dependencies per component",
      "matchFileNames": ["components/**"],
      "additionalBranchPrefix": "{{packageFileDir}}-",
      "commitMessageSuffix": "({{packageFileDir}})",
    },
  ],
}

Renovate will create a pull request with a label of dependency name such as renovate/@types/node. It will create a pull request for each component such as components/foo/package.json.

Create a workflow.

name: assign-pull-request-reviewers

on:
  pull_request:
    # https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows#pull_request
    types:
      - review_requested

jobs:
  run:
    runs-on: ubuntu-latest
    steps:
      - uses: int128/assign-pull-request-reviewers-action@v1
        with:
          label-prefix: renovate/

What this action does

This action will assign a reviewer as follows:

• Assign a reviewer to pull requests which have same labels
• Determine a reviewer from the oldest pull request

If the following pull requests are open,

• Pull request #1 has a label renovate/@types/node and is reviewed by @foo
• Pull request #2 has a label renovate/@types/node and is reviewed by @bar
• Pull request #3 has a label renovate/@types/node and is reviewed by @baz

this action will request reviews as follows,

• Request a review of #2 to @foo
• Request a review of #3 to @foo

It will create an issue of the review dashboard. See an example.

Inputs

Outputs

No output.