affected-pr-comment

Automatically comment on pull requests showing which packages are affected by the changes and why.

Usage

name: PR Comment

on:
  pull_request:
    branches: [main]

permissions:
  pull-requests: write

jobs:
  comment:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: Rani367/affected-pr-comment@v1
        with:
          base: origin/main

What it looks like

The action posts a comment like this on your PR:

Affected Packages (3 of 8)

Package	Reason
core	directly changed: src/lib.rs
api	depends on: core
cli	depends on: api -> core

2 file(s) changed

• crates/core/src/lib.rs
• crates/core/src/types.rs

The comment is automatically updated on each push to the PR (no duplicate comments).

Inputs

Input	Description	Default
base	Base branch to compare against	origin/main
version	affected CLI version to install	latest
token	GitHub token for posting comments	${{ github.token }}
header	Unique identifier for comment dedup	affected-packages

Permissions

This action requires pull-requests: write permission to post comments.

For fork PRs, use the pull_request_target event instead of pull_request:

on:
  pull_request_target:
    branches: [main]

Note: pull_request_target runs in the context of the base branch, which has write access but uses the base branch code. Make sure to check out the PR head if needed.