Creates a comment inside Pull Request with the human-readable summary of the changes to the yarn.lock file. Works in public and private repositories, offers a degree of customization.

Example below shows the minimal workflow setup, required action input (token) and all the optional inputs (set to theirs default values). If you are happy with the output generated by the action, it's safe to remove all optional inputs.

name: Yarn Lock Changes
on: [pull_request]

jobs:
  yarn_lock_changes:
    runs-on: ubuntu-latest
    # Permission overwrite is required for Dependabot PRs, see "Common issues" section below.
    permissions:
      pull-requests: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Yarn Lock Changes
        # Please use `main` as version before the stable release will be published as `v1`.
        uses: Simek/yarn-lock-changes@main
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          # Optional inputs, can be deleted safely if you are happy with default values.
          collapsibleThreshold: 25
          failOnDowngrade: false
          path: yarn.lock
          updateComment: true
          groupByType: false

[!note] For Node <18 support, you can change the action version tag in your workflow to v0.11, instead of using main:

- name: Yarn Lock Changes
  uses: Simek/yarn-lock-changes@v0.11

Due to the security reasons from March 1st, 2021 workflow runs that are triggered by Dependabot have permissions reduced by default:

• GitHub Actions: Workflows triggered by Dependabot PRs will run with read-only permissions

To ensure that sufficient permissions for this action are always granted, you will need to add permissions entry to the job which runs yarn-lock-changes:

jobs:
  ...:
    runs-on: ...
    #####
    permissions:
      pull-requests: write
    #####
    steps:
      ...

After one of the GitHub Actions security breaches GitHub decided to trim down the default permission set for actions running in private repositories.

If you are trying to run action with default setup in the private repository, you will see the following error during checkout step:

remote: Repository not found.
Error: fatal: repository 'https://github.com/<your_user>/<your_repo>/' not found
Error: The process '/usr/bin/git' failed with exit code 128

This means that you will need to add the following permissions entry to the job which runs checkout:

jobs:
  ...:
    runs-on: ...
    #####
    permissions:
      contents: read
    #####
    steps:
      ...

If you would like to learn a little bit more about this problem, you can visit this issue in the GitHub Checkout Action repository:

• https://github.com/actions/checkout/issues/254

To run action in the debug mode you need to add the ACTIONS_STEP_DEBUG repository secret and set it to true, as stated in the GitHub documentation.

Then additional information which might be useful for the users when debugging the issues will be available in the action output, prefixed by ##[debug].