Automatically label new pull requests based on the paths of files being changed.

Create a .github/labeler.yml file with a list of labels and minimatch globs to match to apply the label.

The key is the name of the label in your repository that you want to add (eg: "merge conflict", "needs-updating") and the value is the path (glob) of the changed files (eg: src/**/*, tests/*.spec.js) or a match object.

For more control over matching, you can provide a match object instead of a simple path glob. The match object is defined as:

- any: ['list', 'of', 'globs']
  all: ['list', 'of', 'globs']

One or both fields can be provided for fine-grained matching. Unlike the top-level list, the list of path globs provided to any and all must ALL match against a path for the label to be applied.

The fields are defined as follows:

• any: match ALL globs against ANY changed path
• all: match ALL globs against ALL changed paths

A simple path glob is the equivalent to any: ['glob']. More specifically, the following two configurations are equivalent:

label1:
- example1/*

and

label1:
- any: ['example1/*']

From a boolean logic perspective, top-level match objects are OR-ed together and individual match rules within an object are AND-ed. Combined with ! negation, you can write complex matching rules.

# Add 'label1' to any changes within 'example' folder or any subfolders
label1:
- example/**/*

# Add 'label2' to any file changes within 'example2' folder
label2: example2/*

# Add 'repo' label to any root file changes
repo:
- '*'

# Add '@domain/core' label to any change within the 'core' package
@domain/core:
- package/core/*
- package/core/**/*

# Add 'test' label to any change to *.spec.js files within the source dir
test:
- src/**/*.spec.js

# Add 'source' label to any change to src files within the source dir EXCEPT for the docs sub-folder
source:
- any: ['src/**/*', '!src/docs/*']

# Add 'frontend` label to any change to *.js files as long as the `main.js` hasn't changed
frontend:
- any: ['src/**/*.js']
  all: ['!src/main.js']

Create a workflow (eg: .github/workflows/labeler.yml see Creating a Workflow file) to utilize the labeler action with content:

name: "Pull Request Labeler"
on:
- pull_request_target

jobs:
  triage:
    permissions:
      contents: read
      pull-requests: write
    runs-on: ubuntu-latest
    steps:
    - uses: actions/labeler@v4
      with:
        repo-token: "${{ secrets.GITHUB_TOKEN }}"

Note: This grants access to the GITHUB_TOKEN so the action can make calls to GitHub's rest API

Various inputs are defined in action.yml to let you configure the labeler:

Contributions are welcome! See the Contributor's Guide.