Conventional Commits Check

Validate commit messages against the Conventional Commits specification.

Requirements

• By default, this action runs actions/checkout with fetch-depth: 0 so the commit history is available.
• Set checkout: false if you already checked out the repository with the correct history depth.

Inputs

Basic Configuration

• checkout: Whether to run actions/checkout before validation (default: true).
• base-sha: Base commit SHA to compare against (optional; defaults to merge-base with origin/$GITHUB_BASE_REF, origin/main, or origin/master).
• head-sha: Head commit SHA to validate (optional; defaults to HEAD).
• pr-comment: Comment on PR with validation results - none, error, success, or both (default: error).

Advanced Configuration

• types: Allowed types (pipe-separated, default: feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert).

  • Example: feat|fix|hotfix to only allow these types
  • Supports regex patterns: feat|fix|JIRA-\d+

• scopes: Allowed scopes (regex patterns, pipe-separated, default: empty = all allowed).

  • Example: api|ui|core to restrict to these scopes
  • Example: [a-z]+ to only allow lowercase scopes
  • Example: JIRA-\d+|PROJ-\d+ to require ticket numbers

• require-scope: Require a scope in each commit message (default: false).

• ignore-commits: Patterns to ignore (regex, newline-separated).

  • Example: ^Merge branch|^Revert to skip merge commits
  • Useful for automated commits

• validate-pr-title: Also validate the PR title against conventional commits format (default: false).

Outputs

• status: Validation status - success or failure
• invalid-count: Number of invalid commits
• valid-count: Number of valid commits
• error-message: Detailed error message if validation failed

Examples

Basic Usage (pull_request)

name: Conventional Commits

on:
  pull_request:

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Validate commits
        uses: helpers4/action/conventional-commits@v1
        with:
          base-sha: ${{ github.event.pull_request.base.sha }}
          head-sha: ${{ github.event.pull_request.head.sha }}

With Custom Types

- name: Validate commits
  uses: helpers4/action/conventional-commits@v1
  with:
    types: 'feat|fix|hotfix|chore'

With Scope Validation

- name: Validate commits  
  uses: helpers4/action/conventional-commits@v1
  with:
    scopes: 'api|ui|core|docs'
    require-scope: 'true'

With Ticket Numbers in Scopes

- name: Validate commits
  uses: helpers4/action/conventional-commits@v1
  with:
    scopes: 'JIRA-\d+|PROJ-\d+'
    require-scope: 'true'
    # Valid: feat(JIRA-123): add feature
    # Invalid: feat: add feature (no scope)

Ignore Automated Commits

- name: Validate commits
  uses: helpers4/action/conventional-commits@v1
  with:
    ignore-commits: |
      ^Merge branch
      ^Revert
      ^chore\(deps\):

Validate PR Title + Commits

- name: Validate commits and PR title
  uses: helpers4/action/conventional-commits@v1
  with:
    validate-pr-title: 'true'
    pr-comment: 'both'

Using Outputs

- name: Validate commits
  id: validate
  uses: helpers4/action/conventional-commits@v1
  
- name: Post custom comment
  if: steps.validate.outputs.status == 'failure'
  run: |
    echo "Found ${{ steps.validate.outputs.invalid-count }} invalid commits"
    echo "Error: ${{ steps.validate.outputs.error-message }}"

Advanced Example with All Options

name: Conventional Commits

on:
  push:

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Validate commits
        uses: helpers4/action/conventional-commits@v1
        with:
          base-sha: ${{ github.event.before }}
          head-sha: ${{ github.sha }}

Configuration Details

Types

The default types follow the Conventional Commits specification:

• feat: A new feature
• fix: A bug fix
• docs: Documentation only changes
• style: Changes that don’t affect code meaning (formatting, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding or correcting tests
• build: Changes to build system or dependencies
• ci: Changes to CI configuration
• chore: Other changes that don’t modify src or test files
• revert: Reverts a previous commit

You can customize this list to match your workflow.

Scopes

Scopes are optional identifiers that provide additional context. Common patterns:

• Component names: (api), (ui), (auth)
• Ticket numbers: (JIRA-123), (GH-456)
• Feature areas: (dashboard), (settings)

Use the scopes input to restrict which scopes are allowed (regex patterns). Use require-scope: true to make scopes mandatory.

PR Comments

The action can automatically comment on PRs with validation results:

• none or false: No comments
• error: Comment only on failures (default)
• success: Comment only on success
• both or true: Always comment