Action Lint Commits

This is a GitHub Action to lint commits on a pull request based one regex.

It's designed to work with other GitHub Actions so that you can flexibly build your workflow like posting warning comments in GitHub issues, Slack, and anything.

Inputs

NAME	DESCRIPTION	TYPE	REQUIRED	DEFAULT
github_token	A GitHub token.	string	true	N/A
regex	The regex for commit messages.	string	true	N/A
format	The output format of outputs.{matched_commits,unmatched_commits} in ['markdown', 'json', 'yaml'].	string	true	N/A

Outputs

NAME	DESCRIPTION	TYPE
matched_commits	The commits which match inputs.regex.	string
unmatched_commits	The commits which don't match inputs.regex.	string

You would pass the outputs to the inputs of other GitHub Actions to use the result of lint.

Output Examples

format='markdown'

- [`sha1xxxx`](https://github.com/owner/repo/commit/sha1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx): message 1
- [`sha2xxxx`](https://github.com/owner/repo/commit/sha2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx): message 2
- [`sha3xxxx`](https://github.com/owner/repo/commit/sha3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx): message 3

format='json'

[
  {
    "message": "message 1",
    "sha": "sha1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "url": "https://github.com/owner/repo/commit/sha1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  },
  {
    "message": "message 2",
    "sha": "sha2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "url": "https://github.com/owner/repo/commit/sha2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  },
  {
    "message": "message 3",
    "sha": "sha3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    "url": "https://github.com/owner/repo/commit/sha3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  }
]

format='yaml'

- message: "message 1"
  sha: "sha1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  url: "https://github.com/owner/repo/commit/sha1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
- message: "message 2"
  sha: "sha2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  url: "https://github.com/owner/repo/commit/sha2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
- message: "message 3"
  sha: "sha3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  url: "https://github.com/owner/repo/commit/sha3xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

Example

name: Lint Commits

on:
  pull_request_target:
    types: ["opened", "reopened", "synchronize"]

jobs:
  lint_commits:
    runs-on: ubuntu-latest
    steps:
      - name: Lint commits
        uses: actions-ecosystem/action-lint-commits@v1
        id: lint-commits
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          regex: '^\w+\(.+\): .+' # e.g.) "feat(api): Add /users/get"
          format: markdown

      - name: Post warning comment
        uses: actions-ecosystem/action-create-comment@v1
        if: ${{ steps.lint-commits.outputs.unmatched_commits != '' }}
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          body: |
            The following commits needs their message changes:

            ${{ steps.lint-commits.outputs.unmatched_commits }}

            The format `<type>(<scope>): <subject>` (`^\w+\(.+\): .+`) is acceptable. e.g., `feat(api): Add /users/get`

      - name: Fail when commits don't pass lint
        if: ${{ steps.lint-commits.outputs.unmatched_commits != '' }}
        run: exit 1

License

Copyright 2020 The Actions Ecosystem Authors.

Action Lint Commits is released under the Apache License 2.0.