conventional-pre-commit

A pre-commit hook to check commit messages for Conventional Commits formatting.

Works with Python >= 3.8.

Usage

Make sure pre-commit is installed.

Create a blank configuration file at the root of your repo, if needed:

touch .pre-commit-config.yaml

Add a new repo entry to your configuration file:

repos:
  # - repo: ...

  - repo: https://github.com/compilerla/conventional-pre-commit
    rev: <git sha or tag>
    hooks:
      - id: conventional-pre-commit
        stages: [commit-msg]
        args: []

Install the pre-commit script:

pre-commit install --hook-type commit-msg

Make a (normal) commit ❌:

$ git commit -m "add a new feature"

[INFO] Initializing environment for ....
Conventional Commit......................................................Failed
- hook id: conventional-pre-commit
- duration: 0.07s
- exit code: 1

[Bad Commit message] >> add a new feature

Your commit message does not follow Conventional Commits formatting
https://www.conventionalcommits.org/

Conventional Commits start with one of the below types, followed by a colon,
followed by the commit message:

    build chore ci docs feat fix perf refactor revert style test

Example commit message adding a feature:

    feat: implement new API

Example commit message fixing an issue:

    fix: remove infinite loop

Example commit with scope in parentheses after the type for more context:

    fix(account): remove infinite loop

Example commit with a body:

    fix: remove infinite loop

    Additional information on the issue caused by the infinite loop

Make a (conventional) commit ✔️:

$ git commit -m "feat: add a new feature"

[INFO] Initializing environment for ....
Conventional Commit......................................................Passed
- hook id: conventional-pre-commit
- duration: 0.05s

Install with pip

conventional-pre-commit can also be installed and used from the command line:

pip install conventional-pre-commit

Then run the command line script:

conventional-pre-commit [types] input

[types] is an optional list of Conventional Commit types to allow (e.g. feat fix chore)
input is a file containing the commit message to check:

conventional-pre-commit feat fix chore ci test .git/COMMIT_MSG

Or from a Python program:

from conventional_pre_commit.format import is_conventional

# prints True
print(is_conventional("feat: this is a conventional commit"))

# prints False
print(is_conventional("nope: this is not a conventional commit"))

# prints True
print(is_conventional("custom: this is a conventional commit", types=["custom"]))

Passing `args`

conventional-pre-commit supports a number of arguments to configure behavior:

$ conventional-pre-commit -h
usage: conventional-pre-commit [-h] [--force-scope] [--strict] [types ...] input

Check a git commit message for Conventional Commits formatting.

positional arguments:
  types          Optional list of types to support
  input          A file containing a git commit message

options:
  -h, --help     show this help message and exit
  --force-scope  Force commit to have scope defined.
  --strict       Force commit to strictly follow Conventional Commits formatting. Disallows fixup! style commits.

Supply arguments on the command-line, or via the pre-commit hooks.args property:

repos:
  - repo: https://github.com/compilerla/conventional-pre-commit
    rev: <git sha or tag>
    hooks:
      - id: conventional-pre-commit
        stages: [commit-msg]
        args: [--strict, --force-scope, feat, fix, chore, test, custom]

NOTE: when using as a pre-commit hook, input is supplied automatically (with the current commit's message).

Development

conventional-pre-commit comes with a VS Code devcontainer configuration to provide a consistent development environment.

With the Remote - Containers extension enabled, open the folder containing this repository inside Visual Studio Code.

You should receive a prompt in the Visual Studio Code window; click Reopen in Container to run the development environment inside the devcontainer.

If you do not receive a prompt, or when you feel like starting from a fresh environment:

Ctrl/Cmd+Shift+P to bring up the command palette in Visual Studio Code
Type Remote-Containers to filter the commands
Select Rebuild and Reopen in Container to completely rebuild the devcontainer
Select Reopen in Container to reopen the most recent devcontainer build

Versioning

Versioning generally follows Semantic Versioning.

Making a release

Releases to PyPI and GitHub are triggered by pushing a tag.

Ensure all changes for the release are present in the main branch
Tag with the new version: git tag vX.Y.Z for regular release, git tag vX.Y.Z-preN for pre-release
Push the new version tag: git push origin vX.Y.Z

License

Apache 2.0

Inspired by matthorgan's pre-commit-conventional-commits.

License

mihstaub/conventional-pre-commit

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