pre-commit-git-checks

A series of basic Git checks meant for linting of your work.

Contents

• pre-commit-git-checks
  • Installation
    • Python package
    • pre-commit hook
  • Usage
    • Python CLI
    • Hooks
  • License

Installation

This tool can be installed as a Python package or a pre-commit hook.

Python package

Install using pip with:

pip install pre-commit-git-checks

pre-commit hook

pre-commit is a framework that is used for the automated identification of issues in software.

pre-commit-git-checks can be run as a Git hook script before submitting your code.

To install pre-commit follow the steps here.

You can see how to integrate a specific hook in the section below.

Usage

Python CLI

You can run this tool from the command line.

To see the help dialog:

$ pgchecks --help

Usage: pgchecks [OPTIONS] COMMAND [ARGS]...

  A pre-commit checking tool for Git

Options:
  --help  Show this message and exit.

Commands:
  signoff  Checks your Git commit messages for a signoff

Example usage:

$ pgchecks signoff

[ERROR] Sign-off message expected to be 'Signed-off-by: Kostas Doe <kdoe@email.com>'.
[INFO] Check your current git configuration (`git config -l`) and run `git commit --signoff` to signoff.

Hooks

In your .pre-commit-config.yaml file add:

- repo: https://github.com/KAUTH/pre-commit-git-checks
  rev: ''  # Use the SHA or tag you want to point to
  hooks:
    - id: git-signoff
      stages: [commit-msg]

To install the hook(s) run:

• For git-signoff:

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

Note

Running the pre-commit install --hook-type <hook-type> command will install all the hooks that include in their stages the <hook-type> value (e.g., commit-msg). Keep in mind that hooks that do not have stages defined are by default set to all stages, and therefore will always also be installed to the given <hook-type> as well. You can find more details here.

To run individual hooks use:

pre-commit run --hook-stage <stage> <hook_id>

git-signoff

What

With the command git commit --signoff/-s a committer adds a Signed-off-by trailer at the end of the commit log message.

This hook ensures that the committed message has been signed off with the information of the Git user.

The corresponding CLI command ensures that the commit message that is currently checked out has been signed off with the information of the Git user.

Note

The purpose of this hook is to identify commit messages that have not been explicitly signed off by the committer, and not to automatically add a Signed-off-by line to the message.

Why

As mentioned in the git commit documentation:

The meaning of a signoff depends on the project to which you’re committing. For example, it may certify that the committer has the rights to submit the work under the project’s license or agrees to some contributor representation, such as a Developer Certificate of Origin. (See http://developercertificate.org for the one used by the Linux kernel and Git projects.) Consult the documentation or leadership of the project to which you’re contributing to understand how the signoffs are used in that project.

How

The pre-commit hook and script command checks:

• If a user.name Git configuration is set at a local level first or a global level and throws an error in the case it is not set in any scope. The same happens for the user.email configuration.
• If the user.name configuration resembles the format 'Your Name' and throws a warning in case it does not.
• If the user.email configuration resembles the format of an email and throws a warning in case it does not.
• If the Git commit message is singed off with the currently set up user.name and user.email configurations and throws an error in case it does not.

Sign-off message is expected to be: 'Signed-off-by: {user.name} <{user.email}>'

When

The hook runs right after you save your commit message, as a commit-msg hook (see https://git-scm.com/docs/githooks#_commit_msg). If the script exits non-zero, Git aborts the commit process.

For more information check out the pre-commit documentation, https://pre-commit.com/#pre-commit-for-commit-messages.

License

MIT License