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grunt-git-commits

Enforce commit message format using Grunt

Getting Started

This plugin requires Grunt ~0.4.5

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-git-commits --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-git-commits');

The "commits" task

Overview

In your project's Gruntfile, add a section named commits to the data object passed into grunt.initConfig().

grunt.initConfig({
  commits: {
    options: {
      format: /^(Add|Update|Fix|Remove|Docs|Deps):/
      begin: 'some-sha',
      noMerge: true,
      strict: true
    }
  },
});

Options

options.format

Type: RegExp Default value: /.*/

Regular Expression to match commit messages after. The example above requires messages to have a certain tag prepended. Another common style is [some-module] some message, which would be /\[([^]]+)\]/ or /^\[(tag1|tag2)\]/. Another popular formatting rule is Tim Pope's commit message guidelines, which can be enforced with:

var format = new RegExp('^[A-Z][^\n]{0,49}' + //First line should start with capital letter and be <= 50 chars
                        '(' +
                          '\n\n' + //If more lines follow, enforce an empty line
                          '([^\n]{0,69}(\n|$))+' + //70 chars on each line, end with a newline, unless it's the last line. Repeat at least once.
                        ')?'); //However, all of this is optional

options.begin

Type: String Default value: null

Start matching messages (inclusive) after sha. This allows one to enforce the format in a older project without having to rewrite the history. To make this exclusive append ^, ie. ff432d^.

options.noMerge

Type: Boolean Default value: true

Ignore merge commits.

options.strict

Type: Boolean Default value: true

Fail the build if any of the messages are incorrect according to format. Incorrect messages will still be logged as errors, but the build will proceed.

options.cwd

Type: String Default value: .

The directory in which the git commands should be executed. You should probably leave this one alone.

Usage Examples

Default Options

The minimum configuration is to specify a format.

grunt.initConfig({
  commits: {
    options: {
      format: /^(Add|Update|Fix|Remove|Docs|Deps):/
    },
    files: [{
      cwd: 'test/fixtures'
    }]
  }
});

Custom Options

Here we start enforcing format from commit f1c4c51, ignoring merge commits. Also note that strict: false prints all incorrect commits as errors, but allows the build to proceed.

grunt.initConfig({
  commits: {
    options: {
      begin: 'f1c4c51',
      format: /^(Add|Update|Fix|Remove|Docs|Deps):/,
      noMerges: true,
      strict: false
    },
    files: [{
      cwd: 'test/fixtures'
    }]
});

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

License

ISC © Emil Bay

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