This node.js module makes sure your git commit messages consistently follow one of these style guides:

1. jQuery Commit Guidelines
2. AngularJS Commit Guidelines

You can also start with one of these and customize the validation rules.

npm install commitplease --save-dev

A git version of 1.8.5 or newer is recommended. If you use git commit --verbose, it is required.

Commit as usual. This module is triggered by a git commit-msg hook and automatically validates your messages as you commit them. Invalid messages will be rejected, with details on what's wrong and a copy of the input.

The following ways to begin a commit message are special and always valid:

1. 0.0.1 or any other semantic version
2. WIP, Wip or wip which means "work in progress"
3. Merge branch [...] or Merge <commitish> into <commitish>
4. fixup! or squash! which are generated by git commit --fixup and --squash

Common commit messages follow one of the style guides (jQuery Commit Guidelines by default)

You can configure commitplease from package.json of your project. Here are the options common for all style guidelines:

{
  "commitplease": {
    "limits": {
      "firstLine": "72",
      "otherLine": "80"
    },
    "nohook": false,
    "markerPattern": "^(clos|fix|resolv)(e[sd]|ing)",
    "actionPattern": "^([Cc]los|[Ff]ix|[Rr]esolv)(e[sd]|ing)\\s+[^\\s\\d]+(\\s|$)",
    "ticketPattern": "^(Closes|Fixes) (.*#|gh-|[A-Z]{2,}-)[0-9]+",
  }
}

• limits.firstLine and limits.otherLine are the hard limits for the number of symbols on the first line and on other lines of the commit message, respectively.
• "nohook": false tells commitplease to attempt to install its own commit-msg hook. Setting "nohook": true can be used when wrapping the commitplease validation API into another module, like a grunt plugin or husky

The following options are experimental and are subject to change:

• markerPattern: A (intentionally loose) RegExp that indicates that the line might be a ticket reference. Case insensitive.
• actionPattern: A RegExp that makes a line marked by markerPattern valid even if the line does not fit ticketPattern
• ticketPattern: A RegExp that detects ticket references: Closes gh-1, Fixes gh-42, WEB-451 and similar.

The ticket reference match will fail only if markerPattern succeeds and both ticketPattern and actionPattern fail.

When overwriting these patterns in package.json, remember to escape special characters.

Here is how to use and configure validation for jQuery Commit Guidelines:

{
  "commitplease": {
    "style": "jquery",
    "component": true,
    "components": []
  }
}

• "style": "jquery" selects jQuery Commit Guidelines
• "component": true requires a component followed by a colon, like Test: or Docs:
• "components": [] is a list of valid components. Example: "components": ["Test", "Docs"]. When this list is empty, anything followed by a colon is considered to be a valid component name.

Here is how to use and configure validation for AngularJS Commit Guidelines

{
  "commitplease": {
    "style": "angular",
    "types": [
      "feat", "fix", "docs", "style", "refactor", "perf", "test", "chore"
    ],
    "scope": "\\S+.*"
  }
}

• "style": "angular" selects AngularJS Commit Guidelines
• "types" is an array of allowed types
• "scope": "\\S+.*" is a string that is the regexp for scope. By default it means "at least one non-space character"

When using commitplease together with husky, the following will let husky manage all the hooks and trigger commitplease:

{
  "scripts": {
    "commitmsg": "commitplease"
  },
  "commitplease": {
    "nohook": true
  }
}

However, since husky does not use npm in silent mode (and there is no easy way to make it do so), there will be a lot of additional output when a message fails validation. Therefore, using commitplease alone is recommended.

var validate = require('commitplease/lib/validate');
var errors = validate(commit.message);
if (errors.length) {
  postComment('This commit has ' + errors.length + ' problems!');
}

validate(message[, options]), returns Array

• message (String): the commit message to validate. Must use LF (\n) as line breaks.
• options (Object, optional): use this to override the default settings
• returns Array: empty for valid messages, one or more items as String for each problem found

{
  "name": "awesomeproject",
  "description": "described",
  "devDependencies": {
    "commitplease": "latest",
  },
  "commitplease": {
    "style": "jquery",
    "components": ["Docs", "Tests", "Build", "..."],
    "markerPattern": "^((clos|fix|resolv)(e[sd]|ing))|(refs?)",
    "ticketPattern": "^((Closes|Fixes) ([a-zA-Z]{2,}-)[0-9]+)|(Refs? [^#])"
  }
}

{
  "name": "awesomeproject",
  "description": "described",
  "devDependencies": {
    "commitplease": "latest",
  },
  "commitplease": {
    "style": "angular",
    "markerPattern": "^((clos|fix|resolv)(e[sd]|ing))|(refs?)",
    "ticketPattern": "^((Closes|Fixes) ([a-zA-Z]{2,}-)[0-9]+)|(Refs? [^#])"
  }
}

Copyright Jörn Zaefferer
Released under the terms of the MIT license.

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