grunt-usebanner

grunt-banner

Adds a simple banner to files

Getting Started

This plugin requires Grunt ~0.4.1

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-banner --save-dev

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

grunt.loadNpmTasks('grunt-banner');

Or if you are using matchdep it will be included along with other grunt-* tasks by using this line of JS:

require('matchdep').filterDev('grunt-*').forEach(grunt.loadNpmTasks);

The "usebanner" task

grunt-banner renamed it’s task from banner to usebanner as a banner is often used to hold a banner template for a number of grunt plugins

Overview

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

The wildcard selector * is perfectly valid for selecting targets to add a banner to.

grunt.initConfig({
  usebanner: {
    taskName: {
      options: {
        position: 'top' || 'bottom',
        banner: '// banner text <%= templates encouraged %>',
        linebreak: true || false
      },
      files: {
        src: [ 'path/to/file.ext', 'path/to/another/*.ext' ]
      }
    }
  }
})

Options

options.position

Type: String Default value: 'top Value range: 'top' or 'bottom' only

The position to place the banner - either the top or bottom (other values will default to top)

options.banner

Type: String Default value: ``

The text to use as a banner. Templated strings are perfectly acceptable and encouraged.

options.pattern

Type: String

Allows the banner to be added only if the supplied pattern matches.

options.linebreak

Type: Boolean Default value: true

Set linebreak to true to add a line break between banner and file content.

options.process

Type: Function

Allows the banner to be generated for each file using the output of the process function.

Usage Examples

Basic Usage

In this example an appConfig is read from a JSON file and used to populate a banner template which is then used by grunt-banner to place at the top of some files. Each file in the array will have the banner placed on to it and all .js files in the /more-scripts/ folder will have a banner thanks to the * wildcard.

var appConfig = grunt.file.readJSON( 'app-config.json' ) || {};
grunt.initConfig({
  banner: '/* <%= appConfig.info.name %> - version <%= appConfig.info.version %> - ' +
          '<%= grunt.template.today("dd-mm-yyyy") %>\n' +
          '<%= appConfig.info.description %>\n ' +
          '&#169 <%= grunt.template.today("yyyy") %> <%= appConfig.info.author.name %> ' +
          '- <%= appConfig.info.author.email %> */\n',
  usebanner: {
    dist: {
      options: {
        position: 'top',
        banner: '<%= banner %>'
      },
      files: {
        src: [ 'scripts/main-min.js', 'stylesheets/main-min.css', 'more-scripts/*.js' ]
      }
    }
  }
})

Process Usage

By supplying a process function you effectively take control of how the banner is generated, the task is still responsible for placing it. In essence, it replaces the need for a banner object being specified in your grunt config as you are creating it from code for each file. This gives you the flexibility to add file-specific data to your banners.

This example uses grunt templating to generate a banner that references the file name it is being appended to. Run the test cases to see this in action.

usebanner: {
  dist: {
    options: {
      position: 'top',
      process: function( filepath )
        return grunt.template.process(
          '// banner for file: <%= filename %>',
          { data: {
            filename: filepath.match(/\/([^/]*)$/)[1]
          } } );
        }
      },
      files: {
        src: [ 'test/tmp/someProcess.js' ]
      }
  }
}

Notes

grunt-banner simply adds the banner to the head or foot of the files that are specified by the array passed to files.src, it makes no attempt to see if a banner already exists and it is up to the user to ensure that the file should not already contain a banner. To this end it is recommended to use the grunt-contrib-clean task and only add banners to production-ready code.

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.

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Task submitted by Matt Styles @personalurban