grunt-injector

Inject references to files into other files (think scripts and stylesheets into an html file)

npm install grunt-injector
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grunt-injector

Inject references to files into other files (think scripts and stylesheets into an html file)

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-injector --save-dev

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

grunt.loadNpmTasks('grunt-injector');

The "injector" task

Overview

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

grunt.initConfig({
  injector: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      // Target-specific file lists and/or options go here.
    },
  },
})

Options

options.template

Type: String Defaulting to dest property of file group

The filename for the source template where you have your injection tags. If not provided, the given dest file must exist and will be used as source template as well, and therefor will be modified on injection.

options.templateString

Type: String Default value: NULL

The contents of the template to use. If specified it overrides the template option.

options.ignorePath

Type: String|Array Default value: NULL

A path or paths that should be removed from each injected file path.

options.addRootSlash

Type: Boolean Default value: true

Specifies if a root slash (/) should be added to all paths.

options.destFile

Type: String Default value: NULL

Used to override the dest property of file groups, which is necessary when using dynamically built files objects.

options.min

Type: Boolean Default value: false

If set to true each injected file will be switched to its minified counterpart (i.e. *.min. files), if it exists that is otherwise the original file is used as usual.

options.starttag

Type: String Default value: <!-- injector:{{ext}} -->

Set the start tag that the injector is looking for. {{ext}} is replaced with file extension name, e.g. "css", "js" or "html". The extension for files collected from from Bower components is prepended with option bowerPrefix if given.

options.endtag

Type: String Default value: <!-- endinjector -->

Set the end tag that the injector is looking for. {{ext}} is replaced with file extension name, e.g. "css", "js" or "html". The extension for files collected from from Bower components is prepended with option bowerPrefix if given.

options.bowerPrefix

Type: String Default value: NULL

Set prefix for file extension when replacing {{ext}} in start and end tag (see above). Added in v.0.5.0. To keep old behaviour set this to "bower:". See Bower dependency injection below as well.

options.transform

Type: Function Params: filepath, index (0-based file index), length (total number of files to inject) Default value: a function that returns:

  • For css files: <link rel="stylesheet" href="<filename>.css">
  • For js files: <script src="<filename>.js"></script>
  • For html files: <link rel="import" href="<filename>.html">

Used to generate the content to inject for each file.

options.sort

Type: Function Params: a, b (is used as compareFunction for Array.prototype.sort) Default value: NULL

If set the given function is used as the compareFunction for the array sort function, to sort the source files by.

N.B. Shouldn't be used in conjunction with a bower.json file as source, because wiredep, which collects Bower installed dependencies, has some intelligent sorting built in.

Usage Examples

Injecting into html file with default options

index.html:

<!DOCTYPE html>
<html>
<head>
  <title>Example</title>
  <!-- injector:css -->
  <!-- endinjector -->
</head>
<body>

  <!-- injector:js -->
  <!-- endinjector -->
</body>
</html>

Gruntfile.js:

grunt.initConfig({
  injector: {
    options: {},
    local_dependencies: {
      files: {
        'index.html': ['**/*.js', '**/*.css'],
      }
    }
  }
})

After injection

index.html:

<!DOCTYPE html>
<html>
<head>
  <title>Example</title>
  <!-- injector:css -->
  <link rel="stylesheet" href="file1.css">
  <link rel="stylesheet" href="file2.css">
  <!-- endinjector -->
</head>
<body>

  <!-- injector:js -->
  <script src="file1.js"></script>
  <script src="file2.js"></script>
  <!-- endinjector -->
</body>
</html>

Bower dependency injection

The grunt-injector can be used to inject your installed Bower Components as well. To do this the module wiredep is used, and here's how the configuration can look like in that case:

N.B From version 0.5.0 the {{ext}} in the starttag is not prefixed with bower: by default anymore! To keep the old behaviour set the bowerPrefix to "bower:".

Gruntfile.js:

grunt.initConfig({
  injector: {
    options: {},
    bower_dependencies: {
      files: {
        'index.html': ['bower.json'],
      }
    }
  }
})

index.html:

<!DOCTYPE html>
<html>
<head>
  <title>Example</title>
  <!-- injector:css -->
  <!-- endinjector -->
</head>
<body>

  <!-- injector:js -->
  <!-- endinjector -->
</body>
</html>

Other configurations

For more advanced task configurations see the Gruntfile.js in this repository and have a look at the tests in test/injector_test.js.

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.

Release History

0.5.2 - 2014-03-05 - Getting bower components directory from .bowerrc file if it exists (Fixes: #2)

0.5.1 - 2014-02-21 - Adding addRootSlash option (Fixes: #1)

0.5.0 - 2013-12-29 - Removing the default bower: prefix for Bower injections (see Bower dependency injection above)

0.4.1 - 2013-12-23 - Fixing index and length params for transform function

0.4.0 - 2013-12-23 - Adding templateString option

0.3.1 - 2013-12-15 - Fixing possibility to provide ignorePath as array

0.3.0 - 2013-12-10 - Adding sort option to be able to sort files. Also rewriting for performance which removes unnecessary injections for dynamic file objects

0.2.0 - 2013-11-20 - Don't write to destination file if it hasn't been changed by the injector (useful to not trigger any unnecessary watch tasks if applicable)

0.1.2 - 2013-11-17 - Making it possible to only provide destFile and not template

0.1.1 - 2013-11-17 - ignorePath now only removes from start of path

0.1.0 - 2013-11-17 - First release

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