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grunt-contrib-compress v0.5.2 Build Status

Compress files and folders.

Getting Started

This plugin requires Grunt ~0.4.0

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-contrib-compress --save-dev

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


This plugin was designed to work with Grunt 0.4.x. If you're still using grunt v0.3.x it's strongly recommended that you upgrade, but in case you can't please use v0.3.2.

Compress task

Run this task with the grunt compress command.

Task targets, files and options may be specified according to the grunt Configuring tasks guide.

Node Libraries Used: archiver (for zip/tar) zlib (for gzip).



Type: String or Function

This is used to define where to output the archive. Each target can only have one output file. If the type is a Function it must return a String.


Type: String

This is used to define which mode to use, currently supports gzip, deflate, deflateRaw, tar, tgz (tar gzip) and zip.

Automatically detected per dest:src pair, but can be overridden per target if desired.

level (zip only)

Type: Integer Default: 1

Sets the level of archive compression.

Currently, gzip compression related options are not supported due to deficiencies in node's zlib library.


Type: Boolean Default: false

Pretty print file sizes when logging.

Usage Examples

// make a zipfile
compress: {
  main: {
    options: {
      archive: ''
    files: [
      {src: ['path/*'], dest: 'internal_folder/', filter: 'isFile'}, // includes files in path
      {src: ['path/**'], dest: 'internal_folder2/'}, // includes files in path and its subdirs
      {expand: true, cwd: 'path/', src: ['**'], dest: 'internal_folder3/'}, // makes all src relative to cwd
      {flatten: true, src: ['path/**'], dest: 'internal_folder4/', filter: 'isFile'} // flattens results to a single level
// gzip assets 1-to-1 for production
compress: {
  main: {
    options: {
      mode: 'gzip'
    expand: true,
    cwd: 'assets/',
    src: ['**/*'],
    dest: 'public/'
// use custom extension for the output file
compress: {
  main: {
    options: {
      mode: 'gzip'
    files: [
      // Each of the files in the src/ folder will be output to
      // the dist/ folder each with the extension .gz.js
      {expand: true, src: ['src/*.js'], dest: 'dist/', ext: '.gz.js'}
// use a function to return the output file
compress: {
  main: {
    options: {
      archive: function () {
        // The global value git.tag is set by another task
        return git.tag + '.zip'
    files: [
      {expand: true, src: ['src/*.js'], dest: 'dist/'}

Release History

  • 2013-06-03   v0.5.2   Allow custom extensions using the ext property.
  • 2013-05-28   v0.5.1   Avoid gzip on folders.
  • 2013-04-23   v0.5.0   Add support for deflate and deflateRaw.
  • 2013-04-15   v0.4.10   Fix issue where task finished before all data was compressed.
  • 2013-04-09   v0.4.9   Bump Archiver version.
  • 2013-04-07   v0.4.8   Open streams lazily to avoid too many open files.
  • 2013-04-01   v0.4.7   Pipe gzip to fix gzip issues. Add tests that undo compressed files to test.
  • 2013-03-25   v0.4.6   Fix node v0.8 compatibility issue with gzip.
  • 2013-03-20   v0.4.5   Update to archiver 0.4.1 Fix issue with gzip failing intermittently.
  • 2013-03-19   v0.4.4   Fixes for Node.js v0.10. Explicitly call grunt.file methods with map and filter.
  • 2013-03-14   v0.4.3   Fix for gzip; continue iteration on returning early.
  • 2013-03-13   v0.4.2   Refactor task like other contrib tasks. Fix gzip of multiple files. Remove unused dependencies.
  • 2013-02-22   v0.4.1   Pretty print compressed sizes. Logging each addition to a compressed file now only happens in verbose mode.
  • 2013-02-15   v0.4.0   First official release for Grunt 0.4.0.
  • 2013-01-23   v0.4.0rc7   Updating grunt/gruntplugin dependencies to rc7. Changing in-development grunt/gruntplugin dependency versions from tilde version ranges to specific versions.
  • 2013-01-14   v0.4.0rc5   Updating to work with grunt v0.4.0rc5. Conversion to grunt v0.4 conventions. Replace basePath with cwd.
  • 2012-10-12   v0.3.2   Rename grunt-contrib-lib dep to grunt-lib-contrib.
  • 2012-10-09   v0.3.1   Replace zipstream package with archiver.
  • 2012-09-24   v0.3.0   General cleanup. Options no longer accepted from global config key.
  • 2012-09-18   v0.2.2   Test refactoring. No valid source check. Automatic mode detection.
  • 2012-09-10   v0.2.0   Refactored from grunt-contrib into individual repo.

Task submitted by Chris Talkington

This file was generated on Tue Oct 29 2013 13:00:35.

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