grunt-aws-s3-gzip

Interact with AWS S3 using AWS SDK

This is a fork of grunt-aws-s3 with added GZip support and other minor improvements.

Warning

Versions 0.4.0 to 0.5.0 have a bug where options.params is ignored.
Version 0.8.0 doesn't actually support Node 0.8.x and 0.9.x.

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-aws-s3-gzip --save-dev

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

  grunt.loadNpmTasks('grunt-aws-s3');

The "aws_s3" task

Options

options.accessKeyId (required)

Type: String

The AWS accessKeyId. You can load it via JSON as shown in the example or use the AWS_ACCESS_KEY_ID environment variable.

options.secretAccessKey (required)

Type: String

The AWS secretAccessKey. You can load it via JSON as shown in the example or use the AWS_SECRET_ACCESS_KEY environment variable.

options.bucket (required)

Type: String

The AWS bucket name you want to upload to.

options.region

Type: String
Default: US Standard

The AWS region.

If not specified, it uploads to the default 'US Standard'

options.maxRetries

Type: Integer

The maximum amount of retries to attempt with a request.

options.sslEnabled

Type: Boolean

Whether to enable SSL for requests or not.

options.httpOptions

Type: Object

A set of options to pass to the low-level HTTP request. The list of option can be found in the documentation

options.access

Type: String
Default:public-read

The ACL you want to apply to ALL the files that will be uploaded. The ACL values can be found in the documentation.

options.uploadConcurrency

Type: Integer
Default: 1

Number of uploads in parallel. By default, there's no concurrency. Must be > 0. Note: This used to be called concurrency but the option has been deprecated, however it is still backwards compatible until 1.0.0.

options.downloadConcurrency

Type: Integer
Default: 1

Number of download in parallel. By default, there's no concurrency. Must be > 0.

options.params

Type: Object

A hash of the params you want to apply to the files. Useful to set the ContentEncoding to gzip for instance, or set the CacheControl value. The list of parameters can be found in the documentation. params will apply to all the files in the target. However, the params option in the file list has priority over it.

options.mime

Type: Object

The MIME type of every file is determined by a MIME lookup using node-mime. If you want to override it, you can use this option object. The keys are the local file paths and the values are the MIME types.

  {
    'path/to/file': 'application/json',
    'path to/other/file': 'application/gzip'
  }

You need to specify the full path of the file, including the cwd part.
The mime hash has absolute priority over what has been set in options.params and the params option of the file list.

options.stream

Type: Boolean
Default: false

Allows to use streams instead of buffers to upload and download. The option can either be turned on for the whole subtask or for a specified file object like so:

  {'action': 'upload', expand: true, cwd: 'dist/js', src: ['**'], stream: true}

options.debug

Type: Boolean
Default: false

This will do a "dry run". It will not upload anything to S3 but you will get the full report just as you would in normal mode. Useful to check what will be changed on the server before actually doing it. Unless one of your actions depends on another (like download following a delete), the report should be accurate.
listObjects requests will still be made to list the content of the bucket.

options.differential

Type: Boolean
Default: false

listObjects requests will be made to list the content of the bucket, then they will be checked against their local file equivalent (if it exists) using MD5 (and sometimes date) comparisons. This means different things for different actions:

• upload: will only upload the files which either don't exist on the bucket or have a different MD5 hash
• download: will only download the files which either don't exist locally or have a different MD5 hash and are newer.
• delete: will only delete the files which don't exist locally

The option can either be specified for the whole subtask or for a specified file object like so:

  {'action': 'upload', expand: true, cwd: 'dist/js', src: ['**'], differential: true}

In order to be able to compare to the local file names, it is necessary for dest to be a finished path (e.g directory/ instead of just dir) as the comparison is done between the file names found in cwd and the files found on the server dest. If you want to compare the files in the directory scripts/ in your bucket and the files in the corresponding local directory dist/scripts/ you need to have something like:

  {cwd: 'dist/scripts/', dest: 'scripts/', 'action': 'download', differential: true}

options.displayChangesOnly

Type: Boolean

Default: false

If enabled, only lists files that have changed when performing a differential upload.

options.gzip

Type: Boolean

Default: true

Compress files on the fly using gzip and add the ContentEncoding: gzip header.

options.excludeFromGzip

Type: Array<String> or String

Default: None

If options.gzip is specified, files matching this pattern will not be compressed.

{ gzip: true, excludeFromGzip: ['*.png', '*.jpg', '*.jpeg'] }

Actions

This Grunt task supports three modes of interaction with S3, upload, download and delete. Every action that you specify is executed serially, one after the other. If multiple upload actions are one after the other, they will be grouped together.

You choose the action by specifying the key action in the file hash like so:

  {'action': 'upload', expand: true, cwd: 'dist/js', src: ['**'], dest: 'app/js/'}

By default, the action is upload.

upload

The upload action uses the newest Grunt file format, allowing to take advantage of the expand and filter options.
It is the default action, so you can omit action: 'upload' if you want a cleaner look.

  files: [
    {expand: true, cwd: 'dist/staging/scripts', src: ['**'], dest: 'app/scripts/'},
    {expand: true, cwd: 'dist/staging/styles', src: ['**'], dest: 'app/styles/', action: 'upload'}
  ]

You can also include a params hash which will override the options.params one. For example:

  
  params: {
    ContentType: 'application/json'
    CacheControl: '3000'
  }
 
  // ...
 
  files: [
    {expand: true, cwd: 'dist/staging/scripts', src: ['**'], dest: 'app/scripts/', params: {CacheControl: '2000'}},
    {expand: true, cwd: 'dist/staging/styles', src: ['**'], dest: 'app/styles/'}
  ]

This will yield for the params which will eventually be applied:

  {
    ContentType: 'application/json',
    CacheControl: '2000'
  }
 
  // AND
 
  {
    ContentType: 'application/json',
    CacheControl: '3000'
  }

The options.mime hash, however, has priority over the ContentType. So if the hash looked like this:

  {
    'dist/staging/styles/LICENCE': 'text/plain'
  }

The ContentType eventually applied to dist/staging/styles/LICENCE would be text/plain even though we had a ContentType specified in options.params or in params of the file.

When the differential option is enabled, it will only upload the files which either don't exist on the bucket or have a different MD5 hash.

download

The download action requires a cwd, a dest and no src like so:

  {cwd: 'download/', dest: 'app/', action: 'download'}

The dest is used as the Prefix in the listObjects command to find the files on the server (which means it can be a path or a partial path). The cwd is used as the root folder to write the downloaded files. The inner folder structure will be reproduced inside that folder.

If you specify '/' for dest, the whole bucket will be downloaded. It handles automatically buckets with more than a 1000 objects.
If you specify 'app', all paths starting with 'app' will be targeted (e.g. 'app.js', 'app/myapp.js', 'app/index.html, 'app backup/donotdelete.js') but it will leave alone the others (e.g. 'my app/app.js', 'backup app/donotdelete.js').

When the differential options is enabled, it will only download the files which either don't exist locally or have a different MD5 hash and are newer.

Note: if dest is a file, it will be downloaded to cwd + file name. If dest is a directory ending with /, its content will be downloaded to cwd + file names or directories found in dest. If dest is neither a file nor a directory, the files found using it as a prefix will be downloaded to cwd + paths found using dest as the prefix.

The download action can also take an exclude option like so:

  {cwd: 'download/', dest: 'app/', action: 'download', exclude "**/.*"}

The value is a globbing pattern that can be consumed by grunt.file.isMatch. You can find more information on globbing patterns on Grunt's doc. In this example, it will exclude all files starting with a . (they won't be downloaded). If you want to reverse the exclude (that is, only what will match the pattern will be downloaded), you can use the flipExclude option like so:

  {cwd: 'download/', dest: 'app/', action: 'download', exclude "**/.*", flipExclude: true}

In this example, only the files starting with a . will be downloaded.

Example:

  {cwd: 'download/', dest: 'app/', action: 'download'} // app/myapp.js downloaded to download/myapp.js
  {cwd: 'download/', dest: 'app/myapp.js', action: 'download'} // app/myapp.js downloaded to download/myapp.js
  {cwd: 'download/', dest: 'app', action: 'download'} // app/myapp.js downloaded to download/app/myapp.js

delete

The delete action just requires a dest, no need for a src like so:

  {dest: 'app/', 'action': 'delete'}

The dest is used as the Prefix in the listObjects command to find the files on the server (which means it can be a path or a partial path).

If you specify '/', the whole bucket will be wiped. It handles automatically buckets with more than a 1000 objects.
If you specify 'app', all paths starting with 'app' will be targeted (e.g. 'app.js', 'app/myapp.js', 'app/index.html, 'app backup/donotdelete.js') but it will leave alone the others (e.g. 'my app/app.js', 'backup app/donotdelete.js').

When the differential options is enabled, it will only delete the files which don't exist locally. It also requires a cwd key with the path to the local folder to check against.

Please, be careful with the delete action. It doesn't forgive.

The delete action can also take an exclude option like so:

  {dest: 'app/', 'action': 'delete', exclude "**/.*"}

The value is a globbing pattern that can be consumed by grunt.file.isMatch. You can find more information on globbing patterns on Grunt's doc. In this example, it will exclude all files starting with a . (they won't be deleted). If you want to reverse the exclude (that is, only what will match the pattern will be deleted), you can use the flipExclude option like so:

  {dest: 'app/', 'action': 'delete', exclude "**/.*", flipExclude: true}

In this example, only the files starting with a . will be deleted.

Usage Examples

The example loads the AWS credentials from a JSON file (DO NOT forget to exclude it from your commits).

  {
    "AWSAccessKeyId": "AKxxxxxxxxxx",
    "AWSSecretKey": "super-secret-key"
  }

aws: grunt.file.readJSON('aws-keys.json'), // Read the file
 
aws_s3: {
  options: {
    accessKeyId: '<%= aws.AWSAccessKeyId %>', // Use the variables
    secretAccessKey: '<%= aws.AWSSecretKey %>', // You can also use env variables
    region: 'eu-west-1',
    uploadConcurrency: 5, // 5 simultaneous uploads
    downloadConcurrency: 5, // 5 simultaneous downloads
    excludeFromGzip: ['*.png', '*.jpg', '*.jpeg']
  },
  staging: {
    options: {
      bucket: 'my-wonderful-staging-bucket',
      differential: true // Only uploads the files that have changed
    },
    files: [
      {dest: 'app/', cwd: 'backup/staging/', action: 'download'},
      {expand: true, cwd: 'dist/staging/scripts/', src: ['**'], dest: 'app/scripts/'},
      {expand: true, cwd: 'dist/staging/styles/', src: ['**'], dest: 'app/styles/'},
      {dest: 'src/app', action: 'delete'},
    ]
  },
  production: {
    options: {
      bucket: 'my-wonderful-production-bucket'
      params: {
        ContentEncoding: 'gzip' // applies to all the files!
      }
      mime: {
        'dist/assets/production/LICENCE': 'text/plain'
      }
    },
    files: [
      {expand: true, cwd: 'dist/production/', src: ['**'], dest: 'app/'},
      {expand: true, cwd: 'assets/prod/large', src: ['**'], dest: 'assets/large/', stream: true}, // enable stream to allow large files
      {expand: true, cwd: 'assets/prod/', src: ['**'], dest: 'assets/', params: {CacheControl: '2000'},
      // CacheControl only applied to the assets folder
      // LICENCE inside that folder will have ContentType equal to 'text/plain'
    ]
  },
  clean_production: {
    options: {
      bucket: 'my-wonderful-production-bucket',
      debug: true // Doesn't actually delete but shows log
    },
    files: [
      {dest: 'app/', action: 'delete'},
      {dest: 'assets/', exclude: "**/*.tgz", action: 'delete'}, // will not delete the tgz
      {dest: 'assets/large/', exclude: "**/*copy*", flipExclude: true, action: 'delete'}, // will delete everything that has copy in the name
    ]
  },
  download_production: {
    options: {
      bucket: 'my-wonderful-production-bucket'
    },
    files: [
      {dest: 'app/', cwd: 'backup/', action: 'download'}, // Downloads the content of app/ to backup/
      {dest: 'assets/', cwd: 'backup-assets/', exclude: "**/*copy*", action: 'download'}, // Downloads everything which doesn't have copy in the name
    ]
  },
  secret: {
    options: {
      bucket: 'my-wonderful-private-bucket',
      access: 'private'
    },
    files: [
      {expand: true, cwd: 'secret_garden/', src: ['*.key'], dest: 'secret/'},
    ]
  },
},

Todos

• Better testing (params, sync, etc.)

Release History

• 2014-05-04   v0.8.5   New option to display changes only
• 2014-04-26   v0.8.4   Fix bug in setImmediate support detection
• 2014-04-26   v0.8.2-3 Unpublished because of faulty version
• 2014-01-09   v0.8.1   Shim setImmediate to support Node 0.8.x
• 2014-01-08   v0.8.0   Refactor to add stream option. Exclude option. Fixes.
• 2013-11-27   v0.7.2   Follow Grunt 0.4.2 guidelines, add more options, fix download bugs
• 2013-09-24   v0.7.1   Compensate for missing marker in listObject
• 2013-09-09   v0.7.0   Code restructure. New differential option. Tests.
• 2013-08-21   v0.6.0   Add 'download' option. Multiple fixes.
• 2013-08-20   v0.5.0   Add option to override automatic MIME type detection
• 2013-08-19   v0.4.1   Fix delete task executing separately from upload
• 2013-08-14   v0.4.0   Add 'delete' option
• 2013-07-30   v0.3.1   Region is now optional, defaults to US Standard
• 2013-07-17   v0.3.0   Option for concurrency
• 2013-07-16   v0.2.0   Can set additional params
• 2013-07-11   v0.1.1   Fix bug when using env variable
• 2013-07-10   v0.1.0   First release

For a proper list of changes, take a look at the changelog