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@lunde/serverless-bundle

v1.0.3

Published

Builds Serverless Webpack bundles and syncs them to S3

Downloads

3

Readme

MIT license


@lunde/serverless-bundle

A Serverless plugin that bundles your application with Webpack and uploads it to an S3 bucket. This is useful for including static assets in web apps that run in Lambda functions, as well as static web apps.

Installation

npm i @lunde/serverless-bundle

yarn add @lunde/serverless-bundle

Usage

# serverless.yml
plugins:
  - @lunde/serverless-bundle

custom:
  bundle:
    'webpack.config.js':
      params:
        maxRetries: 5
      bucket:
        name: test-lunde-public-0
       object:
        '**/*.js':
          # file, filename, basename, dirname, publicPath, ext
          key: 'customized/[file].key[ext]'
          params:
          contentType: 'auto'
          cacheControl: 'public, immutable, max-age=31536000'
        '*':
          params:
          ACL: 'public-read'

Configuring AWS credentials

By default credentials are read through the provider.profile property in your config. If that property doesn't exist or is different than the credentials you'd like to configure for setting up your bucket, they can be configured through custom.bundle.credentials

Parameters

  • profile {string}
    • Your AWS profile in ~/.aws/credentials

To use credentials without a profile set the params below

  • accessKeyId {string}
    • The AWS access key ID
  • secretAccessKey {string}
    • The AWS secret access key

Example

custom:
  bundle:
    'webpack.config.js':
      credentials:
        profile: lunde-s3

Configuring the AWS.S3 constructor

Location in config: custom.bundle.params

See the S3() API for a complete list of parameters.

custom:
  bundle:
    'webpack.config.js':
      params:
      maxRetries: 3

Commands

sls bundle

This command bundles your application with Webpack.

Configuring

Location in config: custom.bundle.[webpackConfigFile]

  • webpackConfigFile is relative to the serverless.yml service file

sls sync-bundle

This command uploads your bundle to S3. Any assets emitted by your Webpack compilation will be uploaded by this command unless custom.bundle.object.[glob].exclude is true.

The upload process is highly granular. With glob matching you can attach specific parameters and metadata to individual files or file types with ease.

Configuring

Location in config: custom.bundle.[webpackConfigFile]

Parameters

  • bucket
    • name {string}
      • The name of your S3 bucket
    • prefix {string}
      • A default prefix for your bucket objects
    • retain {bool}
      • default false
      • If retain is set to true, this bucket will not be emptied when sls remove is run. Otherwise, the bucket will be emptied each time that happens within the defined prefix above.
    • credentials {object}
      • profile {string}
        • The AWS profile to use
      • accessKeyId {string}
        • If not using a profile, use keys directly
      • secretAccessKey {string}
  • object
    • Object groups are determined via glob patterns defined in custom.bundle.object, where a pattern of * is applied to all files. The config for each glob is deep merged in the order they appear in the serverless.yml, top-down. The merging algorithm can be seen here.
    • key {string}
      • default [filename]
      • A pattern-based string which allows you to further customize where your files wind up in your S3 bucket.
      • Patterns
        • [filename]
          • The filename emitted by Webpack
        • [file]
          • The name of the file without its extension
        • [ext]
          • The file extension
        • [basename]
          • The file and the ext without a directory name
        • [dirname]
          • The filename without a basename
    • exclude {bool}
      • If true any file matching this glob will not be uploaded to S3
    • params {object}
      • The params object sent in S3.upload()
      • Any parameter defined in the S3.upload() API can be defined here.
      • defaults
        • bucket
          • The bucket name defined in custom.bundle.bucket.name
        • key
          • The key pattern filled from the key parameter above
        • contentType
          • By default this command fills in the contentType for you via mime.getType() You can override the default by providing your own contentType

Example

In this example all javascript files are provided parameters for **/*.js and *. All other files are only provided with parameters for *.

custom:
  bundle:
    'webpack.config.js':
      bucket:
        name: 'my-bucket'
        retain: true
      object:
        '**/*.js':
          # file, filename, basename, dirname, ext
          key: '[filename]'
           params:
            ACL: 'public-read'
            contentType: 'application/javascript'
            cacheControl: 'public, immutable, max-age=31536000'
        '*':
          params:
            # This key would override the key in '**/*.js'
            key: '[filename].dryrun'
            metadata:
              serverless-bundle: yes

LICENSE

MIT