Sentry plugin

A webpack (v1 or 2) plugin to upload source maps to Sentry.

Installation

Using npm:

$ npm install webpack-sentry-plugin --save-dev

Using yarn:

$ yarn add webpack-sentry-plugin --dev

Usage

1. Require webpack-sentry-plugin:

   var SentryPlugin = require('webpack-sentry-plugin');

2. Configure webpack to output source maps. Recommended reading: webpack docs, Sentry docs

3. Add to webpack config:

   var config = {
     plugins: [
       new SentryPlugin({
         // Sentry options are required
         organisation: 'your-organisation-name',
         project: 'your-project-name',
         apiKey: process.env.SENTRY_API_KEY,
         
         // Release version name/hash is required
         release: function() {
           return process.env.GIT_SHA
         }
       })
     ]
   }

Options

• organisation: Required, Sentry organisation to upload files to

• project: Required, Sentry project to upload files to

• apiKey: Required, Sentry api key (Generate one here, ensure that project:write, project:read and project:releases are selected ,under scopes)

• release: Required, string or function that returns the release name. See What is a release? below for details

• exclude: RegExp to match for excluded files

  var config = {
    plugins: [
      new SentryPlugin({
        // Exclude uploading of html
        exclude: /\.html$/,
        ...
      })
    ]
  }

• include: RegExp to match for included files

  var config = {
    plugins: [
      new SentryPlugin({
        // Only upload foo.js & foo.js.map
        include: /foo.js/,
        ...
      })
    ]
  }

• filenameTransform: Function to transform filename before uploading to Sentry. Defaults to prefixing filename with ~/, which is used by Sentry as a host wildcard

  var config = {
    plugins: [
      new SentryPlugin({
        filenameTransform: function(filename) {
          return 'a-filename-prefix-' + filename
        }
      })
    ]
  }

• suppressErrors: Display warnings instead of failing webpack build - useful in case webpack compilation is done during deploy on multiple instances

• baseSentryURL: URL of Sentry instance. Shouldn't need to set if using sentry.io, but useful if self hosting

• deleteAfterCompile: Boolean determining whether source maps should be deleted after the webpack compile finishes. Defaults to false

What is a release?

A release is a concept that Sentry uses to attach source maps to a known version of your code. The plugin creates one for you, but you need to provide a "name" for a particular version of your code, which is just a string. Sentry can then use the release to say that a it found an error in this known version of your code.

Passing the string to the plugin really depends on your setup. There are three main approaches:

A git commit hash is very useful for releases - it is a string that defines a particular version of your code. For example, deploying to Heroku with a git hook, you can access a SOURCE_VERSION environment variable that is the latest commit's hash. CircleCI provides the git hash in a CIRCLE_SHA1 environment variable. Travis provides TRAVIS_COMMIT. To supply it to the plugin you can configure the release option to be a function that returns the hash:

new SentryPlugin({
  // ...
  release: function() {
    // Note: this is just an example, it depends on your deployment pipeline 
    return process.env.SOURCE_VERSION;
  }
});

Alternatively you can use the webpack build hash. This is generated by webpack and is based on the contents of the build - so if you change the code, the hash also changes. This also is useful for Sentry releases as it identifies a particular version of your code. The plugin provides the webpack hash to you as the first argument to the release function:

new SentryPlugin({
  // ...
  release: function(hash) {
    return hash; // webpack build hash
  }
});

The final option is to manually provide a string to the release option:

new Sentry Plugin({
  // ...
  release: 'foo-release'
});

Keep in mind that this string will need to change when you update your code. The other options above are recommended.

Post deployment

After you deploy you need to tell the Sentry client (Raven) which release is the current release. There is an option called release that you pass when configuring it:

Raven.config({
    release: 'YOUR-RELEASE-STRING-HERE'
});

Thanks

• Thanks to @MikaAK for creating s3-webpack-plugin, which inspired much of this project
• Thanks to @danharper for creating the original build script implementation

Contributing

Contributions are welcome 😄. To run the tests, please ensure you have the relevant environment variables set up. You can cp .env.example .env and fill it in with test account credentials. An API key can be created here, assuming you are signed in.

Commands to be aware of

Warning ⚠️: The test suite will create releases & upload files. They should be cleaned up afterward, but ensure that you are not overwriting something important!

• npm start: List available commands (in green at bottom)
• npm test: Runs the test suite
• npm start lint: Runs linting
• npm start format: Formats code with prettier-eslint