Action Destinations

Action Destinations are a way to build streaming destinations on Segment. To begin, follow the instructions in Get Started below.

Fore more detailed instruction, see the following READMEs:

• Create a Destination Action
• Troubleshooting

Get started

Local development

This is a monorepo with multiple packages leveraging lerna with Yarn Workspaces:

• packages/ajv-human-errors - a wrapper around AJV errors to produce more friendly validation messages
• packages/browser-destinations - destination definitions that run on device via Analytics 2.0
• packages/cli - a set of command line tools for interacting with the repo
• packages/core - the core runtime engine for actions, including mapping-kit transforms
• packages/destinations-actions - destination definitions and their actions
• packages/destinations-subscriptions - validates events against an action's subscription AST

Getting set up

You'll need to have some tools installed locally to build and test action destinations.

• Yarn 1.x
• Node 14.17 (latest LTS, we recommand using nvm for managing Node versions)

If you are a Segment employee you can directly git clone the repository locally. Otherwise you'll want to fork this repository for your organization to submit Pull Requests against the main Segment repository. Once you've got a fork, you can git clone that locally.

# Clone the repo locally
git clone <your fork or https://github.com/segmentio/action-destinations.git>
cd action-destinations

npm login
yarn login

# Requires node 14.17, optionally: nvm use 14.17
yarn --ignore-optional
yarn bootstrap

# Run unit tests to ensure things are working! All tests should pass :)
yarn test

Actions CLI

In order to run the CLI (./bin/run), your current working directory needs to be the root of the action-destinations repository.

# see what's supported by the CLI
./bin/run --help

# scaffold a new destination
./bin/run init

# scaffold a new action within a destination
./bin/run generate:action <ACTION_NAME> <browser|server>

# generates TypeScript definitions for an integration
./bin/run generate:types

# start local development server
./bin/run serve

For specific information about each CLI command, please refer to this README.

Troubleshooting CLI

If a CLI command fails to work properly, run the command with DEBUG=* at the beginning (e.g. DEBUG=* ./bin/run serve). This will produce a verbose debugging output, providing hints as to why something isn't working as expected. All of the CLI commands are also in the ./packages/cli/src/commands directory if you need to inspect them further.

Testing

Refer here for more information about testing your destination actions.

Debugging

Pass the Node flag --inspect when you run the local server, and then you can attach a debugger from your IDE. The serve command will pass any extra args/flags to the underlying Node process.

Configuring

Action destinations are configured using a single Destination setting (subscriptions) that should contain a JSON blob of all subscriptions for the destination. The format should look like this:

[
  {
    "subscribe": "<fql query>",
    "partnerAction": "<actionSlug>",

    // See ./packages/core/src/mapping-kit/README.md for documentation. The keys in this object should match the `action.fields`
    "mapping": { ... }
  }
]

Here's a full example:

[
  {
    "subscribe": "type = 'track'",
    "partnerAction": "postToChannel",
    "mapping": {
      "text": {
        "@template": "Tracked! event={{event}}, {{properties.text}}"
      },
      "url": "https://hooks.slack.com/services/0HL7TC62R/0T276CRHL/8WvI6gEiE9ZqD47kWqYbfIhZ",
      "channel": "test-channel"
    }
  },
  {
    "subscribe": "type = 'identify'",
    "partnerAction": "postToChannel",
    "mapping": {
      "text": {
        "@template": "User identified! email={{email}}"
      },
      "url": "https://hooks.slack.com/services/0HL7TC62R/0T276CRHL/8WvI6gEiE9ZqD47kWqYbfIhZ",
      "channel": "test-channel"
    }
  }
]

License

MIT License

Copyright (c) 2021 Segment

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Contributing

All third party contributors acknowledge that any contributions they provide will be made under the same open source license that the open source project is provided under.