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Slack Cutter

Slack Cutter cuts you some slack!

Slack Cutter is an intermediary API to communicate with Slack. You can create custom Slack slash commands, incoming hooks, bots, cron jobs (soon)...

Written in ES6/2015 with transpiling to ES5 via Babel


Right now we have the following slash commands:

  • Extension Number: Lookup your colleague's extension number. Eg:
    • /ext John: searches for John's extension number
    • /ext: List all available extension numbers
  • Continuous Integration server: Trigger builds in your CI server. Eg:
    • /ci build my-product
    • /ci release my-product 1.2.3-alpha
    • /ci deploy my-product 1.2.3-alpha
  • Pull Requests: List a project Pull Requests from GitHub in a particular channel to facilitate code review and prioritization. Eg:
    • /prs my-product
  • Any new API should be fairly easy to add. Just create a new route.



General Configuration

.env file

The configuration variables are set via environment variables and/or using the .env file (environment variable has precedence over .env file).

Just copy the example.env as .env and modify it as needed.

The GitHub credentials are only needed if you're planning to use the /prs commands.

Important: if you're going to use a .env file AND are using Docker, edit it before you build the Dockerfile.

Slash Commands

Every slash commands takes a .json with private data. See the README in each command's directory to learn how to configure and use them. Basically, you'll have to copy the config.example.json to config.json and edit them to your needs ;-).


You can install it in your own local infrastructure or in a cloud service like heroku. Alternatively, you can build a Docker image and deploy as container

  1. Set up a server address in your local infrastructure that will serve this application (eg: or
  2. Clone/download this repo to your chosen server
  3. Configure your application according to the "Configuration" section above

Via pure NodeJS + npm

  1. Install NodeJS if you don't have it already
  2. Run npm install in the app's root folder

Important note: make sure you don't have any firewall blocking the incoming TCP port (default is PORT 5000 as defined in the "Configuration" section above)

Via Docker

  1. Build the Docker image: npm run container:build

Note: In Linux the <dockerhost> is localhost, within OSX's Boot2docker, use the IP reported by the command: boot2docker ip


Via pure node or npm

  1. Run npm start to fire up the application

Via Docker

  1. Run the container: 1. If you used the .env file: npm run container:run 2. Without .env file:

    docker run -e PORT=5000 -e SLACK_TOKEN=123123 -e SLACK_DOMAIN=company -e SLACK_CHANNEL=channel -p 5000:5000 -d slack-cutter
  2. Ensure the container is running (you should also be able to access the service using web browser: http://<dockerhost>:5000/).

You can run npm run | grep container: to see other available container actions.




Cutting some Slack for you :)




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