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Setting up a Source Cred Development Enviornment

Technology Stack Overview

SourceCred is written on JavaScript powered by Flow and is built using Yarn. The Flow syntax is transpiled to JavaScript by Babel and bundled by Webpack and (e.g. for Flow-to-JavaScript transpiling).

SourceCred Server is implemented as NodeJS application using Express as a web framework. Front-end employs React.

Quality is assured by Jest unit tests.

Building SourceCred Locally

First, run the following commands to clone and build SourceCred:

git clone
cd sourcecred
yarn build

Visual Studio Code

Using of the appropriate IDE might speeds up development process and make it enjoyable. One possible choice is VS Code with Flow extension installed.

SourceCred Instance Setup and Usage

Next, run the following commands to clone the SourceCred Instance:

git clone
cd template-instance

Using this instance as a starting point, you can update the config to include the plugins you want, pointing at the data you care about. We recommend setting up your instance locally first and make sure its working before pushing your changes to master and using the Github Action.

  1. Get Yarn and then run yarn to install SourceCred and dependencies.

  2. Enable the plugins you want to use by updating the sourcecred.json file. e.g. to enable all the plugins:

"bundledPlugins": [
  1. If you are using the GitHub or Discord plugin, copy the .env.example file to a .env file:
cp .env.example .env
  1. Follow the steps in the plugin guides below to setup the config files and generate access tokens for each plugin and then paste them into the .env file after the = sign.

Using A Modified Backend

You'll likely want to test out your modified version of SourceCred on an instance you're familiar with.

A convenient way to do that is to create an alias for your altered version of SourceCred.

Here's an example of how to do so in a bash shell:

# While in the SourceCred directory reopsitory
alias scdev='node "$SC_REPOSITORY_DIR"/packages/sourcecred/bin/sourcecred.js'

# Then go back to the Template Instance directory, for example:
# Run the `sourcecred go` command, in your instance, using your modified code.
scdev go
  1. Initialize the configs a. change to be non-zero b. change to be ["sourcecred/discourse"]

  2. from your local template-instance clone, run scdev go

  3. run scdev serve go to the url it outputs.

Supported Plugins


The GitHub plugin loads GitHub repositories.

You can specify the repositories to load in config/plugins/sourcecred/github/config.json.

The Github Action automatically has its own GITHUB_TOKEN, but if you need to load data from the GitHub plugin locally, you must have a GitHub API key in your .env file as SOURCECRED_GITHUB_TOKEN=<token> (copy the .env.example file for reference). The key should be read-only without any special scopes or permissions (unless you are loading a private GitHub repository, in which case the key needs access to your private repositories).

You can generate a GitHub API key here.


The Discourse plugin loads Discourse forums; currently, only one forum can be loaded in any single instance. This does not require any special API keys or permissions. You just need to set the server url in config/plugins/sourcecred/discourse/config.json.


The Discord plugin loads Discord servers, and mints Cred on Discord reactions. In order for SourceCred to access your Discord server, you need to generate a "bot token" and paste it in the .env file as SOURCECRED_DISCORD_TOKEN=<token> (copy the .env.example file for reference). You will also need to add it to your GitHub Action secrets.

The full instructions for setting up the Discord plugin can be found in the Discord plugin page in the SourceCred documentation.

Removing plugins

Removing plugins

To deactivate a plugin, just remove it from the bundledPlugins array in the sourcecred.json file. You can also remove its config/plugins/OWNER/NAME directory for good measure.