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Contribute to Chainlit

To contribute to Chainlit, you first need to setup the project on your local machine.

Table of Contents

Local setup

Requirements

  1. Python >= 3.8
  2. Poetry (See how to install)
  3. NodeJS >= 16 (See how to install)
  4. Pnpm (See how to install)

Note If you are on windows, some pnpm commands like pnpm run formatPython won't work. You can fix this by changing the pnpm script-shell to bash: pnpm config set script-shell "C:\\Program Files\\git\\bin\\bash.exe" (default x64 install location, Info)

Setup the repo

With this setup you can easily code in your fork and fetch updates from the main repository.

  1. Go to https://github.com/Chainlit/chainlit/fork to fork the chainlit code into your own repository.
  2. Clone your fork locally
$ git clone https://github.com/YOUR_USERNAME/YOUR_FORK.git
  1. Go into your fork and list the current configured remote repository.
$ git remote -v
> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
> origin  https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)
  1. Specify the new remote upstream repository that will be synced with the fork.
$ git remote add upstream https://github.com/Chainlit/chainlit.git
  1. Verify the new upstream repository you've specified for your fork.
$ git remote -v
> origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (fetch)
> origin    https://github.com/YOUR_USERNAME/YOUR_FORK.git (push)
> upstream  https://github.com/Chainlit/chainlit.git (fetch)
> upstream  https://github.com/Chainlit/chainlit.git (push)

Install JS dependencies

pnpm install

Install python dependencies

cd src
poetry install --with tests --with mypy

Make sure you have the Python code formatters black and isort installed as they are used in a pre-commit hook. Run pip install black isort if needed.

Start the Chainlit server from source

You need to build the UI once before starting the server.

pnpm run buildUi

Start by running src/chainlit/hello.py as an example.

cd src
poetry run chainlit run chainlit/hello.py

You should now be able to access the Chainlit app you just launched on http://127.0.0.1:8000.

If you've made it this far, you can now replace chainlit/hello.py by your own target. 😎

Start the UI from source

First, you will have to start the server either from source or with chainlit run... . Since we are starting the UI from source, you can start the server with the -h (headless) option.

Then, start the UI.

cd src/chainlit/frontend
pnpm run dev --port 5174

If you visit http://127.0.0.1:5174/, it should connect to your local server. If the local server is not running, it should say that it can't connect to the server.

Run the tests

Run pnpm test

Once you create a pull request, the tests will automatically run. It is a good practice to run the tests locally before pushing.

Run one test

  1. Find the folder containing the e2e test that you're looking for in cypress/e2e.
  2. Run SINGLE_TEST=FOLDER pnpm test and change FOLDER with the folder from the previous step (example: SINGLE_TEST=scoped_elements run test).

You can optionally skip the build phase when running a test by adding SKIP_BUILD=true.