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Directory structure

This page documents the Zulip directory structure, where to find things, and how to decide where to put a file.

You may also find the new application feature tutorial helpful for understanding the flow through these files.

Core Python files

Zulip uses the Django web framework, so a lot of these paths will be familiar to Django developers.

zproject/urls.py Main Django routes file. Defines which URLs are handled by which view functions or templates.
zerver/models.py Main Django models file. Defines Zulip's database tables.
zerver/lib/*.py Most library code.
zerver/lib/actions.py Most code doing writes to user-facing database tables lives here. In particular, we have a policy that all code calling send_event to trigger pushing data to clients must live here.
zerver/views/*.py Most Django views.
zerver/webhooks/ Webhook views and tests for Zulip's incoming webhook integrations.
zerver/tornado/views.py Tornado views.
zerver/worker/queue_processors.py Queue workers.
zerver/lib/markdown/ Backend Markdown processor.
zproject/backends.py Authentication backends.

HTML templates

See our docs for details on Zulip's templating systems.

templates/zerver/ For Jinja2 templates for the backend (for zerver app; logged-in content is in templates/zerver/app).
static/templates/ Handlebars templates for the frontend.

JavaScript, TypeScript, and other static assets

static/js/ Zulip's own JavaScript and TypeScript sources.
static/styles/ Zulip's own CSS.
static/images/ Zulip's images.
static/third/ Third-party JavaScript and CSS that has been vendored.
node_modules/ Third-party JavaScript installed via yarn.
static/assets/ For assets not to be served to the web (e.g. the system to generate our favicons).

Tests

zerver/tests/ Backend tests.
frontend_tests/node_tests/ Node Frontend unit tests.
frontend_tests/puppeteer_tests/ Puppeteer frontend integration tests.
tools/test-* Developer-facing test runner scripts.

Management commands

These are distinguished from scripts, below, by needing to run a Django context (i.e. with database access).

zerver/management/commands/ Management commands one might run at a production deployment site (e.g. scripts to change a value or deactivate a user properly).
zilencer/management/commands/ includes some dev-specific commands such as populate_db, which are not included in the production distribution.

Scripts

scripts/ Scripts that production deployments might run manually (e.g., restart-server).
scripts/lib/ Scripts that are needed on production deployments but humans should never run directly.
scripts/setup/ Scripts that production deployments will only run once, during installation.
tools/ Scripts used only in a Zulip development environment. These are not included in production release tarballs for Zulip, so that we can include scripts here one wouldn't want someone to run in production accidentally (e.g. things that delete the Zulip database without prompting).
tools/setup/ Subdirectory of tools/ for things only used during the development environment setup process.
tools/ci/ Subdirectory of tools/ for things only used to set up and run our tests in CI. Actual test suites should go in tools/.

API and bots

See the Zulip API repository. Zulip's Python API bindings, a number of Zulip integrations and bots, and a framework for running and testing Zulip bots, used to be developed in the main Zulip server repo but are now in their own repo.
templates/zerver/integrations/ (within templates/zerver/, above). Documentation for these integrations.

Production puppet configuration

This is used to deploy essentially all configuration in production.

puppet/zulip/ For configuration for production deployments.
puppet/zulip/manifests/voyager.pp Main manifest for Zulip standalone deployments.

Additional Django apps

confirmation Email confirmation system.
analytics Analytics for the Zulip server administrator (needs work to be useful to normal Zulip sites).
corporate The old Zulip.com website. Not included in production distribution.
zilencer Primarily used to hold management commands that aren't used in production. Not included in production distribution.

Jinja2 compatibility files

zproject/jinja2/__init__.py Jinja2 environment.

Translation files

locale/ Backend (Django) and frontend translation data files.

Documentation

docs/ Source for this documentation.

You can consult the repository's .gitattributes file to see exactly which components are excluded from production releases (release tarballs are generated using tools/build-release-tarball).

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