# Documentation architecture

The documentation relies on Sphinx and many Sphinx extensions.

The documentation code is in two main directories:

- {searchfox}`docs`
- {searchfox}`tools/moztreedocs`

Our documentation supports both rst & markdown syntaxes.

## Configuration

The main configuration file is:

{searchfox}`docs/config.yml`

It contains the categories, the redirects, the warnings and others configuration aspects.

The dependencies are listed in:

{searchfox}`tools/moztreedocs/requirements.in`

Be aware that Python libraries stored in `third_party/python` are used in priority (not always for good reasons). See {ref}`Vendor the source of the Python package in-tree <python-vendor>` for more details.

## Architecture

{searchfox}`mach_commands <tools/moztreedocs/mach_commands.py>`
contains:

- `mach doc` arguments managements
- Detection/configuration of the environment (nodejs for jsdoc, pip for dependencies, etc)
- Symlink the doc sources (.rst & .md) from the source tree into the staging directory
- Fails the build if any critical warnings have been identified
- Starts the sphinx build (and serve it if the option is set)
- Manages telemetry

{searchfox}`docs/conf.py` defines:

- The list of extensions
- JS source paths
- Various sphinx configuration

At the end of the build documentation process, files will be uploaded to a CDN:

{searchfox}`tools/moztreedocs/upload.py`