mirror of
https://mau.dev/maunium/synapse.git
synced 2024-11-12 04:52:26 +01:00
116 lines
3.3 KiB
ReStructuredText
116 lines
3.3 KiB
ReStructuredText
# Code Style
|
|
|
|
The Synapse codebase uses a number of code formatting tools in order to
|
|
quickly and automatically check for formatting (and sometimes logical) errors
|
|
in code.
|
|
|
|
The necessary tools are detailed below.
|
|
|
|
## Formatting tools
|
|
|
|
The Synapse codebase uses [black](https://pypi.org/project/black/) as an
|
|
opinionated code formatter, ensuring all comitted code is properly
|
|
formatted.
|
|
|
|
First install ``black`` with::
|
|
|
|
pip install --upgrade black
|
|
|
|
Have ``black`` auto-format your code (it shouldn't change any
|
|
functionality) with::
|
|
|
|
black . --exclude="\.tox|build|env"
|
|
|
|
- **flake8**
|
|
|
|
``flake8`` is a code checking tool. We require code to pass ``flake8`` before being merged into the codebase.
|
|
|
|
Install ``flake8`` with::
|
|
|
|
pip install --upgrade flake8
|
|
|
|
Check all application and test code with::
|
|
|
|
flake8 synapse tests
|
|
|
|
- **isort**
|
|
|
|
``isort`` ensures imports are nicely formatted, and can suggest and
|
|
auto-fix issues such as double-importing.
|
|
|
|
Install ``isort`` with::
|
|
|
|
pip install --upgrade isort
|
|
|
|
Auto-fix imports with::
|
|
|
|
isort -rc synapse tests
|
|
|
|
``-rc`` means to recursively search the given directories.
|
|
|
|
It's worth noting that modern IDEs and text editors can run these tools
|
|
automatically on save. It may be worth looking into whether this
|
|
functionality is supported in your editor for a more convenient development
|
|
workflow. It is not, however, recommended to run ``flake8`` on save as it
|
|
takes a while and is very resource intensive.
|
|
|
|
## General rules
|
|
|
|
- **Naming**:
|
|
|
|
- Use camel case for class and type names
|
|
- Use underscores for functions and variables.
|
|
|
|
- Use double quotes ``"foo"`` rather than single quotes ``'foo'``.
|
|
|
|
- **Comments**: should follow the `google code style
|
|
<http://google.github.io/styleguide/pyguide.html?showone=Comments#Comments>`_.
|
|
This is so that we can generate documentation with `sphinx
|
|
<http://sphinxcontrib-napoleon.readthedocs.org/en/latest/>`_. See the
|
|
`examples
|
|
<http://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html>`_
|
|
in the sphinx documentation.
|
|
|
|
- **Imports**:
|
|
|
|
- Prefer to import classes and functions rather than packages or modules.
|
|
|
|
Example::
|
|
|
|
from synapse.types import UserID
|
|
...
|
|
user_id = UserID(local, server)
|
|
|
|
is preferred over::
|
|
|
|
from synapse import types
|
|
...
|
|
user_id = types.UserID(local, server)
|
|
|
|
(or any other variant).
|
|
|
|
This goes against the advice in the Google style guide, but it means that
|
|
errors in the name are caught early (at import time).
|
|
|
|
- Multiple imports from the same package can be combined onto one line::
|
|
|
|
from synapse.types import GroupID, RoomID, UserID
|
|
|
|
An effort should be made to keep the individual imports in alphabetical
|
|
order.
|
|
|
|
If the list becomes long, wrap it with parentheses and split it over
|
|
multiple lines.
|
|
|
|
- As per `PEP-8 <https://www.python.org/dev/peps/pep-0008/#imports>`_,
|
|
imports should be grouped in the following order, with a blank line between
|
|
each group:
|
|
|
|
1. standard library imports
|
|
2. related third party imports
|
|
3. local application/library specific imports
|
|
|
|
- Imports within each group should be sorted alphabetically by module name.
|
|
|
|
- Avoid wildcard imports (``from synapse.types import *``) and relative
|
|
imports (``from .types import UserID``).
|