Hacking on Pyramid
|
==================
|
|
Here are some guidelines for hacking on Pyramid.
|
|
|
Using a Development Checkout
|
----------------------------
|
|
You will have to create a development environment to hack on Pyramid, using a
|
Pyramid checkout. We use `tox` to run tests, run test coverage, and build
|
documentation.
|
|
tox docs: https://tox.readthedocs.io/en/latest/
|
tox on PyPI: https://pypi.org/project/tox/
|
|
- Create a new directory somewhere and `cd` to it:
|
|
$ mkdir ~/hack-on-pyramid
|
$ cd ~/hack-on-pyramid
|
|
- Check out a read-only copy of the Pyramid source:
|
|
$ git clone git://github.com/Pylons/pyramid.git .
|
|
Alternatively, create a writeable fork on GitHub and clone it.
|
|
|
Adding Features
|
---------------
|
|
In order to add a feature to Pyramid:
|
|
- The feature must be documented in both the API and narrative documentation
|
(in `docs/`).
|
|
- The feature must work fully on the following CPython versions: 2.7, 3.4, 3.5,
|
3.6, and 3.7 on both UNIX and Windows.
|
|
- The feature must work on the latest version of PyPy.
|
|
- The feature must not depend on any particular persistence layer (filesystem,
|
SQL, etc).
|
|
- The feature must not add unnecessary dependencies (where "unnecessary" is of
|
course subjective, but new dependencies should be discussed).
|
|
The above requirements are relaxed for scaffolding dependencies. If a scaffold
|
has an install-time dependency on something that doesn't work on a particular
|
platform, that caveat should be spelled out clearly in *its* documentation
|
(within its `docs/` directory).
|
|
|
Coding Style
|
------------
|
|
- Pyramid uses Black for code formatting style.
|
https://pypi.org/project/black/
|
To run Black:
|
|
$ tox -e black
|
|
|
Running Tests
|
-------------
|
|
- The `tox.ini` uses `nose` and `coverage`. As such `tox` may be used
|
to run groups of tests or only a specific version of Python. For example, the
|
following command will run tests on Python 3.7 only without coverage:
|
|
$ tox -e py37
|
|
This command will run tests on the latest versions of Python 2 and 3 with
|
coverage totaled for both versions.
|
|
$ tox -e py2-cover,py3-cover,coverage
|
|
- To run individual tests (i.e., during development), you can use `nosetests`
|
syntax as follows, where `$VENV` is an environment variable set to the path
|
to your virtual environment:
|
|
# run a single test
|
$ $VENV/bin/nosetests pyramid.tests.test_module:ClassName.test_mytestname
|
|
# run all tests in a class
|
$ $VENV/bin/nosetests pyramid.tests.test_module:ClassName
|
|
Optionally you can install a nose plugin `nose-selecttests` to run specific
|
tests.
|
https://pypi.org/project/nose-selecttests/
|
For example, use a regular expression with the `-t` parameter to run tests.
|
|
# run a single test
|
$ $VENV/bin/nosetests -t test_mytestname
|
|
- The tests can also be run using `pytest`.
|
https://docs.pytest.org/en/latest/
|
This is intended as a convenience for people who prefer `pytest`. Run the
|
tests like so:
|
|
$ $VENV/bin/pip install pytest
|
$ $VENV/bin/pytest --strict pyramid/
|
|
To run individual tests (i.e., during development), see "pytest usage -
|
Specifying tests / selecting tests":
|
https://docs.pytest.org/en/latest/usage.html#specifying-tests-selecting-tests
|
|
- Functional tests related to the "scaffolds" (starter, zodb, alchemy) which
|
create a virtual environment, install the scaffold package and its
|
dependencies, start a server, and hit a URL on the server, can be run like
|
so:
|
|
$ tox -e{py27,py34,py35,py36,py37,pypy}-scaffolds
|
|
|
Test Coverage
|
-------------
|
|
- The codebase *must* have 100% test statement coverage after each commit. You
|
can test coverage via `tox -epy2-cover,py3-cover,coverage`.
|
|
|
Documentation Coverage and Building HTML Documentation
|
------------------------------------------------------
|
|
If you fix a bug, and the bug requires an API or behavior modification, all
|
documentation in this package which references that API or behavior must be
|
changed to reflect the bug fix, ideally in the same commit that fixes the bug
|
or adds the feature. To build and review docs, use the following steps.
|
|
1. In the main Pyramid checkout directory, run `tox -e docs`:
|
|
$ tox -e docs
|
|
2. Open the `docs/_build/html/index.html` file to see the resulting HTML
|
rendering.
|
|
|
Change Log
|
----------
|
|
- Feature additions and bugfixes must be added to the `CHANGES.rst`
|
file in the prevailing style. Changelog entries should be long and
|
descriptive, not cryptic. Other developers should be able to know
|
what your changelog entry means.
|