590e71e536
The pipenv tool was nice in theory, but in practice it's just too hard
to update selectively, and it makes using it a pain. The qemu.qmp repo
dropped pipenv support a while back and it's been functioning just fine,
so I'm backporting that change here to qemu.git.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20230210003147.1309376-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
(cherry picked from commit 6832189fd7)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(Mjt: the reason for this is to stop CI failing in pipenv for 7.2)
85 lines
3.6 KiB
ReStructuredText
85 lines
3.6 KiB
ReStructuredText
QEMU Python Tooling
|
|
===================
|
|
|
|
This directory houses Python tooling used by the QEMU project to build,
|
|
configure, and test QEMU. It is organized by namespace (``qemu``), and
|
|
then by package (e.g. ``qemu/machine``, ``qemu/qmp``, etc).
|
|
|
|
``setup.py`` is used by ``pip`` to install this tooling to the current
|
|
environment. ``setup.cfg`` provides the packaging configuration used by
|
|
``setup.py``. You will generally invoke it by doing one of the following:
|
|
|
|
1. ``pip3 install .`` will install these packages to your current
|
|
environment. If you are inside a virtual environment, they will
|
|
install there. If you are not, it will attempt to install to the
|
|
global environment, which is **not recommended**.
|
|
|
|
2. ``pip3 install --user .`` will install these packages to your user's
|
|
local python packages. If you are inside of a virtual environment,
|
|
this will fail; you want the first invocation above.
|
|
|
|
If you append the ``--editable`` or ``-e`` argument to either invocation
|
|
above, pip will install in "editable" mode. This installs the package as
|
|
a forwarder ("qemu.egg-link") that points to the source tree. In so
|
|
doing, the installed package always reflects the latest version in your
|
|
source tree.
|
|
|
|
Installing ".[devel]" instead of "." will additionally pull in required
|
|
packages for testing this package. They are not runtime requirements,
|
|
and are not needed to simply use these libraries.
|
|
|
|
Running ``make develop`` will pull in all testing dependencies and
|
|
install QEMU in editable mode to the current environment.
|
|
(It is a shortcut for ``pip3 install -e .[devel]``.)
|
|
|
|
See `Installing packages using pip and virtual environments
|
|
<https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/>`_
|
|
for more information.
|
|
|
|
|
|
Using these packages without installing them
|
|
--------------------------------------------
|
|
|
|
These packages may be used without installing them first, by using one
|
|
of two tricks:
|
|
|
|
1. Set your PYTHONPATH environment variable to include this source
|
|
directory, e.g. ``~/src/qemu/python``. See
|
|
https://docs.python.org/3/using/cmdline.html#envvar-PYTHONPATH
|
|
|
|
2. Inside a Python script, use ``sys.path`` to forcibly include a search
|
|
path prior to importing the ``qemu`` namespace. See
|
|
https://docs.python.org/3/library/sys.html#sys.path
|
|
|
|
A strong downside to both approaches is that they generally interfere
|
|
with static analysis tools being able to locate and analyze the code
|
|
being imported.
|
|
|
|
Package installation also normally provides executable console scripts,
|
|
so that tools like ``qmp-shell`` are always available via $PATH. To
|
|
invoke them without installation, you can invoke e.g.:
|
|
|
|
``> PYTHONPATH=~/src/qemu/python python3 -m qemu.qmp.qmp_shell``
|
|
|
|
The mappings between console script name and python module path can be
|
|
found in ``setup.cfg``.
|
|
|
|
|
|
Files in this directory
|
|
-----------------------
|
|
|
|
- ``qemu/`` Python 'qemu' namespace package source directory.
|
|
- ``tests/`` Python package tests directory.
|
|
- ``avocado.cfg`` Configuration for the Avocado test-runner.
|
|
Used by ``make check`` et al.
|
|
- ``Makefile`` provides some common testing/installation invocations.
|
|
Try ``make help`` to see available targets.
|
|
- ``MANIFEST.in`` is read by python setuptools, it specifies additional files
|
|
that should be included by a source distribution.
|
|
- ``PACKAGE.rst`` is used as the README file that is visible on PyPI.org.
|
|
- ``README.rst`` you are here!
|
|
- ``VERSION`` contains the PEP-440 compliant version used to describe
|
|
this package; it is referenced by ``setup.cfg``.
|
|
- ``setup.cfg`` houses setuptools package configuration.
|
|
- ``setup.py`` is the setuptools installer used by pip; See above.
|