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6f84d726f3
Well, Cleber was right, this is a better name. In preparation for adding a different kind of virtual environment check (One that simply uses whichever version of Python you happen to have), rename this test 'check-pipenv' so that it matches the CI job 'check-python-pipenv'. Remove the "If you don't know which test to run" hint, because it's not actually likely you have Python 3.6 installed to be able to run the test. It's still the test I'd most prefer you to run, but it's not the test you are most likely to be able to run. Rename the 'venv' target to 'pipenv' as well, and move the more pertinent help text under the 'check-pipenv' target. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Willian Rampazzo <willianr@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Message-id: 20210629214323.1329806-8-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
88 lines
3.8 KiB
ReStructuredText
88 lines
3.8 KiB
ReStructuredText
QEMU Python Tooling
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===================
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This directory houses Python tooling used by the QEMU project to build,
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configure, and test QEMU. It is organized by namespace (``qemu``), and
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then by package (e.g. ``qemu/machine``, ``qemu/qmp``, etc).
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``setup.py`` is used by ``pip`` to install this tooling to the current
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environment. ``setup.cfg`` provides the packaging configuration used by
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``setup.py``. You will generally invoke it by doing one of the following:
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1. ``pip3 install .`` will install these packages to your current
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environment. If you are inside a virtual environment, they will
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install there. If you are not, it will attempt to install to the
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global environment, which is **not recommended**.
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2. ``pip3 install --user .`` will install these packages to your user's
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local python packages. If you are inside of a virtual environment,
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this will fail; you want the first invocation above.
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If you append the ``--editable`` or ``-e`` argument to either invocation
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above, pip will install in "editable" mode. This installs the package as
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a forwarder ("qemu.egg-link") that points to the source tree. In so
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doing, the installed package always reflects the latest version in your
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source tree.
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Installing ".[devel]" instead of "." will additionally pull in required
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packages for testing this package. They are not runtime requirements,
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and are not needed to simply use these libraries.
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Running ``make develop`` will pull in all testing dependencies and
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install QEMU in editable mode to the current environment.
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(It is a shortcut for ``pip3 install -e .[devel]``.)
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See `Installing packages using pip and virtual environments
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<https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/>`_
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for more information.
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Using these packages without installing them
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--------------------------------------------
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These packages may be used without installing them first, by using one
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of two tricks:
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1. Set your PYTHONPATH environment variable to include this source
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directory, e.g. ``~/src/qemu/python``. See
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https://docs.python.org/3/using/cmdline.html#envvar-PYTHONPATH
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2. Inside a Python script, use ``sys.path`` to forcibly include a search
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path prior to importing the ``qemu`` namespace. See
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https://docs.python.org/3/library/sys.html#sys.path
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A strong downside to both approaches is that they generally interfere
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with static analysis tools being able to locate and analyze the code
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being imported.
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Package installation also normally provides executable console scripts,
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so that tools like ``qmp-shell`` are always available via $PATH. To
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invoke them without installation, you can invoke e.g.:
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``> PYTHONPATH=~/src/qemu/python python3 -m qemu.qmp.qmp_shell``
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The mappings between console script name and python module path can be
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found in ``setup.cfg``.
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Files in this directory
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-----------------------
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- ``qemu/`` Python 'qemu' namespace package source directory.
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- ``tests/`` Python package tests directory.
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- ``avocado.cfg`` Configuration for the Avocado test-runner.
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Used by ``make check`` et al.
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- ``Makefile`` provides some common testing/installation invocations.
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Try ``make help`` to see available targets.
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- ``MANIFEST.in`` is read by python setuptools, it specifies additional files
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that should be included by a source distribution.
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- ``PACKAGE.rst`` is used as the README file that is visible on PyPI.org.
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- ``Pipfile`` is used by Pipenv to generate ``Pipfile.lock``.
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- ``Pipfile.lock`` is a set of pinned package dependencies that this package
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is tested under in our CI suite. It is used by ``make check-pipenv``.
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- ``README.rst`` you are here!
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- ``VERSION`` contains the PEP-440 compliant version used to describe
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this package; it is referenced by ``setup.cfg``.
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- ``setup.cfg`` houses setuptools package configuration.
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- ``setup.py`` is the setuptools installer used by pip; See above.
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