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charset="utf-8" It is no longer simply possible to just use this directory as if it were an installed package now that it has dependencies, so update the README to reflect this. Signed-off-by: John Snow --- python/README.rst | 50 ++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 43 insertions(+), 7 deletions(-) diff --git a/python/README.rst b/python/README.rst index d62e71528d2..2accfd7760e 100644 --- a/python/README.rst +++ b/python/README.rst @@ -3,7 +3,17 @@ QEMU Python Tooling =20 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). +then by package (e.g. ``qemu/machine``, ``qemu/utils``, etc). + +These tools and libraries are installed to the QEMU configure-time +Python virtual environment by default (see qemu.git/pythondeps.toml +"tooling" group), and are available for use by any Python script +executed by the build system. To have these libraries available for +manual invocations of scripts, use of the "run" script executable in +your build directory is recommended. + +General structure +----------------- =20 ``setup.py`` is used by ``pip`` to install this tooling to the current environment. ``setup.cfg`` provides the packaging configuration used by @@ -20,9 +30,9 @@ environment. ``setup.cfg`` provides the packaging configu= ration used by =20 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. +a forwarder that points to the source tree. In so doing, the installed +package always reflects the latest version in your source tree. This is +the mode used to install these packages at configure time. =20 Installing ".[devel]" instead of "." will additionally pull in required packages for testing this package. They are not runtime requirements, @@ -40,8 +50,18 @@ for more information. Using these packages without installing them -------------------------------------------- =20 -These packages may be used without installing them first, by using one -of two tricks: +It is no longer recommended to try to use these packages without +installing them to a virtual environment, but depending on your use +case, it may still be possible to do. + +The "qemu.qmp" library is now hosted outside of the qemu.git repository, +and the "qemu.machine" library that remains in-tree here has qemu.qmp as +a dependency. It is possible to install "qemu.qmp" independently and +then use the rest of these packages without installing them, but be +advised that if future dependencies are introduced, bypassing the +installation phase may introduce breakages to your script in the future. + +That said, you can use these packages without installing them by either: =20 1. Set your PYTHONPATH environment variable to include this source directory, e.g. ``~/src/qemu/python``. See @@ -61,8 +81,24 @@ invoke them without installation, you can invoke e.g.: =20 ``> PYTHONPATH=3D~/src/qemu/python python3 -m qemu.qmp.qmp_shell`` =20 +Or, with the runscript available in the QEMU build directory, simply: + +``> $builddir/run qmp-shell`` + The mappings between console script name and python module path can be -found in ``setup.cfg``. +found in ``setup.cfg``, but the console scripts available are listed +here for reference: + +* ``qemu-ga-client`` +* ``qmp-shell`` +* ``qmp-shell-wrap`` +* ``qmp-tui`` (prototype urwid interface for async QMP) +* ``qom`` +* ``qom-fuse`` (requires fusepy to be installed!) +* ``qom-get`` +* ``qom-list`` +* ``qom-set`` +* ``qom-tree`` =20 =20 Files in this directory --=20 2.52.0