qemu/python/tests, branch master

Python: Drop support for Python 3.7

2023-09-07T11:32:37Z

Debian 10 is not anymore a supported distro, since Debian 12 was released on June 10, 2023. Our supported build platforms as of today all support at least 3.8 (and all of them except for Ubuntu 20.04 support 3.9): openSUSE Leap 15.5: 3.6.15 (3.11.2) CentOS Stream 8: 3.6.8 (3.8.13, 3.9.16, 3.11.4) CentOS Stream 9: 3.9.17 (3.11.4) Fedora 37: 3.11.4 Fedora 38: 3.11.4 Debian 11: 3.9.2 Debian 12: 3.11.2 Alpine 3.14, 3.15: 3.9.16 Alpine 3.16, 3.17: 3.10.10 Ubuntu 20.04 LTS: 3.8.10 Ubuntu 22.04 LTS: 3.10.12 NetBSD 9.3: 3.9.13* FreeBSD 12.4: 3.9.16 FreeBSD 13.1: 3.9.18 OpenBSD 7.2: 3.9.17 Note: NetBSD does not appear to have a default meta-package, but offers several options, the lowest of which is 3.7.15. However, "python39" appears to be a pre-requisite to one of the other packages we request in tests/vm/netbsd. Since it is safe under our supported platform policy, bump our minimum supported version of Python to 3.8. The two most interesting features to have by default include: - the importlib.metadata module, whose lack is responsible for over 100 lines of code in mkvenv.py - improvements to asyncio, for example asyncio.CancelledError inherits from BaseException rather than Exception In addition, code can now use the assignment operator ':=' Because mypy now learns about importlib.metadata, a small change to mkvenv.py is needed to pass type checking. Signed-off-by: Paolo Bonzini

python: bump minimum requirements so they are compatible with 3.12

2023-07-07T10:49:22Z

There are many Python 3.12 issues right now, but a particularly problematic one when debugging them is that one cannot even use minreqs.txt in a Python 3.12 virtual environment to test with locked package versions. Bump the mypy and wrapt versions to fix this, while remaining within the realm of versions compatible with Python 3.7. This requires a workaround for a mypy false positive qemu/qmp/qmp_tui.py:350: error: Non-overlapping equality check (left operand type: "Literal[Runstate.DISCONNECTING]", right operand type: "Literal[Runstate.IDLE]") [comparison-overlap] where mypy does not realize that self.disconnect() could change the value of self.runstate. Signed-off-by: Paolo Bonzini

python: bump some of the dependencies

2023-05-18T06:53:51Z

The version of pyflakes that is listed in python/tests/minreqs.txt breaks on Python 3.8 with the following message: AttributeError: 'FlakesChecker' object has no attribute 'CONSTANT' Now that we do not support EOL'd Python versions anymore, we can update to newer, fixed versions. It is a good time to do so, before Python packages start dropping support for Python 3.7 as well! The new mypy is also a bit smarter about which packages are actually being used, so remove the now-unnecessary sections from setup.cfg. Signed-off-by: Paolo Bonzini Signed-off-by: John Snow Message-Id: <20230511035435.734312-27-jsnow@redhat.com> Signed-off-by: Paolo Bonzini

Python: Drop support for Python 3.6

2023-05-18T06:53:51Z

Python 3.6 was EOL 2021-12-31. Newer versions of upstream libraries have begun dropping support for this version and it is becoming more cumbersome to support. Avocado-framework and qemu.qmp each have their own reasons for wanting to drop Python 3.6, but won't until QEMU does. Versions of Python available in our supported build platforms as of today, with optional versions available in parentheses: openSUSE Leap 15.4: 3.6.15 (3.9.10, 3.10.2) CentOS Stream 8: 3.6.8 (3.8.13, 3.9.16) CentOS Stream 9: 3.9.13 Fedora 36: 3.10 Fedora 37: 3.11 Debian 11: 3.9.2 Alpine 3.14, 3.15: 3.9.16 Alpine 3.16, 3.17: 3.10.10 Ubuntu 20.04 LTS: 3.8.10 Ubuntu 22.04 LTS: 3.10.4 NetBSD 9.3: 3.9.13* FreeBSD 12.4: 3.9.16 FreeBSD 13.1: 3.9.16 OpenBSD 7.2: 3.9.16 Note: Our VM tests install 3.9 explicitly for FreeBSD and 3.10 for NetBSD; the default for "python" or "python3" in FreeBSD is 3.9.16. NetBSD does not appear to have a default meta-package, but offers several options, the lowest of which is 3.7.15. "python39" appears to be a pre-requisite to one of the other packages we request in tests/vm/netbsd. pip, ensurepip and other Python essentials are currently only available for Python 3.10 for NetBSD. CentOS and OpenSUSE support parallel installation of multiple Python interpreters, and binaries in /usr/bin will always use Python 3.6. However, the newly introduced support for virtual environments ensures that all build steps that execute QEMU Python code use a single interpreter. Since it is safe to under our supported platform policy, bump our minimum supported version of Python to 3.7. Signed-off-by: John Snow Reviewed-by: Daniel P. Berrangé Signed-off-by: Paolo Bonzini Message-Id: <20230511035435.734312-24-jsnow@redhat.com> Signed-off-by: Paolo Bonzini

mkvenv: add ensure subcommand

2023-05-18T06:53:51Z

This command is to be used to add various packages (or ensure they're already present) into the configure-provided venv in a modular fashion. Examples: mkvenv ensure --online --dir "${source_dir}/python/wheels/" "meson>=0.61.5" mkvenv ensure --online "sphinx>=1.6.0" mkvenv ensure "qemu.qmp==0.0.2" It's designed to look for packages in three places, in order: (1) In system packages, if the version installed is already good enough. This way your distribution-provided meson, sphinx, etc are always used as first preference. (2) In a vendored packages directory. Here I am suggesting qemu.git/python/wheels/ as that directory. This is intended to serve as a replacement for vendoring the meson source for QEMU tarballs. It is also highly likely to be extremely useful for packaging the "qemu.qmp" package in source distributions for platforms that do not yet package qemu.qmp separately. (3) Online, via PyPI, ***only when "--online" is passed***. This is only ever used as a fallback if the first two sources do not have an appropriate package that meets the requirement. The ability to build QEMU and run tests *completely offline* is not impinged. Signed-off-by: Paolo Bonzini Signed-off-by: John Snow Message-Id: <20230511035435.734312-7-jsnow@redhat.com> [Use distlib to lookup distributions. - Paolo] Signed-off-by: Paolo Bonzini

python: add mkvenv.py

2023-05-18T06:53:51Z

This script will be responsible for building a lightweight Python virtual environment at configure time. It works with Python 3.6 or newer. It has been designed to: - work *offline*, no PyPI required. - work *quickly*, The fast path is only ~65ms on my machine. - work *robustly*, with multiple fallbacks to keep things working. - work *cooperatively*, using system packages where possible. (You can use your distro's meson, no problem.) Due to its unique position in the build chain, it exists outside of the installable python packages in-tree and *must* be runnable without any third party dependencies. Under normal circumstances, the only dependency required to execute this script is Python 3.6+ itself. The script is *faster* by several seconds when setuptools and pip are installed in the host environment, which is probably the case for a typical multi-purpose developer workstation. In the event that pip/setuptools are missing or not usable, additional dependencies may be required on some distributions which remove certain Python stdlib modules to package them separately: - Debian may require python3-venv to provide "ensurepip" - NetBSD may require py310-expat to provide "pyexpat" * (* Or whichever version is current for NetBSD.) Signed-off-by: Paolo Bonzini Signed-off-by: John Snow Message-Id: <20230511035435.734312-4-jsnow@redhat.com> Signed-off-by: Paolo Bonzini

python: drop pipenv

2023-02-23T04:35:03Z

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 Message-id: 20230210003147.1309376-3-jsnow@redhat.com Signed-off-by: John Snow

python: rename qemu.aqmp to qemu.qmp

2022-04-21T15:01:00Z

Now that we are fully switched over to the new QMP library, move it back over the old namespace. This is being done primarily so that we may upload this package simply as "qemu.qmp" without introducing confusion over whether or not "aqmp" is a new protocol or not. The trade-off is increased confusion inside the QEMU developer tree. Sorry! Note: the 'private' member "_aqmp" in legacy.py also changes to "_qmp"; not out of necessity, but just to remove any traces of the "aqmp" name. Signed-off-by: John Snow Reviewed-by: Beraldo Leal Acked-by: Hanna Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy Message-id: 20220330172812.3427355-8-jsnow@redhat.com Signed-off-by: John Snow

python/aqmp: add start_server() and accept() methods

2022-03-07T19:36:41Z

Add start_server() and accept() methods that can be used instead of start_server_and_accept() to allow more fine-grained control over the incoming connection process. (Eagle-eyed reviewers will surely notice that it's a bit weird that "CONNECTING" is a state that's shared between both the start_server() and connect() states. That's absolutely true, and it's very true that checking on the presence of _accepted as an indicator of state is a hack. That's also very certainly true. But ... this keeps client code an awful lot simpler, as it doesn't have to care exactly *how* the connection is being made, just that it *is*. Is it worth disrupting that simplicity in order to provide a better state guard on `accept()`? Hm.) Signed-off-by: John Snow Acked-by: Kevin Wolf Reviewed-by: Daniel P. Berrangé Message-id: 20220225205948.3693480-9-jsnow@redhat.com Signed-off-by: John Snow

python/aqmp: refactor _do_accept() into two distinct steps

2022-03-07T19:36:41Z

Refactor _do_accept() into _do_start_server() and _do_accept(). As of this commit, the former calls the latter, but in subsequent commits they'll be split apart. (So please forgive the misnomer for _do_start_server(); it will live up to its name shortly, and the docstring will be updated then too. I'm just cutting down on some churn.) Signed-off-by: John Snow Acked-by: Kevin Wolf Reviewed-by: Daniel P. Berrangé Message-id: 20220225205948.3693480-7-jsnow@redhat.com Signed-off-by: John Snow