Breaks on FreeBSD: No platform declared for host OS freebsd on arch amd64

[yurivict]

Project that uses python3_9 on FreeBSD fails:

DEBUG: /usr/ports/devel/py-ray/work-py311/ray-ray-2.44.1/bazel/ray_deps_setup.bzl:67:14: No implicit mirrors used for com_github_spdlog because urls were explicitly provided
DEBUG: /usr/ports/devel/py-ray/work-py311/ray-ray-2.44.1/bazel/ray_deps_setup.bzl:67:14: No implicit mirrors used for com_google_absl because urls were explicitly provided
INFO: Repository python3_9 instantiated at:
  /usr/ports/devel/py-ray/work-py311/ray-ray-2.44.1/WORKSPACE:49:27: in <toplevel>
  /usr/home/yuri/.cache/bazel/_bazel_yuri/5254ee5028c0cce1d3a4d6ebf8932e6e/external/rules_python/python/repositories.bzl:296:34: in python_register_toolchains
Repository rule resolved_interpreter_os_alias defined at:
  /usr/home/yuri/.cache/bazel/_bazel_yuri/5254ee5028c0cce1d3a4d6ebf8932e6e/external/rules_python/python/private/toolchains_repo.bzl:123:48: in <toplevel>
ERROR: An error occurred during the fetch of repository 'python3_9':
   Traceback (most recent call last):
        File "/usr/home/yuri/.cache/bazel/_bazel_yuri/5254ee5028c0cce1d3a4d6ebf8932e6e/external/rules_python/python/private/toolchains_repo.bzl", line 81, column 13, in _resolved_interpreter_os_alias_impl
                fail("No platform declared for host OS {} on arch {}".format(os_name, arch))
Error in fail: No platform declared for host OS freebsd on arch amd64
ERROR: /usr/ports/devel/py-ray/work-py311/ray-ray-2.44.1/WORKSPACE:49:27: fetching resolved_interpreter_os_alias rule //external:python3_9: Traceback (most recent call last):
        File "/usr/home/yuri/.cache/bazel/_bazel_yuri/5254ee5028c0cce1d3a4d6ebf8932e6e/external/rules_python/python/private/toolchains_repo.bzl", line 81, column 13, in _resolved_interpreter_os_alias_impl
                fail("No platform declared for host OS {} on arch {}".format(os_name, arch))
Error in fail: No platform declared for host OS freebsd on arch amd64
ERROR: Error computing the main repository mapping: no such package '@python3_9//': No platform declared for host OS freebsd on arch amd64
Loading: 
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
    main()
  File "/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", line 373, in main
    json_out["return_val"] = hook(**hook_input["kwargs"])
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/pyproject_hooks/_in_process/_in_process.py", line 280, in build_wheel
    return _build_backend().build_wheel(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 244, in build_wheel
    return self._build_with_temp_dir(['bdist_wheel'], '.whl',
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 229, in _build_with_temp_dir
    self.run_setup()
  File "/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 282, in run_setup
    self).run_setup(setup_script=setup_script)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/setuptools/build_meta.py", line 174, in run_setup
    exec(compile(code, __file__, 'exec'), locals())
  File "setup.py", line 807, in <module>
    setuptools.setup(
  File "/usr/local/lib/python3.11/site-packages/setuptools/__init__.py", line 87, in setup
    return distutils.core.setup(**attrs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/core.py", line 177, in setup
    return run_commands(dist)
           ^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/core.py", line 193, in run_commands
    dist.run_commands()
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/dist.py", line 968, in run_commands
    self.run_command(cmd)
  File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", line 1217, in run_command
    super().run_command(command)
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/dist.py", line 987, in run_command
    cmd_obj.run()
  File "/usr/local/lib/python3.11/site-packages/wheel/_bdist_wheel.py", line 387, in run
    self.run_command("build")
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/cmd.py", line 317, in run_command
    self.distribution.run_command(command)
  File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", line 1217, in run_command
    super().run_command(command)
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/dist.py", line 987, in run_command
    cmd_obj.run()
  File "/usr/local/lib/python3.11/site-packages/setuptools/command/build.py", line 24, in run
    super().run()
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/command/build.py", line 131, in run
    self.run_command(cmd_name)
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/cmd.py", line 317, in run_command
    self.distribution.run_command(command)
  File "/usr/local/lib/python3.11/site-packages/setuptools/dist.py", line 1217, in run_command
    super().run_command(command)
  File "/usr/local/lib/python3.11/site-packages/setuptools/_distutils/dist.py", line 987, in run_command
    cmd_obj.run()
  File "setup.py", line 795, in run
    return pip_run(self)
           ^^^^^^^^^^^^^
  File "setup.py", line 704, in pip_run
    build(True, BUILD_JAVA, True)
  File "setup.py", line 660, in build
    return bazel_invoke(
           ^^^^^^^^^^^^^
  File "setup.py", line 431, in bazel_invoke
    result = invoker([cmd] + cmdline, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/subprocess.py", line 413, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['bazel', 'build', '--verbose_failures', '--incompatible_strict_action_env', '--', '//:ray_pkg', '//cpp:ray_cpp_pkg']' returned non-zero exit status 1.

ERROR Backend subprocess exited when trying to invoke build_wheel
*** Error code 1

Version: 1.3.0
FreeBSD 14.2
Project is: https://github.com/ray-project/ray

[aignas]

FreeBSD is not a Tier1 supported platform (see #2722), however, feel free to create a PR that adds FreeBSD to the list of known platforms in the pypi integration code. Search for existing dictionaries that have "linux", etc in them.

[yurivict]

Does it have to depend on downloaded wheels?
Can it depend on pre-installed python packages?
We already have functioning python packages and they should be used for all purposes.

[aignas]

Bazel usually provides a hermetic setup that builds the packages from scratch or fetches the wheels. If you want to use pre-installed packages, you have to configure the toolchain on your own. I think our docs have an example how to use system python.

[rickeylev]

To use a local system python toolchain, there's two ways, see these docs/examples

• https://github.com/bazel-contrib/rules_python/blob/main/tests/integration/local_toolchains/MODULE.bazel
• https://rules-python.readthedocs.io/en/latest/toolchains.html#autodetecting-toolchain