Update dependency rules_python to v1.8.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rules_python	bazel_dep	minor	1.7.0 → 1.8.0

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Release Notes

bazel-contrib/rules_python (rules_python)

v1.8.0

Compare Source

{#v1-8-0-known-issues}

Known Issues

• (gazelle) Windows support for the Gazelle plugin may be broken. See
  #​3416 for
  details and possible workarounds.

{#v1-8-0-removed}

Removed

• (toolchain) Remove all of the python 3.8 toolchain support out of the box. Users need
  to pass the TOOL_VERSIONS that include 3.8 toolchains or use the bzlmod APIs to add
  them back. This means any hub pip.parse calls that target 3.8 will be ignored from
  now on. (#​2704)
  {object}python.single_version_override, like:

  python = use_extension("@​rules_python//python/extensions:python.bzl", "python")
  
  python.single_version_override(
      python_version = "3.8.20",
      sha256 = {
          "aarch64-apple-darwin": "2ddfc04bdb3e240f30fb782fa1deec6323799d0e857e0b63fa299218658fd3d4",
          "aarch64-unknown-linux-gnu": "9d8798f9e79e0fc0f36fcb95bfa28a1023407d51a8ea5944b4da711f1f75f1ed",
          "x86_64-apple-darwin": "68d060cd373255d2ca5b8b3441363d5aa7cc45b0c11bbccf52b1717c2b5aa8bb",
          "x86_64-pc-windows-msvc": "41b6709fec9c56419b7de1940d1f87fa62045aff81734480672dcb807eedc47e",
          "x86_64-unknown-linux-gnu": "285e141c36f88b2e9357654c5f77d1f8fb29cc25132698fe35bb30d787f38e87",
      },
      urls = ["https://github.com/astral-sh/python-build-standalone/releases/download/20241002/cpython-{python_version}+20241002-{platform}-{build}.tar.gz"],
  )

• (toolchain) Remove all of the python 3.9 toolchain versions except for the 3.9.25.
  This version has reached EOL and will no longer receive any security fixes, please update to
  3.10 or above. (#​2704)

• (toolchain) ignore_root_user_error has now been flipped to be always enabled and
  the chmod of the python toolchain directories have been removed. From now on rules_python
  always adds the pyc files to the glob excludes and in order to avoid any problems when using
  the toolchains in the repository phase, ensure that you pass -B to the python interpreter.
  (#​2016)

{#v1-8-0-changed}

Changed

• (toolchains) Use toolchains from the 20251031 release.
• (gazelle) Internally split modules mapping generation to be per-wheel for concurrency and caching.
• (pip) pipstar has been enabled for all whl_library instances where the whl
  is passed through a label or downloaded using the bazel downloader
  (#​2949).
• (pypi) pipstar flag default has been flipped to be on by default.
  It can be disabled through RULES_PYTHON_ENABLE_PIPSTAR=0 environment variable.
  If you do need to disable it, please add a comment to
  #​2949.
• (gazelle deps) rules_go bumped from 0.55.1 to 0.59.0
• (gazelle deps) gazelle bumped from 0.36.0 to 0.47.0

{#v1-8-0-fixed}

Fixed

• (gazelle) Remove {obj}py_binary targets with invalid srcs. This includes files
  that are not generated or regular files.
  #​3046
• (runfiles) Fix incorrect Python runfiles path assumption - the existing
  implementation assumes that it is always four levels below the runfiles
  directory, leading to incorrect path checks
  (#​3085).
• (toolchains) local toolchains now tell the sys.abiflags value of the
  underlying runtime.
• (toolchains) various local toolchain fixes: add abi3 header targets,
  fixes to linking, Windows DLL detection, and defines for free threaded
  runtimes.
• (toolchains) The python_headers target is now compatible with
  layering_check.
• (performance) 90% reduction in py_binary/py_test analysis phase cost.
  (#​3381).
• (gazelle) Fix gazelle_python_manifest.test so that it accesses manifest files via runfile path handling rather than directly (#​3397).
• (core rules) For the system_python bootstrap, the runfiles root is added to
  sys.path.
• (sphinxdocs) The sphinxdocs .serve target is now compatible with Bazel's --symlink_prefix
  flag (#​3410).

{#v1-8-0-added}

Added

• (toolchains) 3.9.25 Python toolchain from 20251031 release.
• (toolchains) 3.13.10, 3.14.1 Python toolchain from 20251202 release.
• (toolchains) 3.13.11, 3.14.2, 3.15.0a2 Python toolchains from 20251209 release.
• (pypi) API to tell pip.parse which platforms users care about. This is very useful to ensure
  that when users do bazel query for their deps, they don't have to download all of the
  dependencies for all of the available wheels. Torch wheels can be up of 1GB and it takes a lot
  of time to download those, which is unnecessary if only the host platform builds are necessary
  to be performed. This is mainly for backwards/forwards compatibility whilst rolling out
  RULES_PYTHON_ENABLE_PIPSTAR=1 by default. Users of experimental_index_url that perform
  cross-builds should add {obj}target_platforms to their pip.parse invocations, which will
  become mandatory if any cross-builds are required from the next release.
• (py_library) Attribute {obj}namespace_package_files added. It is a hint for
  optimizing venv creation.

{#v1-7-0}

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