Added flag_values for free_threading argument to point to correct paths of the headers and the library.

Author: vfdev-5

python/config_settings/BUILD.bazel

@@ -12,6 +12,7 @@ load(
 load(
     "//python/private/pypi:flags.bzl",
     "UniversalWhlFlag",
+    "UseFreeThreadingFlag",
     "UseWhlFlag",
     "WhlLibcFlag",
     "define_pypi_internal_flags",
@@ -170,3 +171,10 @@ string_flag(
 define_pypi_internal_flags(
     name = "define_pypi_internal_flags",
 )
+
+string_flag(
+    name = "free_threading",
+    build_setting_default = UseFreeThreadingFlag.NO,
+    values = sorted(UseFreeThreadingFlag.__members__.values()),
+    visibility = ["//visibility:public"],
+)

python/private/hermetic_runtime_repo_setup.bzl

@@ -27,7 +27,8 @@ def define_hermetic_runtime_toolchain_impl(
         extra_files_glob_exclude,
         python_version,
         python_bin,
-        coverage_tool):
+        coverage_tool,
+        free_threading = False):
     """Define a toolchain implementation for a python-build-standalone repo.
 
     It expected this macro is called in the top-level package of an extracted
@@ -44,13 +45,17 @@ def define_hermetic_runtime_toolchain_impl(
         python_version: {type}`str` The Python version, in `major.minor.micro`
             format.
         python_bin: {type}`str` The path to the Python binary within the
-            repositoroy.
+            repository.
         coverage_tool: {type}`str` optional target to the coverage tool to
             use.
+        free_threading: {type}`bool` optional free-threading support.
+            Default, False.
     """
     _ = name  # @unused
     version_info = semver(python_version)
     version_dict = version_info.to_dict()
+    version_dict["ft_postfix"] = "t" if free_threading else ""
+
     native.filegroup(
         name = "files",
         srcs = native.glob(
@@ -67,19 +72,19 @@ def define_hermetic_runtime_toolchain_impl(
                 "**/* *",  # Bazel does not support spaces in file names.
                 # Unused shared libraries. `python` executable and the `:libpython` target
                 # depend on `libpython{python_version}.so.1.0`.
-                "lib/libpython{major}.{minor}.so".format(**version_dict),
+                "lib/libpython{major}.{minor}{ft_postfix}.so".format(**version_dict),
                 # static libraries
                 "lib/**/*.a",
                 # tests for the standard libraries.
-                "lib/python{major}.{minor}/**/test/**".format(**version_dict),
-                "lib/python{major}.{minor}/**/tests/**".format(**version_dict),
+                "lib/python{major}.{minor}{ft_postfix}/**/test/**".format(**version_dict),
+                "lib/python{major}.{minor}{ft_postfix}/**/tests/**".format(**version_dict),
                 "**/__pycache__/*.pyc.*",  # During pyc creation, temp files named *.pyc.NNN are created
             ] + extra_files_glob_exclude,
         ),
     )
     cc_import(
         name = "interface",
-        interface_library = "libs/python{major}{minor}.lib".format(**version_dict),
+        interface_library = "libs/python{major}{minor}{ft_postfix}.lib".format(**version_dict),
         system_provided = True,
     )
 
@@ -96,7 +101,7 @@ def define_hermetic_runtime_toolchain_impl(
         hdrs = [":includes"],
         includes = [
             "include",
-            "include/python{major}.{minor}".format(**version_dict),
+            "include/python{major}.{minor}{ft_postfix}".format(**version_dict),
             "include/python{major}.{minor}m".format(**version_dict),
         ],
     )
@@ -105,11 +110,11 @@ def define_hermetic_runtime_toolchain_impl(
         hdrs = [":includes"],
         srcs = select({
             "@platforms//os:linux": [
-                "lib/libpython{major}.{minor}.so".format(**version_dict),
-                "lib/libpython{major}.{minor}.so.1.0".format(**version_dict),
+                "lib/libpython{major}.{minor}{ft_postfix}.so".format(**version_dict),
+                "lib/libpython{major}.{minor}{ft_postfix}.so.1.0".format(**version_dict),
             ],
-            "@platforms//os:macos": ["lib/libpython{major}.{minor}.dylib".format(**version_dict)],
-            "@platforms//os:windows": ["python3.dll", "libs/python{major}{minor}.lib".format(**version_dict)],
+            "@platforms//os:macos": ["lib/libpython{major}.{minor}{ft_postfix}.dylib".format(**version_dict)],
+            "@platforms//os:windows": ["python3.dll", "libs/python{major}{minor}{ft_postfix}.lib".format(**version_dict)],
         }),
     )
 

python/private/pypi/flags.bzl

@@ -70,6 +70,14 @@ INTERNAL_FLAGS = [
     "whl_pycp3x_abicp",
 ]
 
+# Determines if we use CPython with free-threading (disabled GIL)
+#
+# buildifier: disable=name-conventions
+UseFreeThreadingFlag = enum(
+    YES = "yes",
+    NO = "no",
+)
+
 def define_pypi_internal_flags(name):
     for flag in INTERNAL_FLAGS:
         string_flag(

python/private/python.bzl

@@ -357,6 +357,13 @@ def _process_single_version_overrides(*, tag, _fail = fail, default):
             for platform in sha256
         }
 
+    if tag.flag_values:
+        # Normalize flag keys to strings
+        flag_values = {str(k): v for k, v in tag.flag_values.items()}
+        override["flag_values"] = flag_values
+    if tag.suffix:
+        override["suffix"] = tag.suffix
+
     available_versions[tag.python_version] = {k: v for k, v in override.items() if v}
 
     if tag.distutils_content:
@@ -789,6 +796,15 @@ class.
             mandatory = False,
             doc = "The URL template to fetch releases for this Python version. See {attr}`python.single_version_platform_override.urls` for documentation.",
         ),
+        "flag_values": attr.string_dict(
+            mandatory = False,
+            doc = "TODO",
+        ),
+        "suffix": attr.string(
+            mandatory = False,
+            doc = "TODO",
+            default = "",
+        )
     },
 )
 

python/private/python_register_toolchains.bzl

@@ -129,6 +129,12 @@ def python_register_toolchains(
                 )],
             )
 
+        flag_values = tool_versions[python_version].get("flag_values", None)
+        free_threading_label = "@rules_python//python/config_settings:free_threading"
+        free_threading = False
+        if flag_values:
+            free_threading = flag_values.get(free_threading_label, False) == "yes"
+        suffix = tool_versions[python_version].get("suffix", "")
         python_repository(
             name = "{name}_{platform}".format(
                 name = name,
@@ -143,6 +149,7 @@ def python_register_toolchains(
             urls = urls,
             strip_prefix = strip_prefix,
             coverage_tool = coverage_tool,
+            free_threading = free_threading,
             **kwargs
         )
         if register_toolchains:

python/private/python_repository.bzl

@@ -67,6 +67,7 @@ def _python_repository_impl(rctx):
     release_filename = rctx.attr.release_filename
     urls = rctx.attr.urls or [rctx.attr.url]
     auth = get_auth(rctx, urls)
+    free_threading = rctx.attr.free_threading
 
     if release_filename.endswith(".zst"):
         rctx.download(
@@ -130,7 +131,8 @@ def _python_repository_impl(rctx):
     if "windows" in platform:
         distutils_path = "Lib/distutils/distutils.cfg"
     else:
-        distutils_path = "lib/python{}/distutils/distutils.cfg".format(python_short_version)
+        ft_postfix = "t" if free_threading else ""
+        distutils_path = "lib/python{}{}/distutils/distutils.cfg".format(python_short_version, ft_postfix)
     if rctx.attr.distutils:
         rctx.file(distutils_path, rctx.read(rctx.attr.distutils))
     elif rctx.attr.distutils_content:
@@ -255,13 +257,15 @@ define_hermetic_runtime_toolchain_impl(
   python_version = {python_version},
   python_bin = {python_bin},
   coverage_tool = {coverage_tool},
+  free_threading = {free_threading},
 )
 """.format(
         extra_files_glob_exclude = render.list(glob_exclude),
         extra_files_glob_include = render.list(glob_include),
         python_bin = render.str(python_bin),
         python_version = render.str(rctx.attr.python_version),
         coverage_tool = render.str(coverage_tool),
+        free_threading = free_threading,
     )
     rctx.delete("python")
     rctx.symlink(python_bin, "python")
@@ -321,6 +325,10 @@ For more information see {attr}`py_runtime.coverage_tool`.
                   "Either distutils or distutils_content can be specified, but not both.",
             mandatory = False,
         ),
+        "free_threading": attr.bool(
+            doc = "Whether we use CPython interpreter in free-threading mode (disabled GIL).",
+            default = False,
+        ),
         "ignore_root_user_error": attr.bool(
             default = False,
             doc = "Whether the check for root should be ignored or not. This causes cache misses with .pyc files.",