cleanup: remove support for extra actions (bazel-contrib#3210)

This removes the support for Bazel "extra actions".

These have been long deprecated and little to no usage. Because of how
long they've
been deprecated, their lack of use, and how long their replacement
(aspects) has
been available, this is not being considered a breaking change.

Fixes bazelbuild/bazel#16455
Fixes bazel-contrib#3215

---------

Co-authored-by: Richard Levasseur <rlevasseur@google.com>
Co-authored-by: Richard Levasseur <richardlev@gmail.com>

Author: comius

CHANGELOG.md

@@ -28,6 +28,10 @@ BEGIN_UNRELEASED_TEMPLATE
 
 [0.0.0]: https://github.com/bazel-contrib/rules_python/releases/tag/0.0.0
 
+{#v0-0-0-removed}
+### Removed
+
+* Nothing removed.
 {#v0-0-0-changed}
 ### Changed
 * Nothing changed.
@@ -40,9 +44,6 @@ BEGIN_UNRELEASED_TEMPLATE
 ### Added
 * Nothing added.
 
-{#v0-0-0-removed}
-### Removed
-* Nothing removed.
 
 END_UNRELEASED_TEMPLATE
 -->
@@ -52,6 +53,12 @@ END_UNRELEASED_TEMPLATE
 
 [0.0.0]: https://github.com/bazel-contrib/rules_python/releases/tag/0.0.0
 
+{#v0-0-0-removed}
+### Removed
+* (core rules) Support for Bazel's long deprecated "extra actions" has been
+  removed
+  ([#3215](https://github.com/bazel-contrib/rules_python/issues/3215)).
+
 {#v0-0-0-changed}
 ### Changed
 * Nothing changed.
@@ -66,9 +73,6 @@ END_UNRELEASED_TEMPLATE
 ### Added
 * Nothing added.
 
-{#v0-0-0-removed}
-### Removed
-* Nothing removed.
 
 {#v1-6-0}
 ## [1.6.0] - 2025-08-23

python/private/common.bzl

@@ -435,7 +435,6 @@ def create_py_info(
         if PyInfo in target or (BuiltinPyInfo != None and BuiltinPyInfo in target):
             py_info.merge(_get_py_info(target))
 
-    deps_transitive_sources = py_info.transitive_sources.build()
     py_info.transitive_sources.add(required_py_files)
 
     # We only look at data to calculate uses_shared_libraries, if it's already
@@ -457,7 +456,7 @@ def create_py_info(
             if py_info.get_uses_shared_libraries():
                 break
 
-    return py_info.build(), deps_transitive_sources, py_info.build_builtin_py_info()
+    return py_info.build(), py_info.build_builtin_py_info()
 
 def _get_py_info(target):
     return target[PyInfo] if PyInfo in target or BuiltinPyInfo == None else target[BuiltinPyInfo]

python/private/py_executable.bzl

@@ -1838,7 +1838,7 @@ def _create_providers(
             PyCcLinkParamsInfo(cc_info = cc_info),
         )
 
-    py_info, deps_transitive_sources, builtin_py_info = create_py_info(
+    py_info, builtin_py_info = create_py_info(
         ctx,
         original_sources = original_sources,
         required_py_files = required_py_files,
@@ -1848,14 +1848,6 @@ def _create_providers(
         imports = imports,
     )
 
-    # TODO(b/253059598): Remove support for extra actions; https://github.com/bazelbuild/bazel/issues/16455
-    listeners_enabled = _py_builtins.are_action_listeners_enabled(ctx)
-    if listeners_enabled:
-        _py_builtins.add_py_extra_pseudo_action(
-            ctx = ctx,
-            dependency_transitive_python_sources = deps_transitive_sources,
-        )
-
     providers.append(py_info)
     if builtin_py_info:
         providers.append(builtin_py_info)

python/private/py_library.bzl

@@ -45,7 +45,6 @@ load(":normalize_name.bzl", "normalize_name")
 load(":precompile.bzl", "maybe_precompile")
 load(":py_cc_link_params_info.bzl", "PyCcLinkParamsInfo")
 load(":py_info.bzl", "PyInfo", "VenvSymlinkEntry", "VenvSymlinkKind")
-load(":py_internal.bzl", "py_internal")
 load(":reexports.bzl", "BuiltinPyInfo")
 load(":rule_builders.bzl", "ruleb")
 load(
@@ -55,8 +54,6 @@ load(
 )
 load(":version.bzl", "version")
 
-_py_builtins = py_internal
-
 LIBRARY_ATTRS = dicts.add(
     COMMON_ATTRS,
     PY_SRCS_ATTRS,
@@ -164,7 +161,7 @@ def py_library_impl(ctx, *, semantics):
     imports, venv_symlinks = _get_imports_and_venv_symlinks(ctx, semantics)
 
     cc_info = semantics.get_cc_info_for_library(ctx)
-    py_info, deps_transitive_sources, builtins_py_info = create_py_info(
+    py_info, builtins_py_info = create_py_info(
         ctx,
         original_sources = direct_sources,
         required_py_files = required_py_files,
@@ -175,14 +172,6 @@ def py_library_impl(ctx, *, semantics):
         venv_symlinks = venv_symlinks,
     )
 
-    # TODO(b/253059598): Remove support for extra actions; https://github.com/bazelbuild/bazel/issues/16455
-    listeners_enabled = _py_builtins.are_action_listeners_enabled(ctx)
-    if listeners_enabled:
-        _py_builtins.add_py_extra_pseudo_action(
-            ctx = ctx,
-            dependency_transitive_python_sources = deps_transitive_sources,
-        )
-
     providers = [
         DefaultInfo(files = default_outputs, runfiles = runfiles),
         py_info,