build: Enable incompatible_no_implicit_file_export in bazelrc (#3477)

Identified by
https://github.com/bazelbuild/bazel/pull/27674#issuecomment-3686476093,
I want to see what else fails when flipping this flag on top of
https://github.com/bazel-contrib/rules_python/pull/3471.

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 718f830..2467657 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -38,5 +38,6 @@
 build:rtd --enable_bzlmod
 
 common --incompatible_python_disallow_native_rules
+common --incompatible_no_implicit_file_export
 
 build --lockfile_mode=update

python/private/pypi/BUILD.bazel

diff --git a/python/private/pypi/BUILD.bazel b/python/private/pypi/BUILD.bazel
index aa96cf8..96ae42f 100644
--- a/python/private/pypi/BUILD.bazel
+++ b/python/private/pypi/BUILD.bazel
@@ -23,6 +23,11 @@
     visibility = ["//visibility:public"],
 )
 
+exports_files(
+    srcs = ["deps.bzl"],
+    visibility = ["//tools/private/update_deps:__pkg__"],
+)
+
 filegroup(
     name = "distribution",
     srcs = glob(

python/private/pypi/generate_whl_library_build_bazel.bzl

diff --git a/python/private/pypi/generate_whl_library_build_bazel.bzl b/python/private/pypi/generate_whl_library_build_bazel.bzl
index e207f6d..fbabe2e 100644
--- a/python/private/pypi/generate_whl_library_build_bazel.bzl
+++ b/python/private/pypi/generate_whl_library_build_bazel.bzl
@@ -100,6 +100,18 @@
     ])
 
     additional_content = []
+    entry_points = kwargs.get("entry_points")
+    if entry_points:
+        entry_point_files = sorted({
+            entry_point_script.replace("\\", "/"): True
+            for entry_point_script in entry_points.values()
+        }.keys())
+        additional_content.append(
+            "exports_files(\n" +
+            "    srcs = {},\n".format(render.list(entry_point_files)) +
+            "    visibility = [\"//visibility:public\"],\n" +
+            ")\n",
+        )
     if annotation:
         kwargs["data"] = annotation.data
         kwargs["copy_files"] = annotation.copy_files

tests/pypi/generate_whl_library_build_bazel/generate_whl_library_build_bazel_tests.bzl

diff --git a/tests/pypi/generate_whl_library_build_bazel/generate_whl_library_build_bazel_tests.bzl b/tests/pypi/generate_whl_library_build_bazel/generate_whl_library_build_bazel_tests.bzl
index 39c2eb4..85e96be 100644
--- a/tests/pypi/generate_whl_library_build_bazel/generate_whl_library_build_bazel_tests.bzl
+++ b/tests/pypi/generate_whl_library_build_bazel/generate_whl_library_build_bazel_tests.bzl
@@ -56,6 +56,11 @@
     tags = ["tag1"],
 )
 
+exports_files(
+    srcs = ["bar.py"],
+    visibility = ["//visibility:public"],
+)
+
 # SOMETHING SPECIAL AT THE END
 """
     actual = generate_whl_library_build_bazel(
@@ -122,6 +127,11 @@
     srcs_exclude = ["srcs_exclude_all"],
 )
 
+exports_files(
+    srcs = ["bar.py"],
+    visibility = ["//visibility:public"],
+)
+
 # SOMETHING SPECIAL AT THE END
 """
     actual = generate_whl_library_build_bazel(
@@ -187,6 +197,11 @@
     srcs_exclude = ["srcs_exclude_all"],
 )
 
+exports_files(
+    srcs = ["bar.py"],
+    visibility = ["//visibility:public"],
+)
+
 # SOMETHING SPECIAL AT THE END
 """
     actual = generate_whl_library_build_bazel(
@@ -252,6 +267,11 @@
     srcs_exclude = ["srcs_exclude_all"],
 )
 
+exports_files(
+    srcs = ["bar.py"],
+    visibility = ["//visibility:public"],
+)
+
 # SOMETHING SPECIAL AT THE END
 """
     actual = generate_whl_library_build_bazel(