fixup - add index_url handling to uv.lock

Author: aignas

python/private/pypi/hub_builder.bzl

@@ -353,7 +353,7 @@ def _add_whl_library(self, *, python_version, whl, repo):
             if key in args and args[key] != None:
                 deps_args[key] = args[key]
 
-        deps_args["whl_library"] = "@{}//:BUILD.bazel".format(whl_repo_name)
+        deps_args["whl_library"] = "@{}//:BUILD.bazel".format(repo.whl_repo_name)
         repos_dict = self._whl_library_deps
 
     repo_name = "{}_{}_{}".format(self.name, version_label(python_version), repo.repo_name)
@@ -379,13 +379,14 @@ def _add_library(self, *, repos_dict, name, args):
         if diff:
             self._logger.fail(lambda: (
                 "Attempting to create a duplicate library {name} with different arguments. Already existing declaration has:\n".format(
-                    repo_name = name,
+                    name = name,
                 ) + "\n".join([
                     "    {}: {}".format(key, render.indent(render.dict(value)).lstrip())
                     for key, value in diff.items()
                     if value
                 ])
             ))
+
             return
     repos_dict[name] = args
 
@@ -585,15 +586,7 @@ def _create_whl_repos(
         for src in whl.srcs:
             repo = _whl_repo(
                 src = src,
-                # TODO @aignas 2026-07-04: add a test to ensure that overriding the default
-                # index url overrides the values here.
-                index_url = (
-                    whl.index_url or
-                    "{}/{}".format(
-                        self._default_index_url[python_version],
-                        whl.name,
-                    )
-                ).rstrip("/"),
+                index_url = whl.index_url.rstrip("/"),
                 whl_library_args = whl_library_args,
                 download_only = pip_attr.download_only,
                 netrc = self._config.netrc or pip_attr.netrc,

python/private/pypi/parse_requirements.bzl

@@ -176,6 +176,12 @@ def _parse_uv_lock_json(uv_lock, all_platforms, logger, extra_pip_args = None, p
             "versions": {},
         })
         entry["versions"][version] = None
+        registry = pkg.get("source", {}).get("registry", "")
+        if registry.rstrip("/").endswith("simple"):
+            index_url = "{}/{}".format(registry, norm_name.replace("_", "-"))
+        else:
+            index_url = ""
+        entry["index_url"] = index_url
 
         pkg_extras = sorted(extras_map.get(name, []))
         extra_str = "[{}]".format(",".join(pkg_extras)) if pkg_extras else ""
@@ -287,7 +293,7 @@ def _parse_uv_lock_json(uv_lock, all_platforms, logger, extra_pip_args = None, p
             name = norm_name,
             is_exposed = True,
             is_multiple_versions = len(versions) > 1,
-            index_url = "",
+            index_url = info["index_url"],
             srcs = info["resolved_srcs"],
         )
         ret.append(item)

python/private/pypi/simpleapi_download.bzl

@@ -291,6 +291,9 @@ def _with_index_url(index_url, values):
     if not values:
         return values
 
+    if not index_url:
+        fail("BUG: no index_url")
+
     return struct(
         sdists = values.sdists,
         whls = values.whls,

tests/pypi/hub_builder/hub_builder_tests.bzl

@@ -1498,7 +1498,7 @@ def _test_err_duplicate_repos(env):
     env.expect.that_dict(logs).keys().contains_exactly(["rules_python:unit-test FAIL:"])
     env.expect.that_collection(logs["rules_python:unit-test FAIL:"]).contains_exactly([
         """\
-Attempting to create a duplicate library pypi_315_foo for foo with different arguments. Already existing declaration has:
+Attempting to create a duplicate library pypi_315_foo with different arguments. Already existing declaration has:
     common: {
         "dep_template": "@pypi//{name}:{target}",
         "config_load": "@pypi//:config.bzl",