add validation for python_path

Author: mai93

python/private/py_executable.bzl

@@ -1136,6 +1136,9 @@ def _get_runtime_details(ctx, semantics):
     # TOOD(bazelbuild/bazel#7901): Remove this once --python_path flag is removed.
 
     flag_interpreter_path = read_possibly_native_flag(ctx, "python_path")
+    if not flag_interpreter_path.startswith("python") and not paths.is_absolute(flag_interpreter_path):
+        fail("python_path must be an absolute path when it is set.")
+        
     toolchain_runtime, effective_runtime = _maybe_get_runtime_from_ctx(ctx)
     if not effective_runtime:
         # Clear these just in case

tests/integration/ignore_root_user_error/WORKSPACE

@@ -1,5 +1,3 @@
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
 local_repository(
     name = "rules_python",
     path = "../../..",