From 09f1e89b4b32e3d34c5abd18577c0f3be22c0287 Mon Sep 17 00:00:00 2001
From: Dave Roth <davidroth@google.com>
Date: Fri, 10 Jan 2025 10:57:21 -0800
Subject: [PATCH] Remove BUILD.bazel before symlinking when creating
 new_local_repository

Fixes #24770

Closes #24887.

PiperOrigin-RevId: 714107497
Change-Id: Ib914aa54b2afa2a90fcce2f2263b9c1b2d2c193c
---
 tools/build_defs/repo/local.bzl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/build_defs/repo/local.bzl b/tools/build_defs/repo/local.bzl
index 69e0c1ae0b98a5..67da117c421c05 100644
--- a/tools/build_defs/repo/local.bzl
+++ b/tools/build_defs/repo/local.bzl
@@ -94,6 +94,9 @@ def _new_local_repository_impl(rctx):
             rctx.watch(child)
 
     if rctx.attr.build_file != None:
+        # Remove any existing BUILD.bazel in the repository to ensure
+        # the symlink to the defined build_file doesn't fail.
+        rctx.delete("BUILD.bazel")
         rctx.symlink(rctx.attr.build_file, "BUILD.bazel")
         if rctx.os.name.startswith("windows"):
             rctx.watch(rctx.attr.build_file)  # same reason as above