From 6ad07f8b8c652059dee272b4c5c4d40f6ae1c6e8 Mon Sep 17 00:00:00 2001
From: Danielkonge <dakongsgaard@gmail.com>
Date: Thu, 23 Apr 2026 01:17:30 +0200
Subject: [PATCH] Fix rust-analyzer for core libraries

---
 rust/private/repository_utils.bzl |  5 ++++-
 rust/private/rust_analyzer.bzl    | 10 ++++++++++
 rust/repositories.bzl             | 19 +++++++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/rust/private/repository_utils.bzl b/rust/private/repository_utils.bzl
index ad8aea4814..786f4f2ab3 100644
--- a/rust/private/repository_utils.bzl
+++ b/rust/private/repository_utils.bzl
@@ -716,15 +716,18 @@ rust_analyzer_toolchain(
     name = "{name}",
     proc_macro_srv = {proc_macro_srv},
     rust_analyzer = {rust_analyzer},
+    rust_std = "//:rust_std-{target_triple}",
     rustc = "{rustc}",
     rustc_srcs = "//lib/rustlib/src:rustc_srcs",
+    cargo = "//:cargo",
     visibility = ["//visibility:public"],
 )
 """
 
-def BUILD_for_rust_analyzer_toolchain(name, rustc, proc_macro_srv, rust_analyzer = None):
+def BUILD_for_rust_analyzer_toolchain(name, target_triple, rustc, proc_macro_srv, rust_analyzer = None):
     return _build_file_for_rust_analyzer_toolchain_template.format(
         name = name,
+        target_triple = target_triple.str,
         rustc = rustc,
         proc_macro_srv = repr(proc_macro_srv),
         rust_analyzer = repr(rust_analyzer) if rust_analyzer else "None",
diff --git a/rust/private/rust_analyzer.bzl b/rust/private/rust_analyzer.bzl
index da41867985..8f3ad6508c 100644
--- a/rust/private/rust_analyzer.bzl
+++ b/rust/private/rust_analyzer.bzl
@@ -335,6 +335,12 @@ rust_analyzer_toolchain = rule(
             executable = True,
             allow_single_file = True,
         ),
+        "cargo": attr.label(
+            doc = "The path to a `cargo` binary.",
+            cfg = "exec",
+            executable = True,
+            allow_single_file = True,
+        ),
         "rustc": attr.label(
             doc = "The path to a `rustc` binary.",
             cfg = "exec",
@@ -350,6 +356,10 @@ rust_analyzer_toolchain = rule(
             doc = "The direct path to rustc srcs relative to rustc_srcs package root.",
             default = "library",
         ),
+        "rust_std": attr.label(
+            doc = "The core library of rust.",
+            mandatory = True,
+        ),
     },
 )
 
diff --git a/rust/repositories.bzl b/rust/repositories.bzl
index e4bd37f4c6..9bf89dc617 100644
--- a/rust/repositories.bzl
+++ b/rust/repositories.bzl
@@ -870,6 +870,24 @@ def _rust_analyzer_toolchain_tools_repository_impl(repository_ctx):
         build_contents.append(BUILD_for_rust_analyzer_proc_macro_srv(host_triple))
         proc_macro_srv = "//:rust_analyzer_proc_macro_srv"
 
+    rust_stdlib_content, rust_stdlib_sha256 = load_rust_stdlib(
+        ctx = repository_ctx,
+        target_triple = host_triple,
+        version = version,
+        iso_date = iso_date,
+    )
+    build_contents.append(rust_stdlib_content)
+    sha256s.update(rust_stdlib_sha256)
+
+    cargo_content, cargo_sha256 = load_cargo(
+        ctx = repository_ctx,
+        iso_date = iso_date,
+        target_triple = host_triple,
+        version = version,
+    )
+    build_contents.append(cargo_content)
+    sha256s.update(cargo_sha256)
+
     # Load rust-analyzer binary from official Rust distribution
     rust_analyzer = None
     rust_analyzer_content, rust_analyzer_sha256 = load_rust_analyzer(
@@ -885,6 +903,7 @@ def _rust_analyzer_toolchain_tools_repository_impl(repository_ctx):
 
     build_contents.append(BUILD_for_rust_analyzer_toolchain(
         name = "rust_analyzer_toolchain",
+        target_triple = host_triple,
         rustc = rustc,
         proc_macro_srv = proc_macro_srv,
         rust_analyzer = rust_analyzer,