[Core] Add bazel run :refresh_compile_commands for clangd

BUILD.bazel

@@ -15,6 +15,7 @@ load("@com_github_grpc_grpc//bazel:cython_library.bzl", "pyx_library")
 load("@com_github_google_flatbuffers//:build_defs.bzl", "flatbuffer_cc_library")
 load("//bazel:ray.bzl", "COPTS", "PYX_COPTS", "PYX_SRCS", "copy_to_workspace", "ray_cc_binary", "ray_cc_library", "ray_cc_test")
 load("@python3_9//:defs.bzl", python39 = "interpreter")
+load("@hedron_compile_commands//:refresh_compile_commands.bzl", "refresh_compile_commands")
 
 package(
     default_visibility = ["//visibility:public"],
@@ -85,6 +86,27 @@ config_setting(
     flag_values = {":jemalloc_flag": "true"},
 )
 
+# bazel run :refresh_compile_commands for compile_commands generation for clangd
+# https://github.com/hedronvision/bazel-compile-commands-extractor?tab=readme-ov-file#vscode - directions for clangd config
+refresh_compile_commands(
+    name = "refresh_compile_commands",
+    # Specify the targets of interest.
+    # For example, specify a dict of targets and any flags required to build.
+    targets = {
+      "//:ray_pkg": "",
+    },
+    exclude_external_sources = True, # removed below to have lsp index external cc files at the cost of 2x index time
+    # No need to add flags already in .bazelrc. They're automatically picked up.
+)
+
+# bazel run :refresh_compile_commands_external_sources for generation with external source files (cc files)
+refresh_compile_commands(
+    name = "refresh_compile_commands_external_sources",
+    targets = {
+      "//:ray_pkg": "",
+    },
+)
+
 # === Begin of rpc definitions ===
 # GRPC common lib.
 ray_cc_library(

WORKSPACE

@@ -33,8 +33,6 @@ versions.check(
     minimum_bazel_version = "6.5.0",
 )
 
-# Tools to generate `compile_commands.json` to enable awesome tooling of the C language family.
-# Just run `bazel run @hedron_compile_commands//:refresh_all`
 load("@hedron_compile_commands//:workspace_setup.bzl", "hedron_compile_commands_setup")
 
 hedron_compile_commands_setup()