From 46d30599da28c49657c7991c86c64f4f7b1ff4f0 Mon Sep 17 00:00:00 2001
From: Kirill Andriianov <kirill@andriianov.ru>
Date: Tue, 11 Feb 2025 23:58:02 +0100
Subject: [PATCH] feat: Make implicit include paths explicit. This is useful
 for development, since tooling, that reads compile_commands.json will see all
 includes. Fixes issue with clangd on nixos

---
 CMakeLists.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 133eb5220671..f32f022fc408 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,15 @@ set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
 
 project(userver)
 
+# Generate compile_commands.json by default
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
+if(CMAKE_EXPORT_COMPILE_COMMANDS)
+  # Make sure the file is generated with all implicit paths spelled out explicitly
+  # This makes clangd usable on nix-based setups
+  set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES
+    ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
+endif()
+
 set(USERVER_ROOT_DIR "${CMAKE_CURRENT_LIST_DIR}")
 
 option(