fixup! feat(google_benchmark): add file name to benchmark URI

Author: GuillaumeLagrange

google_benchmark/cmake/Codspeed.cmake

@@ -1,14 +1,27 @@
 add_subdirectory(${PROJECT_SOURCE_DIR}/../core codspeed)
 
 execute_process(
-  COMMAND git rev-parse --show-toplevel
-  OUTPUT_VARIABLE GIT_ROOT_DIR
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
+    COMMAND git rev-parse --show-toplevel
+    OUTPUT_VARIABLE GIT_ROOT_DIR
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    RESULT_VARIABLE GIT_COMMAND_RESULT
+)
 
-target_compile_definitions(codspeed
-                           INTERFACE -DCODSPEED_GIT_ROOT_DIR="${GIT_ROOT_DIR}")
+if(NOT GIT_COMMAND_RESULT EQUAL 0)
+    message(
+        WARNING
+        "Failed to determine the git root directory.\
+        Check that git is in your PATH, and that you are in a git repository.\
+        Continuing, but codspeed features will not be useable"
+    )
+    # Default to user's cmake source directory
+    set(GIT_ROOT_DIR ${CMAKE_SOURCE_DIR})
+endif()
 
-# Step 1: Check if CODSPEED_MODE is set via the command line
+target_compile_definitions(
+    codspeed
+    INTERFACE -DCODSPEED_GIT_ROOT_DIR="${GIT_ROOT_DIR}"
+)
 
 if(DEFINED CODSPEED_MODE)
     # Define a preprocessor macro based on the build mode