From 498a86c6d1bda2720c52208745b43c19c683971d Mon Sep 17 00:00:00 2001
From: Ward Fisher <wfisher@ucar.edu>
Date: Tue, 21 May 2024 10:46:43 -0600
Subject: [PATCH] Expand comment.

---
 cmake/dependencies.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cmake/dependencies.cmake b/cmake/dependencies.cmake
index 19bd40d9..fd50db86 100644
--- a/cmake/dependencies.cmake
+++ b/cmake/dependencies.cmake
@@ -2,12 +2,14 @@ include(FetchContent)
 
 
 ################################################################################
-# Function to reduce repeated code, set 
+# Function to reduce repeated code, set a value to a variable only if the
+# variable is not already defined. 
 function(set_git_default git_var git_val)
 
   if(NOT ${git_var})
     set(${git_var} ${git_val} PARENT_SCOPE)
   endif()
+
 endfunction(set_git_default)
 
 ################################################################################