patacongo commented on a change in pull request #1024:
URL: https://github.com/apache/incubator-nuttx/pull/1024#discussion_r422783386



##########
File path: tools/refresh.sh
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@@ -259,7 +229,7 @@ for CONFIG in ${CONFIGS}; do
 
   # Show differences
 
-  if ! $CMPCONFIG $DEFCONFIG defconfig; then
+  if ! diff $DEFCONFIG defconfig; then

Review comment:
       diff should be available.  The native build uses the GNUWin32 which are 
an ancient port of GNU tools that run natively on Wondows.
   
   Why not just unconditionally give the user the opportunity to save the 
defconfig if they provide the --prompt option even if there is not difference.  
I like the behavior of a change like:
   
       -    if ! $CMPCONFIG $DEFCONFIG defconfig; then
       +    $CMPCONFIG $DEFCONFIG defconfig
   




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