git-modechange

#!/bin/bash

if [[ $1 == "-h" || $1 == '--help' ]]; then
	echo "Usage: $0"
	echo "Show files with only a mode-change and optionally revert these changes"
	exit 0
fi
# Find files which have only had their filemode changed, not the content, and print out their filenames,
# then pipe this to git checkout HEAD
FILES=$(git diff --numstat | awk '{ if (($1 == "-" && $2 == "-") || ($1 == "0" && $2 == "0")) print $3 }')

if [ "x$FILES" != "x" ]; then
	echo "The following files have had their modes changed, but not their content:"
	git diff --numstat | awk '{ if (($1 == "-" && $2 == "-") || ($1 == "0" && $2 == "0")) print $3 }'
	echo -e -n "\n\nRevert these files to HEAD version (y/N) ? "
	read X
	if [ "$X" = "y" ]; then
		# save all changes in case
		git stash save "_gitmodechange$(date +%Y%m%d_%H%M%S)"
		# Re-apply the changes before working
		git stash apply
		git diff --numstat | awk 'BEGIN { ORS="\0" } { if (($1 == "-" && $2 == "-") || ($1 == "0" && $2 == "0")) print $3 }' | xargs -0 git checkout HEAD
	else
		echo "Files left unchanged."
	fi
fi