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# Check whether a directory is a Git repository with uncommitted changes
# Enter given directory or bail
cd -- "${1:-.}" || exit
# If not a Git repository at all, warn explicitly
if ! isgr ; then
printf >&2 'grc: Not a Git repository\n'
exit 1
fi
# Exit 0 if the first command gives any output (added files) or the second one
# exits 1 (inverted; differences in tracked files)
[ -n "$(git ls-files --others --exclude-standard)" ] ||
! git diff-index --quiet HEAD
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