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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
set -eu
diff_patch=$1
mkdir -p "$(dirname "${diff_patch}")"
git -C "${srctree:-.}" diff HEAD > "${diff_patch}"
if [ ! -s "${diff_patch}" ] ||
[ -z "$(git -C "${srctree:-.}" ls-files --other --exclude-standard | head -n1)" ]; then
exit
fi
# The source tarball, which is generated by 'git archive', contains everything
# you committed in the repository. If you have local diff ('git diff HEAD'),
# it will go into ${diff_patch}. If untracked files are remaining, the resulting
# source package may not be correct.
#
# Examples:
# - You modified a source file to add #include "new-header.h"
# but forgot to add new-header.h
# - You modified a Makefile to add 'obj-$(CONFIG_FOO) += new-dirver.o'
# but you forgot to add new-driver.c
#
# You need to commit them, or at least stage them by 'git add'.
#
# This script does not take care of untracked files because doing so would
# introduce additional complexity. Instead, print a warning message here if
# untracked files are found.
# If all untracked files are just garbage, you can ignore this warning.
echo >&2 "============================ WARNING ============================"
echo >&2 "Your working tree has diff from HEAD, and also untracked file(s)."
echo >&2 "Please make sure you did 'git add' for all new files you need in"
echo >&2 "the source package."
echo >&2 "================================================================="
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