1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0-only
3
4diff_patch=$1
5
6mkdir -p "$(dirname "${diff_patch}")"
7
8git -C "${srctree:-.}" diff HEAD > "${diff_patch}"
9
10if [ ! -s "${diff_patch}" ] ||
11   [ -z "$(git -C "${srctree:-.}" ls-files --other --exclude-standard | head -n1)" ]; then
12	exit
13fi
14
15# The source tarball, which is generated by 'git archive', contains everything
16# you committed in the repository. If you have local diff ('git diff HEAD'),
17# it will go into ${diff_patch}. If untracked files are remaining, the resulting
18# source package may not be correct.
19#
20# Examples:
21#  - You modified a source file to add #include "new-header.h"
22#    but forgot to add new-header.h
23#  - You modified a Makefile to add 'obj-$(CONFIG_FOO) += new-dirver.o'
24#    but you forgot to add new-driver.c
25#
26# You need to commit them, or at least stage them by 'git add'.
27#
28# This script does not take care of untracked files because doing so would
29# introduce additional complexity. Instead, print a warning message here if
30# untracked files are found.
31# If all untracked files are just garbage, you can ignore this warning.
32echo >&2 "============================ WARNING ============================"
33echo >&2 "Your working tree has diff from HEAD, and also untracked file(s)."
34echo >&2 "Please make sure you did 'git add' for all new files you need in"
35echo >&2 "the source package."
36echo >&2 "================================================================="
37