1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3#
4# This scripts adds local version information from the version
5# control systems git, mercurial (hg) and subversion (svn).
6#
7# If something goes wrong, send a mail the kernel build mailinglist
8# (see MAINTAINERS) and CC Nico Schottelius
9# <nico-linuxsetlocalversion -at- schottelius.org>.
10#
11#
12
13usage() {
14	echo "Usage: $0 [--save-scmversion] [srctree]" >&2
15	exit 1
16}
17
18scm_only=false
19srctree=.
20if test "$1" = "--save-scmversion"; then
21	scm_only=true
22	shift
23fi
24if test $# -gt 0; then
25	srctree=$1
26	shift
27fi
28if test $# -gt 0 -o ! -d "$srctree"; then
29	usage
30fi
31
32scm_version()
33{
34	local short
35	short=false
36
37	cd "$srctree"
38	if test -e .scmversion; then
39		cat .scmversion
40		return
41	fi
42	if test "$1" = "--short"; then
43		short=true
44	fi
45
46	# Check for git and a git repo.
47	if test -z "$(git rev-parse --show-cdup 2>/dev/null)" &&
48	   head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
49
50		# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
51		# it, because this version is defined in the top level Makefile.
52		if [ -z "`git describe --exact-match 2>/dev/null`" ]; then
53
54			# If only the short version is requested, don't bother
55			# running further git commands
56			if $short; then
57				echo "+"
58				return
59			fi
60			# If we are past a tagged commit (like
61			# "v2.6.30-rc5-302-g72357d5"), we pretty print it.
62			if atag="`git describe 2>/dev/null`"; then
63				echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
64
65			# If we don't have a tag at all we print -g{commitish}.
66			else
67				printf '%s%s' -g $head
68			fi
69		fi
70
71		# Is this git on svn?
72		if git config --get svn-remote.svn.url >/dev/null; then
73			printf -- '-svn%s' "`git svn find-rev $head`"
74		fi
75
76		# Check for uncommitted changes
77		if git status -uno --porcelain | grep -qv '^.. scripts/package'; then
78			printf '%s' -dirty
79		fi
80
81		# All done with git
82		return
83	fi
84
85	# Check for mercurial and a mercurial repo.
86	if test -d .hg && hgid=`hg id 2>/dev/null`; then
87		# Do we have an tagged version?  If so, latesttagdistance == 1
88		if [ "`hg log -r . --template '{latesttagdistance}'`" == "1" ]; then
89			id=`hg log -r . --template '{latesttag}'`
90			printf '%s%s' -hg "$id"
91		else
92			tag=`printf '%s' "$hgid" | cut -d' ' -f2`
93			if [ -z "$tag" -o "$tag" = tip ]; then
94				id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
95				printf '%s%s' -hg "$id"
96			fi
97		fi
98
99		# Are there uncommitted changes?
100		# These are represented by + after the changeset id.
101		case "$hgid" in
102			*+|*+\ *) printf '%s' -dirty ;;
103		esac
104
105		# All done with mercurial
106		return
107	fi
108
109	# Check for svn and a svn repo.
110	if rev=`LANG= LC_ALL= LC_MESSAGES=C svn info 2>/dev/null | grep '^Last Changed Rev'`; then
111		rev=`echo $rev | awk '{print $NF}'`
112		printf -- '-svn%s' "$rev"
113
114		# All done with svn
115		return
116	fi
117}
118
119collect_files()
120{
121	local file res
122
123	for file; do
124		case "$file" in
125		*\~*)
126			continue
127			;;
128		esac
129		if test -e "$file"; then
130			res="$res$(cat "$file")"
131		fi
132	done
133	echo "$res"
134}
135
136if $scm_only; then
137	if test ! -e .scmversion; then
138		res=$(scm_version)
139		echo "$res" >.scmversion
140	fi
141	exit
142fi
143
144if test -e include/config/auto.conf; then
145	. include/config/auto.conf
146else
147	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
148	exit 1
149fi
150
151# localversion* files in the build and source directory
152res="$(collect_files localversion*)"
153if test ! "$srctree" -ef .; then
154	res="$res$(collect_files "$srctree"/localversion*)"
155fi
156
157# CONFIG_LOCALVERSION and LOCALVERSION (if set)
158res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}"
159
160# scm version string if not at a tagged commit
161if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
162	# full scm version string
163	res="$res$(scm_version)"
164else
165	# append a plus sign if the repository is not in a clean
166	# annotated or signed tagged state (as git describe only
167	# looks at signed or annotated tags - git tag -a/-s) and
168	# LOCALVERSION= is not specified
169	if test "${LOCALVERSION+set}" != "set"; then
170		scm=$(scm_version --short)
171		res="$res${scm:++}"
172	fi
173fi
174
175echo "$res"
176