1#!/bin/sh
2#
3# This scripts adds local version information from the version
4# control systems git, mercurial (hg) and subversion (svn).
5#
6# If something goes wrong, send a mail the kernel build mailinglist
7# (see MAINTAINERS) and CC Nico Schottelius
8# <nico-linuxsetlocalversion -at- schottelius.org>.
9#
10#
11
12usage() {
13	echo "Usage: $0 [--save-scmversion] [srctree]" >&2
14	exit 1
15}
16
17scm_only=false
18srctree=.
19if test "$1" = "--save-scmversion"; then
20	scm_only=true
21	shift
22fi
23if test $# -gt 0; then
24	srctree=$1
25	shift
26fi
27if test $# -gt 0 -o ! -d "$srctree"; then
28	usage
29fi
30
31scm_version()
32{
33	local short
34	short=false
35
36	cd "$srctree"
37	if test -e .scmversion; then
38		cat .scmversion
39		return
40	fi
41	if test "$1" = "--short"; then
42		short=true
43	fi
44
45	# Check for git and a git repo.
46	if test -z "$(git rev-parse --show-cdup 2>/dev/null)" &&
47	   head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
48
49		# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
50		# it, because this version is defined in the top level Makefile.
51		if [ -z "`git describe --exact-match 2>/dev/null`" ]; then
52
53			# If only the short version is requested, don't bother
54			# running further git commands
55			if $short; then
56				echo "+"
57				return
58			fi
59			# If we are past a tagged commit (like
60			# "v2.6.30-rc5-302-g72357d5"), we pretty print it.
61			if atag="`git describe 2>/dev/null`"; then
62				echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
63
64			# If we don't have a tag at all we print -g{commitish}.
65			else
66				printf '%s%s' -g $head
67			fi
68		fi
69
70		# Is this git on svn?
71		if git config --get svn-remote.svn.url >/dev/null; then
72			printf -- '-svn%s' "`git svn find-rev $head`"
73		fi
74
75		# Check for uncommitted changes
76		if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
77			printf '%s' -dirty
78		fi
79
80		# All done with git
81		return
82	fi
83
84	# Check for mercurial and a mercurial repo.
85	if test -d .hg && hgid=`hg id 2>/dev/null`; then
86		# Do we have an tagged version?  If so, latesttagdistance == 1
87		if [ "`hg log -r . --template '{latesttagdistance}'`" == "1" ]; then
88			id=`hg log -r . --template '{latesttag}'`
89			printf '%s%s' -hg "$id"
90		else
91			tag=`printf '%s' "$hgid" | cut -d' ' -f2`
92			if [ -z "$tag" -o "$tag" = tip ]; then
93				id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
94				printf '%s%s' -hg "$id"
95			fi
96		fi
97
98		# Are there uncommitted changes?
99		# These are represented by + after the changeset id.
100		case "$hgid" in
101			*+|*+\ *) printf '%s' -dirty ;;
102		esac
103
104		# All done with mercurial
105		return
106	fi
107
108	# Check for svn and a svn repo.
109	if rev=`LANG= LC_ALL= LC_MESSAGES=C svn info 2>/dev/null | grep '^Last Changed Rev'`; then
110		rev=`echo $rev | awk '{print $NF}'`
111		printf -- '-svn%s' "$rev"
112
113		# All done with svn
114		return
115	fi
116}
117
118collect_files()
119{
120	local file res
121
122	for file; do
123		case "$file" in
124		*\~*)
125			continue
126			;;
127		esac
128		if test -e "$file"; then
129			res="$res$(cat "$file")"
130		fi
131	done
132	echo "$res"
133}
134
135if $scm_only; then
136	if test ! -e .scmversion; then
137		res=$(scm_version)
138		echo "$res" >.scmversion
139	fi
140	exit
141fi
142
143if test -e include/config/auto.conf; then
144	# We are interested only in CONFIG_LOCALVERSION and
145        # CONFIG_LOCALVERSION_AUTO, so extract these in a safe
146        # way (i.e. w/o sourcing auto.conf)
147	CONFIG_LOCALVERSION=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION=/ {print $2}'`
148	CONFIG_LOCALVERSION_AUTO=`cat include/config/auto.conf | awk -F '=' '/^CONFIG_LOCALVERSION_AUTO=/ {print $2}'`
149else
150	echo "Error: kernelrelease not valid - run 'make prepare' to update it"
151	exit 1
152fi
153
154# localversion* files in the build and source directory
155res="$(collect_files localversion*)"
156if test ! "$srctree" -ef .; then
157	res="$res$(collect_files "$srctree"/localversion*)"
158fi
159
160# CONFIG_LOCALVERSION and LOCALVERSION (if set)
161res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}"
162
163# scm version string if not at a tagged commit
164if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
165	# full scm version string
166	res="$res$(scm_version)"
167else
168	# append a plus sign if the repository is not in a clean
169	# annotated or signed tagged state (as git describe only
170	# looks at signed or annotated tags - git tag -a/-s) and
171	# LOCALVERSION= is not specified
172	if test "${LOCALVERSION+set}" != "set"; then
173		scm=$(scm_version --short)
174		res="$res${scm:++}"
175	fi
176fi
177
178echo "$res"
179