1#!/bin/sh
2#
3# This scripts adds local version information from the version
4# control systems git and mercurial (hg).
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# Based on setlocalversion from Linux kernel
11#
12#
13
14usage() {
15	echo "Usage: $0 [--save-scmversion] [srctree]" >&2
16	exit 1
17}
18
19save_scm=false
20srctree=.
21if test "$1" = "--save-scmversion"; then
22	save_scm=true
23	shift
24fi
25if test $# -gt 0; then
26	srctree=$1
27	shift
28fi
29if test $# -gt 0 -o ! -d "$srctree"; then
30	usage
31fi
32
33scm_version()
34{
35	if test -e .scmversion; then
36		cat .scmversion
37		return
38	fi
39
40	# Check for git and a git repo.
41	if test -d .git && head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
42		date=`git show -s --pretty="%ad" HEAD`
43
44		printf '%s %s%s' "$date" git: $head
45
46		# Is this git on svn?
47		if git config --get svn-remote.svn.url >/dev/null; then
48			printf -- 'svn:%s' "`git svn find-rev $head`"
49		fi
50
51		# Update index only on r/w media
52		[ -w . ] && git update-index --refresh --unmerged > /dev/null
53
54		# Check for uncommitted changes
55		if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
56			printf '%s' -dirty
57		fi
58
59		# All done with git
60		return
61	fi
62
63	# Check for mercurial and a mercurial repo.
64	if test -d .hg && hgid=`hg id 2>/dev/null`; then
65		id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
66		date=`hg parents --template "{date|date}"`
67		printf '%s %s%s' "$date" hg: "$id"
68
69		# Are there uncommitted changes?
70		# These are represented by + after the changeset id.
71		case "$hgid" in
72			*+|*+\ *) printf '%s' -dirty ;;
73		esac
74
75		# All done with mercurial
76		return
77	fi
78}
79
80cd $srctree
81
82# full scm version string
83res="$(scm_version)"
84
85if [ "$save_scm" = "true" ]; then
86    echo $res > .scmversion
87fi
88
89echo "$res"
90