Use {git, hg, svn} commit id if available for xen_changeset

As Xen uses git as primary repository, get git commit id for
xen_changeset info.

Signed-off-by: Marek Marczykowski <marmarek@invisiblethingslab.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/xen/tools/scmversion b/xen/tools/scmversion
new file mode 100755
index 0000000000..219d898803
--- /dev/null
+++ b/xen/tools/scmversion
@@ -0,0 +1,101 @@
+#!/bin/sh
+#
+# This scripts adds local version information from the version
+# control systems git, mercurial (hg) and subversion (svn).
+#
+# If something goes wrong, send a mail the kernel build mailinglist
+# (see MAINTAINERS) and CC Nico Schottelius
+# <nico-linuxsetlocalversion -at- schottelius.org>.
+#
+# Based on setlocalversion from Linux kernel
+#
+#
+
+usage() {
+	echo "Usage: $0 [--save-scmversion] [srctree]" >&2
+	exit 1
+}
+
+scm_only=false
+srctree=.
+if test "$1" = "--save-scmversion"; then
+	scm_only=true
+	shift
+fi
+if test $# -gt 0; then
+	srctree=$1
+	shift
+fi
+if test $# -gt 0 -o ! -d "$srctree"; then
+	usage
+fi
+
+scm_version()
+{
+	local short
+	short=false
+
+	cd "$srctree"
+	if test -e .scmversion; then
+		cat .scmversion
+		return
+	fi
+	if test "$1" = "--short"; then
+		short=true
+	fi
+
+	# Check for git and a git repo.
+	if test -d .git && head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
+		date=`git show -s --pretty="%ad" HEAD`
+
+		printf '%s %s%s' "$date" git: $head
+
+		# Is this git on svn?
+		if git config --get svn-remote.svn.url >/dev/null; then
+			printf -- 'svn:%s' "`git svn find-rev $head`"
+		fi
+
+		# Update index only on r/w media
+		[ -w . ] && git update-index --refresh --unmerged > /dev/null
+
+		# Check for uncommitted changes
+		if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
+			printf '%s' -dirty
+		fi
+
+		# All done with git
+		return
+	fi
+
+	# Check for mercurial and a mercurial repo.
+	if test -d .hg && hgid=`hg id 2>/dev/null`; then
+		id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
+		date=`hg parents --template "{date|date}"`
+		printf '%s %s%s' "$date" hg: "$id"
+
+		# Are there uncommitted changes?
+		# These are represented by + after the changeset id.
+		case "$hgid" in
+			*+|*+\ *) printf '%s' -dirty ;;
+		esac
+
+		# All done with mercurial
+		return
+	fi
+
+	# Check for svn and a svn repo.
+	if rev=`LANG= LC_ALL= LC_MESSAGES=C svn info 2>/dev/null | grep '^Last Changed Rev'`; then
+		rev=`echo $rev | awk '{print $NF}'`
+		printf -- 'svn:%s' "$rev"
+
+		# All done with svn
+		return
+	fi
+}
+
+cd $srctree
+
+# full scm version string
+res="$(scm_version)"
+
+echo "$res"