Support for initial commits.

'git checkout' can fail when file is not in index, thus we should
fallback to removing the file. Support adding metadata.xml like old
sunrise-commit did.

sunrise-commit

@@ -151,7 +151,7 @@ check_for_changes() {
 vcs_reset() {
 	if [ ${SC_VCS%-svn} = git ]; then
 		req git reset -q HEAD "${1}"
-		req git checkout -f "${1}"
+		git checkout -f "${1}" 2>/dev/null || req rm -f ChangeLog
 	fi
 }
 
@@ -161,6 +161,10 @@ vcs_status() {
 	fi
 }
 
+vcs_add() {
+	${SC_VCS%-svn} add "$@"
+}
+
 vcs_commit() {
 	local msg
 	msg=${1}
@@ -294,6 +298,12 @@ main() {
 				if [ ! -f ChangeLog ]; then
 					[ -n "${trivial}" ] && die "Trivial change for an initial commit? You're joking, right?"
 					[ -z "${bns}" ] && die 'Please supply the bug number in the initial commit message!'
+					if [ ! -f metadata.xml ]; then
+						req cp ../../skel.metadata.xml metadata.xml
+						# Output similar to echangelog.
+						diff -dup /dev/null metadata.xml
+						req vcs_add metadata.xml
+					fi
 				fi
 
 				if [ -z "${trivial}" ]; then