git-tagger.sh

#!/bin/sh
#
# git-tagger.sh
#
# automatically add a tag to the given git repositories
# input: a list of target git repositories that is generated by meta-debian
#
# (example)
# input: git.list.git.server.com,
# usage: ./git-tagger.sh git.list.git.server.com git.server.com tagname
#

WORKDIR=$(pwd)
LOG=$WORKDIR/git-tagger.log
GITLIST_SORT=$WORKDIR/git.list.sort
GITDIR=${WORKDIR}/git

usage() {
	echo "
usage: $0 <git.list> <server> <tag> [-d]

arguments:
    git.list : a list of git repositories generated by meta-debian
    server   : the git server name that provides all repositories in git.list
    tag      : net tag name

options:
    -d : delete mode; delete given tag in all repositories

example:
    $0 git.list.git.server.com git.server.com tagname
"
	exit 2
}

die() {
	echo "ERROR: $@" | tee -a $LOG
	exit 1
}

# arguments
GITLIST="$1"
SERVER="$2"
TAG="$3"
[ -n "$TAG" ] || usage
[ -f $GITLIST ] || die $GITLIST not found

# options
OPT="$4"

# tagging
rm -rf $LOG $GITDIR
if [ "$OPT" = "-d" ]; then
	echo "deleting tag \"$TAG\" in each repository..."
else
	echo "adding tag \"$TAG\" to each repository..."
fi

grep -v "^#" $GITLIST | sort | uniq > $GITLIST_SORT
while read line; do
	path=$(echo "$line" | cut -d " " -f 1)
	commit=$(echo "$line" | cut -d " " -f 2)
#	uri=git://$SERVER/$path
	uri=gitosis@$SERVER:$path

	if [ "$OPT" = "-d" ]; then
		echo "deleting $TAG in $uri" | tee -a $LOG
	else
		echo "adding $TAG to $uri $commit" | tee -a $LOG
	fi

	if [ "$OPT" = "-d" ]; then
		# confirm the target tag exists
		if [ -z "$(git ls-remote --tags $uri $TAG)" ]; then
			die "tag $TAG not found in $uri"
		fi
		# delete the tag
		mkdir $GITDIR || die "failed to create $GITDIR"
		cd $GITDIR
		git init >> $LOG 2>&1 || die "failed to initialize $GITDIR"
		echo "git push $uri :refs/tags/$TAG" >> $LOG
		git push $uri :refs/tags/$TAG >> $LOG 2>&1 || \
			die "failed to delete tag"
		cd $WORKDIR
	else
		# clone
		echo "git clone --bare $uri $GITDIR" >> $LOG
		git clone --bare $uri $GITDIR >> $LOG 2>&1 || \
			die "git clone failed"
		cd $GITDIR

		# confirm the target commit exists
		if ! git show -s --format=oneline $commit >/dev/null 2>&1; then
			die "commit $commit not found in $uri"
		fi
		# confirm the tag name is not used
		if git tag | grep -q '^'"$TAG"'$'; then
			die "tag $TAG is already used in $uri"
		fi

		# add a tag
		echo "git tag $TAG $commit" >> $LOG
		git tag $TAG $commit >> $LOG 2>&1 || die "git tag failed"
		# push
		echo "git push --tags" >> $LOG
		git push --tags >> $LOG 2>&1 || die "git push failed"

		cd $WORKDIR
	fi

	echo "----------------------------------------------------------------------" >> $LOG
	rm -rf $GITDIR
done < $GITLIST_SORT
rm -f $GITLIST_SORT

echo "done"