#!/bin/sh

# Push changes from local git-svn mirrors to gitorious repositories:
BASE_DIR=/home/git
PUSH_MIRROR=gitorious
FORCE_UPLOAD=0

set -e

while getopts 'fh' opt; do
	case "$opt" in
	f) FORCE_UPLOAD=1;;
	h) usage; exit 0;;
	\?) usage; exit 1;;
	esac
done

shift $((OPTIND-1))

REPOS="${1:-asterisk dahdi-linux dahdi-tools libpri octapi}"

# An explicit list of heads to mirror. Don't push any random working branch
# svn_* - branchs
# v[0-9]* - tags
# vPR[0-9]* - tags of octapi
mirrored_refs() {
	{
		git show-ref --heads | grep 'heads/svn_'
		git show-ref --tags | egrep 'tags/v(|PR)[0-9]+\.'
	} | sed -e 's|^.*/\([^/]*\)$|\1|'
}

mirror_repo() {
	# Sanity check: make sure we already set up mirroring:
	if ! grep -q "^\[remote \"$PUSH_MIRROR\"\]" .git/config; then
		return
	fi
	git push --quiet --thin --force "$PUSH_MIRROR" `mirrored_refs`
}

# A quick snapshot of this repository. To help check if anything changed:
remotes_checksum() {
	git show-ref | grep /remotes/ | sha1sum | cut -d' ' -f1
}

for repo in $REPOS; do
	cd $BASE_DIR/$repo
	git checkout --quiet master
	sum_before=`remotes_checksum`
	git svn fetch --quiet --fetch-all	
	sum_after=`remotes_checksum`
	if  [ "$sum_before" = "$sum_after" ] && [ "$FORCE_UPLOAD" = 0 ]; then
		continue
	fi
	../asterisk-tools/update_branches
	../asterisk-tools/update_tags
	mirror_repo
done