#!/bin/sh

log()
{
	echo $@
}

err()
{
	log $@
}

fatal()
{
	err $@
	exit 1
}

marker()
{
	log "# ============= $@"
}

config()
{
	# guess pdir
	pdir=`pwd`
	while [ `cat $pdir/CVS/Repository 2>/dev/null` != proj ]; do
		[ "$pdir" = / ] && fatal "didn't find \"proj\" in directory components"
		pdir=`dirname $pdir`
	done
	pdirs=`(cd $pdir; ls -d */.git | sed 's%/.git%%')`
}

# ------------- commands
run()
{(
	local d
	local cmd=$1
	shift
	config
	cd $pdir

	for d in $pdirs; do
		marker $d
		git -C $d $cmd "$@"
	done
)}

clone()
{(
	local p
	config
	cd $pdir
	local id=$PGIT_CLONE_FROM_USER
	local projects="$PGIT_CLONE_PROJECTS"
	[ "$id" ] || id=`whoami`
	if [ -z "$projects" ]; then
		projects=`$SSH git.jannet.de /opt/ytools/bin/git-srv-admin.sh -u $id -j list-personal-projects`
		[ "$?" != 0 ] && exit 1
	fi
	for p in $projects; do
		[ -d $p ] && {
			marker "skipping existing $p"
			continue
		}
		marker "cloning $p"
		git clone ssh://$id@git.jannet.de/srv/git/$id/proj/$p
		git -C $p submodule init || fatal git submodule init failed in `pwd`
		git -C $p submodule update || fatal git submodule update failed in `pwd`
	done
)}

diff()
{(
	local d
	config
	cd $pdir
	for d in $pdirs; do
		marker $d
		git -C $d diff --src-prefix=a/$d/ --dst-prefix=b/$d/ "$@"
	done
)}

SSH=ssh
[ "$GIT_SSH" ] && SSH=$GIT_SSH

cmd=$1
shift
case $cmd in
	clone|diff)
		$cmd "$@"
		;;
	*)
		run $cmd "$@"
		;;
esac