#!/bin/bash

declare -A usage
declare -A varia

summary="$0 [options] <repo>"

usage[b]="Branch of git repo"
varia[b]=branch
branch=master

usage[d]="Destination of clone"
varia[d]=dst
dst='.'

usage[i]="privkey used to ssh pull"
varia[i]=privkey
privkey=''


. driglibash-args


# Some SSH options
ssh_opt='ssh'
if [ -n "$privkey" ] ; then
	ssh_opt="$ssh_opt -i $privkey"
fi

repo="$1"
if [ -z "$repo" ] ; then
	die "$0: Empty repo given\n$summary"
fi

cd "$dst"

if [ -d .git ] ; then
	git fetch origin "$branch"
	git checkout --force -B "$branch" "origin/$branch"
    git reset --hard
	git clean -qffdx
	git submodule update --init --recursive --force --recommend-shallow
	git submodule foreach git fetch
	git submodule foreach git checkout --force -B "$branch" "origin/$branch"
	git submodule foreach git reset --hard
	git submodule foreach git clean -fdx
else
    git clone -b "$branch" --single-branch --recurse-submodules --shallow-submodules --depth 1 --config core.sshCommand="$ssh_opt" "$repo" .
fi