#!/usr/bin/env bash 

set -eu

synopsis() {
	cat << EOF
Usage : `basename $0` [-h] [option...] src dst
EOF
}

help() {
	cat << EOF

`basename $0` effectue un scp à partir ou à destination d'un système virtuel.

`synopsis`

-h      : affiche cette aide

Les options autorisées sont celles de scp(1). 

Exemple :

  # Copie de l'hôte vers la machine virtuelle
  # /etc/passwd de l'hôte vers /tmp de la machine virtuelle
  
  vdn-scp /etc/passwd test@vm-1:/tmp
  
  # Copie de la machine virtuelle vers l'hôte
  # /etc/passwd de la machine virtuelle vers /tmp de l'hôte

  vdn-scp test@vm-1:/etc/passwd /tmp
  
EOF
}

usage() {
	synopsis
	exit 1
}

args() {
	opts=""

	[ $# -eq 1 -a "$1" = "-h" ] && { help; exit 0; }

	while [ $# -gt 2 ]; do
		if [ "$1" = "-h" ]; then help; exit 0; fi
		opts="$opts $1"
		shift
	done

	LOGIN="${USER}@"
	GUEST_NAME=""

	for i in 1 2; do
		reg=':'
		if [[ "$1" =~ "$reg" ]]; then
			user=`echo $1 | cut -d ':' -f 1`
			path=`echo $1 | cut -d ':' -f 2`
			LOGIN="${USER}@"
			GUEST_NAME="$user"
			reg="@"
			if [[ "$user" =~ "$reg" ]]; then
				LOGIN=`echo $user | cut -d '@' -f 1`@
				GUEST_NAME=`echo $user | cut -d '@' -f 2`
			fi
			path="${LOGIN}localhost:$path"
		else
			path="$1"
		fi

		[ $i -eq 1 ] && src="$path" || dst="$path"

		shift
	done

	#echo "opts=$opts src=$src dst=$dst GUEST_NAME=$GUEST_NAME"

}


# Programme principal

GUEST_OWNER=$USER

VDN_PATH=$(readlink -f $(dirname $0)/..); . $VDN_PATH/bin/functions.sh

args "$@"

[ -z "$GUEST_NAME" ] && usage

#setGuestVars $GUEST_NAME
#loadGuestVars $GUEST_NAME

[ ! -e $TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-redirs ] &&
	error "Impossible de joindre $GUEST_NAME"

SSH_REDIR_PORT=`cat $TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-redirs | \
	sed -rne 's/^tcp:([0-9]+):22(:|$).*$/\1/p'`

[ -z "$SSH_REDIR_PORT" ] && error "Impossible de joindre $GUEST_NAME"

if [ -z "$SSH_REDIR_PORT" ]; then
	error "Aucune redirection vers le port 22 du système $GUEST_NAME !"
	exit 1
fi

SSH_MASTER=""
[ $SSH_GUEST_MASTER = 1 ] && {
	sshGuestControlMaster
	SSH_MASTER="-o ControlPath=$TMPDIR/vdn-$GUEST_NAME-$GUEST_OWNER-guest-%r@%h:%p"
}

scp $SSH_MASTER $SCP_OPTS $opts -P $SSH_REDIR_PORT $src $dst