#!/bin/sh

set -e

PRG=$(basename "$0")

showhelp() {
	cat <<EOF
Usage:   $PRG POOL [ DISTRIBUTION [ OTHERMIRROR] ]

Examples:
    $PRG sarge
    $PRG sarge+hacks sarge 'deb http://example.com/ sarge hacks'
EOF
}

exit1() {
	echo "ERROR: $1"
	exit 1
}

ask() {
	echo -n "$1 (y/N)? "
	read response
	case "$response" in
	    y|Y)
		:
		;;
	    *)
		return 1
		;;
	esac
	return
}

if [ $# -eq 0 ]; then
	showhelp
	exit1 "not enough parameters"
fi

pool=$1
distro=${2:-$pool}

basepath="/var/cache/pbuilder/cow-$pool"
aptcache="/var/cache/pbuilder/aptcache-$pool/"
buildresult="$HOME/src/pbuild-$pool/"

makepaths=''
for path in "$aptcache" "$buildresult"; do
	if [ ! -d "$path" ]; then
		echo "W: Needed path \"$path\" does not exist"
		makepaths='yes'
	fi
done
if [ "$makepaths" = 'yes' ]; then
	[ "$force" = 'yes' ] \
		|| ask 'Create the missing path(s)' \
		|| exit1 "Cannot continue without those missing paths"
	mkdir -p "$buildresult"
	sudo mkdir -p "$aptcache"
fi

if [ -d "$basepath" ]; then
	echo "W: Needed path \"$path\" already exists"
	[ "$force" = 'yes' ] \
		|| ask 'Remove the path' \
		|| exit1 "Cannot continue with that path already there"
	sudo rm -rf "$basepath"
fi

sudo cowbuilder --create \
	--buildresult "$buildresult" \
	--distribution "$distro" \
	--basepath "$basepath" \
	--aptcache "$aptcache" \
	${3:+--othermirror "$3"}