aurget

#!/bin/bash
#
# Copyright (c) 2012, Clemens Buchacher <drizzd@aon.at>
#
# The code in query() is originally from packer, if I recall correctly.
#
# Depends on curl, jshon.
#

set -e

AURURL='https://aur.archlinux.org'

usage() {
	echo "$(basename $0) package" >&2
	exit 1
}

query()  # name : array
{
	field=$1
	pkg=$2

	j="$(curl -Gs --data-urlencode "arg=$pkg" "$AURURL/rpc.php?type=info")"
	if test "$(jshon -e resultcount <<< "$j")" -ne 1
	then
		echo "Not found: $pkg" >&2
		return 2
	fi

	jshon -e results -e "$field" -u <<< "$j"
}

if test $# -ne 1
then
	usage
fi

path=$(query URLPath "$1")
archive=$(mktemp)
curl -Gs "${AURURL}${path}" >"$archive"
tar tzf "$archive" | cut -f1 -d/ | uniq |
while read dir
do
	if test -e "$dir"
	then
		echo "Cannot overwrite existing directory: $dir" >&2
		exit 2
	fi
done
tar xzf "$archive"
rm -f "$archive"