#!/usr/bin/env bash

# We want to catch any unexpected failure, and exit immediately
set -e

# Download helper for svn, to be called from the download wrapper script
#
# Call it as:
#   .../svn [-q] OUT_FILE REPO_URL REV BASNAME
#
# Environment:
#   SVN      : the svn command to call

verbose=
while getopts :q OPT; do
    case "${OPT}" in
    q)  verbose=-q;;
    \?) printf "unknown option '%s'\n" "${OPTARG}" >&2; exit 1;;
    esac
done
shift $((OPTIND-1))

output="${1}"
repo="${2}"
rev="${3}"
basename="${4}"

# Caller needs to single-quote its arguments to prevent them from
# being expanded a second time (in case there are spaces in them)
_svn() {
    eval ${SVN} "${@}"
}

_svn export ${verbose} "'${repo}@${rev}'" "'${basename}'"

tar czf "${output}" "${basename}"