support/download/cp

#!/usr/bin/env bash

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

# Download helper for cp, to be called from the download wrapper script
#
# Call it as:
#   .../cp [-q] OUT_FILE SRC_FILE
#
# Environment:
#   LOCALFILES: the cp command to call

# 'cp' usually does not print anything on its stdout, whereas the
# other download backends, even if not verbose, at least print some
# progress information.
# Make 'cp' verbose by default, so it behaves a bit like the others.
verbose=-v

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

output="${1}"
source="${2}"

shift 2 # Get rid of our options

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

_localfiles ${verbose} "${@}""'${source}'" "'${output}'"