support/download/cp

   1 #!/usr/bin/env bash
   2
   3 # We want to catch any unexpected failure, and exit immediately
   4 set -e
   5
   6 # Download helper for cp, to be called from the download wrapper script
   7 #
   8 # Call it as:
   9 #   .../cp [-q] OUT_FILE SRC_FILE
  10 #
  11 # Environment:
  12 #   LOCALFILES: the cp command to call
  13
  14 # 'cp' usually does not print anything on its stdout, whereas the
  15 # other download backends, even if not verbose, at least print some
  16 # progress information.
  17 # Make 'cp' verbose by default, so it behaves a bit like the others.
  18 verbose=-v
  19
  20 while getopts :q OPT; do
  21     case "${OPT}" in
  22     q)  verbose=;;
  23     \?) printf "unknown option '%s'\n" "${OPTARG}" >&2; exit 1;;
  24     esac
  25 done
  26 shift $((OPTIND-1))
  27
  28 output="${1}"
  29 source="${2}"
  30
  31 shift 2 # Get rid of our options
  32
  33 # Caller needs to single-quote its arguments to prevent them from
  34 # being expanded a second time (in case there are spaces in them)
  35 _localfiles() {
  36     eval ${LOCALFILES} "${@}"
  37 }
  38
  39 _localfiles ${verbose} "${@}""'${source}'" "'${output}'"