Factored common functionality out of the Courgette stress test scripts

courgette/analyze_mem_test

 #!/bin/bash
 
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Produce memory metrics for run_apply_test
 
-error() {
-  echo "error: ${@}" >&2
-}
+source "$(dirname ${0})/stress_test_common"
 
 compute_percentiles() {
   if [ -z "${1}" ]; then
     return;
   fi
   local pctls=".5 .9 1"
   local lines=$(cat ${1} | wc -l)
   for p in $pctls; do
     local count="$(echo "${lines} * $p" | bc -lq | cut -d. -f1)"
     local bytes=$(cat ${1} \
@@ skipping 65 matching lines @@
         | head -n1
     done | sort -k2 -n > "${metrics_bsdiff_tmp}"
     mv "${metrics_bsdiff_tmp}" "${metrics_bsdiff}"
   fi
 
   echo "$(compute_percentiles ${metrics_bsdiff})max heap per file for bsdiff" \
     "(50th 90th 100th)"
 }
 
 main "${@}"