Factored common functionality out of the Courgette stress test scripts

courgette/analyze_stress_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 metrics analyzing the output of a stress test
 
+source "$(dirname ${0})/stress_test_common"
+
 set -e
 
-error() {
-  echo "error: ${@}" >&2
-}
-
-# Given a token, search for and count the instances of lines from the
-# logfile that start with the token.
-count_result() {
-  if [ ! -z "${1}" ]; then
-    echo $(cat "${log}" | grep "^${1} " | wc -l)    
-  else
-    echo 0
-  fi
-}
-
 # Given a token, search for and compute the percentiles from logfile.
 compute_percentiles() {
   if [ ! -z "${1}" ]; then
     local pctls=".5 .9 1"
     local lines=$(count_result ${1})
     for p in $pctls; do
       local count="$(echo "${lines} * $p" | bc -lq | cut -d. -f1)"
       echo -n $(cat ${log} \
         | grep ${1} \
         | cut -d' ' -f2 \
@@ skipping 92 matching lines @@
     | awk '{printf "%.2f\n", $0}')"
   echo "${pct_savings}% savings (xz)"
 
   echo "$(compute_percentiles "TIME_GEN")to generate a patch (50th 90th 100th)"
   echo "$(compute_percentiles "TIME_APPLY")to apply a patch (50th 90th 100th)"
   echo "$(compute_percentiles "TIME_BSDIFF")for bsdiff (50th 90th 100th)"
   echo "$(compute_percentiles "TIME_BSPATCH")for bspatch (50th 90th 100th)"
 }
 
 main "${@}"