#!/bin/bash

#

# Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

# Usage: sh shell-tracer.sh <TIME_CMD_TYPE> <TIME_CMD> <OUTPUT_FILE> <shell command line>

#

# This shell script is supposed to be set as a replacement for SHELL in make,

# causing it to be called whenever make wants to execute shell commands.

# The <shell command line> is suitable for passing on to the old shell,

# typically beginning with -c.

#

# This script will run the shell command line and it will also store a simple

# log of the the time it takes to execute the command in the OUTPUT_FILE, using

# utility for time measure specified with TIME_CMD option.

#

# Type of time measure utility is specified with TIME_CMD_TYPE option.

# Recognized options values of TIME_CMD_TYPE option: "gnutime", "flock".

TIME_CMD_TYPE="$1"

TIME_CMD="$2"

OUTPUT_FILE="$3"

shift

shift

shift

if [ "$TIME_CMD_TYPE" = "gnutime" ]; then

  # Escape backslashes (\) and percent chars (%). See man for GNU 'time'.

  msg=${@//\\/\\\\}

  msg=${msg//%/%%}

  "$TIME_CMD" -f "[TIME:%E] $msg" -a -o "$OUTPUT_FILE" "$@"

elif [ "$TIME_CMD_TYPE" = "flock" ]; then

  # Emulated GNU 'time' with 'flock' and 'date'.

  ts=`date +%s%3N`

  "$@"

  status=$?

  ts2=`date +%s%3N`

  millis=$((ts2 - ts))

  ms=$(($millis % 1000))

  seconds=$((millis / 1000))

  ss=$(($seconds % 60))

  minutes=$(($seconds / 60))

  mm=$(($minutes % 60))

  hh=$(($minutes / 60)):

  [ $hh != "0:" ] || hh=

  # Synchronize on this script.

  flock -w 10 "$0" printf "[TIME:${hh}${mm}:${ss}.%.2s] %s\n" $ms "$*" >> "$OUTPUT_FILE" || true

  exit $status

else

  "$@"

fi