#!/usr/bin/env perl

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use strict;

use Cwd;

# Usage: test.pl <SearchPath> <ExecutionMode> <TestResults> <Timeout [Default 300 seconds]>

# Variable declarations to keep strict happy

our $SEARCH_PATH;

our $EXEC_MODE;

our $EXE_PREFIX;

our $EXE_SUFFIX;

our $TIMEOUT;

our $REPORTDIR;

our $buryChildren;

our $timeoutChildren;

our $totalExecuted;

our $totalStarted;

our $totalTimedOut;

our $next;

our $currentDirectory;

# Where do we run this script? What directory?

$SEARCH_PATH=$ARGV[0];

if(!$SEARCH_PATH)

{

    print "Please specify the search directory! \n";

    exit(0);

}

# We have four options: 

# 'U': Unix

# 'W': Windows

# 'M': Mac

# 'E': Embedded

$EXEC_MODE=$ARGV[1];

if($EXEC_MODE =~ /^U$/)

{

    print "Using Unix execution mode\n";

    $EXE_PREFIX="./";

    $EXE_SUFFIX="";

} elsif($EXEC_MODE =~ /^W$/)

{

    print "Using Windows execution mode\n";

    $EXE_PREFIX="";

    $EXE_SUFFIX=".exe";

} elsif($EXEC_MODE =~ /^M$/)

{

    print "Using OSX execution mode\n";

    $EXE_PREFIX="/Content/MacOS/";

    $EXE_SUFFIX="";

} elsif($EXEC_MODE =~ /^E$/)

{

    print "Using embedded execution mode\n";

    $EXE_PREFIX="./";

    $EXE_SUFFIX="";

} else {

    print "Unknown execution mode: $EXEC_MODE \n";

    print "Use: 'U' (Unix), 'W' (Windows), 'M' (MacOSX)\n";

    exit(0);

}

# We get the current directory, we 'll need it afterwards

$currentDirectory = getcwd();

# We assume that by default goes to "reports" unless the user specifies it.

$REPORTDIR = $ARGV[2];

if(!$REPORTDIR)

{

    if($SEARCH_PATH =~ /^\.$/)

    {

#       '.' ie current directory

        $REPORTDIR = $currentDirectory."/reports";

    } elsif($SEARCH_PATH =~ /^\//) {

#       Absolute path

        $REPORTDIR = $SEARCH_PATH."/reports";

    } else {

#       Relative path

        $REPORTDIR = $currentDirectory.$SEARCH_PATH."/reports";

    }

}

# Let's create the directory

mkdir $REPORTDIR;

# If given we use it, otherwise we default to 300 seconds.

$TIMEOUT = $ARGV[3];

if(!$TIMEOUT)

{

    $TIMEOUT=300;

}

print "Timeout value: $TIMEOUT\n";

# Initialize 'global' variables

$buryChildren = 0;

$timeoutChildren = 0;

$totalExecuted = 0;

$totalStarted = 0;

$totalTimedOut = 0;

# Install signal handlers and pray for the best

$SIG{'CHLD'} = 'handleDeath';

$SIG{'ALRM'} = 'handleTimeout';

while ($next = <$SEARCH_PATH/*>) 

{

    if( -d $next )

    {

        print "Examining $next \n";

        chdir($next) || die("Could not chdir to $next");

        my @components;

        my $command;

        @components = split(/\//, $next);

        if($EXEC_MODE =~ /^M$/)

        {

            $command = "tst_".$components[1].".app";

        } else {

            $command = "tst_".$components[1];

        }

        if( -e $command)

        {

            print "Executing $command \n";

            my $myPid;

            $myPid = fork();

            if($myPid == 0)

            {

                my $realCommand;

                if($EXEC_MODE =~/^M$/)

                {

                    $realCommand = "./".$command.".app".$EXE_PREFIX.$command;

                } else {

                    $realCommand = $EXE_PREFIX.$command.$EXE_SUFFIX;

                }

                my $outputRedirection = $REPORTDIR."/".$command.".xml";

                if($EXEC_MODE =~ /^E$/)

                {

                    exec($realCommand, "-qws", "-xml", "-o", $outputRedirection);

                } else {

                    exec($realCommand, "-xml", "-o", $outputRedirection);

                }

                exit(0);

            } elsif($myPid > 0 )

            {

                $totalStarted++;

                alarm($TIMEOUT);

                while(!$buryChildren && !$timeoutChildren)

                {

                    sleep 10;

                }

                if($buryChildren)

                {

                    my $value;

                    $value = waitpid($myPid , 0);

                    $buryChildren = 0;

                    $totalExecuted++;

                } elsif($timeoutChildren)

                {

                    kill 'INT', $myPid;

                    $timeoutChildren = 0;

                    $totalTimedOut++;

                } else {

                    # What?? If we get here we need to abort, this is totally unexpected

                    print "Wrong condition evaluated, aborting to avoid damages\n";

                    exit(0);

                }

                # We need to handle children killed because of timeout

                if($buryChildren)

                {

                    my $value;

                    $value = waitpid($myPid , 0);

                    $buryChildren = 0;

                }

            } else {

                print "Problems trying to execute $command";

            }

        } 

    }

    chdir($currentDirectory);

}

print " ** Statistics ** \n";

print " Tests started: $totalStarted \n";

print " Tests executed: $totalExecuted \n";

print " Tests timed out: $totalTimedOut \n";

# This procedure takes care of handling dead children on due time

sub handleDeath {

    $buryChildren = 1;

}

# This takes care of timeouts

sub handleTimeout {

    $timeoutChildren = 1;

}