# Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).

# All rights reserved.

# This component and the accompanying materials are made available

# under the terms of "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Nokia Corporation - initial contribution.

#

# Contributors:

#

# Description:

# Eshell Launcher

# Depends on the current working directory providing

# the drive of the currently used SDK.

# 

#

use Cwd;

#

# Check the argument(s), if any.

#

$numArgs = $#ARGV + 1;

if($numArgs == 0) 

	{

    	&launchEshell("udeb","winscw");

    	exit(0);

	}

if($numArgs > 2) 

	{

    	&printHelp;

    	die "ERROR: Too many arguments.\n";

	}

if($numArgs == 1)

	{ 

	if(lc($ARGV[0]) eq "-rel") 

		{

    		&launchEshell("urel","winscw");

    		exit(0);

		}

	if(lc($ARGV[0]) eq "-wins") 

		{

    		&launchEshell("udeb", "wins");

    		exit(0);

		}

	if(lc($ARGV[0]) eq "-winscw") 

		{

    		&launchEshell("udeb", "winscw");

    		exit(0);

		}

	if(lc($ARGV[0]) eq "-help") 

		{

    		&printHelp;

    		exit(0);

		}

	}

if ($numArgs == 2)

	{

	if(lc($ARGV[0]) eq "-rel") 

		{

		if (lc($ARGV[1]) eq "-wins")

			{

    			&launchEshell("urel","wins");

    			exit(0);

			}

		if (lc($ARGV[1]) eq "-winscw")

			{

    			&launchEshell("urel","winscw");

    			exit(0);

			}

		}	

	if (lc($ARGV[0]) eq "-winscw")

		{

		if (lc($ARGV[1] eq "-rel"))

			{

			&launchEshell("urel","winscw");

			exit(0);	

			}

		}

	if (lc($ARGV[0]) eq "-wins")

		{

		if (lc($ARGV[1] eq "-rel"))

			{

			&launchEshell("urel","wins");

			exit(0);	

			}

		}	

	}

# Error, unknown argument.

&printHelp;

die "ERROR: Unknown argument " . "\"" . $ARGV[0] . "\".\n";

sub launchEshell

{

    my ($type,$win) = @_;

    $epocroot = &getEpocroot;

    $drive = &getDrive;

    $emu = $drive . $epocroot . "epoc32" . "\\" 

	. "release\\" . $win . "\\" . $type . "\\" . "eshell.exe";

    -e $emu ||

	die "ERROR: File \"$emu\" not found.\n\n" .

	    "The EPOCROOT environment variable does not identify\n" .

	    "a valid eshell installation on this drive.\n" . 

		"EPOCROOT must be an absolute path to an existing\n" .

		    "directory - it should have no drive qualifier and\n" .

			"must end with a backslash.\n";

	#add the stuff to use the console

	$emu.=" -MConsole --";

    # If the execute is successful, this never returns.

    exec($emu) || die "Failed to execute eshell \"$emu\": $!";

}

sub printHelp

{

    print "Eshell Launcher\n";

    print "Syntax :\teshell [-rel] [-wins|-winscw] [-help]\n";

    print "(no options)\tLaunch active winscw debug eshell\n";

    print "-rel\t\tLaunch active release eshell\n";

    print "-wins\t\tLaunch active wins eshell\n";

    print "-winscw\t\tLaunch active winscw eshell\n";

    print "-help\t\tOutput this help message\n";

}

#

# Determines, validates, and returns EPOCROOT.

#

sub getEpocroot

{

    my $epocroot = $ENV{EPOCROOT};

    die "ERROR: Must set the EPOCROOT environment variable.\n"

	if (!defined($epocroot));

    $epocroot =~ s-/-\\-go;	# for those working with UNIX shells

    die "ERROR: EPOCROOT must be an absolute path, " .

	"not containing a drive letter.\n" if ($epocroot !~ /^\\/);

    die "ERROR: EPOCROOT must not be a UNC path.\n" if ($epocroot =~ /^\\\\/);

    die "ERROR: EPOCROOT must end with a backslash.\n" if ($epocroot !~ /\\$/);

    die "ERROR: EPOCROOT must specify an existing directory.\n" 

	if (!-d $epocroot);

    return $epocroot;

}

#

# Determines and returns the current drive, if any.

#

sub getDrive

{

    my $wd = cwd;

    if($wd =~ /^([a-zA-Z]:)/) {

	$drive = $1;

    } else {

	# Perhaps we're on a machine that has no drives.

	$drive = "";

    }

    return $drive;

}