#!/usr/bin/env perl


$numArgs = $#ARGV + 1;

if ($numArgs < 1) {
    print "\nupgradetau: This script is provided to rebuild all TAU configurations\n";
    print "            previously built in a different TAU source directory.\n";
    die "\nusage: $0 <path/to/old/tau> [extra args]\n";
}

$oldTAU = $ARGV[0];

$remainingArgs = "";
for $i (1 .. $#ARGV) {
    $remainingArgs = $remainingArgs . $ARGV[$i];
}

$oldConfigs = "$oldTAU/.all_configs";

if (! -r $oldConfigs ) {
    die "Unable to find $oldConfigs\n";
}

print "\n-= Upgrading TAU =-\n";
print "Reading configurations from $oldConfigs\n";


# determine the available options
@availableOpts = `./configure -fullhelp | grep "^-" | awk '{print \$1}' | sed s/=.*//g`;

foreach $opt (@availableOpts) {
    chomp($opt);
    $opts{$opt} = 1;
} 

$opts{"-setnode0"} = 1;
$opts{"-PROFILECALLS"} = 1;
$opts{"-pdtcompdir"} = 1;

# read .all_configs at once in case the user is running it using the
# current directory as the old tau
@allConfigs = `cat $oldConfigs`;

foreach $config (@allConfigs) {
    chomp($config);
    @oldopts = split(' ', $config);

    $newline = "";
    $newopt = "";

    foreach $opt (@oldopts) {

	# remove leading and trailing whitespace
	$opt =~ s/^\s+//;
	$opt =~ s/\s+$//;

	# get the base option (e.g. -mpiinc for -mpiinc=/usr/local/...)
	$base = $opt;
	$base =~ s/=.*//g;

	if ($opts{$base} == 1) { 
            # if it matches an option from `configure -help`
	    # then append previous fragments ($newopt) as the previous option
	    # and restart $newopt
	    if (!($newopt eq "")) {
		if ($newopt =~ / /) {
		    $newline = $newline . '"' . $newopt . '" ';
		} else {
		    $newline = $newline . ' ' . $newopt . ' ';
		}
	    }
	    $newopt = $opt;
	} else { 
            # no match, add to $newopt
	    $newopt = $newopt . " " . $opt;

	    # remove leading and trailing whitespace
	    $newopt =~ s/^\s+//;
	    $newopt =~ s/\s+$//;
	}
    }

    # flush the last option
    if (!($newopt eq "")) {
	if ($newopt =~ / /) {
	    $newline = $newline . '"' . $newopt . '" ';
	} else {
	    $newline = $newline . ' ' . $newopt . ' ';
	}
    }
    
    if ($newline =~ /-help/) {
	# skip -help
    } else {
	print "Configuring TAU with: $newline\n";

	$rc = 0xffff & system("./configure $newline $remainingArgs");
	if ($rc == 2) { # SIGINT
	    # kill all children
	    local $SIG{HUP} = 'IGNORE'; 
	    kill HUP => -$$;
	    print "\nkilled\n";
	    exit;
	}
	$rc = 0xffff & system("make clean install");
	if ($rc == 2) { # SIGINT
	    # kill all children
	    local $SIG{HUP} = 'IGNORE'; 
	    kill HUP => -$$;
	    print "\nkilled\n";
	    exit;
	}
    }
}
close(FD);