#!/usr/bin/perl -w
#
# Copyright (c) 2000 Neil Blakey-Milner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

use strict;

use Getopt::Std qw( getopts );

my ($initdir, $distname);
my ($makefile, $wrksrc);
my ($portname, $portversion);
my (%cap); # persistent version of the make variables
my (%tmp); # temporary version of the make variables

chomp($initdir = `pwd`);

getopts('o');

#&usage if $#ARGV != 0;

&initmk;
&chk_scripts;
chdir($initdir);
open(MAKEFILE, ">Makefile.extr");
&writemk;

exit;

sub nl {
	print MAKEFILE "\n";
}

sub writeiffound {
	my($var) = (@_);

	if ($tmp{"$var"}) {
		print MAKEFILE "$var=\t". $tmp{$var} . "\n";
		delete($tmp{$var});
		return 1;
	}
	return 0;
}

sub appendvar {
	my ($var, $item) = (@_);

	if ($tmp{$var}) {
		$tmp{$var} .= "\t\\\n\t\t$item";
	} else {
		$tmp{$var} = "$item";
	}
}

sub writemk {

	my (@freeform);

	my ($key);

	foreach $key (keys %cap) {
		$tmp{$key} = $cap{$key};
	}

	foreach $key (keys %tmp) {
		if ($tmp{"USE_KDE"}) {
			appendvar("LIB_DEPENDS",
				"kdecore.4:\${PORTSDIR}/x11/kdelibs2");
			delete($tmp{"USE_KDE"});
		}

		if ($tmp{"USE_GNOME"}) {
			appendvar("LIB_DEPENDS",
				"gnome.4:\${PORTSDIR}/x11/gnomelibs");
			delete($tmp{"USE_GNOME"});
		}

		if ($tmp{"USE_GTK"}) {
			appendvar("LIB_DEPENDS",
				"gtk12.2:\${PORTSDIR}/x11-toolkits/gtk12");

			$tmp{"GTK_CONFIG"} =
				"\${LOCALBASE}/bin/gtk12-config";

			appendvar("CONFIGURE_ENV",
					"GTK_CONFIG=\"\${GTK_CONFIG}\"");

			delete($tmp{"USE_GTK"});
		}
	}

	my ($date);
	chomp($date = `date +"\%d \%b \%Y"`);

	nl if writeiffound("LIB_DEPENDS");

	nl if (writeiffound("GNU_CONFIGURE") +
		writeiffound("HAS_CONFIGURE") +
		writeiffound("CONFIGURE_ARGS") +
		writeiffound("CONFIGURE_ENV"));

	#second group
	foreach $key (keys %tmp) {
		my($tmp) = $tmp{$key};
		print MAKEFILE "$key=\t$tmp\n";
	}

	print MAKEFILE @freeform;

	print MAKEFILE "\n.include <bsd.port.mk>\n";	
	close (MAKEFILE);
}

sub initmk {
	chomp($portname = `make -V PORTNAME`);
	chomp($portversion = `make -V PORTVERSION`);
	`make extract`;
}

sub getwrksrc {
	my (@files);
	my ($wrkdir);
	$wrkdir = "work";
	chdir ($initdir);
	chdir ($wrkdir);

	if (-d "$portname-$portversion") {
		$wrksrc = $wrkdir . "$portname-$portversion";
		chdir ("$portname-$portversion");
		return;
	}

	opendir(DIR, ".");
	@files = grep { ! /^\./ } readdir(DIR);
	closedir DIR;
	if ($#files > 1) { # more than one entry in dir
		$cap{"NO_WRKSUBDIR"} = "YES";
		$wrksrc = $wrkdir;
	} else { # just one, so change to directory
		$cap{"WRKSRC"} = '${WRKDIR}/' . $files[0];
		$wrksrc = $wrkdir . $files[0];
		chdir ($files[0]);
	}
}

sub getmkfile {
	if ((! -f "Makefile")) {
		if (-f "Makefile.in") {
			$makefile = "Makefile.in";
		} elsif (-f "makefile") {
			$cap{"MAKEFILE"} = "makefile";
			$makefile = "makefile";
		} elsif (-f "GNUmakefile") {
			$cap{"MAKEFILE"} = "GNUmakefile";
			$cap{"USE_GMAKE"} = "YES";
			$makefile = "GNUmakefile";
		} else {
			print STDERR "No Makefile!\n";
			$cap{"NO_BUILD"} = "YES";
			$cap{"NO_INSTALL"} = "YES";
		}
	} else {
		$makefile = "Makefile";
	}
}

sub gettargets {
	my($targets);
	$targets = "";
	$targets = `make -f $makefile -dg1 -q | grep "^[^.#][-_.a-zA-Z ]*:" | awk "{\$1}"` if defined($makefile);
	print $targets;
}

sub getconfinfo {
	if (-f "configure") { # ooh, but HAS_CONFIGURE or GNU_CONFIGURE?
		if (`./configure --version` =~ /autoconf/) {
			$cap{"GNU_CONFIGURE"} = "YES";
			$cap{"USE_QT"} = "YES" if (`./configure --help | grep -Fe --with-qt`);
			$cap{"USE_GTK"} = "YES" if (`./configure --help | grep -Fe --with-gtk`);
			$cap{"USE_GNOME"} = "YES" if (`./configure --help | grep -Fe --with-gnome`);
			$cap{"USE_KDE"} = "YES" if (`grep -F "checking for KDE" configure`);
			$cap{"USE_OPENSSL"} = "MUST" if (`grep -F 'configure: error: --with-openssl must be specified' configure`);
			$cap{"USE_OPENSSL"} = "OPTIONAL" if ( (`grep -F 'configure: error: "OpenSSL not in ' configure`) && !($cap{"USE_OPENSSL"}) );
		} else {
			$cap{"HAS_CONFIGURE"} = "YES";
		}
	} else { # maybe they expect us to build configure for them?!
		if (-f "configure.in") {
			$cap{"USE_AUTOCONF"} = "YES";
		} elsif (-f "Configure") {
			$cap{"HAS_CONFIGURE"} = "YES";
			$cap{"CONFIGURE_SCRIPT"} = "Configure";
		}
	}

	if (!$cap{"USE_QT"}) { # haven't seen QT yet, let's try some more
		if ($cap{"USE_KDE"}) {
			$cap{"USE_QT"} = "YES";
		} elsif (-f "automoc") {
			$cap{"USE_QT"} = "YES";
		} elsif (-d "moc") {
			$cap{"USE_QT"} = "YES";
		} elsif (defined($makefile) && -f $makefile && `grep -F -e -lqt $makefile`) { # more insane.
			$cap{"USE_QT"} = "YES";
		}
	}
}

sub chk_scripts {
	&getwrksrc;
	&getmkfile;
	#&gettargets;

	&getconfinfo;

	if (-f "ltconfig") {
		$cap{"USE_LIBTOOL"} = "YES";
	}

	if (-f "Imakefile") {
		$cap{"USE_IMAKE"} = "YES";
	}
}

sub usage {
	print STDERR <<"EOF";
usage: $0 filename

	generates a ports skeleton for port based on filename

EOF
	exit;
}