#!/usr/bin/perl -w

# Build an RPM. Usage:
#   rpmbuild.pl [lib path]
use strict;
use warnings;
use File::Copy;
use Template;
use lib "./lib";
use RiveScript; # So we get its version no.
use RiveScript::WD;

# Use the pwd command to get the current working directory.
my $pwd = `pwd`;
chomp($pwd);

# Build number = today's date.
my @time = localtime();
my $build = join("",
	sprintf("%04d", $time[5] + 1900),
	sprintf("%02d", $time[4] + 1),
	sprintf("%02d", $time[3]),
);

print "Preparing build root...\n";
makedir("./build", "./build/usr");
command("perl Makefile.PL PREFIX=build/usr");
command("make");
command("make test");
command("make install");

print "Copying utils from bin/...\n";
makedir("./build/usr/bin");
copy("./bin/rivescript", "./build/usr/bin/");

print "\n";

print "Preparing Template Toolkit...\n";
my $tt = Template->new ({
	RELATIVE   => 1,
	PRE_CHOMP  => 0,
	POST_CHOMP => 0,
});
my $vars = {
	version     => $RiveScript::VERSION,
	build       => $build,
	wd_version  => $RiveScript::WD::VERSION,
	files       => [],
};

print "Making file list from buildroot...\n";
my @flist = &crawl("./build");
foreach my $file (@flist) {
	$file =~ s/^\.\/build//i;
	if ($file =~ /rpmbuild\.pl$/ || $file =~ /perllocal\.pod$/ || $file =~ /\.packlist$/) {
		unlink("./build/$file");
		next;
	}
	my $attr = "0644";
	if (-d $file || $file =~ /^\/usr\/bin/i) {
		$attr = "0755";
	}
	push (@{$vars->{files}}, "%attr($attr,root,root) $file");
}

print "Creating RPM spec file...\n";
my $output;
eval {
	$tt->process("./perl-RiveScript.spec.tt", $vars, \$output) or die $@;
};
if ($@) {
	die $@;
}
open (SPEC, ">perl-RiveScript.spec");
print SPEC $output;
close (SPEC);

print "Building RPM...\n";
command("rpmbuild --target=noarch --buildroot=$pwd/build -ba perl-RiveScript.spec");

print "Cleaning up...\n";
command("make clean");
command("rm -rf build/");
unlink("./perl-RiveScript.spec");

sub command {
	my $cmd = shift;
	print "\$ $cmd\n";
	system($cmd);
}

sub crawl {
	my $dir = shift;

	my @files = ();

	opendir (DIR, $dir);
	foreach my $file (readdir(DIR)) {
		next if $file eq ".";
		next if $file eq "..";
		if (-d "$dir/$file") {
			push (@files, &crawl("$dir/$file"));
		}
		else {
			push (@files, "$dir/$file");
		}
	}

	return @files;
}

sub makedir {
	my @dirs = @_;
	foreach my $d (@dirs) {
		print "mkdir $d\n";
		mkdir($d) unless -d $d;
	}
}

sub prompt {
	my $q = shift;
	print "$q ";
	chomp (my $answer = <STDIN>);
	return $answer;
}