#!/usr/bin/perl -w
#
# Attempt to build RPMs for Freeside from a tarball or module
#
# Contains portions of "cpanspec" http://cpanspec.sourceforge.net/

=head1 NAME

enrpm - Attempt to build RPMs for Freeside from a tarball or a module

=head1 SYNOPSIS

enrpm [options] [tarball|module-name [...]]

 Options:
   --help       -h      Help message

=head1 DESCRIPTION

B<enrpm> will generate a spec file to build a rpm from a CPAN-style
Perl module distribution, then try to build RPMs from that spec file
under mock, and update the repositories if successful.

B<enrpm> uses the file extension of the tarball or module-name specified
on the command line to determine if the argument is a tarball or a module name.

Modules are downloaded from the CPAN.  You must have initialized CPAN on the machine
for B<enrpm> to be able to do this.

For tarballs B<enrpm> attempts to build a usable .spec file using cpanflute2, and then builds
an SRPM from the .spec file and the tarball.

Once an SRPM has been built, B<enrpm> uses an external script to build binary RPMs under "mock".
It then uses a second script to update the repositories.

=head1 OPTIONS

=over 4

=item B<--help>

Print a brief help message and exit.

=item B<--packager>

Specify the name and e-mail address of the packager.  This winds up in auto-generated .spec files.

=item B<--server>

Specify the host name or IP address of the server on which the SRPM will be built.  This server must be
set up for SRPM building, which means it must have both B<ovid> and B<cpanflute2> installed on it.

=item B<--dry-run>

Just print out commands, don't actually run them.

=back

=head1 BUGS

Currently has little in the way of error detection and diagnostics.

The back-end should be replaced with an existing build system such as koji.

=head1 AUTHOR

Richard Siddall <richard.siddall@elirion.net>

=head1 SEE ALSO

L<perl(1)>, L<cpan2rpm(1)>, L<cpanflute2(1)>

=cut

use strict;
use Getopt::Long;
use Cwd qw/getcwd abs_path/;
use File::Basename;
use Sys::Hostname; # False laziness to get around a real config file...

my %opts;

GetOptions(\%opts, 'packager=s', 'release=s', 'server=s', 'dryrun');

$ENV{PATH} = "/bin:/usr/bin";

sub usage {
	print STDERR "usage: enrpm --packager <Your Name <you\@example.com>> [--release=<rpm-release-string>] --server <server-name> [--dryrun] tarball|module-name\n";
	print STDERR "where:\n\t--packager is the name and e-mail address of the packager for the .spec file\n\t--release is the rpm release number for the .spec file\n\t--server is the server to build the SRPM on\n\t--dryrun means do not actually run the commands\n\n";
	print STDERR "\ttarball is the name of a tarball containing the Perl module to be packaged\n";
	print STDERR "\tmodule-name is the name of a CPAN Perl module to be packaged\n";
	exit;
}

# Feeble excuse for not having a real configuration file
my $user = 'rsiddall';
my $buildsys = '/home/rsiddall/work';
my $rembuild = '/home/rsiddall/work/cvs';
my $remdeps = '/home/rsiddall';
my $rpmtopdir = '/home/rsiddall/work/redhat';
my $packager = 'Richard Siddall <richard.siddall@elirion.net>';
my $server = 'grosbeak';

if (hostname =~ /wavetail/i) {
	$buildsys = '/home/rsiddall/buildsys';
	$rembuild = '/home/rsiddall/buildsys/ref';
	$remdeps = '/home/rsiddall';
	$rpmtopdir = '/home/rsiddall/redhat';
	$packager = 'Ivan Kohler <ivan@freeside.biz>';
	$server = '10.5.4.5';
}

$server = $opts{server} if defined($opts{server});
$user = $1 if $server =~ /(\w+)\@[\w\d\.]+/;

$packager = $opts{packager} if defined($opts{packager});

# Go ahead and build an SRPM...

my $ovidignore = '--ignore ' . join ('--ignore ', qw/libwww/);


for my $file (@ARGV) {
	my ($name,$version,$type);

	if ($file =~ /^(?:.*\/)?(.*)-(?:v\.?)?([^-]+)\.(tar)\.(?:gz|bz2)$/) {
		$name = $1;
		$version = $2;
		$type = $3;
	} elsif ($file =~ /^(?:.*\/)?(.*)-(?:v\.?)?([^-]+)\.tgz$/) {
		$name = $1;
		$version = $2;
		$type = 'tar';
	} elsif ($file =~ /^(?:.*\/)?(.*)-(?:v\.?)?([^-]+)\.(zip)$/) {
		$name = $1;
		$version = $2;
		$type = $3;
	} else {
		# keep things happy if we get "Foo-Bar" instead of "Foo::Bar"
		$file =~ s/-/::/g;
		$name = $file;
		$version = undef;
		$type = 'module';
	}

	if ($type eq 'module') {
		my $fluteopts = '';
		$fluteopts .= "--packager='$packager' " if defined($packager);
		$fluteopts .= "--release='$opts{release}' " if defined($opts{release});
		do_cmd("ssh $user\@$server \"ovid --deps $ovidignore $name | tail -1 | $remdeps/ovid2flute $fluteopts | /bin/sh\"");
	} else {
		my $absfile = abs_path($file);
		my $fname = basename($file);
		die "Packager name and e-mail required" if !defined($packager);
		die "RPM release string required" if !defined($opts{release});
		do_cmd("scp $absfile $user\@$server:/home/$user/$fname");
#		do_cmd("ssh $user\@$server 'cpanflute2 --just-spec --noperlreqs --email=\\\"$packager\\\" --release=$opts{release}  /home/$user/$fname > /home/$user/work/redhat/SPECS/$name.spec;'");
#		do_cmd("ssh $user\@$server 'perl -pi -e \\\"s/perl\(perl\)/perl/g\\\" /home/$user/work/redhat/SPECS/$name.spec;'");
#		do_cmd("ssh $user\@$server 'rpmbuild -bs --nodeps --define \\\"_sourcedir /home/$user/\\\" --define \\\"_srcrpmdir /home/$user/work/redhat/SRPMS\\\" /home/$user/work/redhat/SPECS/$name.spec'");
		open SCRIPT, ">/home/$user/makesrpm" or die "Can't create SRPM construction script: ", $!;
		print SCRIPT "#!/bin/sh\n\n";
		print SCRIPT "cpanflute2 --just-spec --noperlreqs --email='$packager' --release=$opts{release}  /home/$user/$fname > $rpmtopdir/SPECS/$name.spec;\n";
		print SCRIPT "perl -pi -e 's/perl(perl)/perl/g' $rpmtopdir/SPECS/$name.spec\n";
		print SCRIPT "rpmbuild -bs --nodeps --define '_sourcedir /home/$user/' --define '_srcrpmdir $rpmtopdir/SRPMS' $rpmtopdir/SPECS/$name.spec\n";
		close SCRIPT or die "Can't close SRPM construction script: ", $!;
		chmod(0711, "/home/$user/makesrpm");
		do_cmd("scp /home/$user/makesrpm $user\@$server:/home/$user/makesrpm");
		do_cmd("ssh $user\@$server /home/$user/makesrpm");
	}
	my $olddir = getcwd();
	do_cmd("$buildsys/build-freeside");
	if (-x "$buildsys/refresh-repo") {
		do_cmd("$buildsys/refresh-repo");
	} else {
		do_cmd("ssh $user\@$server $rembuild/refresh-repo");
	}
}

sub do_cmd {
	my $cmd = shift;

	print "$cmd\n";
	`$cmd` if !exists($opts{dryrun});
}

1;