debian-cd-clone/squeeze/tools/which_deb

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2011-02-05 08:42:04 -01:00
#!/usr/bin/perl -w
#
# which_deb
#
# Simple helper tool to find the appropriate version of a package in
# the archive to meet a requirement in the debian-cd build
use strict;
use List::Util qw{first};
# Give prefernce to i386 and amd64, if specified, or if building a
# source-only CD.
my @ARCHES;
if ( $ENV{ARCHES} ) {
push @ARCHES, 'i386' if $ENV{ARCHES} =~ /i386/;
push @ARCHES, 'amd64' if $ENV{ARCHES} =~ /amd64/;
push @ARCHES, grep { !/source|i386|amd64/ } split /\s+/, $ENV{ARCHES};
}
@ARCHES = qw{i386 amd64} unless @ARCHES;
my ($mirror, $codename, $pkg, $pth, $output);
$mirror = shift;
$codename = shift;
$pkg = shift;
$output = shift;
$pth = "$mirror/dists/$codename";
my @components = qw(main);
push @components, 'contrib' if $ENV{CONTRIB};
push @components, 'non-free' if $ENV{NONFREE};
push @components, 'local' if $ENV{LOCAL};
if (!defined ($output)) {
$output = "binary";
}
sub grab_bin_info {
my $pth = shift;
my $arch = shift;
my $pkgname = shift;
my $old_split = $/;
my $match;
my $result = "";
$/ = ''; # Browse by paragraph
for my $component ( @components ) {
my $pgz = "$pth/$component/binary-$arch/Packages.gz";
if ( $component eq 'local' and $ENV{LOCALDEBS} ) {
$pgz = "$ENV{LOCALDEBS}/dists/$codename/local/binary-$arch/Packages.gz";
}
if (-e $pgz) {
open(PFILE, "zcat $pgz |") or
die "Failed to read Packages file $pgz";
while (defined($match = <PFILE>)) {
if (($match =~ /^Package: \Q$pkgname\E$/m)) {
$result = $match;
close PFILE;
return $result;
}
}
# Fell through
close PFILE;
}
}
return "";
}
sub grab_src_info {
my $pth = shift;
my $pkgname = shift;
my $old_split = $/;
my $match;
my $result = "";
$/ = ''; # Browse by paragraph
for my $component ( @components ) {
my $pgz = "$pth/$component/source/Sources.gz";
if (-e $pgz) {
open(PFILE, "zcat $pgz |") or
die "Failed to read Sources file $pgz";
while (defined($match = <PFILE>)) {
if (($match =~ /^Package: \Q$pkgname\E$/m)) {
$result = $match;
close PFILE;
return $result;
}
}
# Fell through
close PFILE;
}
}
return "";
}
my $bin_deb = "";
my $pkgdata = "";
my $srcname = "";
if ($pkg eq "silo") {
$pkgdata = grab_bin_info($pth, "sparc", $pkg);
} elsif ($pkg eq "syslinux") {
first { $pkgdata = grab_bin_info($pth, $_, "syslinux-common") } @ARCHES;
if (length($pkgdata) < 3) {
first { $pkgdata = grab_bin_info($pth, $_, "syslinux") } @ARCHES;
}
} elsif ($pkg eq "yaboot") {
$pkgdata = grab_bin_info($pth, "powerpc", $pkg);
} else { # Fallthrough for all other packages
first { $pkgdata = grab_bin_info($pth, $_, $pkg) } @ARCHES;
}
if (length($pkgdata) > 2) {
if ($output eq "binary") {
$pkgdata =~ m/^Filename: (\S+)/m and $bin_deb = $1;
print "$bin_deb\n";
}
elsif ($output eq "source") {
$srcname = $pkg;
$pkgdata =~ m/^Source: (\S+)/m and $srcname = $1;
$pkgdata = grab_src_info($pth, $srcname);
if (length($pkgdata) > 2) {
my $dir;
$pkgdata =~ m/^Directory: (\S+)/m and $dir = $1;
$pkgdata =~ m/^ (\S+) (\S+) ((\S+).*dsc)/m and print "$dir/$3\n";
$pkgdata =~ m/^ (\S+) (\S+) ((\S+).*diff.gz)/m and print "$dir/$3\n";
$pkgdata =~ m/^ (\S+) (\S+) ((\S+).*tar.gz)/m and print "$dir/$3\n";
}
}
}