Initial Commit

1 files changed, 295 insertions, 0 deletions

diff --git a/dpkg-scanpackages b/dpkg-scanpackages
new file mode 100644
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+++ b/dpkg-scanpackages
@@ -0,0 +1,295 @@
+#!/usr/bin/perl
+#
+# dpkg-scanpackages
+#
+# Copyright © 2006-2015 Guillem Jover <guillem@debian.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+use warnings;
+use strict;
+
+use Getopt::Long qw(:config posix_default bundling no_ignorecase);
+use File::Find;
+
+use Dpkg ();
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+use Dpkg::Util qw(:list);
+use Dpkg::Control;
+use Dpkg::Version;
+use Dpkg::Checksums;
+use Dpkg::Compression::FileHandle;
+
+textdomain('dpkg-dev');
+
+# Do not pollute STDOUT with info messages
+report_options(info_fh => \*STDERR);
+
+my (@samemaint, @changedmaint);
+my @spuriousover;
+my %packages;
+my %overridden;
+my %hash;
+
+my %options = (help            => sub { usage(); exit 0; },
+	       version         => sub { version(); exit 0; },
+	       type            => undef,
+	       arch            => undef,
+	       hash            => undef,
+	       multiversion    => 0,
+	       'extra-override'=> undef,
+               medium          => undef,
+	      );
+
+my @options_spec = (
+    'help|?',
+    'version',
+    'type|t=s',
+    'arch|a=s',
+    'hash|h=s',
+    'multiversion|m!',
+    'extra-override|e=s',
+    'medium|M=s',
+);
+
+sub version {
+    printf g_("Debian %s version %s.\n"), $Dpkg::PROGNAME, $Dpkg::PROGVERSION;
+}
+
+sub usage {
+    printf g_(
+"Usage: %s [<option>...] <binary-path> [<override-file> [<path-prefix>]] > Packages
+
+Options:
+  -t, --type <type>        scan for <type> packages (default is 'deb').
+  -a, --arch <arch>        architecture to scan for.
+  -h, --hash <hash-list>   only generate hashes for the specified list.
+  -m, --multiversion       allow multiple versions of a single package.
+  -e, --extra-override <file>
+                           use extra override file.
+  -M, --medium <medium>    add X-Medium field for dselect multicd access method
+  -?, --help               show this help message.
+      --version            show the version.
+"), $Dpkg::PROGNAME;
+}
+
+sub load_override
+{
+    my $override = shift;
+    my $comp_file = Dpkg::Compression::FileHandle->new(filename => $override);
+
+    while (<$comp_file>) {
+	s/\#.*//;
+	s/\s+$//;
+	next unless $_;
+
+	my ($p, $priority, $section, $maintainer) = split(/\s+/, $_, 4);
+
+	if (not defined($packages{$p})) {
+	    push(@spuriousover, $p);
+	    next;
+	}
+
+	for my $package (@{$packages{$p}}) {
+	    if ($maintainer) {
+		if ($maintainer =~ m/(.+?)\s*=\>\s*(.+)/) {
+		    my $oldmaint = $1;
+		    my $newmaint = $2;
+		    my $debmaint = $$package{Maintainer};
+		    if (none { $debmaint eq $_ } split m{\s*//\s*}, $oldmaint) {
+			push(@changedmaint,
+			     sprintf(g_('  %s (package says %s, not %s)'),
+			             $p, $$package{Maintainer}, $oldmaint));
+		    } else {
+			$$package{Maintainer} = $newmaint;
+		    }
+		} elsif ($$package{Maintainer} eq $maintainer) {
+		    push(@samemaint, "  $p ($maintainer)");
+		} else {
+		    warning(g_('unconditional maintainer override for %s'), $p);
+		    $$package{Maintainer} = $maintainer;
+		}
+	    }
+	    $$package{Priority} = $priority;
+	    $$package{Section} = $section;
+	}
+	$overridden{$p} = 1;
+    }
+
+    close($comp_file);
+}
+
+sub load_override_extra
+{
+    my $extra_override = shift;
+    my $comp_file = Dpkg::Compression::FileHandle->new(filename => $extra_override);
+
+    while (<$comp_file>) {
+	s/\#.*//;
+	s/\s+$//;
+	next unless $_;
+
+	my ($p, $field, $value) = split(/\s+/, $_, 3);
+
+	next unless defined($packages{$p});
+
+	for my $package (@{$packages{$p}}) {
+	    $$package{$field} = $value;
+	}
+    }
+
+    close($comp_file);
+}
+
+sub process_deb {
+    my ($pathprefix, $fn) = @_;
+
+    my $fields = Dpkg::Control->new(type => CTRL_INDEX_PKG);
+
+    open my $output_fh, '-|', 'dpkg-deb', '-I', $fn, 'control'
+        or syserr(g_('cannot fork for %s'), 'dpkg-deb');
+    $fields->parse($output_fh, $fn)
+        or error(g_("couldn't parse control information from %s"), $fn);
+    close $output_fh;
+    if ($?) {
+        warning(g_("'dpkg-deb -I %s control' exited with %d, skipping package"),
+                $fn, $?);
+        return;
+    }
+
+    my $p = $fields->{'Package'};
+    error(g_('no Package field in control file of %s'), $fn)
+        if not defined $p;
+
+    if (defined($packages{$p}) and not $options{multiversion}) {
+        foreach my $pkg (@{$packages{$p}}) {
+            if (version_compare_relation($fields->{'Version'}, REL_GT,
+                                         $pkg->{'Version'}))
+            {
+                warning(g_('package %s (filename %s) is repeat but newer ' .
+                           'version; used that one and ignored data from %s!'),
+                        $p, $fn, $pkg->{Filename});
+                $packages{$p} = [];
+            } else {
+                warning(g_('package %s (filename %s) is repeat; ' .
+                           'ignored that one and using data from %s!'),
+                        $p, $fn, $pkg->{Filename});
+                return;
+            }
+        }
+    }
+
+    warning(g_('package %s (filename %s) has Filename field!'), $p, $fn)
+        if defined($fields->{'Filename'});
+    $fields->{'Filename'} = "$pathprefix$fn";
+
+    my $sums = Dpkg::Checksums->new();
+    $sums->add_from_file($fn);
+    foreach my $alg (checksums_get_list()) {
+        next if %hash and not $hash{$alg};
+
+        if ($alg eq 'md5') {
+            $fields->{'MD5sum'} = $sums->get_checksum($fn, $alg);
+        } else {
+            $fields->{$alg} = $sums->get_checksum($fn, $alg);
+        }
+    }
+    $fields->{'Size'} = $sums->get_size($fn);
+    $fields->{'X-Medium'} = $options{medium} if defined $options{medium};
+
+    push @{$packages{$p}}, $fields;
+}
+
+{
+    local $SIG{__WARN__} = sub { usageerr($_[0]) };
+    GetOptions(\%options, @options_spec);
+}
+
+if (not (@ARGV >= 1 and @ARGV <= 3)) {
+    usageerr(g_('one to three arguments expected'));
+}
+
+my $type = $options{type} // 'deb';
+my $arch = $options{arch};
+%hash = map { $_ => 1 } split /,/, $options{hash} // '';
+
+foreach my $alg (keys %hash) {
+    if (not checksums_is_supported($alg)) {
+        usageerr(g_('unsupported checksum \'%s\''), $alg);
+    }
+}
+
+my ($binarypath, $override, $pathprefix) = @ARGV;
+
+if (not -e $binarypath) {
+    error(g_('binary path %s not found'), $binarypath);
+}
+if (defined $override and not -e $override) {
+    error(g_('override file %s not found'), $override);
+}
+
+$pathprefix //= '';
+
+my $find_filter;
+if ($options{arch}) {
+    $find_filter = qr/_(?:all|${arch})\.$type$/;
+} else {
+    $find_filter = qr/\.$type$/;
+}
+my @archives;
+my $scan_archives = sub {
+    push @archives, $File::Find::name if m/$find_filter/;
+};
+
+find({ follow => 1, follow_skip => 2, wanted => $scan_archives}, $binarypath);
+foreach my $fn (@archives) {
+    process_deb($pathprefix, $fn);
+}
+
+load_override($override) if defined $override;
+load_override_extra($options{'extra-override'}) if defined $options{'extra-override'};
+
+my @missingover=();
+
+my $records_written = 0;
+for my $p (sort keys %packages) {
+    if (defined($override) and not defined($overridden{$p})) {
+        push @missingover, $p;
+    }
+    for my $package (sort { $a->{Version} cmp $b->{Version} } @{$packages{$p}}) {
+         print("$package\n") or syserr(g_('failed when writing stdout'));
+         $records_written++;
+    }
+}
+close(STDOUT) or syserr(g_("couldn't close stdout"));
+
+if (@changedmaint) {
+    warning(g_('Packages in override file with incorrect old maintainer value:'));
+    warning($_) foreach (@changedmaint);
+}
+if (@samemaint) {
+    warning(g_('Packages specifying same maintainer as override file:'));
+    warning($_) foreach (@samemaint);
+}
+if (@missingover) {
+    warning(g_('Packages in archive but missing from override file:'));
+    warning('  %s', join(' ', @missingover));
+}
+if (@spuriousover) {
+    warning(g_('Packages in override file but not in archive:'));
+    warning('  %s', join(' ', @spuriousover));
+}
+
+info(g_('Wrote %s entries to output Packages file.'), $records_written);