# Copyright © 2008-2009 Raphaël Hertzog # Copyright © 2008-2009, 2012-2017, 2022 Guillem Jover # # 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 . =encoding utf8 =head1 NAME Dpkg::Vendor - get access to some vendor specific information =head1 DESCRIPTION The files in $Dpkg::CONFDIR/origins/ can provide information about various vendors who are providing Debian packages. Currently those files look like this: Vendor: Debian Vendor-URL: https://www.debian.org/ Bugs: debbugs://bugs.debian.org If the vendor derives from another vendor, the file should document the relationship by listing the base distribution in the Parent field: Parent: Debian The file should be named according to the vendor name. The usual convention is to name the vendor file using the vendor name in all lowercase, but some variation is permitted. Namely, spaces are mapped to dashes ('-'), and the file can have the same casing as the Vendor field, or it can be capitalized. =cut package Dpkg::Vendor 1.02; use strict; use warnings; use feature qw(state); our @EXPORT_OK = qw( get_current_vendor get_vendor_info get_vendor_file get_vendor_dir get_vendor_object run_vendor_hook ); use Exporter qw(import); use List::Util qw(uniq); use Dpkg (); use Dpkg::ErrorHandling; use Dpkg::Gettext; use Dpkg::BuildEnv; use Dpkg::Control::HashCore; my $origins = "$Dpkg::CONFDIR/origins"; $origins = $ENV{DPKG_ORIGINS_DIR} if $ENV{DPKG_ORIGINS_DIR}; =head1 FUNCTIONS =over 4 =item $dir = get_vendor_dir() Returns the current dpkg origins directory name, where the vendor files are stored. =cut sub get_vendor_dir { return $origins; } =item $fields = get_vendor_info($name) Returns a L object with the information parsed from the corresponding vendor file in $Dpkg::CONFDIR/origins/. If $name is omitted, it will use $Dpkg::CONFDIR/origins/default which is supposed to be a symlink to the vendor of the currently installed operating system. Returns undef if there's no file for the given vendor. =cut my $vendor_sep_regex = qr{[^A-Za-z0-9]+}; sub get_vendor_info(;$) { my $vendor = shift || 'default'; my $vendor_key = lc $vendor =~ s{$vendor_sep_regex}{}gr; state %VENDOR_CACHE; return $VENDOR_CACHE{$vendor_key} if exists $VENDOR_CACHE{$vendor_key}; my $file = get_vendor_file($vendor); return unless $file; my $fields = Dpkg::Control::HashCore->new(); $fields->load($file, compression => 0) or error(g_('%s is empty'), $file); $VENDOR_CACHE{$vendor_key} = $fields; return $fields; } =item $name = get_vendor_file($name) Check if there's a file for the given vendor and returns its name. The vendor filename will be derived from the vendor name, by replacing any number of non-alphanumeric characters (that is B<[^A-Za-z0-9]>) into "B<->", then the resulting name will be tried in sequence by lower-casing it, keeping it as is, lower-casing then capitalizing it, and capitalizing it. In addition, for historical and backwards compatibility, the name will be tried keeping it as is without non-alphanumeric characters remapping, then the resulting name will be tried in sequence by lower-casing it, keeping it as is, lower-casing then capitalizing it, and capitalizing it. And finally the name will be tried by replacing only spaces to "B<->", then the resulting name will be tried in sequence by lower-casing it, keeping it as is, lower-casing then capitalizing it, and capitalizing it. But these backwards compatible name lookups will be removed during the dpkg 1.22.x release cycle. =cut sub get_vendor_file(;$) { my $vendor = shift || 'default'; my @names; my $vendor_sep = $vendor =~ s{$vendor_sep_regex}{-}gr; push @names, lc $vendor_sep, $vendor_sep, ucfirst lc $vendor_sep, ucfirst $vendor_sep; # XXX: Backwards compatibility, remove on 1.22.x. my %name_seen = map { $_ => 1 } @names; my @obsolete_names = uniq grep { my $seen = exists $name_seen{$_}; $name_seen{$_} = 1; not $seen; } ( (lc $vendor, $vendor, ucfirst lc $vendor, ucfirst $vendor), ($vendor =~ s{\s+}{-}g) ? (lc $vendor, $vendor, ucfirst lc $vendor, ucfirst $vendor) : () ); my %obsolete_name = map { $_ => 1 } @obsolete_names; push @names, @obsolete_names; foreach my $name (uniq @names) { next unless -e "$origins/$name"; if (exists $obsolete_name{$name}) { warning(g_('%s origin filename is deprecated; ' . 'it should have only alphanumeric or dash characters'), $name); } return "$origins/$name"; } return; } =item $name = get_current_vendor() Returns the name of the current vendor. If DEB_VENDOR is set, it uses that first, otherwise it falls back to parsing $Dpkg::CONFDIR/origins/default. If that file doesn't exist, it returns undef. =cut sub get_current_vendor() { my $f; if (Dpkg::BuildEnv::has('DEB_VENDOR')) { $f = get_vendor_info(Dpkg::BuildEnv::get('DEB_VENDOR')); return $f->{'Vendor'} if defined $f; } $f = get_vendor_info(); return $f->{'Vendor'} if defined $f; return; } =item $object = get_vendor_object($name) Return the Dpkg::Vendor::* object of the corresponding vendor. If $name is omitted, return the object of the current vendor. If no vendor can be identified, then return the L object. The module name will be derived from the vendor name, by splitting parts around groups of non alphanumeric character (that is B<[^A-Za-z0-9]>) separators, by either capitalizing or lower-casing and capitalizing each part and then joining them without the separators. So the expected casing is based on the one from the B field in the F file. In addition, for historical and backwards compatibility, the module name will also be looked up without non-alphanumeric character stripping, by capitalizing, lower-casing then capitalizing, as-is or lower-casing. But these name lookups will be removed during the 1.22.x release cycle. =cut sub get_vendor_object { my $vendor = shift || get_current_vendor() || 'Default'; my $vendor_key = lc $vendor =~ s{$vendor_sep_regex}{}gr; state %OBJECT_CACHE; return $OBJECT_CACHE{$vendor_key} if exists $OBJECT_CACHE{$vendor_key}; my ($obj, @names); my @vendor_parts = split m{$vendor_sep_regex}, $vendor; push @names, join q{}, map { ucfirst } @vendor_parts; push @names, join q{}, map { ucfirst lc } @vendor_parts; # XXX: Backwards compatibility, remove on 1.22.x. my %name_seen = map { $_ => 1 } @names; my @obsolete_names = uniq grep { my $seen = exists $name_seen{$_}; $name_seen{$_} = 1; not $seen; } (ucfirst $vendor, ucfirst lc $vendor, $vendor, lc $vendor); my %obsolete_name = map { $_ => 1 } @obsolete_names; push @names, @obsolete_names; foreach my $name (uniq @names) { eval qq{ require Dpkg::Vendor::$name; \$obj = Dpkg::Vendor::$name->new(); }; unless ($@) { $OBJECT_CACHE{$vendor_key} = $obj; if (exists $obsolete_name{$name}) { warning(g_('%s module name is deprecated; ' . 'it should be capitalized with only alphanumeric characters'), "Dpkg::Vendor::$name"); } return $obj; } } my $info = get_vendor_info($vendor); if (defined $info and defined $info->{'Parent'}) { return get_vendor_object($info->{'Parent'}); } else { return get_vendor_object('Default'); } } =item run_vendor_hook($hookid, @params) Run a hook implemented by the current vendor object. =cut sub run_vendor_hook { my @args = @_; my $vendor_obj = get_vendor_object(); $vendor_obj->run_hook(@args); } =back =head1 CHANGES =head2 Version 1.02 (dpkg 1.21.10) Deprecated behavior: get_vendor_file() loading vendor files with no special characters remapping. get_vendor_object() loading vendor module names with no special character stripping. =head2 Version 1.01 (dpkg 1.17.0) New function: get_vendor_dir(). =head2 Version 1.00 (dpkg 1.16.1) Mark the module as public. =head1 SEE ALSO L. =cut 1;