1 files changed, 269 insertions, 0 deletions
diff --git a/scripts/Dpkg/Conf.pm b/scripts/Dpkg/Conf.pm
new file mode 100644
index 0000000..2894d35
--- /dev/null
+++ b/scripts/Dpkg/Conf.pm
@@ -0,0 +1,269 @@
+# Copyright © 2009-2010 Raphaël Hertzog <hertzog@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/>.
+
+=encoding utf8
+
+=head1 NAME
+
+Dpkg::Conf - parse dpkg configuration files
+
+=head1 DESCRIPTION
+
+The Dpkg::Conf object can be used to read options from a configuration
+file. It can export an array that can then be parsed exactly like @ARGV.
+
+=cut
+
+package Dpkg::Conf 1.04;
+
+use strict;
+use warnings;
+
+use Carp;
+
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+
+use parent qw(Dpkg::Interface::Storable);
+
+use overload
+    '@{}' => sub { return [ $_[0]->get_options() ] },
+    fallback => 1;
+
+=head1 METHODS
+
+=over 4
+
+=item $conf = Dpkg::Conf->new(%opts)
+
+Create a new Dpkg::Conf object. Some options can be set through %opts:
+if allow_short evaluates to true (it defaults to false), then short
+options are allowed in the configuration file, they should be prepended
+with a single hyphen.
+
+=cut
+
+sub new {
+    my ($this, %opts) = @_;
+    my $class = ref($this) || $this;
+
+    my $self = {
+	options => [],
+	allow_short => 0,
+    };
+    foreach my $opt (keys %opts) {
+	$self->{$opt} = $opts{$opt};
+    }
+    bless $self, $class;
+
+    return $self;
+}
+
+=item @$conf
+
+=item @options = $conf->get_options()
+
+Returns the list of options that can be parsed like @ARGV.
+
+=cut
+
+sub get_options {
+    my $self = shift;
+
+    return @{$self->{options}};
+}
+
+=item $conf->load($file)
+
+Read options from a file. Return the number of options parsed.
+
+=item $conf->load_system_config($file)
+
+Read options from a system configuration file.
+
+Return the number of options parsed.
+
+=cut
+
+sub load_system_config {
+    my ($self, $file) = @_;
+
+    return 0 unless -e "$Dpkg::CONFDIR/$file";
+    return $self->load("$Dpkg::CONFDIR/$file");
+}
+
+=item $conf->load_user_config($file)
+
+Read options from a user configuration file. It will try to use the XDG
+directory, either $XDG_CONFIG_HOME/dpkg/ or $HOME/.config/dpkg/.
+
+Return the number of options parsed.
+
+=cut
+
+sub load_user_config {
+    my ($self, $file) = @_;
+
+    my $confdir = $ENV{XDG_CONFIG_HOME};
+    $confdir ||= $ENV{HOME} . '/.config' if length $ENV{HOME};
+
+    return 0 unless length $confdir;
+    return 0 unless -e "$confdir/dpkg/$file";
+    return $self->load("$confdir/dpkg/$file") if length $confdir;
+    return 0;
+}
+
+=item $conf->load_config($file)
+
+Read options from system and user configuration files.
+
+Return the number of options parsed.
+
+=cut
+
+sub load_config {
+    my ($self, $file) = @_;
+
+    my $nopts = 0;
+
+    $nopts += $self->load_system_config($file);
+    $nopts += $self->load_user_config($file);
+
+    return $nopts;
+}
+
+=item $conf->parse($fh)
+
+Parse options from a file handle. When called multiple times, the parsed
+options are accumulated.
+
+Return the number of options parsed.
+
+=cut
+
+sub parse {
+    my ($self, $fh, $desc) = @_;
+    my $count = 0;
+    local $_;
+
+    while (<$fh>) {
+	chomp;
+	s/^\s+//;             # Strip leading spaces
+	s/\s+$//;             # Strip trailing spaces
+	s/\s+=\s+/=/;         # Remove spaces around the first =
+	s/\s+/=/ unless m/=/; # First spaces becomes = if no =
+	# Skip empty lines and comments
+	next if /^#/ or length == 0;
+	if (/^-[^-]/ and not $self->{allow_short}) {
+	    warning(g_('short option not allowed in %s, line %d'), $desc, $.);
+	    next;
+	}
+	if (/^([^=]+)(?:=(.*))?$/) {
+	    my ($name, $value) = ($1, $2);
+	    $name = "--$name" unless $name =~ /^-/;
+	    if (defined $value) {
+		$value =~ s/^"(.*)"$/$1/ or $value =~ s/^'(.*)'$/$1/;
+		push @{$self->{options}}, "$name=$value";
+	    } else {
+		push @{$self->{options}}, $name;
+	    }
+	    $count++;
+	} else {
+	    warning(g_('invalid syntax for option in %s, line %d'), $desc, $.);
+	}
+    }
+    return $count;
+}
+
+=item $conf->filter(%opts)
+
+Filter the list of options, either removing or keeping all those that
+return true when $opts{remove}->($option) or $opts{keep}->($option) is called.
+
+=cut
+
+sub filter {
+    my ($self, %opts) = @_;
+    my $remove = $opts{remove} // sub { 0 };
+    my $keep = $opts{keep} // sub { 1 };
+
+    @{$self->{options}} = grep { not $remove->($_) and $keep->($_) }
+                               @{$self->{options}};
+}
+
+=item $string = $conf->output([$fh])
+
+Write the options in the given filehandle (if defined) and return a string
+representation of the content (that would be) written.
+
+=item "$conf"
+
+Return a string representation of the content.
+
+=cut
+
+sub output {
+    my ($self, $fh) = @_;
+    my $ret = '';
+    foreach my $opt ($self->get_options()) {
+	$opt =~ s/^--//;
+	$opt =~ s/^([^=]+)=(.*)$/$1 = "$2"/;
+	$opt .= "\n";
+	print { $fh } $opt if defined $fh;
+	$ret .= $opt;
+    }
+    return $ret;
+}
+
+=item $conf->save($file)
+
+Save the options in a file.
+
+=back
+
+=head1 CHANGES
+
+=head2 Version 1.04 (dpkg 1.20.0)
+
+Remove croak: For 'format_argv' in $conf->filter().
+
+Remove methods: $conf->get(), $conf->set().
+
+=head2 Version 1.03 (dpkg 1.18.8)
+
+Obsolete option: 'format_argv' in $conf->filter().
+
+Obsolete methods: $conf->get(), $conf->set().
+
+New methods: $conf->load_system_config(), $conf->load_system_user(),
+$conf->load_config().
+
+=head2 Version 1.02 (dpkg 1.18.5)
+
+New option: Accept new option 'format_argv' in $conf->filter().
+
+New methods: $conf->get(), $conf->set().
+
+=head2 Version 1.01 (dpkg 1.15.8)
+
+New method: $conf->filter()
+
+=head2 Version 1.00 (dpkg 1.15.6)
+
+Mark the module as public.
+
+=cut
+
+1;