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+# Copyright © 2009 Raphaël Hertzog <hertzog@debian.org>
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+#
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program. If not, see <http://www.gnu.org/licenses/>.
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+
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+package Dpkg::Conf;
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+
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+use strict;
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+use warnings;
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+
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+use Dpkg::Gettext;
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+use Dpkg::ErrorHandling;
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+
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+use overload
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+ '@{}' => sub { $_[0]->{'options'} },
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+ '""' => sub { join(" ", @{$_[0]->{'options'}}) },
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+ fallback => 1;
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+
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+=head1 NAME
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+
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+Dpkg::Conf - parse dpkg configuration files
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+
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+=head1 DESCRIPTION
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+
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+The Dpkg::Conf object can be used to read options from a configuration
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+file. It can exports an array that can then be parsed exactly like @ARGV.
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+
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+=head1 FUNCTIONS
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+
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+=over 4
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+
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+=item my $conf = Dpkg::Conf->new()
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+
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+Create a new Dpkg::Conf object.
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+
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+=cut
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+
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+sub new {
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+ my ($this, %opts) = @_;
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+ my $class = ref($this) || $this;
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+
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+ my $self = {
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+ options => [],
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+ };
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+ bless $self, $class;
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+
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+ return $self;
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+}
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+
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+=item @$conf
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+
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+Returns the list of options to be parsed.
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+
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+=item $conf->load($file)
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+
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+Read options from a file. Return the number of options parsed.
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+
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+=item $conf->parse($fh)
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+
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+Parse options from a file handle. Return the number of options parsed.
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+
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+=cut
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+
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+sub load {
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+ my ($self, $file) = @_;
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+ open(my $fh, "<", $file) or syserr(_g("cannot read %s"), $file);
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+ my $ret = $self->parse($fh, $file);
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+ close($fh);
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+ return $ret;
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+}
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+
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+sub parse {
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+ my ($self, $fh, $desc) = @_;
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+ my $count = 0;
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+ while (<$fh>) {
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+ chomp;
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+ s/^\s+//; s/\s+$//; # Strip leading/trailing spaces
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+ s/\s+=\s+/=/; # Remove spaces around the first =
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+ s/\s+/=/ unless m/=/; # First spaces becomes = if no =
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+ next if /^#/ or /^$/; # Skip empty lines and comments
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+ if (/^(\S+)(?:=(.*))?$/) {
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+ my ($name, $value) = ($1, $2);
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+ $name = "--$name" unless $name =~ /^-/;
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+ if (defined $value) {
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+ $value =~ s/^"(.*)"$/$1/ or $value =~ s/^'(.*)'$/$1/;
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+ push @{$self->{'options'}}, "$name=$value";
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+ } else {
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+ push @{$self->{'options'}}, $name;
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+ }
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+ $count++;
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+ } else {
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+ warning(_g("invalid syntax for option in %s, line %d"),
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+ $desc, $.);
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+ }
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+ }
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+ return $count;
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+}
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+
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+=back
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+
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+=head1 AUTHOR
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+
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+Raphaël Hertzog <hertzog@debian.org>.
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+
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+=cut
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+
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+1;
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Raphaël Hertzog