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# Copyright © 2009 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 <http://www.gnu.org/licenses/>.
package Dpkg::Conf;
use strict;
use warnings;
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use overload
'@{}' => sub { $_[0]->{'options'} },
'""' => sub { join(" ", @{$_[0]->{'options'}}) },
fallback => 1;
=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 exports an array that can then be parsed exactly like @ARGV.
=head1 FUNCTIONS
=over 4
=item my $conf = Dpkg::Conf->new()
Create a new Dpkg::Conf object.
=cut
sub new {
my ($this, %opts) = @_;
my $class = ref($this) || $this;
my $self = {
options => [],
};
bless $self, $class;
return $self;
}
=item @$conf
Returns the list of options to be parsed.
=item $conf->load($file)
Read options from a file. Return the number of options parsed.
=item $conf->parse($fh)
Parse options from a file handle. Return the number of options parsed.
=cut
sub load {
my ($self, $file) = @_;
open(my $fh, "<", $file) or syserr(_g("cannot read %s"), $file);
my $ret = $self->parse($fh, $file);
close($fh);
return $ret;
}
sub parse {
my ($self, $fh, $desc) = @_;
my $count = 0;
while (<$fh>) {
chomp;
s/^\s+//; s/\s+$//; # Strip leading/trailing spaces
s/\s+=\s+/=/; # Remove spaces around the first =
s/\s+/=/ unless m/=/; # First spaces becomes = if no =
next if /^#/ or /^$/; # Skip empty lines and comments
if (/^(\S+)(?:=(.*))?$/) {
my ($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;
}
=back
=head1 AUTHOR
Raphaël Hertzog <hertzog@debian.org>.
=cut
1;
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