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- # 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 <http://www.gnu.org/licenses/>.
-
- package Dpkg::Conf;
-
- use strict;
- use warnings;
-
- our $VERSION = "1.01";
-
- use Dpkg::Gettext;
- use Dpkg::ErrorHandling;
-
- use base qw(Dpkg::Interface::Storable);
-
- use overload
- '@{}' => sub { return [ $_[0]->get_options() ] },
- fallback => 1;
-
- =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 exports an array that can then be parsed exactly like @ARGV.
-
- =head1 FUNCTIONS
-
- =over 4
-
- =item my $conf = Dpkg::Conf->new(%opts)
-
- Create a new Dpkg::Conf object. Some options can be set through %opts:
- if allow_short evaluates to true (it defaults to false), then short
- options are allowed in the configuration file, they should be prepended
- with a single dash.
-
- =cut
-
- sub new {
- my ($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) = @_;
- return @{$self->{'options'}};
- }
-
- =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 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 (/^-[^-]/ 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(remove => $rmfunc)
-
- =item $conf->filter(keep => $keepfunc)
-
- Filter the list of options, either removing or keeping all those that
- return true when &$rmfunc($option) or &keepfunc($option) is called.
-
- =cut
-
- sub filter {
- my ($self, %opts) = @_;
- if (defined($opts{'remove'})) {
- @{$self->{'options'}} = grep { not &{$opts{'remove'}}($_) }
- @{$self->{'options'}};
- }
- if (defined($opts{'keep'})) {
- @{$self->{'options'}} = grep { &{$opts{'keep'}}($_) }
- @{$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.
-
- =item $conf->save($file)
-
- Save the options in a file.
-
- =cut
-
- sub output {
- my ($self, $fh) = @_;
- my $ret = "";
- foreach my $opt ($self->get_options()) {
- $opt =~ s/^--//;
- if ($opt =~ s/^([^=]+)=/$1 = "/) {
- $opt .= '"';
- }
- $opt .= "\n";
- print $fh $opt if defined $fh;
- $ret .= $opt;
- }
- return $ret;
- }
-
- =back
-
- =head1 AUTHOR
-
- Raphaël Hertzog <hertzog@debian.org>.
-
- =cut
-
- 1;
-