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# $OpenBSD: Getopt.pm,v 1.1 2012/07/08 10:12:19 espie Exp $
# Copyright (c) 2012 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
use strict;
use warnings;
package Option;
sub factory
{
my ($class, $_) = @_;
if (m/^(.)$/) {
return Option::Short->new($1);
} elsif (m/^(.)\:$/) {
return Option::ShortArg->new($1);
} elsif (m/^(\-?.*)\=$/) {
return Option::LongArg->new($1);
} elsif (m/^(\-?.*)$/) {
return Option::Long->new($1);
}
}
sub new
{
my ($class, $v) = @_;
bless \$v, $class;
}
package Option::Short;
our @ISA = qw(Option);
sub setup
{
# short options don't make accessors
}
sub match
{
my ($self, $_, $opts, $canonical, $code) = @_;
if (m/^\-\Q$$self\E$/) {
&$code($opts, $canonical, 1);
return 1;
}
if (m/^\-\Q$$self\E(.*)$/) {
unshift(@main::ARGV, "-$1");
&$code($opts, $canonical, 1);
return 1;
}
return 0;
}
package Option::ShortArg;
our @ISA = qw(Option::Short);
sub match
{
my ($self, $_, $opts, $canonical, $code) = @_;
if (m/^\-\Q$$self\E$/) {
&$code($opts, $canonical, (shift @main::ARGV));
return 1;
}
if (m/^\-\Q$$self\E(.*)$/) {
&$code($opts, $canonical, $1);
return 1;
}
return 0;
}
package Option::Long;
our @ISA = qw(Option);
sub setup
{
my ($self, $opts) = @_;
$opts->add_option_accessor($$self);
return $self;
}
sub match
{
my ($self, $_, $opts, $canonical, $code) = @_;
if (m/^\-$$self$/) {
&$code($opts, $canonical, 1);
return 1;
}
return 0;
}
package Option::LongArg;
our @ISA = qw(Option::Long);
sub match
{
my ($self, $_, $opts, $canonical, $code) = @_;
if (m/^\-\Q$$self\E$/) {
if (@main::ARGV > 0) {
&$code($opts, $canonical, (shift @main::ARGV));
return 1;
} else {
die "Missing argument for option -$$self\n";
}
}
if (m/^-\Q$$self\E\=(.*)$/) {
&$code($opts, $canonical, $1);
return 1;
}
return 0;
}
package Options;
sub new
{
my ($class, $string, $code) = @_;
my @alternates = split(/\|/, $string);
bless {alt => [map { Option->factory($_); } @alternates], code => $code}, $class;
}
sub setup
{
my ($self, $allopts) = @_;
$self->{alt}[0]->setup($allopts);
return $self;
}
sub match
{
my ($self, $arg, $opts) = @_;
my $canonical = ${$self->{alt}[0]};
for my $s (@{$self->{alt}}) {
if ($s->match($arg, $opts, $canonical, $self->{code})) {
return 1;
}
}
return 0;
}
# seems I spend my life rewriting option handlers, not surprisingly...
package LT::Getopt;
# parsing an option 'all-static' will automatically add an
# accessor $self->all_static that maps to the option.
sub add_option_accessor
{
my ($self, $option) = @_;
my $access = $option;
$access =~ s/^\-//;
$access =~ s/-/_/g;
my $actual = sub {
my $self = shift;
return $self->{opt}{$option};
};
my $callpkg = ref($self);
unless ($self->can($access)) {
no strict 'refs';
*{$callpkg."::$access"} = $actual;
}
}
sub handle_options
{
my ($self, @l) = @_;
my @options = ();
# first pass creates accessors
while (my $opt = shift @l) {
# default code or not
my $code;
if (@l > 0 && ref($l[0]) eq 'CODE') {
$code = shift @l;
} else {
if ($opt =~ s/\@$//) {
$code = sub {
my ($object, $canonical, $value) = @_;
push(@{$object->{opt}{$canonical}}, $value);
};
} else {
$code = sub {
my ($object, $canonical, $value) = @_;
$object->{opt}{$canonical} = $value;
};
}
}
push(@options, Options->new($opt, $code)->setup($self));
}
MAINLOOP:
while (@main::ARGV > 0) {
my $_ = shift @main::ARGV;
if (m/^\-\-$/) {
last;
}
if (m/^\-/) {
for my $opt (@options) {
if ($opt->match($_, $self)) {
next MAINLOOP;
}
}
die "Unknown option $_\n";
} else {
unshift(@main::ARGV, $_);
}
}
}
sub new
{
my $class = shift;
bless {}, $class;
}
1;
|
