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# Copyright (C) 2012-2013 Free Software Foundation, Inc.
# 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 3 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 Automake::Getopt;
=head1 NAME
Automake::Getopt - GCS conforming parser for command line options
=head1 SYNOPSIS
use Automake::Getopt;
=head1 DESCRIPTION
Export a function C<parse_options>, performing parsing of command
line options in conformance to the GNU Coding standards.
=cut
use 5.006;
use strict;
use warnings FATAL => 'all';
use Exporter ();
use Getopt::Long ();
use Automake::ChannelDefs qw/fatal/;
use Carp qw/croak confess/;
use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT= qw/getopt/;
=item C<parse_options (%option)>
Wrapper around C<Getopt::Long>, trying to conform to the GNU
Coding Standards for error messages.
=cut
sub parse_options (%)
{
my %option = @_;
Getopt::Long::Configure ("bundling", "pass_through");
# Unrecognized options are passed through, so GetOption can only fail
# due to internal errors or misuse of options specification.
Getopt::Long::GetOptions (%option)
or confess "error in options specification (likely)";
if (@ARGV && $ARGV[0] =~ /^-./)
{
my %argopts;
for my $k (keys %option)
{
if ($k =~ /(.*)=s$/)
{
map { $argopts{(length ($_) == 1)
? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
}
}
if ($ARGV[0] eq '--')
{
shift @ARGV;
}
elsif (exists $argopts{$ARGV[0]})
{
fatal ("option '$ARGV[0]' requires an argument\n"
. "Try '$0 --help' for more information.");
}
else
{
fatal ("unrecognized option '$ARGV[0]'.\n"
. "Try '$0 --help' for more information.");
}
}
}
=back
=head1 SEE ALSO
L<Getopt::Long>
=cut
1; # for require
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End: