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Diffstat (limited to 'lib/Autom4te/Getopt.pm')
| -rw-r--r-- | lib/Autom4te/Getopt.pm | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/lib/Autom4te/Getopt.pm b/lib/Autom4te/Getopt.pm new file mode 100644 index 0000000..d73c5ef --- /dev/null +++ b/lib/Autom4te/Getopt.pm @@ -0,0 +1,115 @@ +# Copyright (C) 2012 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 Autom4te::Getopt; + +=head1 NAME + +Autom4te::Getopt - GCS conforming parser for command line options + +=head1 SYNOPSIS + + use Autom4te::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 Autom4te::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: |