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-rw-r--r--gnu/usr.bin/perl/lib/Getopt/Long.pm1566
1 files changed, 855 insertions, 711 deletions
diff --git a/gnu/usr.bin/perl/lib/Getopt/Long.pm b/gnu/usr.bin/perl/lib/Getopt/Long.pm
index 4f23f5d6c13..e9a8f1a1cc8 100644
--- a/gnu/usr.bin/perl/lib/Getopt/Long.pm
+++ b/gnu/usr.bin/perl/lib/Getopt/Long.pm
@@ -2,508 +2,17 @@
package Getopt::Long;
-# RCS Status : $Id: Long.pm,v 1.2 1997/11/30 07:57:41 millert Exp $
+# RCS Status : $Id: Long.pm,v 1.3 1999/04/29 22:51:55 millert Exp $
# Author : Johan Vromans
# Created On : Tue Sep 11 15:00:12 1990
# Last Modified By: Johan Vromans
-# Last Modified On: Wed Sep 17 12:20:10 1997
-# Update Count : 608
+# Last Modified On: Fri Jan 8 14:48:43 1999
+# Update Count : 707
# Status : Released
-=head1 NAME
-
-GetOptions - extended processing of command line options
-
-=head1 SYNOPSIS
-
- use Getopt::Long;
- $result = GetOptions (...option-descriptions...);
-
-=head1 DESCRIPTION
-
-The Getopt::Long module implements an extended getopt function called
-GetOptions(). This function adheres to the POSIX syntax for command
-line options, with GNU extensions. In general, this means that options
-have long names instead of single letters, and are introduced with a
-double dash "--". Support for bundling of command line options, as was
-the case with the more traditional single-letter approach, is provided
-but not enabled by default. For example, the UNIX "ps" command can be
-given the command line "option"
-
- -vax
-
-which means the combination of B<-v>, B<-a> and B<-x>. With the new
-syntax B<--vax> would be a single option, probably indicating a
-computer architecture.
-
-Command line options can be used to set values. These values can be
-specified in one of two ways:
-
- --size 24
- --size=24
-
-GetOptions is called with a list of option-descriptions, each of which
-consists of two elements: the option specifier and the option linkage.
-The option specifier defines the name of the option and, optionally,
-the value it can take. The option linkage is usually a reference to a
-variable that will be set when the option is used. For example, the
-following call to GetOptions:
-
- GetOptions("size=i" => \$offset);
-
-will accept a command line option "size" that must have an integer
-value. With a command line of "--size 24" this will cause the variable
-$offset to get the value 24.
-
-Alternatively, the first argument to GetOptions may be a reference to
-a HASH describing the linkage for the options, or an object whose
-class is based on a HASH. The following call is equivalent to the
-example above:
-
- %optctl = ("size" => \$offset);
- GetOptions(\%optctl, "size=i");
-
-Linkage may be specified using either of the above methods, or both.
-Linkage specified in the argument list takes precedence over the
-linkage specified in the HASH.
-
-The command line options are taken from array @ARGV. Upon completion
-of GetOptions, @ARGV will contain the rest (i.e. the non-options) of
-the command line.
-
-Each option specifier designates the name of the option, optionally
-followed by an argument specifier. Values for argument specifiers are:
-
-=over 8
-
-=item E<lt>noneE<gt>
-
-Option does not take an argument.
-The option variable will be set to 1.
-
-=item !
-
-Option does not take an argument and may be negated, i.e. prefixed by
-"no". E.g. "foo!" will allow B<--foo> (with value 1) and B<-nofoo>
-(with value 0).
-The option variable will be set to 1, or 0 if negated.
-
-=item =s
-
-Option takes a mandatory string argument.
-This string will be assigned to the option variable.
-Note that even if the string argument starts with B<-> or B<-->, it
-will not be considered an option on itself.
-
-=item :s
-
-Option takes an optional string argument.
-This string will be assigned to the option variable.
-If omitted, it will be assigned "" (an empty string).
-If the string argument starts with B<-> or B<-->, it
-will be considered an option on itself.
-
-=item =i
-
-Option takes a mandatory integer argument.
-This value will be assigned to the option variable.
-Note that the value may start with B<-> to indicate a negative
-value.
-
-=item :i
-
-Option takes an optional integer argument.
-This value will be assigned to the option variable.
-If omitted, the value 0 will be assigned.
-Note that the value may start with B<-> to indicate a negative
-value.
-
-=item =f
-
-Option takes a mandatory real number argument.
-This value will be assigned to the option variable.
-Note that the value may start with B<-> to indicate a negative
-value.
-
-=item :f
-
-Option takes an optional real number argument.
-This value will be assigned to the option variable.
-If omitted, the value 0 will be assigned.
-
-=back
-
-A lone dash B<-> is considered an option, the corresponding option
-name is the empty string.
-
-A double dash on itself B<--> signals end of the options list.
-
-=head2 Linkage specification
-
-The linkage specifier is optional. If no linkage is explicitly
-specified but a ref HASH is passed, GetOptions will place the value in
-the HASH. For example:
-
- %optctl = ();
- GetOptions (\%optctl, "size=i");
-
-will perform the equivalent of the assignment
-
- $optctl{"size"} = 24;
-
-For array options, a reference to an array is used, e.g.:
-
- %optctl = ();
- GetOptions (\%optctl, "sizes=i@");
-
-with command line "-sizes 24 -sizes 48" will perform the equivalent of
-the assignment
-
- $optctl{"sizes"} = [24, 48];
-
-For hash options (an option whose argument looks like "name=value"),
-a reference to a hash is used, e.g.:
-
- %optctl = ();
- GetOptions (\%optctl, "define=s%");
-
-with command line "--define foo=hello --define bar=world" will perform the
-equivalent of the assignment
-
- $optctl{"define"} = {foo=>'hello', bar=>'world')
-
-If no linkage is explicitly specified and no ref HASH is passed,
-GetOptions will put the value in a global variable named after the
-option, prefixed by "opt_". To yield a usable Perl variable,
-characters that are not part of the syntax for variables are
-translated to underscores. For example, "--fpp-struct-return" will set
-the variable $opt_fpp_struct_return. Note that this variable resides
-in the namespace of the calling program, not necessarily B<main>.
-For example:
-
- GetOptions ("size=i", "sizes=i@");
-
-with command line "-size 10 -sizes 24 -sizes 48" will perform the
-equivalent of the assignments
-
- $opt_size = 10;
- @opt_sizes = (24, 48);
-
-A lone dash B<-> is considered an option, the corresponding Perl
-identifier is $opt_ .
-
-The linkage specifier can be a reference to a scalar, a reference to
-an array, a reference to a hash or a reference to a subroutine.
-
-If a REF SCALAR is supplied, the new value is stored in the referenced
-variable. If the option occurs more than once, the previous value is
-overwritten.
-
-If a REF ARRAY is supplied, the new value is appended (pushed) to the
-referenced array.
-
-If a REF HASH is supplied, the option value should look like "key" or
-"key=value" (if the "=value" is omitted then a value of 1 is implied).
-In this case, the element of the referenced hash with the key "key"
-is assigned "value".
-
-If a REF CODE is supplied, the referenced subroutine is called with
-two arguments: the option name and the option value.
-The option name is always the true name, not an abbreviation or alias.
-
-=head2 Aliases and abbreviations
-
-The option name may actually be a list of option names, separated by
-"|"s, e.g. "foo|bar|blech=s". In this example, "foo" is the true name
-of this option. If no linkage is specified, options "foo", "bar" and
-"blech" all will set $opt_foo.
-
-Option names may be abbreviated to uniqueness, depending on
-configuration option B<auto_abbrev>.
-
-=head2 Non-option call-back routine
-
-A special option specifier, E<lt>E<gt>, can be used to designate a subroutine
-to handle non-option arguments. GetOptions will immediately call this
-subroutine for every non-option it encounters in the options list.
-This subroutine gets the name of the non-option passed.
-This feature requires configuration option B<permute>, see section
-CONFIGURATION OPTIONS.
-
-See also the examples.
-
-=head2 Option starters
-
-On the command line, options can start with B<-> (traditional), B<-->
-(POSIX) and B<+> (GNU, now being phased out). The latter is not
-allowed if the environment variable B<POSIXLY_CORRECT> has been
-defined.
-
-Options that start with "--" may have an argument appended, separated
-with an "=", e.g. "--foo=bar".
-
-=head2 Return value
-
-A return status of 0 (false) indicates that the function detected
-one or more errors.
-
-=head1 COMPATIBILITY
-
-Getopt::Long::GetOptions() is the successor of
-B<newgetopt.pl> that came with Perl 4. It is fully upward compatible.
-In fact, the Perl 5 version of newgetopt.pl is just a wrapper around
-the module.
-
-If an "@" sign is appended to the argument specifier, the option is
-treated as an array. Value(s) are not set, but pushed into array
-@opt_name. If explicit linkage is supplied, this must be a reference
-to an ARRAY.
-
-If an "%" sign is appended to the argument specifier, the option is
-treated as a hash. Value(s) of the form "name=value" are set by
-setting the element of the hash %opt_name with key "name" to "value"
-(if the "=value" portion is omitted it defaults to 1). If explicit
-linkage is supplied, this must be a reference to a HASH.
-
-If configuration option B<getopt_compat> is set (see section
-CONFIGURATION OPTIONS), options that start with "+" or "-" may also
-include their arguments, e.g. "+foo=bar". This is for compatiblity
-with older implementations of the GNU "getopt" routine.
-
-If the first argument to GetOptions is a string consisting of only
-non-alphanumeric characters, it is taken to specify the option starter
-characters. Everything starting with one of these characters from the
-starter will be considered an option. B<Using a starter argument is
-strongly deprecated.>
-
-For convenience, option specifiers may have a leading B<-> or B<-->,
-so it is possible to write:
-
- GetOptions qw(-foo=s --bar=i --ar=s);
-
-=head1 EXAMPLES
-
-If the option specifier is "one:i" (i.e. takes an optional integer
-argument), then the following situations are handled:
-
- -one -two -> $opt_one = '', -two is next option
- -one -2 -> $opt_one = -2
-
-Also, assume specifiers "foo=s" and "bar:s" :
-
- -bar -xxx -> $opt_bar = '', '-xxx' is next option
- -foo -bar -> $opt_foo = '-bar'
- -foo -- -> $opt_foo = '--'
-
-In GNU or POSIX format, option names and values can be combined:
-
- +foo=blech -> $opt_foo = 'blech'
- --bar= -> $opt_bar = ''
- --bar=-- -> $opt_bar = '--'
-
-Example of using variable references:
-
- $ret = GetOptions ('foo=s', \$foo, 'bar=i', 'ar=s', \@ar);
-
-With command line options "-foo blech -bar 24 -ar xx -ar yy"
-this will result in:
-
- $foo = 'blech'
- $opt_bar = 24
- @ar = ('xx','yy')
-
-Example of using the E<lt>E<gt> option specifier:
-
- @ARGV = qw(-foo 1 bar -foo 2 blech);
- GetOptions("foo=i", \$myfoo, "<>", \&mysub);
-
-Results:
-
- mysub("bar") will be called (with $myfoo being 1)
- mysub("blech") will be called (with $myfoo being 2)
-
-Compare this with:
-
- @ARGV = qw(-foo 1 bar -foo 2 blech);
- GetOptions("foo=i", \$myfoo);
-
-This will leave the non-options in @ARGV:
-
- $myfoo -> 2
- @ARGV -> qw(bar blech)
-
-=head1 CONFIGURATION OPTIONS
-
-B<GetOptions> can be configured by calling subroutine
-B<Getopt::Long::config>. This subroutine takes a list of quoted
-strings, each specifying a configuration option to be set, e.g.
-B<ignore_case>. Options can be reset by prefixing with B<no_>, e.g.
-B<no_ignore_case>. Case does not matter. Multiple calls to B<config>
-are possible.
-
-Previous versions of Getopt::Long used variables for the purpose of
-configuring. Although manipulating these variables still work, it
-is strongly encouraged to use the new B<config> routine. Besides, it
-is much easier.
-
-The following options are available:
-
-=over 12
-
-=item default
-
-This option causes all configuration options to be reset to their
-default values.
-
-=item auto_abbrev
-
-Allow option names to be abbreviated to uniqueness.
-Default is set unless environment variable
-POSIXLY_CORRECT has been set, in which case B<auto_abbrev> is reset.
-
-=item getopt_compat
-
-Allow '+' to start options.
-Default is set unless environment variable
-POSIXLY_CORRECT has been set, in which case B<getopt_compat> is reset.
-
-=item require_order
-
-Whether non-options are allowed to be mixed with
-options.
-Default is set unless environment variable
-POSIXLY_CORRECT has been set, in which case b<require_order> is reset.
-
-See also B<permute>, which is the opposite of B<require_order>.
-
-=item permute
-
-Whether non-options are allowed to be mixed with
-options.
-Default is set unless environment variable
-POSIXLY_CORRECT has been set, in which case B<permute> is reset.
-Note that B<permute> is the opposite of B<require_order>.
-
-If B<permute> is set, this means that
-
- -foo arg1 -bar arg2 arg3
-
-is equivalent to
-
- -foo -bar arg1 arg2 arg3
-
-If a non-option call-back routine is specified, @ARGV will always be
-empty upon succesful return of GetOptions since all options have been
-processed, except when B<--> is used:
-
- -foo arg1 -bar arg2 -- arg3
-
-will call the call-back routine for arg1 and arg2, and terminate
-leaving arg2 in @ARGV.
-
-If B<require_order> is set, options processing
-terminates when the first non-option is encountered.
-
- -foo arg1 -bar arg2 arg3
-
-is equivalent to
-
- -foo -- arg1 -bar arg2 arg3
-
-=item bundling (default: reset)
-
-Setting this variable to a non-zero value will allow single-character
-options to be bundled. To distinguish bundles from long option names,
-long options must be introduced with B<--> and single-character
-options (and bundles) with B<->. For example,
-
- ps -vax --vax
-
-would be equivalent to
-
- ps -v -a -x --vax
-
-provided "vax", "v", "a" and "x" have been defined to be valid
-options.
-
-Bundled options can also include a value in the bundle; this value has
-to be the last part of the bundle, e.g.
-
- scale -h24 -w80
-
-is equivalent to
-
- scale -h 24 -w 80
-
-Note: resetting B<bundling> also resets B<bundling_override>.
-
-=item bundling_override (default: reset)
-
-If B<bundling_override> is set, bundling is enabled as with
-B<bundling> but now long option names override option bundles. In the
-above example, B<-vax> would be interpreted as the option "vax", not
-the bundle "v", "a", "x".
-
-Note: resetting B<bundling_override> also resets B<bundling>.
-
-B<Note:> Using option bundling can easily lead to unexpected results,
-especially when mixing long options and bundles. Caveat emptor.
-
-=item ignore_case (default: set)
-
-If set, case is ignored when matching options.
-
-Note: resetting B<ignore_case> also resets B<ignore_case_always>.
-
-=item ignore_case_always (default: reset)
-
-When bundling is in effect, case is ignored on single-character
-options also.
-
-Note: resetting B<ignore_case_always> also resets B<ignore_case>.
-
-=item pass_through (default: reset)
-
-Unknown options are passed through in @ARGV instead of being flagged
-as errors. This makes it possible to write wrapper scripts that
-process only part of the user supplied options, and passes the
-remaining options to some other program.
-
-This can be very confusing, especially when B<permute> is also set.
-
-=item debug (default: reset)
-
-Enable copious debugging output.
-
-=back
-
-=head1 OTHER USEFUL VARIABLES
-
-=over 12
-
-=item $Getopt::Long::VERSION
-
-The version number of this Getopt::Long implementation in the format
-C<major>.C<minor>. This can be used to have Exporter check the
-version, e.g.
-
- use Getopt::Long 3.00;
-
-You can inspect $Getopt::Long::major_version and
-$Getopt::Long::minor_version for the individual components.
-
-=item $Getopt::Long::error
-
-Internal error flag. May be incremented from a call-back routine to
-cause options parsing to fail.
-
-=back
-
-=cut
-
################ Copyright ################
-# This program is Copyright 1990,1997 by Johan Vromans.
+# This program is Copyright 1990,1999 by Johan Vromans.
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
@@ -523,72 +32,124 @@ cause options parsing to fail.
use strict;
BEGIN {
- require 5.003;
+ require 5.004;
use Exporter ();
- use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
- $VERSION = sprintf("%d.%02d", q$Revision: 1.2 $ =~ /(\d+)\.(\d+)/);
-
- @ISA = qw(Exporter);
- @EXPORT = qw(&GetOptions $REQUIRE_ORDER $PERMUTE $RETURN_IN_ORDER);
- %EXPORT_TAGS = ();
- @EXPORT_OK = qw();
+ use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
+ $VERSION = "2.19";
+
+ @ISA = qw(Exporter);
+ @EXPORT = qw(&GetOptions $REQUIRE_ORDER $PERMUTE $RETURN_IN_ORDER);
+ %EXPORT_TAGS = qw();
+ @EXPORT_OK = qw();
+ use AutoLoader qw(AUTOLOAD);
}
-use vars @EXPORT, @EXPORT_OK;
# User visible variables.
+use vars @EXPORT, @EXPORT_OK;
use vars qw($error $debug $major_version $minor_version);
# Deprecated visible variables.
use vars qw($autoabbrev $getopt_compat $ignorecase $bundling $order
$passthrough);
+# Official invisible variables.
+use vars qw($genprefix);
+
+# Public subroutines.
+sub Configure (@);
+sub config (@); # deprecated name
+sub GetOptions;
+
+# Private subroutines.
+sub ConfigDefaults ();
+sub FindOption ($$$$$$$);
+sub Croak (@); # demand loading the real Croak
################ Local Variables ################
-my $gen_prefix; # generic prefix (option starters)
-my $argend; # option list terminator
-my %opctl; # table of arg.specs (long and abbrevs)
-my %bopctl; # table of arg.specs (bundles)
-my @opctl; # the possible long option names
-my $pkg; # current context. Needed if no linkage.
-my %aliases; # alias table
-my $genprefix; # so we can call the same module more
-my $opt; # current option
-my $arg; # current option value, if any
-my $array; # current option is array typed
-my $hash; # current option is hash typed
-my $key; # hash key for a hash option
- # than once in differing environments
-my $config_defaults; # set config defaults
-my $find_option; # helper routine
-
-################ Subroutines ################
+################ Resident subroutines ################
+
+sub ConfigDefaults () {
+ # Handle POSIX compliancy.
+ if ( defined $ENV{"POSIXLY_CORRECT"} ) {
+ $genprefix = "(--|-)";
+ $autoabbrev = 0; # no automatic abbrev of options
+ $bundling = 0; # no bundling of single letter switches
+ $getopt_compat = 0; # disallow '+' to start options
+ $order = $REQUIRE_ORDER;
+ }
+ else {
+ $genprefix = "(--|-|\\+)";
+ $autoabbrev = 1; # automatic abbrev of options
+ $bundling = 0; # bundling off by default
+ $getopt_compat = 1; # allow '+' to start options
+ $order = $PERMUTE;
+ }
+ # Other configurable settings.
+ $debug = 0; # for debugging
+ $error = 0; # error tally
+ $ignorecase = 1; # ignore case when matching options
+ $passthrough = 0; # leave unrecognized options alone
+}
+
+################ Initialization ################
+
+# Values for $order. See GNU getopt.c for details.
+($REQUIRE_ORDER, $PERMUTE, $RETURN_IN_ORDER) = (0..2);
+# Version major/minor numbers.
+($major_version, $minor_version) = $VERSION =~ /^(\d+)\.(\d+)/;
+
+# Set defaults.
+ConfigDefaults ();
+
+################ Package return ################
+
+1;
+
+__END__
+
+################ AutoLoading subroutines ################
+
+# RCS Status : $Id: Long.pm,v 1.3 1999/04/29 22:51:55 millert Exp $
+# Author : Johan Vromans
+# Created On : Fri Mar 27 11:50:30 1998
+# Last Modified By: Johan Vromans
+# Last Modified On: Sun Jun 14 13:54:35 1998
+# Update Count : 24
+# Status : Released
sub GetOptions {
my @optionlist = @_; # local copy of the option descriptions
- $argend = '--'; # option list terminator
- %opctl = (); # table of arg.specs (long and abbrevs)
- %bopctl = (); # table of arg.specs (bundles)
- $pkg = (caller)[0]; # current context
+ my $argend = '--'; # option list terminator
+ my %opctl = (); # table of arg.specs (long and abbrevs)
+ my %bopctl = (); # table of arg.specs (bundles)
+ my $pkg = (caller)[0]; # current context
# Needed if linkage is omitted.
- %aliases= (); # alias table
+ my %aliases= (); # alias table
my @ret = (); # accum for non-options
my %linkage; # linkage
my $userlinkage; # user supplied HASH
- $genprefix = $gen_prefix; # so we can call the same module many times
- $error = 0;
-
- print STDERR ('GetOptions $Revision: 1.2 $ ',
- "[GetOpt::Long $Getopt::Long::VERSION] -- ",
- "called from package \"$pkg\".\n",
- " (@ARGV)\n",
- " autoabbrev=$autoabbrev".
- ",bundling=$bundling",
- ",getopt_compat=$getopt_compat",
- ",order=$order",
- ",\n ignorecase=$ignorecase",
- ",passthrough=$passthrough",
- ",genprefix=\"$genprefix\"",
- ".\n")
+ my $opt; # current option
+ my $genprefix = $genprefix; # so we can call the same module many times
+ my @opctl; # the possible long option names
+
+ $error = '';
+
+ print STDERR ("GetOpt::Long $Getopt::Long::VERSION ",
+ "called from package \"$pkg\".",
+ "\n ",
+ 'GetOptionsAl $Revision: 1.3 $ ',
+ "\n ",
+ "ARGV: (@ARGV)",
+ "\n ",
+ "autoabbrev=$autoabbrev,".
+ "bundling=$bundling,",
+ "getopt_compat=$getopt_compat,",
+ "order=$order,",
+ "\n ",
+ "ignorecase=$ignorecase,",
+ "passthrough=$passthrough,",
+ "genprefix=\"$genprefix\".",
+ "\n")
if $debug;
# Check for ref HASH as first argument.
@@ -605,9 +166,9 @@ sub GetOptions {
# starter characters.
if ( $optionlist[0] =~ /^\W+$/ ) {
$genprefix = shift (@optionlist);
- # Turn into regexp.
+ # Turn into regexp. Needs to be parenthesized!
$genprefix =~ s/(\W)/\\$1/g;
- $genprefix = "[" . $genprefix . "]";
+ $genprefix = "([" . $genprefix . "])";
}
# Verify correctness of optionlist.
@@ -617,7 +178,7 @@ sub GetOptions {
my $opt = shift (@optionlist);
# Strip leading prefix so people can specify "--foo=i" if they like.
- $opt = $' if $opt =~ /^($genprefix)+/;
+ $opt = $+ if $opt =~ /^$genprefix+(.*)$/s;
if ( $opt eq '<>' ) {
if ( (defined $userlinkage)
@@ -628,20 +189,19 @@ sub GetOptions {
}
unless ( @optionlist > 0
&& ref($optionlist[0]) && ref($optionlist[0]) eq 'CODE' ) {
- warn ("Option spec <> requires a reference to a subroutine\n");
- $error++;
+ $error .= "Option spec <> requires a reference to a subroutine\n";
next;
}
$linkage{'<>'} = shift (@optionlist);
next;
}
- if ( $opt !~ /^(\w+[-\w|]*)?(!|[=:][infse][@%]?)?$/ ) {
- warn ("Error in option spec: \"", $opt, "\"\n");
- $error++;
+ # Match option spec. Allow '?' as an alias.
+ if ( $opt !~ /^((\w+[-\w]*)(\|(\?|\w[-\w]*)?)*)?([!~+]|[=:][infse][@%]?)?$/ ) {
+ $error .= "Error in option spec: \"$opt\"\n";
next;
}
- my ($o, $c, $a) = ($1, $2);
+ my ($o, $c, $a) = ($1, $5);
$c = '' unless defined $c;
if ( ! defined $o ) {
@@ -718,18 +278,19 @@ sub GetOptions {
$opctl{$o} .= '@'
if $opctl{$o} ne '' and $opctl{$o} !~ /\@$/;
$bopctl{$o} .= '@'
- if $bundling and $bopctl{$o} ne '' and $bopctl{$o} !~ /\@$/;
+ if $bundling and defined $bopctl{$o} and
+ $bopctl{$o} ne '' and $bopctl{$o} !~ /\@$/;
}
elsif ( ref($optionlist[0]) =~ /^(HASH)$/ ) {
$linkage{$o} = shift (@optionlist);
$opctl{$o} .= '%'
if $opctl{$o} ne '' and $opctl{$o} !~ /\%$/;
$bopctl{$o} .= '%'
- if $bundling and $bopctl{$o} ne '' and $bopctl{$o} !~ /\%$/;
+ if $bundling and defined $bopctl{$o} and
+ $bopctl{$o} ne '' and $bopctl{$o} !~ /\%$/;
}
else {
- warn ("Invalid option linkage for \"", $opt, "\"\n");
- $error++;
+ $error .= "Invalid option linkage for \"$opt\"\n";
}
}
else {
@@ -756,7 +317,8 @@ sub GetOptions {
}
# Bail out if errors found.
- return 0 if $error;
+ die ($error) if $error;
+ $error = 0;
# Sort the possible long option names.
@opctl = sort(keys (%opctl)) if $autoabbrev;
@@ -782,8 +344,6 @@ sub GetOptions {
#### Get next argument ####
$opt = shift (@ARGV);
- $arg = undef;
- $array = $hash = 0;
print STDERR ("=> option \"", $opt, "\"\n") if $debug;
#### Determine what we have ####
@@ -797,11 +357,19 @@ sub GetOptions {
}
my $tryopt = $opt;
+ my $found; # success status
+ my $dsttype; # destination type ('@' or '%')
+ my $incr; # destination increment
+ my $key; # key (if hash type)
+ my $arg; # option argument
- # find_option operates on the GLOBAL $opt and $arg!
- if ( &$find_option () ) {
+ ($found, $opt, $arg, $dsttype, $incr, $key) =
+ FindOption ($genprefix, $argend, $opt,
+ \%opctl, \%bopctl, \@opctl, \%aliases);
+
+ if ( $found ) {
- # find_option undefines $opt in case of errors.
+ # FindOption undefines $opt in case of errors.
next unless defined $opt;
if ( defined $arg ) {
@@ -812,8 +380,21 @@ sub GetOptions {
ref($linkage{$opt}), "\n") if $debug;
if ( ref($linkage{$opt}) eq 'SCALAR' ) {
- print STDERR ("=> \$\$L{$opt} = \"$arg\"\n") if $debug;
- ${$linkage{$opt}} = $arg;
+ if ( $incr ) {
+ print STDERR ("=> \$\$L{$opt} += \"$arg\"\n")
+ if $debug;
+ if ( defined ${$linkage{$opt}} ) {
+ ${$linkage{$opt}} += $arg;
+ }
+ else {
+ ${$linkage{$opt}} = $arg;
+ }
+ }
+ else {
+ print STDERR ("=> \$\$L{$opt} = \"$arg\"\n")
+ if $debug;
+ ${$linkage{$opt}} = $arg;
+ }
}
elsif ( ref($linkage{$opt}) eq 'ARRAY' ) {
print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
@@ -833,11 +414,11 @@ sub GetOptions {
else {
print STDERR ("Invalid REF type \"", ref($linkage{$opt}),
"\" in linkage\n");
- die ("Getopt::Long -- internal error!\n");
+ Croak ("Getopt::Long -- internal error!\n");
}
}
# No entry in linkage means entry in userlinkage.
- elsif ( $array ) {
+ elsif ( $dsttype eq '@' ) {
if ( defined $userlinkage->{$opt} ) {
print STDERR ("=> push(\@{\$L{$opt}}, \"$arg\")\n")
if $debug;
@@ -849,7 +430,7 @@ sub GetOptions {
$userlinkage->{$opt} = [$arg];
}
}
- elsif ( $hash ) {
+ elsif ( $dsttype eq '%' ) {
if ( defined $userlinkage->{$opt} ) {
print STDERR ("=> \$L{$opt}->{$key} = \"$arg\"\n")
if $debug;
@@ -862,8 +443,20 @@ sub GetOptions {
}
}
else {
- print STDERR ("=>\$L{$opt} = \"$arg\"\n") if $debug;
- $userlinkage->{$opt} = $arg;
+ if ( $incr ) {
+ print STDERR ("=> \$L{$opt} += \"$arg\"\n")
+ if $debug;
+ if ( defined $userlinkage->{$opt} ) {
+ $userlinkage->{$opt} += $arg;
+ }
+ else {
+ $userlinkage->{$opt} = $arg;
+ }
+ }
+ else {
+ print STDERR ("=>\$L{$opt} = \"$arg\"\n") if $debug;
+ $userlinkage->{$opt} = $arg;
+ }
}
}
}
@@ -873,7 +466,7 @@ sub GetOptions {
# Try non-options call-back.
my $cb;
if ( (defined ($cb = $linkage{'<>'})) ) {
- &$cb($tryopt);
+ &$cb ($tryopt);
}
else {
print STDERR ("=> saving \"$tryopt\" ",
@@ -903,92 +496,33 @@ sub GetOptions {
return ($error == 0);
}
-sub config (@) {
- my (@options) = @_;
- my $opt;
- foreach $opt ( @options ) {
- my $try = lc ($opt);
- my $action = 1;
- if ( $try =~ /^no_?/ ) {
- $action = 0;
- $try = $';
- }
- if ( $try eq 'default' or $try eq 'defaults' ) {
- &$config_defaults () if $action;
- }
- elsif ( $try eq 'auto_abbrev' or $try eq 'autoabbrev' ) {
- $autoabbrev = $action;
- }
- elsif ( $try eq 'getopt_compat' ) {
- $getopt_compat = $action;
- }
- elsif ( $try eq 'ignorecase' or $try eq 'ignore_case' ) {
- $ignorecase = $action;
- }
- elsif ( $try eq 'ignore_case_always' ) {
- $ignorecase = $action ? 2 : 0;
- }
- elsif ( $try eq 'bundling' ) {
- $bundling = $action;
- }
- elsif ( $try eq 'bundling_override' ) {
- $bundling = $action ? 2 : 0;
- }
- elsif ( $try eq 'require_order' ) {
- $order = $action ? $REQUIRE_ORDER : $PERMUTE;
- }
- elsif ( $try eq 'permute' ) {
- $order = $action ? $PERMUTE : $REQUIRE_ORDER;
- }
- elsif ( $try eq 'pass_through' or $try eq 'passthrough' ) {
- $passthrough = $action;
- }
- elsif ( $try eq 'debug' ) {
- $debug = $action;
- }
- else {
- $Carp::CarpLevel = 1;
- Carp::croak("Getopt::Long: unknown config parameter \"$opt\"")
- }
- }
-}
+# Option lookup.
+sub FindOption ($$$$$$$) {
-# Modified from Exporter. This one handles 2.001 and 2.01 etc just like 2.1.
-sub require_version {
- no strict;
- my ($self, $wanted) = @_;
- my $pkg = ref $self || $self;
- my $version = $ {"${pkg}::VERSION"} || "(undef)";
-
- $wanted .= '.0' unless $wanted =~ /\./;
- $wanted = $1 * 1000 + $2 if $wanted =~ /^(\d+)\.(\d+)$/;
- $version = $1 * 1000 + $2 if $version =~ /^(\d+)\.(\d+)$/;
- if ( $version < $wanted ) {
- $version =~ s/^(\d+)(\d\d\d)$/$1.'.'.(0+$2)/e;
- $wanted =~ s/^(\d+)(\d\d\d)$/$1.'.'.(0+$2)/e;
- $Carp::CarpLevel = 1;
- Carp::croak("$pkg $wanted required--this is only version $version")
- }
- $version;
-}
+ # returns (1, $opt, $arg, $dsttype, $incr, $key) if okay,
+ # returns (0) otherwise.
+
+ my ($prefix, $argend, $opt, $opctl, $bopctl, $names, $aliases) = @_;
+ my $key; # hash key for a hash option
+ my $arg;
-################ Private Subroutines ################
+ print STDERR ("=> find \"$opt\", prefix=\"$prefix\"\n") if $debug;
-$find_option = sub {
+ return (0) unless $opt =~ /^$prefix(.*)$/s;
- return 0 unless $opt =~ /^$genprefix/;
+ $opt = $+;
+ my ($starter) = $1;
- $opt = $';
- my ($starter) = $&;
+ print STDERR ("=> split \"$starter\"+\"$opt\"\n") if $debug;
my $optarg = undef; # value supplied with --opt=value
my $rest = undef; # remainder from unbundling
# If it is a long option, it may include the value.
- if (($starter eq "--" || $getopt_compat)
- && $opt =~ /^([^=]+)=/ ) {
+ if (($starter eq "--" || ($getopt_compat && !$bundling))
+ && $opt =~ /^([^=]+)=(.*)$/s ) {
$opt = $1;
- $optarg = $';
+ $optarg = $2;
print STDERR ("=> option \"", $opt,
"\", optarg = \"$optarg\"\n") if $debug;
}
@@ -996,8 +530,10 @@ $find_option = sub {
#### Look it up ###
my $tryopt = $opt; # option to try
- my $optbl = \%opctl; # table to look it up (long names)
+ my $optbl = $opctl; # table to look it up (long names)
my $type;
+ my $dsttype = '';
+ my $incr = 0;
if ( $bundling && $starter eq '-' ) {
# Unbundle single letter option.
@@ -1007,11 +543,12 @@ $find_option = sub {
print STDERR ("=> $starter$tryopt unbundled from ",
"$starter$tryopt$rest\n") if $debug;
$rest = undef unless $rest ne '';
- $optbl = \%bopctl; # look it up in the short names table
+ $optbl = $bopctl; # look it up in the short names table
# If bundling == 2, long options can override bundles.
if ( $bundling == 2 and
- defined ($type = $opctl{$tryopt.$rest}) ) {
+ defined ($rest) and
+ defined ($type = $opctl->{$tryopt.$rest}) ) {
print STDERR ("=> $starter$tryopt rebundled to ",
"$starter$tryopt$rest\n") if $debug;
$tryopt .= $rest;
@@ -1026,26 +563,26 @@ $find_option = sub {
# Turn option name into pattern.
my $pat = quotemeta ($opt);
# Look up in option names.
- my @hits = grep (/^$pat/, @opctl);
+ my @hits = grep (/^$pat/, @{$names});
print STDERR ("=> ", scalar(@hits), " hits (@hits) with \"$pat\" ",
- "out of ", scalar(@opctl), "\n") if $debug;
+ "out of ", scalar(@{$names}), "\n") if $debug;
# Check for ambiguous results.
unless ( (@hits <= 1) || (grep ($_ eq $opt, @hits) == 1) ) {
# See if all matches are for the same option.
my %hit;
foreach ( @hits ) {
- $_ = $aliases{$_} if defined $aliases{$_};
+ $_ = $aliases->{$_} if defined $aliases->{$_};
$hit{$_} = 1;
}
# Now see if it really is ambiguous.
unless ( keys(%hit) == 1 ) {
- return 0 if $passthrough;
- print STDERR ("Option ", $opt, " is ambiguous (",
- join(", ", @hits), ")\n");
+ return (0) if $passthrough;
+ warn ("Option ", $opt, " is ambiguous (",
+ join(", ", @hits), ")\n");
$error++;
undef $opt;
- return 1;
+ return (1, $opt,$arg,$dsttype,$incr,$key);
}
@hits = keys(%hit);
}
@@ -1067,10 +604,10 @@ $find_option = sub {
# Check validity by fetching the info.
$type = $optbl->{$tryopt} unless defined $type;
unless ( defined $type ) {
- return 0 if $passthrough;
+ return (0) if $passthrough;
warn ("Unknown option: ", $opt, "\n");
$error++;
- return 1;
+ return (1, $opt,$arg,$dsttype,$incr,$key);
}
# Apparently valid.
$opt = $tryopt;
@@ -1079,42 +616,43 @@ $find_option = sub {
#### Determine argument status ####
# If it is an option w/o argument, we're almost finished with it.
- if ( $type eq '' || $type eq '!' ) {
+ if ( $type eq '' || $type eq '!' || $type eq '+' ) {
if ( defined $optarg ) {
- return 0 if $passthrough;
- print STDERR ("Option ", $opt, " does not take an argument\n");
+ return (0) if $passthrough;
+ warn ("Option ", $opt, " does not take an argument\n");
$error++;
undef $opt;
}
- elsif ( $type eq '' ) {
+ elsif ( $type eq '' || $type eq '+' ) {
$arg = 1; # supply explicit value
+ $incr = $type eq '+';
}
else {
substr ($opt, 0, 2) = ''; # strip NO prefix
$arg = 0; # supply explicit value
}
unshift (@ARGV, $starter.$rest) if defined $rest;
- return 1;
+ return (1, $opt,$arg,$dsttype,$incr,$key);
}
# Get mandatory status and type info.
my $mand;
- ($mand, $type, $array, $hash) = $type =~ /^(.)(.)(@?)(%?)$/;
+ ($mand, $type, $dsttype, $key) = $type =~ /^(.)(.)([@%]?)$/;
# Check if there is an option argument available.
if ( defined $optarg ? ($optarg eq '')
: !(defined $rest || @ARGV > 0) ) {
# Complain if this option needs an argument.
if ( $mand eq "=" ) {
- return 0 if $passthrough;
- print STDERR ("Option ", $opt, " requires an argument\n");
+ return (0) if $passthrough;
+ warn ("Option ", $opt, " requires an argument\n");
$error++;
undef $opt;
}
if ( $mand eq ":" ) {
$arg = $type eq "s" ? '' : 0;
}
- return 1;
+ return (1, $opt,$arg,$dsttype,$incr,$key);
}
# Get (possibly optional) argument.
@@ -1123,23 +661,24 @@ $find_option = sub {
# Get key if this is a "name=value" pair for a hash option.
$key = undef;
- if ($hash && defined $arg) {
- ($key, $arg) = ($arg =~ /=/o) ? ($`, $') : ($arg, 1);
+ if ($dsttype eq '%' && defined $arg) {
+ ($key, $arg) = ($arg =~ /^(.*)=(.*)$/s) ? ($1, $2) : ($arg, 1);
}
#### Check if the argument is valid for this option ####
if ( $type eq "s" ) { # string
# A mandatory string takes anything.
- return 1 if $mand eq "=";
+ return (1, $opt,$arg,$dsttype,$incr,$key) if $mand eq "=";
# An optional string takes almost anything.
- return 1 if defined $optarg || defined $rest;
- return 1 if $arg eq "-"; # ??
+ return (1, $opt,$arg,$dsttype,$incr,$key)
+ if defined $optarg || defined $rest;
+ return (1, $opt,$arg,$dsttype,$incr,$key) if $arg eq "-"; # ??
# Check for option or option list terminator.
if ($arg eq $argend ||
- $arg =~ /^$genprefix.+/) {
+ $arg =~ /^$prefix.+/) {
# Push back.
unshift (@ARGV, $arg);
# Supply empty value.
@@ -1148,15 +687,20 @@ $find_option = sub {
}
elsif ( $type eq "n" || $type eq "i" ) { # numeric/integer
- if ( $arg !~ /^-?[0-9]+$/ ) {
+ if ( $bundling && defined $rest && $rest =~ /^(-?[0-9]+)(.*)$/s ) {
+ $arg = $1;
+ $rest = $2;
+ unshift (@ARGV, $starter.$rest) if defined $rest && $rest ne '';
+ }
+ elsif ( $arg !~ /^-?[0-9]+$/ ) {
if ( defined $optarg || $mand eq "=" ) {
if ( $passthrough ) {
unshift (@ARGV, defined $rest ? $starter.$rest : $arg)
unless defined $optarg;
- return 0;
+ return (0);
}
- print STDERR ("Value \"", $arg, "\" invalid for option ",
- $opt, " (number expected)\n");
+ warn ("Value \"", $arg, "\" invalid for option ",
+ $opt, " (number expected)\n");
$error++;
undef $opt;
# Push back.
@@ -1172,15 +716,24 @@ $find_option = sub {
}
elsif ( $type eq "f" ) { # real number, int is also ok
- if ( $arg !~ /^-?[0-9.]+([eE]-?[0-9]+)?$/ ) {
+ # We require at least one digit before a point or 'e',
+ # and at least one digit following the point and 'e'.
+ # [-]NN[.NN][eNN]
+ if ( $bundling && defined $rest &&
+ $rest =~ /^(-?[0-9]+(\.[0-9]+)?([eE]-?[0-9]+)?)(.*)$/s ) {
+ $arg = $1;
+ $rest = $+;
+ unshift (@ARGV, $starter.$rest) if defined $rest && $rest ne '';
+ }
+ elsif ( $arg !~ /^-?[0-9.]+(\.[0-9]+)?([eE]-?[0-9]+)?$/ ) {
if ( defined $optarg || $mand eq "=" ) {
if ( $passthrough ) {
unshift (@ARGV, defined $rest ? $starter.$rest : $arg)
unless defined $optarg;
- return 0;
+ return (0);
}
- print STDERR ("Value \"", $arg, "\" invalid for option ",
- $opt, " (real number expected)\n");
+ warn ("Value \"", $arg, "\" invalid for option ",
+ $opt, " (real number expected)\n");
$error++;
undef $opt;
# Push back.
@@ -1195,44 +748,635 @@ $find_option = sub {
}
}
else {
- die ("GetOpt::Long internal error (Can't happen)\n");
+ Croak ("GetOpt::Long internal error (Can't happen)\n");
}
- return 1;
-};
+ return (1, $opt, $arg, $dsttype, $incr, $key);
+}
-$config_defaults = sub {
- # Handle POSIX compliancy.
- if ( defined $ENV{"POSIXLY_CORRECT"} ) {
- $gen_prefix = "(--|-)";
- $autoabbrev = 0; # no automatic abbrev of options
- $bundling = 0; # no bundling of single letter switches
- $getopt_compat = 0; # disallow '+' to start options
- $order = $REQUIRE_ORDER;
- }
- else {
- $gen_prefix = "(--|-|\\+)";
- $autoabbrev = 1; # automatic abbrev of options
- $bundling = 0; # bundling off by default
- $getopt_compat = 1; # allow '+' to start options
- $order = $PERMUTE;
+# Getopt::Long Configuration.
+sub Configure (@) {
+ my (@options) = @_;
+ my $opt;
+ foreach $opt ( @options ) {
+ my $try = lc ($opt);
+ my $action = 1;
+ if ( $try =~ /^no_?(.*)$/s ) {
+ $action = 0;
+ $try = $+;
+ }
+ if ( $try eq 'default' or $try eq 'defaults' ) {
+ ConfigDefaults () if $action;
+ }
+ elsif ( $try eq 'auto_abbrev' or $try eq 'autoabbrev' ) {
+ $autoabbrev = $action;
+ }
+ elsif ( $try eq 'getopt_compat' ) {
+ $getopt_compat = $action;
+ }
+ elsif ( $try eq 'ignorecase' or $try eq 'ignore_case' ) {
+ $ignorecase = $action;
+ }
+ elsif ( $try eq 'ignore_case_always' ) {
+ $ignorecase = $action ? 2 : 0;
+ }
+ elsif ( $try eq 'bundling' ) {
+ $bundling = $action;
+ }
+ elsif ( $try eq 'bundling_override' ) {
+ $bundling = $action ? 2 : 0;
+ }
+ elsif ( $try eq 'require_order' ) {
+ $order = $action ? $REQUIRE_ORDER : $PERMUTE;
+ }
+ elsif ( $try eq 'permute' ) {
+ $order = $action ? $PERMUTE : $REQUIRE_ORDER;
+ }
+ elsif ( $try eq 'pass_through' or $try eq 'passthrough' ) {
+ $passthrough = $action;
+ }
+ elsif ( $try =~ /^prefix=(.+)$/ ) {
+ $genprefix = $1;
+ # Turn into regexp. Needs to be parenthesized!
+ $genprefix = "(" . quotemeta($genprefix) . ")";
+ eval { '' =~ /$genprefix/; };
+ Croak ("Getopt::Long: invalid pattern \"$genprefix\"") if $@;
+ }
+ elsif ( $try =~ /^prefix_pattern=(.+)$/ ) {
+ $genprefix = $1;
+ # Parenthesize if needed.
+ $genprefix = "(" . $genprefix . ")"
+ unless $genprefix =~ /^\(.*\)$/;
+ eval { '' =~ /$genprefix/; };
+ Croak ("Getopt::Long: invalid pattern \"$genprefix\"") if $@;
+ }
+ elsif ( $try eq 'debug' ) {
+ $debug = $action;
+ }
+ else {
+ Croak ("Getopt::Long: unknown config parameter \"$opt\"")
+ }
}
- # Other configurable settings.
- $debug = 0; # for debugging
- $error = 0; # error tally
- $ignorecase = 1; # ignore case when matching options
- $passthrough = 0; # leave unrecognized options alone
+}
+
+# Deprecated name.
+sub config (@) {
+ Configure (@_);
+}
+
+# To prevent Carp from being loaded unnecessarily.
+sub Croak (@) {
+ require 'Carp.pm';
+ $Carp::CarpLevel = 1;
+ Carp::croak(@_);
};
-################ Initialization ################
+################ Documentation ################
-# Values for $order. See GNU getopt.c for details.
-($REQUIRE_ORDER, $PERMUTE, $RETURN_IN_ORDER) = (0..2);
-# Version major/minor numbers.
-($major_version, $minor_version) = $VERSION =~ /^(\d+)\.(\d+)/;
+=head1 NAME
-# Set defaults.
-&$config_defaults ();
+GetOptions - extended processing of command line options
-################ Package return ################
+=head1 SYNOPSIS
-1;
+ use Getopt::Long;
+ $result = GetOptions (...option-descriptions...);
+
+=head1 DESCRIPTION
+
+The Getopt::Long module implements an extended getopt function called
+GetOptions(). This function adheres to the POSIX syntax for command
+line options, with GNU extensions. In general, this means that options
+have long names instead of single letters, and are introduced with a
+double dash "--". Support for bundling of command line options, as was
+the case with the more traditional single-letter approach, is provided
+but not enabled by default. For example, the UNIX "ps" command can be
+given the command line "option"
+
+ -vax
+
+which means the combination of B<-v>, B<-a> and B<-x>. With the new
+syntax B<--vax> would be a single option, probably indicating a
+computer architecture.
+
+Command line options can be used to set values. These values can be
+specified in one of two ways:
+
+ --size 24
+ --size=24
+
+GetOptions is called with a list of option-descriptions, each of which
+consists of two elements: the option specifier and the option linkage.
+The option specifier defines the name of the option and, optionally,
+the value it can take. The option linkage is usually a reference to a
+variable that will be set when the option is used. For example, the
+following call to GetOptions:
+
+ GetOptions("size=i" => \$offset);
+
+will accept a command line option "size" that must have an integer
+value. With a command line of "--size 24" this will cause the variable
+$offset to get the value 24.
+
+Alternatively, the first argument to GetOptions may be a reference to
+a HASH describing the linkage for the options, or an object whose
+class is based on a HASH. The following call is equivalent to the
+example above:
+
+ %optctl = ("size" => \$offset);
+ GetOptions(\%optctl, "size=i");
+
+Linkage may be specified using either of the above methods, or both.
+Linkage specified in the argument list takes precedence over the
+linkage specified in the HASH.
+
+The command line options are taken from array @ARGV. Upon completion
+of GetOptions, @ARGV will contain the rest (i.e. the non-options) of
+the command line.
+
+Each option specifier designates the name of the option, optionally
+followed by an argument specifier.
+
+Options that do not take arguments will have no argument specifier.
+The option variable will be set to 1 if the option is used.
+
+For the other options, the values for argument specifiers are:
+
+=over 8
+
+=item !
+
+Option does not take an argument and may be negated, i.e. prefixed by
+"no". E.g. "foo!" will allow B<--foo> (with value 1) and B<-nofoo>
+(with value 0).
+The option variable will be set to 1, or 0 if negated.
+
+=item +
+
+Option does not take an argument and will be incremented by 1 every
+time it appears on the command line. E.g. "more+", when used with
+B<--more --more --more>, will set the option variable to 3 (provided
+it was 0 or undefined at first).
+
+The B<+> specifier is ignored if the option destination is not a SCALAR.
+
+=item =s
+
+Option takes a mandatory string argument.
+This string will be assigned to the option variable.
+Note that even if the string argument starts with B<-> or B<-->, it
+will not be considered an option on itself.
+
+=item :s
+
+Option takes an optional string argument.
+This string will be assigned to the option variable.
+If omitted, it will be assigned "" (an empty string).
+If the string argument starts with B<-> or B<-->, it
+will be considered an option on itself.
+
+=item =i
+
+Option takes a mandatory integer argument.
+This value will be assigned to the option variable.
+Note that the value may start with B<-> to indicate a negative
+value.
+
+=item :i
+
+Option takes an optional integer argument.
+This value will be assigned to the option variable.
+If omitted, the value 0 will be assigned.
+Note that the value may start with B<-> to indicate a negative
+value.
+
+=item =f
+
+Option takes a mandatory real number argument.
+This value will be assigned to the option variable.
+Note that the value may start with B<-> to indicate a negative
+value.
+
+=item :f
+
+Option takes an optional real number argument.
+This value will be assigned to the option variable.
+If omitted, the value 0 will be assigned.
+
+=back
+
+A lone dash B<-> is considered an option, the corresponding option
+name is the empty string.
+
+A double dash on itself B<--> signals end of the options list.
+
+=head2 Linkage specification
+
+The linkage specifier is optional. If no linkage is explicitly
+specified but a ref HASH is passed, GetOptions will place the value in
+the HASH. For example:
+
+ %optctl = ();
+ GetOptions (\%optctl, "size=i");
+
+will perform the equivalent of the assignment
+
+ $optctl{"size"} = 24;
+
+For array options, a reference to an array is used, e.g.:
+
+ %optctl = ();
+ GetOptions (\%optctl, "sizes=i@");
+
+with command line "-sizes 24 -sizes 48" will perform the equivalent of
+the assignment
+
+ $optctl{"sizes"} = [24, 48];
+
+For hash options (an option whose argument looks like "name=value"),
+a reference to a hash is used, e.g.:
+
+ %optctl = ();
+ GetOptions (\%optctl, "define=s%");
+
+with command line "--define foo=hello --define bar=world" will perform the
+equivalent of the assignment
+
+ $optctl{"define"} = {foo=>'hello', bar=>'world')
+
+If no linkage is explicitly specified and no ref HASH is passed,
+GetOptions will put the value in a global variable named after the
+option, prefixed by "opt_". To yield a usable Perl variable,
+characters that are not part of the syntax for variables are
+translated to underscores. For example, "--fpp-struct-return" will set
+the variable $opt_fpp_struct_return. Note that this variable resides
+in the namespace of the calling program, not necessarily B<main>.
+For example:
+
+ GetOptions ("size=i", "sizes=i@");
+
+with command line "-size 10 -sizes 24 -sizes 48" will perform the
+equivalent of the assignments
+
+ $opt_size = 10;
+ @opt_sizes = (24, 48);
+
+A lone dash B<-> is considered an option, the corresponding Perl
+identifier is $opt_ .
+
+The linkage specifier can be a reference to a scalar, a reference to
+an array, a reference to a hash or a reference to a subroutine.
+
+Note that, if your code is running under the recommended C<use strict
+'vars'> pragma, it may be helpful to declare these package variables
+via C<use vars> perhaps something like this:
+
+ use vars qw/ $opt_size @opt_sizes $opt_bar /;
+
+If a REF SCALAR is supplied, the new value is stored in the referenced
+variable. If the option occurs more than once, the previous value is
+overwritten.
+
+If a REF ARRAY is supplied, the new value is appended (pushed) to the
+referenced array.
+
+If a REF HASH is supplied, the option value should look like "key" or
+"key=value" (if the "=value" is omitted then a value of 1 is implied).
+In this case, the element of the referenced hash with the key "key"
+is assigned "value".
+
+If a REF CODE is supplied, the referenced subroutine is called with
+two arguments: the option name and the option value.
+The option name is always the true name, not an abbreviation or alias.
+
+=head2 Aliases and abbreviations
+
+The option name may actually be a list of option names, separated by
+"|"s, e.g. "foo|bar|blech=s". In this example, "foo" is the true name
+of this option. If no linkage is specified, options "foo", "bar" and
+"blech" all will set $opt_foo. For convenience, the single character
+"?" is allowed as an alias, e.g. "help|?".
+
+Option names may be abbreviated to uniqueness, depending on
+configuration option B<auto_abbrev>.
+
+=head2 Non-option call-back routine
+
+A special option specifier, E<lt>E<gt>, can be used to designate a subroutine
+to handle non-option arguments. GetOptions will immediately call this
+subroutine for every non-option it encounters in the options list.
+This subroutine gets the name of the non-option passed.
+This feature requires configuration option B<permute>, see section
+CONFIGURATION OPTIONS.
+
+See also the examples.
+
+=head2 Option starters
+
+On the command line, options can start with B<-> (traditional), B<-->
+(POSIX) and B<+> (GNU, now being phased out). The latter is not
+allowed if the environment variable B<POSIXLY_CORRECT> has been
+defined.
+
+Options that start with "--" may have an argument appended, separated
+with an "=", e.g. "--foo=bar".
+
+=head2 Return values and Errors
+
+Configuration errors and errors in the option definitions are
+signalled using C<die()> and will terminate the calling
+program unless the call to C<Getopt::Long::GetOptions()> was embedded
+in C<eval { ... }> or C<die()> was trapped using C<$SIG{__DIE__}>.
+
+A return value of 1 (true) indicates success.
+
+A return status of 0 (false) indicates that the function detected one
+or more errors during option parsing. These errors are signalled using
+C<warn()> and can be trapped with C<$SIG{__WARN__}>.
+
+Errors that can't happen are signalled using C<Carp::croak()>.
+
+=head1 COMPATIBILITY
+
+Getopt::Long::GetOptions() is the successor of
+B<newgetopt.pl> that came with Perl 4. It is fully upward compatible.
+In fact, the Perl 5 version of newgetopt.pl is just a wrapper around
+the module.
+
+If an "@" sign is appended to the argument specifier, the option is
+treated as an array. Value(s) are not set, but pushed into array
+@opt_name. If explicit linkage is supplied, this must be a reference
+to an ARRAY.
+
+If an "%" sign is appended to the argument specifier, the option is
+treated as a hash. Value(s) of the form "name=value" are set by
+setting the element of the hash %opt_name with key "name" to "value"
+(if the "=value" portion is omitted it defaults to 1). If explicit
+linkage is supplied, this must be a reference to a HASH.
+
+If configuration option B<getopt_compat> is set (see section
+CONFIGURATION OPTIONS), options that start with "+" or "-" may also
+include their arguments, e.g. "+foo=bar". This is for compatiblity
+with older implementations of the GNU "getopt" routine.
+
+If the first argument to GetOptions is a string consisting of only
+non-alphanumeric characters, it is taken to specify the option starter
+characters. Everything starting with one of these characters from the
+starter will be considered an option. B<Using a starter argument is
+strongly deprecated.>
+
+For convenience, option specifiers may have a leading B<-> or B<-->,
+so it is possible to write:
+
+ GetOptions qw(-foo=s --bar=i --ar=s);
+
+=head1 EXAMPLES
+
+If the option specifier is "one:i" (i.e. takes an optional integer
+argument), then the following situations are handled:
+
+ -one -two -> $opt_one = '', -two is next option
+ -one -2 -> $opt_one = -2
+
+Also, assume specifiers "foo=s" and "bar:s" :
+
+ -bar -xxx -> $opt_bar = '', '-xxx' is next option
+ -foo -bar -> $opt_foo = '-bar'
+ -foo -- -> $opt_foo = '--'
+
+In GNU or POSIX format, option names and values can be combined:
+
+ +foo=blech -> $opt_foo = 'blech'
+ --bar= -> $opt_bar = ''
+ --bar=-- -> $opt_bar = '--'
+
+Example of using variable references:
+
+ $ret = GetOptions ('foo=s', \$foo, 'bar=i', 'ar=s', \@ar);
+
+With command line options "-foo blech -bar 24 -ar xx -ar yy"
+this will result in:
+
+ $foo = 'blech'
+ $opt_bar = 24
+ @ar = ('xx','yy')
+
+Example of using the E<lt>E<gt> option specifier:
+
+ @ARGV = qw(-foo 1 bar -foo 2 blech);
+ GetOptions("foo=i", \$myfoo, "<>", \&mysub);
+
+Results:
+
+ mysub("bar") will be called (with $myfoo being 1)
+ mysub("blech") will be called (with $myfoo being 2)
+
+Compare this with:
+
+ @ARGV = qw(-foo 1 bar -foo 2 blech);
+ GetOptions("foo=i", \$myfoo);
+
+This will leave the non-options in @ARGV:
+
+ $myfoo -> 2
+ @ARGV -> qw(bar blech)
+
+=head1 CONFIGURATION OPTIONS
+
+B<GetOptions> can be configured by calling subroutine
+B<Getopt::Long::Configure>. This subroutine takes a list of quoted
+strings, each specifying a configuration option to be set, e.g.
+B<ignore_case>. Options can be reset by prefixing with B<no_>, e.g.
+B<no_ignore_case>. Case does not matter. Multiple calls to B<config>
+are possible.
+
+Previous versions of Getopt::Long used variables for the purpose of
+configuring. Although manipulating these variables still work, it
+is strongly encouraged to use the new B<config> routine. Besides, it
+is much easier.
+
+The following options are available:
+
+=over 12
+
+=item default
+
+This option causes all configuration options to be reset to their
+default values.
+
+=item auto_abbrev
+
+Allow option names to be abbreviated to uniqueness.
+Default is set unless environment variable
+POSIXLY_CORRECT has been set, in which case B<auto_abbrev> is reset.
+
+=item getopt_compat
+
+Allow '+' to start options.
+Default is set unless environment variable
+POSIXLY_CORRECT has been set, in which case B<getopt_compat> is reset.
+
+=item require_order
+
+Whether non-options are allowed to be mixed with
+options.
+Default is set unless environment variable
+POSIXLY_CORRECT has been set, in which case b<require_order> is reset.
+
+See also B<permute>, which is the opposite of B<require_order>.
+
+=item permute
+
+Whether non-options are allowed to be mixed with
+options.
+Default is set unless environment variable
+POSIXLY_CORRECT has been set, in which case B<permute> is reset.
+Note that B<permute> is the opposite of B<require_order>.
+
+If B<permute> is set, this means that
+
+ -foo arg1 -bar arg2 arg3
+
+is equivalent to
+
+ -foo -bar arg1 arg2 arg3
+
+If a non-option call-back routine is specified, @ARGV will always be
+empty upon succesful return of GetOptions since all options have been
+processed, except when B<--> is used:
+
+ -foo arg1 -bar arg2 -- arg3
+
+will call the call-back routine for arg1 and arg2, and terminate
+leaving arg2 in @ARGV.
+
+If B<require_order> is set, options processing
+terminates when the first non-option is encountered.
+
+ -foo arg1 -bar arg2 arg3
+
+is equivalent to
+
+ -foo -- arg1 -bar arg2 arg3
+
+=item bundling (default: reset)
+
+Setting this variable to a non-zero value will allow single-character
+options to be bundled. To distinguish bundles from long option names,
+long options must be introduced with B<--> and single-character
+options (and bundles) with B<->. For example,
+
+ ps -vax --vax
+
+would be equivalent to
+
+ ps -v -a -x --vax
+
+provided "vax", "v", "a" and "x" have been defined to be valid
+options.
+
+Bundled options can also include a value in the bundle; for strings
+this value is the rest of the bundle, but integer and floating values
+may be combined in the bundle, e.g.
+
+ scale -h24w80
+
+is equivalent to
+
+ scale -h 24 -w 80
+
+Note: resetting B<bundling> also resets B<bundling_override>.
+
+=item bundling_override (default: reset)
+
+If B<bundling_override> is set, bundling is enabled as with
+B<bundling> but now long option names override option bundles. In the
+above example, B<-vax> would be interpreted as the option "vax", not
+the bundle "v", "a", "x".
+
+Note: resetting B<bundling_override> also resets B<bundling>.
+
+B<Note:> Using option bundling can easily lead to unexpected results,
+especially when mixing long options and bundles. Caveat emptor.
+
+=item ignore_case (default: set)
+
+If set, case is ignored when matching options.
+
+Note: resetting B<ignore_case> also resets B<ignore_case_always>.
+
+=item ignore_case_always (default: reset)
+
+When bundling is in effect, case is ignored on single-character
+options also.
+
+Note: resetting B<ignore_case_always> also resets B<ignore_case>.
+
+=item pass_through (default: reset)
+
+Unknown options are passed through in @ARGV instead of being flagged
+as errors. This makes it possible to write wrapper scripts that
+process only part of the user supplied options, and passes the
+remaining options to some other program.
+
+This can be very confusing, especially when B<permute> is also set.
+
+=item prefix
+
+The string that starts options. See also B<prefix_pattern>.
+
+=item prefix_pattern
+
+A Perl pattern that identifies the strings that introduce options.
+Default is C<(--|-|\+)> unless environment variable
+POSIXLY_CORRECT has been set, in which case it is C<(--|-)>.
+
+=item debug (default: reset)
+
+Enable copious debugging output.
+
+=back
+
+=head1 OTHER USEFUL VARIABLES
+
+=over 12
+
+=item $Getopt::Long::VERSION
+
+The version number of this Getopt::Long implementation in the format
+C<major>.C<minor>. This can be used to have Exporter check the
+version, e.g.
+
+ use Getopt::Long 3.00;
+
+You can inspect $Getopt::Long::major_version and
+$Getopt::Long::minor_version for the individual components.
+
+=item $Getopt::Long::error
+
+Internal error flag. May be incremented from a call-back routine to
+cause options parsing to fail.
+
+=back
+
+=head1 AUTHOR
+
+Johan Vromans E<lt>jvromans@squirrel.nlE<gt>
+
+=head1 COPYRIGHT AND DISCLAIMER
+
+This program is Copyright 1990,1999 by Johan Vromans.
+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.
+
+If you do not have a copy of the GNU General Public License write to
+the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
+MA 02139, USA.
+
+=cut
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