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- # GetOpt::Long.pm -- Universal options parsing
-
- package Getopt::Long;
-
- # RCS Status : $Id: Long.pm,v 1.4 1997/05/19 20:25:55 neeri Exp $
- # Author : Johan Vromans
- # Created On : Tue Sep 11 15:00:12 1990
- # Last Modified By: Johan Vromans
- # Last Modified On: Wed Apr 16 16:27:33 1997
- # Update Count : 597
- # 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. 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 $Getopt::Long::error
-
- Internal error flag. May be incremented from a call-back routine to
- cause options parsing to fail.
-
- =back
-
- =cut
-
- ################ Copyright ################
-
- # This program is Copyright 1990,1997 by Johan Vromans.
- # This program is free software; you can redistribute it and/or
- # modify it under the terms of the GNU General Public License
- # as published by the Free Software Foundation; either version 2
- # of the License, or (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # If you do not have a copy of the GNU General Public License write to
- # the Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
- # MA 02139, USA.
-
- ################ Module Preamble ################
-
- use strict;
-
- BEGIN {
- require 5.003;
- use Exporter ();
- use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
- $VERSION = sprintf("%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/);
-
- @ISA = qw(Exporter);
- @EXPORT = qw(&GetOptions $REQUIRE_ORDER $PERMUTE $RETURN_IN_ORDER);
- %EXPORT_TAGS = ();
- @EXPORT_OK = qw();
- }
-
- use vars @EXPORT, @EXPORT_OK;
- # User visible variables.
- use vars qw($error $debug $major_version $minor_version);
- # Deprecated visible variables.
- use vars qw($autoabbrev $getopt_compat $ignorecase $bundling $order
- $passthrough);
-
- ################ 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 ################
-
- 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
- # Needed if linkage is omitted.
- %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: 1.4 $ ',
- "[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")
- if $debug;
-
- # Check for ref HASH as first argument.
- $userlinkage = undef;
- if ( ref($optionlist[0]) && ref($optionlist[0]) eq 'HASH' ) {
- $userlinkage = shift (@optionlist);
- }
-
- # See if the first element of the optionlist contains option
- # starter characters.
- if ( $optionlist[0] =~ /^\W+$/ ) {
- $genprefix = shift (@optionlist);
- # Turn into regexp.
- $genprefix =~ s/(\W)/\\$1/g;
- $genprefix = "[" . $genprefix . "]";
- }
-
- # Verify correctness of optionlist.
- %opctl = ();
- %bopctl = ();
- while ( @optionlist > 0 ) {
- my $opt = shift (@optionlist);
-
- # Strip leading prefix so people can specify "--foo=i" if they like.
- $opt = $' if $opt =~ /^($genprefix)+/;
-
- if ( $opt eq '<>' ) {
- if ( (defined $userlinkage)
- && !(@optionlist > 0 && ref($optionlist[0]))
- && (exists $userlinkage->{$opt})
- && ref($userlinkage->{$opt}) ) {
- unshift (@optionlist, $userlinkage->{$opt});
- }
- unless ( @optionlist > 0
- && ref($optionlist[0]) && ref($optionlist[0]) eq 'CODE' ) {
- warn ("Option spec <> requires a reference to a subroutine\n");
- $error++;
- next;
- }
- $linkage{'<>'} = shift (@optionlist);
- next;
- }
-
- if ( $opt !~ /^(\w+[-\w|]*)?(!|[=:][infse][@%]?)?$/ ) {
- warn ("Error in option spec: \"", $opt, "\"\n");
- $error++;
- next;
- }
- my ($o, $c, $a) = ($1, $2);
- $c = '' unless defined $c;
-
- if ( ! defined $o ) {
- # empty -> '-' option
- $opctl{$o = ''} = $c;
- }
- else {
- # Handle alias names
- my @o = split (/\|/, $o);
- my $linko = $o = $o[0];
- # Force an alias if the option name is not locase.
- $a = $o unless $o eq lc($o);
- $o = lc ($o)
- if $ignorecase > 1
- || ($ignorecase
- && ($bundling ? length($o) > 1 : 1));
-
- foreach ( @o ) {
- if ( $bundling && length($_) == 1 ) {
- $_ = lc ($_) if $ignorecase > 1;
- if ( $c eq '!' ) {
- $opctl{"no$_"} = $c;
- warn ("Ignoring '!' modifier for short option $_\n");
- $c = '';
- }
- $opctl{$_} = $bopctl{$_} = $c;
- }
- else {
- $_ = lc ($_) if $ignorecase;
- if ( $c eq '!' ) {
- $opctl{"no$_"} = $c;
- $c = '';
- }
- $opctl{$_} = $c;
- }
- if ( defined $a ) {
- # Note alias.
- $aliases{$_} = $a;
- }
- else {
- # Set primary name.
- $a = $_;
- }
- }
- $o = $linko;
- }
-
- # If no linkage is supplied in the @optionlist, copy it from
- # the userlinkage if available.
- if ( defined $userlinkage ) {
- unless ( @optionlist > 0 && ref($optionlist[0]) ) {
- if ( exists $userlinkage->{$o} && ref($userlinkage->{$o}) ) {
- print STDERR ("=> found userlinkage for \"$o\": ",
- "$userlinkage->{$o}\n")
- if $debug;
- unshift (@optionlist, $userlinkage->{$o});
- }
- else {
- # Do nothing. Being undefined will be handled later.
- next;
- }
- }
- }
-
- # Copy the linkage. If omitted, link to global variable.
- if ( @optionlist > 0 && ref($optionlist[0]) ) {
- print STDERR ("=> link \"$o\" to $optionlist[0]\n")
- if $debug;
- if ( ref($optionlist[0]) =~ /^(SCALAR|CODE)$/ ) {
- $linkage{$o} = shift (@optionlist);
- }
- elsif ( ref($optionlist[0]) =~ /^(ARRAY)$/ ) {
- $linkage{$o} = shift (@optionlist);
- $opctl{$o} .= '@'
- if $opctl{$o} ne '' and $opctl{$o} !~ /\@$/;
- $bopctl{$o} .= '@'
- if $bundling 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} !~ /\%$/;
- }
- else {
- warn ("Invalid option linkage for \"", $opt, "\"\n");
- $error++;
- }
- }
- else {
- # Link to global $opt_XXX variable.
- # Make sure a valid perl identifier results.
- my $ov = $o;
- $ov =~ s/\W/_/g;
- if ( $c =~ /@/ ) {
- print STDERR ("=> link \"$o\" to \@$pkg","::opt_$ov\n")
- if $debug;
- eval ("\$linkage{\$o} = \\\@".$pkg."::opt_$ov;");
- }
- elsif ( $c =~ /%/ ) {
- print STDERR ("=> link \"$o\" to \%$pkg","::opt_$ov\n")
- if $debug;
- eval ("\$linkage{\$o} = \\\%".$pkg."::opt_$ov;");
- }
- else {
- print STDERR ("=> link \"$o\" to \$$pkg","::opt_$ov\n")
- if $debug;
- eval ("\$linkage{\$o} = \\\$".$pkg."::opt_$ov;");
- }
- }
- }
-
- # Bail out if errors found.
- return 0 if $error;
-
- # Sort the possible long option names.
- @opctl = sort(keys (%opctl)) if $autoabbrev;
-
- # Show the options tables if debugging.
- if ( $debug ) {
- my ($arrow, $k, $v);
- $arrow = "=> ";
- while ( ($k,$v) = each(%opctl) ) {
- print STDERR ($arrow, "\$opctl{\"$k\"} = \"$v\"\n");
- $arrow = " ";
- }
- $arrow = "=> ";
- while ( ($k,$v) = each(%bopctl) ) {
- print STDERR ($arrow, "\$bopctl{\"$k\"} = \"$v\"\n");
- $arrow = " ";
- }
- }
-
- # Process argument list
- while ( @ARGV > 0 ) {
-
- #### Get next argument ####
-
- $opt = shift (@ARGV);
- $arg = undef;
- $array = $hash = 0;
- print STDERR ("=> option \"", $opt, "\"\n") if $debug;
-
- #### Determine what we have ####
-
- # Double dash is option list terminator.
- if ( $opt eq $argend ) {
- # Finish. Push back accumulated arguments and return.
- unshift (@ARGV, @ret)
- if $order == $PERMUTE;
- return ($error == 0);
- }
-
- my $tryopt = $opt;
-
- # find_option operates on the GLOBAL $opt and $arg!
- if ( &$find_option () ) {
-
- # find_option undefines $opt in case of errors.
- next unless defined $opt;
-
- if ( defined $arg ) {
- $opt = $aliases{$opt} if defined $aliases{$opt};
-
- if ( defined $linkage{$opt} ) {
- print STDERR ("=> ref(\$L{$opt}) -> ",
- ref($linkage{$opt}), "\n") if $debug;
-
- if ( ref($linkage{$opt}) eq 'SCALAR' ) {
- print STDERR ("=> \$\$L{$opt} = \"$arg\"\n") if $debug;
- ${$linkage{$opt}} = $arg;
- }
- elsif ( ref($linkage{$opt}) eq 'ARRAY' ) {
- print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
- if $debug;
- push (@{$linkage{$opt}}, $arg);
- }
- elsif ( ref($linkage{$opt}) eq 'HASH' ) {
- print STDERR ("=> \$\$L{$opt}->{$key} = \"$arg\"\n")
- if $debug;
- $linkage{$opt}->{$key} = $arg;
- }
- elsif ( ref($linkage{$opt}) eq 'CODE' ) {
- print STDERR ("=> &L{$opt}(\"$opt\", \"$arg\")\n")
- if $debug;
- &{$linkage{$opt}}($opt, $arg);
- }
- else {
- print STDERR ("Invalid REF type \"", ref($linkage{$opt}),
- "\" in linkage\n");
- die ("Getopt::Long -- internal error!\n");
- }
- }
- # No entry in linkage means entry in userlinkage.
- elsif ( $array ) {
- if ( defined $userlinkage->{$opt} ) {
- print STDERR ("=> push(\@{\$L{$opt}}, \"$arg\")\n")
- if $debug;
- push (@{$userlinkage->{$opt}}, $arg);
- }
- else {
- print STDERR ("=>\$L{$opt} = [\"$arg\"]\n")
- if $debug;
- $userlinkage->{$opt} = [$arg];
- }
- }
- elsif ( $hash ) {
- if ( defined $userlinkage->{$opt} ) {
- print STDERR ("=> \$L{$opt}->{$key} = \"$arg\"\n")
- if $debug;
- $userlinkage->{$opt}->{$key} = $arg;
- }
- else {
- print STDERR ("=>\$L{$opt} = {$key => \"$arg\"}\n")
- if $debug;
- $userlinkage->{$opt} = {$key => $arg};
- }
- }
- else {
- print STDERR ("=>\$L{$opt} = \"$arg\"\n") if $debug;
- $userlinkage->{$opt} = $arg;
- }
- }
- }
-
- # Not an option. Save it if we $PERMUTE and don't have a <>.
- elsif ( $order == $PERMUTE ) {
- # Try non-options call-back.
- my $cb;
- if ( (defined ($cb = $linkage{'<>'})) ) {
- &$cb($tryopt);
- }
- else {
- print STDERR ("=> saving \"$tryopt\" ",
- "(not an option, may permute)\n") if $debug;
- push (@ret, $tryopt);
- }
- next;
- }
-
- # ...otherwise, terminate.
- else {
- # Push this one back and exit.
- unshift (@ARGV, $tryopt);
- return ($error == 0);
- }
-
- }
-
- # Finish.
- if ( $order == $PERMUTE ) {
- # Push back accumulated arguments
- print STDERR ("=> restoring \"", join('" "', @ret), "\"\n")
- if $debug && @ret > 0;
- unshift (@ARGV, @ret) if @ret > 0;
- }
-
- return ($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\"")
- }
- }
- }
-
- # 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;
- }
-
- ################ Private Subroutines ################
-
- $find_option = sub {
-
- return 0 unless $opt =~ /^$genprefix/;
-
- $opt = $';
- my ($starter) = $&;
-
- 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 =~ /^([^=]+)=/ ) {
- $opt = $1;
- $optarg = $';
- print STDERR ("=> option \"", $opt,
- "\", optarg = \"$optarg\"\n") if $debug;
- }
-
- #### Look it up ###
-
- my $tryopt = $opt; # option to try
- my $optbl = \%opctl; # table to look it up (long names)
- my $type;
-
- if ( $bundling && $starter eq '-' ) {
- # Unbundle single letter option.
- $rest = substr ($tryopt, 1);
- $tryopt = substr ($tryopt, 0, 1);
- $tryopt = lc ($tryopt) if $ignorecase > 1;
- 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
-
- # If bundling == 2, long options can override bundles.
- if ( $bundling == 2 and
- defined ($type = $opctl{$tryopt.$rest}) ) {
- print STDERR ("=> $starter$tryopt rebundled to ",
- "$starter$tryopt$rest\n") if $debug;
- $tryopt .= $rest;
- undef $rest;
- }
- }
-
- # Try auto-abbreviation.
- elsif ( $autoabbrev ) {
- # Downcase if allowed.
- $tryopt = $opt = lc ($opt) if $ignorecase;
- # Turn option name into pattern.
- my $pat = quotemeta ($opt);
- # Look up in option names.
- my @hits = grep (/^$pat/, @opctl);
- print STDERR ("=> ", scalar(@hits), " hits (@hits) with \"$pat\" ",
- "out of ", scalar(@opctl), "\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 $aliases{$_};
- $hit{$_} = 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");
- $error++;
- undef $opt;
- return 1;
- }
- @hits = keys(%hit);
- }
-
- # Complete the option name, if appropriate.
- if ( @hits == 1 && $hits[0] ne $opt ) {
- $tryopt = $hits[0];
- $tryopt = lc ($tryopt) if $ignorecase;
- print STDERR ("=> option \"$opt\" -> \"$tryopt\"\n")
- if $debug;
- }
- }
-
- # Map to all lowercase if ignoring case.
- elsif ( $ignorecase ) {
- $tryopt = lc ($opt);
- }
-
- # Check validity by fetching the info.
- $type = $optbl->{$tryopt} unless defined $type;
- unless ( defined $type ) {
- return 0 if $passthrough;
- warn ("Unknown option: ", $opt, "\n");
- $error++;
- return 1;
- }
- # Apparently valid.
- $opt = $tryopt;
- print STDERR ("=> found \"$type\" for ", $opt, "\n") if $debug;
-
- #### Determine argument status ####
-
- # If it is an option w/o argument, we're almost finished with it.
- if ( $type eq '' || $type eq '!' ) {
- if ( defined $optarg ) {
- return 0 if $passthrough;
- print STDERR ("Option ", $opt, " does not take an argument\n");
- $error++;
- undef $opt;
- }
- elsif ( $type eq '' ) {
- $arg = 1; # supply explicit value
- }
- else {
- substr ($opt, 0, 2) = ''; # strip NO prefix
- $arg = 0; # supply explicit value
- }
- unshift (@ARGV, $starter.$rest) if defined $rest;
- return 1;
- }
-
- # Get mandatory status and type info.
- my $mand;
- ($mand, $type, $array, $hash) = $type =~ /^(.)(.)(@?)(%?)$/;
-
- # 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");
- $error++;
- undef $opt;
- }
- if ( $mand eq ":" ) {
- $arg = $type eq "s" ? '' : 0;
- }
- return 1;
- }
-
- # Get (possibly optional) argument.
- $arg = (defined $rest ? $rest
- : (defined $optarg ? $optarg : shift (@ARGV)));
-
- # 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);
- }
-
- #### Check if the argument is valid for this option ####
-
- if ( $type eq "s" ) { # string
- # A mandatory string takes anything.
- return 1 if $mand eq "=";
-
- # An optional string takes almost anything.
- return 1 if defined $optarg || defined $rest;
- return 1 if $arg eq "-"; # ??
-
- # Check for option or option list terminator.
- if ($arg eq $argend ||
- $arg =~ /^$genprefix.+/) {
- # Push back.
- unshift (@ARGV, $arg);
- # Supply empty value.
- $arg = '';
- }
- }
-
- elsif ( $type eq "n" || $type eq "i" ) { # numeric/integer
- if ( $arg !~ /^-?[0-9]+$/ ) {
- if ( defined $optarg || $mand eq "=" ) {
- return 0 if $passthrough;
- print STDERR ("Value \"", $arg, "\" invalid for option ",
- $opt, " (number expected)\n");
- $error++;
- undef $opt;
- # Push back.
- unshift (@ARGV, $starter.$rest) if defined $rest;
- }
- else {
- # Push back.
- unshift (@ARGV, defined $rest ? $starter.$rest : $arg);
- # Supply default value.
- $arg = 0;
- }
- }
- }
-
- elsif ( $type eq "f" ) { # real number, int is also ok
- if ( $arg !~ /^-?[0-9.]+([eE]-?[0-9]+)?$/ ) {
- if ( defined $optarg || $mand eq "=" ) {
- return 0 if $passthrough;
- print STDERR ("Value \"", $arg, "\" invalid for option ",
- $opt, " (real number expected)\n");
- $error++;
- undef $opt;
- # Push back.
- unshift (@ARGV, $starter.$rest) if defined $rest;
- }
- else {
- # Push back.
- unshift (@ARGV, defined $rest ? $starter.$rest : $arg);
- # Supply default value.
- $arg = 0.0;
- }
- }
- }
- else {
- die ("GetOpt::Long internal error (Can't happen)\n");
- }
- return 1;
- };
-
- $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;
- }
- # 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) = $VERSION =~ /^(\d+)\.(\d+)/;
-
- # Set defaults.
- &$config_defaults ();
-
- ################ Package return ################
-
- 1;
-