-
package MooseX::Getopt;
-use Moose::Role;
-
-use MooseX::Getopt::OptionTypeMap;
-use MooseX::Getopt::Meta::Attribute;
-use MooseX::Getopt::Meta::Attribute::NoGetopt;
-
-use Getopt::Long (); # GLD uses it anyway, doesn't hurt
-use constant HAVE_GLD => not not eval { require Getopt::Long::Descriptive };
-
-our $VERSION = '0.10';
-our $AUTHORITY = 'cpan:STEVAN';
-
-has ARGV => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
-has extra_argv => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
-
-sub new_with_options {
- my ($class, @params) = @_;
-
- my %processed = $class->_parse_argv(
- options => [
- $class->_attrs_to_options( @params )
- ]
- );
-
- my $params = $processed{params};
-
- if($class->meta->does_role('MooseX::ConfigFromFile')) {
- my $configfile;
-
- if(defined $params->{configfile}) {
- $configfile = $params->{configfile}
- }
- else {
- my $cfmeta = $class->meta->get_attribute('configfile');
- $configfile = $cfmeta->default if $cfmeta->has_default;
- }
-
- if(defined $configfile) {
- %$params = (
- %{$class->get_config_from_file($configfile)},
- %$params,
- );
- }
- }
-
- $class->new(
- ARGV => $processed{argv_copy},
- extra_argv => $processed{argv},
- @params, # explicit params to ->new
- %$params, # params from CLI
- );
-}
-
-sub _parse_argv {
- my ( $class, %params ) = @_;
-
- local @ARGV = @{ $params{argv} || \@ARGV };
-
- my ( $opt_spec, $name_to_init_arg ) = ( HAVE_GLD ? $class->_gld_spec(%params) : $class->_traditional_spec(%params) );
-
- # Get a clean copy of the original @ARGV
- my $argv_copy = [ @ARGV ];
-
- my @err;
-
- my ( $parsed_options, $usage ) = eval {
- local $SIG{__WARN__} = sub { push @err, @_ };
-
- if ( HAVE_GLD ) {
- return Getopt::Long::Descriptive::describe_options($class->_usage_format(%params), @$opt_spec);
- } else {
- my %options;
- Getopt::Long::GetOptions(\%options, @$opt_spec);
- return ( \%options, undef );
- }
- };
-
- die join "", grep { defined } @err, $@ if @err or $@;
-
- # Get a copy of the Getopt::Long-mangled @ARGV
- my $argv_mangled = [ @ARGV ];
-
- my %constructor_args = (
- map {
- $name_to_init_arg->{$_} => $parsed_options->{$_}
- } keys %$parsed_options,
- );
-
- return (
- params => \%constructor_args,
- argv_copy => $argv_copy,
- argv => $argv_mangled,
- ( defined($usage) ? ( usage => $usage ) : () ),
- );
-}
-
-sub _usage_format {
- return "usage: %c %o";
-}
-
-sub _traditional_spec {
- my ( $class, %params ) = @_;
-
- my ( @options, %name_to_init_arg, %options );
-
- foreach my $opt ( @{ $params{options} } ) {
- push @options, $opt->{opt_string};
- $name_to_init_arg{ $opt->{name} } = $opt->{init_arg};
- }
-
- return ( \@options, \%name_to_init_arg );
-}
-
-sub _gld_spec {
- my ( $class, %params ) = @_;
-
- my ( @options, %name_to_init_arg );
-
- foreach my $opt ( @{ $params{options} } ) {
- push @options, [
- $opt->{opt_string},
- $opt->{doc} || ' ', # FIXME new GLD shouldn't need this hack
- {
- ( $opt->{required} ? (required => $opt->{required}) : () ),
- ( exists $opt->{default} ? (default => $opt->{default}) : () ),
- },
- ];
-
- $name_to_init_arg{ $opt->{name} } = $opt->{init_arg};
- }
-
- return ( \@options, \%name_to_init_arg );
-}
-
-sub _compute_getopt_attrs {
- my $class = shift;
- grep {
- $_->isa("MooseX::Getopt::Meta::Attribute")
- or
- $_->name !~ /^_/
- &&
- !$_->isa('MooseX::Getopt::Meta::Attribute::NoGetopt')
- } $class->meta->compute_all_applicable_attributes
-}
-
-sub _attrs_to_options {
- my $class = shift;
-
- my @options;
+# ABSTRACT: A Moose role for processing command line options
- foreach my $attr ($class->_compute_getopt_attrs) {
- my $name = $attr->name;
+use Moose::Role 0.56;
- my $aliases;
+with 'MooseX::Getopt::GLD';
- if ($attr->isa('MooseX::Getopt::Meta::Attribute')) {
- $name = $attr->cmd_flag if $attr->has_cmd_flag;
- $aliases = $attr->cmd_aliases if $attr->has_cmd_aliases;
- }
+no Moose::Role;
- my $opt_string = $aliases
- ? join(q{|}, $name, @$aliases)
- : $name;
-
- if ($attr->has_type_constraint) {
- my $type_name = $attr->type_constraint->name;
- if (MooseX::Getopt::OptionTypeMap->has_option_type($type_name)) {
- $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type_name)
- }
- }
-
- push @options, {
- name => $name,
- init_arg => $attr->init_arg,
- opt_string => $opt_string,
- required => $attr->is_required,
- ( ( $attr->has_default && ( $attr->is_default_a_coderef xor $attr->is_lazy ) ) ? ( default => $attr->default({}) ) : () ),
- ( $attr->has_documentation ? ( doc => $attr->documentation ) : () ),
- }
- }
-
- return @options;
-}
-
-no Moose::Role; 1;
-
-__END__
-
-=pod
-
-=head1 NAME
-
-MooseX::Getopt - A Moose role for processing command line options
+1;
=head1 SYNOPSIS
- ## In your class
+ ## In your class
package My::App;
use Moose;
-
+
with 'MooseX::Getopt';
-
+
has 'out' => (is => 'rw', isa => 'Str', required => 1);
has 'in' => (is => 'rw', isa => 'Str', required => 1);
-
+
# ... rest of the class here
-
+
## in your script
#!/usr/bin/perl
-
+
use My::App;
-
+
my $app = My::App->new_with_options();
# ... rest of the script here
-
+
## on the command line
% perl my_app_script.pl -in file.input -out file.dump
=head1 DESCRIPTION
-This is a role which provides an alternate constructor for creating
-objects using parameters passed in from the command line.
+This is a role which provides an alternate constructor for creating
+objects using parameters passed in from the command line.
-This module attempts to DWIM as much as possible with the command line
-params by introspecting your class's attributes. It will use the name
-of your attribute as the command line option, and if there is a type
+This module attempts to DWIM as much as possible with the command line
+params by introspecting your class's attributes. It will use the name
+of your attribute as the command line option, and if there is a type
constraint defined, it will configure Getopt::Long to handle the option
accordingly.
-You can use the attribute metaclass L<MooseX::Getopt::Meta::Attribute>
-to get non-default commandline option names and aliases.
+You can use the trait L<MooseX::Getopt::Meta::Attribute::Trait> or the
+attribute metaclass L<MooseX::Getopt::Meta::Attribute> to get non-default
+commandline option names and aliases.
-You can use the attribute metaclass L<MooseX::Getopt::Meta::Attribute::NoGetOpt>
+You can use the trait L<MooseX::Getopt::Meta::Attribute::Trait::NoGetopt>
+or the attribute metaclass L<MooseX::Getopt::Meta::Attribute::NoGetopt>
to have C<MooseX::Getopt> ignore your attribute in the commandline options.
By default, attributes which start with an underscore are not given
commandline argument support, unless the attribute's metaclass is set
-to L<MooseX::Getopt::Meta::Attribute>. If you don't want you accessors
-to have the leading underscore in thier name, you can do this:
+to L<MooseX::Getopt::Meta::Attribute>. If you don't want your accessors
+to have the leading underscore in their name, you can do this:
# for read/write attributes
has '_foo' => (accessor => 'foo', ...);
-
+
# or for read-only attributes
- has '_bar' => (reader => 'bar', ...);
+ has '_bar' => (reader => 'bar', ...);
-This will mean that Getopt will not handle a --foo param, but your
-code can still call the C<foo> method.
+This will mean that Getopt will not handle a --foo param, but your
+code can still call the C<foo> method.
If your class also uses a configfile-loading role based on
L<MooseX::ConfigFromFile>, such as L<MooseX::SimpleConfig>,
given for the configfile attribute) for you.
Options specified in multiple places follow the following
-precendence order: commandline overrides configfile, which
+precedence order: commandline overrides configfile, which
overrides explicit new_with_options parameters.
=head2 Supported Type Constraints
=item I<Bool>
-A I<Bool> type constraint is set up as a boolean option with
+A I<Bool> type constraint is set up as a boolean option with
Getopt::Long. So that this attribute description:
has 'verbose' => (is => 'rw', isa => 'Bool');
-would translate into C<verbose!> as a Getopt::Long option descriptor,
+would translate into C<verbose!> as a Getopt::Long option descriptor,
which would enable the following command line options:
% my_script.pl --verbose
- % my_script.pl --noverbose
-
+ % my_script.pl --noverbose
+
=item I<Int>, I<Float>, I<Str>
-These type constraints are set up as properly typed options with
+These type constraints are set up as properly typed options with
Getopt::Long, using the C<=i>, C<=f> and C<=s> modifiers as appropriate.
=item I<ArrayRef>
in Getopt::Long. So that this attribute description:
has 'include' => (
- is => 'rw',
- isa => 'ArrayRef',
+ is => 'rw',
+ isa => 'ArrayRef',
default => sub { [] }
);
-would translate into C<includes=s@> as a Getopt::Long option descriptor,
+would translate into C<includes=s@> as a Getopt::Long option descriptor,
which would enable the following command line options:
% my_script.pl --include /usr/lib --include /usr/local/lib
in Getopt::Long. So that this attribute description:
has 'define' => (
- is => 'rw',
- isa => 'HashRef',
+ is => 'rw',
+ isa => 'HashRef',
default => sub { {} }
);
-would translate into C<define=s%> as a Getopt::Long option descriptor,
+would translate into C<define=s%> as a Getopt::Long option descriptor,
which would enable the following command line options:
% my_script.pl --define os=linux --define vendor=debian
=head2 Custom Type Constraints
-It is possible to create custom type constraint to option spec
+It is possible to create custom type constraint to option spec
mappings if you need them. The process is fairly simple (but a
-little verbose maybe). First you create a custom subtype, like
+little verbose maybe). First you create a custom subtype, like
so:
subtype 'ArrayOfInts'
'ArrayOfInts' => '=i@'
);
-Now any attribute declarations using this type constraint will
+Now any attribute declarations using this type constraint will
get the custom option spec. So that, this:
has 'nums' => (
% my_script.pl --nums 5 --nums 88 --nums 199
-This example is fairly trivial, but more complex validations are
+This example is fairly trivial, but more complex validations are
easily possible with a little creativity. The trick is balancing
the type constraint validations with the Getopt::Long validations.
like a normal C<ArrayRef> type for Getopt purposes (that is,
C<=s@>).
-=head1 METHODS
-
-=over 4
-
-=item B<new_with_options (%params)>
+=method B<new_with_options (%params)>
-This method will take a set of default C<%params> and then collect
+This method will take a set of default C<%params> and then collect
params from the command line (possibly overriding those in C<%params>)
and then return a newly constructed object.
+The special parameter C<argv>, if specified should point to an array
+reference with an array to use instead of C<@ARGV>.
+
If L<Getopt::Long/GetOptions> fails (due to invalid arguments),
C<new_with_options> will throw an exception.
-If you have L<Getopt::Long::Descriptive> a the C<usage> param is also passed to
-C<new>.
+If L<Getopt::Long::Descriptive> is installed and any of the following
+command line params are passed, the program will exit with usage
+information (and the option's state will be stored in the help_flag
+attribute). You can add descriptions for each option by including a
+B<documentation> option for each attribute to document.
+
+ -?
+ --?
+ -h
+ --help
+ --usage
+
+If you have L<Getopt::Long::Descriptive> the C<usage> param is also passed to
+C<new> as the usage option.
-=item B<ARGV>
+=method B<ARGV>
This accessor contains a reference to a copy of the C<@ARGV> array
as it originally existed at the time of C<new_with_options>.
-=item B<extra_argv>
+=method B<extra_argv>
This accessor contains an arrayref of leftover C<@ARGV> elements that
L<Getopt::Long> did not parse. Note that the real C<@ARGV> is left
un-mangled.
-=item B<meta>
+B<Important>: By default, L<Getopt::Long> will reject unrecognized I<options>
+(that is, options that do not correspond with attributes using the Getopt
+trait). To disable this, and allow options to also be saved in C<extra_argv> (for example to pass along to another class's C<new_with_options>), you can either enable the
+C<pass_through> option of L<Getopt::Long> for your class: C<< use Getopt::Long
+qw(:config pass_through); >> or specify a value for for L<MooseX::Getopt::GLD>'s C<getopt_conf> parameter.
-This returns the role meta object.
+=method B<usage>
-=back
+This accessor contains the L<Getopt::Long::Descriptive::Usage> object (if
+L<Getopt::Long::Descriptive> is used).
-=head1 BUGS
+=method B<help_flag>
-All complex software has bugs lurking in it, and this module is no
-exception. If you find a bug please either email me, or add the bug
-to cpan-RT.
+This accessor contains the boolean state of the --help, --usage and --?
+options (true if any of these options were passed on the command line).
-=head1 AUTHOR
+=method B<print_usage_text>
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
+This method is called internally when the C<help_flag> state is true.
+It prints the text from the C<usage> object (see above) to stdout and then the
+program terminates normally. You can apply a method modification (see
+L<Moose::Manual::MethodModifiers>) if different behaviour is desired, for
+example to include additional text.
-Brandon L. Black, E<lt>blblack@gmail.comE<gt>
+=method B<meta>
+
+This returns the role meta object.
-=head1 COPYRIGHT AND LICENSE
+=method B<process_argv (%params)>
-Copyright 2007 by Infinity Interactive, Inc.
+This does most of the work of C<new_with_options>, analyzing the parameters
+and argv, except for actually calling the constructor. It returns a
+L<MooseX::Getopt::ProcessedArgv> object. C<new_with_options> uses this
+method internally, so modifying this method via subclasses/roles will affect
+C<new_with_options>.
-L<http://www.iinteractive.com>
+=head2 More Customization Options
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+See L<Getopt::Long/Configuring Getopt::Long> for many other customizations you
+can make to how options are parsed. Simply C<use Getopt::Long qw(:config
+other_options...)> in your class to set these.
=cut
+
+=head1 SEE ALSO
+
+L<MooseX::Getopt::Usage>, an extension to generate man pages, with colour
+
projects / gitmo/MooseX-Getopt.git / blobdiff