package MooseX::Getopt;
use Moose::Role;
-use Getopt::Long ();
-
use MooseX::Getopt::OptionTypeMap;
use MooseX::Getopt::Meta::Attribute;
+use MooseX::Getopt::Meta::Attribute::NoGetopt;
+
+use Carp ();
+
+use Getopt::Long (); # GLD uses it anyway, doesn't hurt
+use constant HAVE_GLD => not not eval { require Getopt::Long::Descriptive };
-our $VERSION = '0.03';
+our $VERSION = '0.20';
our $AUTHORITY = 'cpan:STEVAN';
-has ARGV => (is => 'rw', isa => 'ArrayRef');
-has extra_argv => (is => 'rw', isa => 'ArrayRef');
+has ARGV => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
+has extra_argv => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
sub new_with_options {
- my ($class, %params) = @_;
+ my ($class, @params) = @_;
- my (@options, %name_to_init_arg);
- foreach my $attr ($class->meta->compute_all_applicable_attributes) {
- my $name = $attr->name;
+ my $config_from_file;
+ if($class->meta->does_role('MooseX::ConfigFromFile')) {
+ local @ARGV = @ARGV;
- my $aliases;
+ my $configfile;
+ my $opt_parser = Getopt::Long::Parser->new( config => [ qw( pass_through ) ] );
+ $opt_parser->getoptions( "configfile=s" => \$configfile );
- if ($attr->isa('MooseX::Getopt::Meta::Attribute')) {
- $name = $attr->cmd_flag if $attr->has_cmd_flag;
- $aliases = $attr->cmd_aliases if $attr->has_cmd_aliases;
+ if(!defined $configfile) {
+ my $cfmeta = $class->meta->find_attribute_by_name('configfile');
+ $configfile = $cfmeta->default if $cfmeta->has_default;
}
- else {
- next if $name =~ /^_/;
- }
-
- $name_to_init_arg{$name} = $attr->init_arg;
-
- 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);
- }
+
+ if(defined $configfile) {
+ $config_from_file = $class->get_config_from_file($configfile);
}
-
- push @options => $opt_string;
}
- my %options;
+ my $constructor_params = ( @params == 1 ? $params[0] : {@params} );
+
+ Carp::croak("Single parameters to new_with_options() must be a HASH ref")
+ unless ref($constructor_params) eq 'HASH';
+
+ my %processed = $class->_parse_argv(
+ options => [
+ $class->_attrs_to_options( $config_from_file )
+ ],
+ params => $constructor_params,
+ );
- # Get a clean copy of the original @ARGV
- my $argv_copy = [ @ARGV ];
+ my $params = $config_from_file ? { %$config_from_file, %{$processed{params}} } : $processed{params};
+ # did the user request usage information?
+ if ( $processed{usage} && ($params->{'?'} or $params->{help} or $params->{usage}) )
{
- local $SIG{__WARN__} = sub { die $_[0] };
- Getopt::Long::GetOptions(\%options, @options);
+ $processed{usage}->die();
}
+ $class->new(
+ ARGV => $processed{argv_copy},
+ extra_argv => $processed{argv},
+ %$constructor_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 $argv_mangled = [ @ARGV ];
- # Restore the original @ARGV;
- @ARGV = @$argv_copy;
-
- #use Data::Dumper;
- #warn Dumper \@options;
- #warn Dumper \%name_to_init_arg;
- #warn Dumper \%options;
-
- $class->new(
- ARGV => $argv_copy,
- extra_argv => $argv_mangled,
- %params,
- map {
- $name_to_init_arg{$_} => $options{$_}
- } keys %options,
+ 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};
+
+ my $identifier = $opt->{name};
+ $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names
+
+ $name_to_init_arg{$identifier} = $opt->{init_arg};
+ }
+
+ return ( \@options, \%name_to_init_arg );
+}
+
+sub _gld_spec {
+ my ( $class, %params ) = @_;
+
+ my ( @options, %name_to_init_arg );
+
+ my $constructor_params = $params{params};
+
+ foreach my $opt ( @{ $params{options} } ) {
+ push @options, [
+ $opt->{opt_string},
+ $opt->{doc} || ' ', # FIXME new GLD shouldn't need this hack
+ {
+ ( ( $opt->{required} && !exists($constructor_params->{$opt->{init_arg}}) ) ? (required => $opt->{required}) : () ),
+ # NOTE:
+ # remove this 'feature' because it didn't work
+ # all the time, and so is better to not bother
+ # since Moose will handle the defaults just
+ # fine anyway.
+ # - SL
+ #( exists $opt->{default} ? (default => $opt->{default}) : () ),
+ },
+ ];
+
+ my $identifier = $opt->{name};
+ $identifier =~ s/\W/_/g; # Getopt::Long does this to all option names
+
+ $name_to_init_arg{$identifier} = $opt->{init_arg};
+ }
+
+ return ( \@options, \%name_to_init_arg );
+}
+
+sub _compute_getopt_attrs {
+ my $class = shift;
+ grep {
+ $_->does("MooseX::Getopt::Meta::Attribute::Trait")
+ or
+ $_->name !~ /^_/
+ } grep {
+ !$_->does('MooseX::Getopt::Meta::Attribute::Trait::NoGetopt')
+ } $class->meta->get_all_attributes
+}
+
+sub _get_cmd_flags_for_attr {
+ my ( $class, $attr ) = @_;
+
+ my $flag = $attr->name;
+
+ my @aliases;
+
+ if ($attr->does('MooseX::Getopt::Meta::Attribute::Trait')) {
+ $flag = $attr->cmd_flag if $attr->has_cmd_flag;
+ @aliases = @{ $attr->cmd_aliases } if $attr->has_cmd_aliases;
+ }
+
+ return ( $flag, @aliases );
+}
+
+sub _attrs_to_options {
+ my $class = shift;
+ my $config_from_file = shift || {};
+
+ my @options;
+
+ foreach my $attr ($class->_compute_getopt_attrs) {
+ my ( $flag, @aliases ) = $class->_get_cmd_flags_for_attr($attr);
+
+ my $opt_string = join(q{|}, $flag, @aliases);
+
+ if ($attr->name eq 'configfile') {
+ $opt_string .= '=s';
+ }
+ elsif ($attr->has_type_constraint) {
+ my $type = $attr->type_constraint;
+ if (MooseX::Getopt::OptionTypeMap->has_option_type($type)) {
+ $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type)
+ }
+ }
+
+ push @options, {
+ name => $flag,
+ init_arg => $attr->init_arg,
+ opt_string => $opt_string,
+ required => $attr->is_required && !$attr->has_default && !$attr->has_builder && !exists $config_from_file->{$attr->name},
+ # NOTE:
+ # this "feature" was breaking because
+ # Getopt::Long::Descriptive would return
+ # the default value as if it was a command
+ # line flag, which would then override the
+ # one passed into a constructor.
+ # See 100_gld_default_bug.t for an example
+ # - SL
+ #( ( $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;
=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 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>,
+L<MooseX::Getopt>'s C<new_with_options> will load the configfile
+specified by the C<--configfile> option (or the default you've
+given for the configfile attribute) for you.
+
+Options specified in multiple places follow the following
+precendence 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.
=item 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 L<Getopt::Long::Descriptive> is installed and any of the following
+command line params are passed, the program will exit with usage
+information. You can add descriptions for each option by including a
+B<documentation> option for each attribute to document.
+
+ --?
+ --help
+ --usage
+
+If you have L<Getopt::Long::Descriptive> the C<usage> param is also passed to
+C<new>.
+
=item B<ARGV>
This accessor contains a reference to a copy of the C<@ARGV> array
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+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.
Brandon L. Black, E<lt>blblack@gmail.comE<gt>
+Yuval Kogman, E<lt>nothingmuch@woobling.orgE<gt>
+
+=head1 CONTRIBUTORS
+
+Ryan D Johnson, E<lt>ryan@innerfence.comE<gt>
+
+Drew Taylor, E<lt>drew@drewtaylor.comE<gt>
+
=head1 COPYRIGHT AND LICENSE
-Copyright 2007 by Infinity Interactive, Inc.
+Copyright 2007-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
projects / gitmo/MooseX-Getopt.git / blobdiff