* Handling with Getopt parser implemented as strategy pattern.

[gitmo/MooseX-Getopt.git] / lib / MooseX / Getopt.pm

diff --git a/lib/MooseX/Getopt.pm b/lib/MooseX/Getopt.pm
index 59e32a7..3a087cf 100644 (file)
--- a/lib/MooseX/Getopt.pm
+++ b/lib/MooseX/Getopt.pm
@@ -2,23 +2,57 @@
 package MooseX::Getopt;
 use Moose::Role;
 
+use Moose::Util::TypeConstraints;
+
 use MooseX::Getopt::OptionTypeMap;
+
+use MooseX::Getopt::Parser::Long;
+use maybe 'MooseX::Getopt::Parser::Descriptive';
+
 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   = '0.15';
 our $AUTHORITY = 'cpan:STEVAN';
 
-has ARGV       => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
-has extra_argv => (is => 'rw', isa => 'ArrayRef', metaclass => "NoGetopt");
+
+has ARGV => (
+    is => 'rw',
+    isa => 'ArrayRef',
+    metaclass => 'NoGetopt',
+);
+
+has extra_argv => (
+    is => 'rw',
+    isa => 'ArrayRef',
+    metaclass => 'NoGetopt',
+);
+
+has getopt_parser => (
+    is => 'rw',
+    does => 'MooseX::Getopt::Parser',
+    metaclass => 'NoGetopt',
+);
 
 sub new_with_options {
     my ($class, @params) = @_;
 
     my $config_from_file;
+
+    my $constructor_params = ( @params == 1 ? $params[0] : {@params} );
+
+    my $getopt_parser;    
+    if (defined $constructor_params->{getopt_parser}) {
+        $getopt_parser = $constructor_params->{getopt_parser};
+        $getopt_parser = $getopt_parser->new if not ref $getopt_parser;        
+    }
+    else {
+        $getopt_parser = maybe::HAVE_MOOSEX_GETOPT_PARSER_DESCRIPTIVE
+            ? MooseX::Getopt::Parser::Descriptive->new
+            : MooseX::Getopt::Parser::Long->new;
+    }
+
     if($class->meta->does_role('MooseX::ConfigFromFile')) {
         local @ARGV = @ARGV;
 
@@ -36,8 +70,6 @@ sub new_with_options {
         }
     }
 
-    my $constructor_params = ( @params == 1 ? $params[0] : {@params} );
-    
     $class->throw_error("Single parameters to new_with_options() must be a HASH ref")
         unless ref($constructor_params) eq 'HASH';
 
@@ -46,6 +78,7 @@ sub new_with_options {
             $class->_attrs_to_options( $config_from_file )
         ],
         params => $constructor_params,
+        getopt_parser => $getopt_parser,
     );
 
     my $params = $config_from_file ? { %$config_from_file, %{$processed{params}} } : $processed{params};
@@ -53,17 +86,18 @@ sub new_with_options {
     $class->new(
         ARGV       => $processed{argv_copy},
         extra_argv => $processed{argv},
+        getopt_parser => $getopt_parser,
         @params, # explicit params to ->new
         %$params, # params from CLI
     );
 }
 
 sub _parse_argv {
-    my ( $class, %params ) = @_;
+    my ($class, %params) = @_;
 
     local @ARGV = @{ $params{argv} || \@ARGV };
 
-    my ( $opt_spec, $name_to_init_arg ) = ( HAVE_GLD ? $class->_gld_spec(%params) : $class->_traditional_spec(%params) );
+    my ( $opt_spec, $name_to_init_arg ) = ( $params{getopt_parser}->_get_getopt_spec(%params) );
 
     # Get a clean copy of the original @ARGV
     my $argv_copy = [ @ARGV ];
@@ -73,13 +107,7 @@ sub _parse_argv {
     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 );
-        }
+        return $params{getopt_parser}->getoptions($opt_spec);
     };
 
     die join "", grep { defined } @err, $@ if @err or $@;
@@ -101,59 +129,6 @@ sub _parse_argv {
     );
 }
 
-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 {