From: Yuval Kogman <nothingmuch@woobling.org>
Date: Mon, 21 Jan 2008 16:05:29 +0000 (+0000)
Subject: Getopt::Long::Descriptive
X-Git-Tag: 0_09~1^2~8
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMooseX-Getopt.git;a=commitdiff_plain;h=6bb4cb66b12d95e6e9bb764eed6fb10cb55383ea

Getopt::Long::Descriptive
---

diff --git a/lib/MooseX/Getopt.pm b/lib/MooseX/Getopt.pm
index 3dfd632..7011a55 100644
--- a/lib/MooseX/Getopt.pm
+++ b/lib/MooseX/Getopt.pm
@@ -2,7 +2,7 @@
 package MooseX::Getopt;
 use Moose::Role;
 
-use Getopt::Long ();
+use Getopt::Long::Descriptive ();
 
 use MooseX::Getopt::OptionTypeMap;
 use MooseX::Getopt::Meta::Attribute;
@@ -46,20 +46,32 @@ sub _parse_argv {
 
     local @ARGV = @{ $params{argv} || \@ARGV };
 
-    my ( @options, %name_to_init_arg, %options );
+    my ( @options, %name_to_init_arg );
 
     foreach my $opt ( @{ $params{options} } ) {
-        push @options, $opt->{opt_string};
+        push @options, [
+            $opt->{opt_string},
+            $opt->{doc} || ' ',
+            {
+                ( $opt->{required} ? (required => $opt->{required}) : () ),
+                ( exists $opt->{default}  ? (default  => $opt->{default})  : () ),
+            },
+        ];
+
         $name_to_init_arg{ $opt->{name} } = $opt->{init_arg};
     }
 
     # Get a clean copy of the original @ARGV
     my $argv_copy = [ @ARGV ];
 
-    {
-        local $SIG{__WARN__} = sub { die $_[0] };
-        Getopt::Long::GetOptions(\%options, @options);
-    }
+    my @err;
+
+    my ( $parsed_options, $usage ) = eval {
+        local $SIG{__WARN__} = sub { push @err, @_ };
+        Getopt::Long::Descriptive::describe_options("usage: %c %o", @options)
+    };
+
+    die join "", grep { defined } @err, $@ if @err or $@;
 
     # Get a copy of the Getopt::Long-mangled @ARGV
     my $argv_mangled = [ @ARGV ];
@@ -69,8 +81,8 @@ sub _parse_argv {
         argv      => $argv_mangled,
         params    => {
             map { 
-                $name_to_init_arg{$_} => $options{$_} 
-            } keys %options,   
+                $name_to_init_arg{$_} => $parsed_options->{$_} 
+            } keys %$parsed_options,   
         }
     );
 }
@@ -107,8 +119,8 @@ sub _attrs_to_options {
 
         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 (MooseX::Getopt::OptionTypeMap->has_option_type($type_name)) {
+                $opt_string .= MooseX::Getopt::OptionTypeMap->get_option_type($type_name)
             }
         }
 
@@ -117,6 +129,7 @@ sub _attrs_to_options {
             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 ) : () ),
         }
     }