0.10 - support default configfile w/ MX::ConfigFromFile

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

diff --git a/lib/MooseX/Getopt.pm b/lib/MooseX/Getopt.pm
index 7011a55..d7898f7 100644 (file)
--- a/lib/MooseX/Getopt.pm
+++ b/lib/MooseX/Getopt.pm
@@ -2,17 +2,18 @@
 package MooseX::Getopt;
 use Moose::Role;
 
-use Getopt::Long::Descriptive ();
-
 use MooseX::Getopt::OptionTypeMap;
 use MooseX::Getopt::Meta::Attribute;
 use MooseX::Getopt::Meta::Attribute::NoGetopt;
 
-our $VERSION   = '0.08';
+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');
-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) = @_;
@@ -25,12 +26,23 @@ sub new_with_options {
 
     my $params = $processed{params};
 
-    if($class->meta->does_role('MooseX::ConfigFromFile')
-       && defined $params->{configfile}) {
-        %$params = (
-            %{$class->get_config_from_file($params->{configfile})},
-            %$params,
-        );
+    if($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(
@@ -46,20 +58,7 @@ sub _parse_argv {
 
     local @ARGV = @{ $params{argv} || \@ARGV };
 
-    my ( @options, %name_to_init_arg );
-
-    foreach my $opt ( @{ $params{options} } ) {
-        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};
-    }
+    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 ];
@@ -68,7 +67,14 @@ sub _parse_argv {
 
     my ( $parsed_options, $usage ) = eval {
         local $SIG{__WARN__} = sub { push @err, @_ };
-        Getopt::Long::Descriptive::describe_options("usage: %c %o", @options)
+
+        if ( HAVE_GLD ) {
+            return Getopt::Long::Descriptive::describe_options($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 $@;
@@ -76,17 +82,58 @@ sub _parse_argv {
     # 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,
-        params    => {
-            map { 
-                $name_to_init_arg{$_} => $parsed_options->{$_} 
-            } keys %$parsed_options,   
-        }
+        ( defined($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 {
@@ -205,7 +252,12 @@ 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 for you.
+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
 
@@ -326,6 +378,9 @@ and then return a newly constructed object.
 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>.
+
 =item B<ARGV>
 
 This accessor contains a reference to a copy of the C<@ARGV> array