/usr/local/CPAN/Graph-Usage/Makefile.PL

• package main
  • MY::metafile
• package MY
• package main
• EOF

use 5.006001;
use ExtUtils::MakeMaker;
use strict;

sub MY::metafile {
  package MY;
  my $self = shift;
  if (!eval { require YAML; 1 })
  {
    warn ("YAML not installed, 'make dist' will not override 'META.yml'.");
    return $self->SUPER::metafile_target(@_);
  };

  require YAML::Node;
  my $node = YAML::Node->new({});

  $node->{name}			= $self->{DISTNAME};
  $node->{abstract}		= $self->{ABSTRACT};
  $node->{version}		= $self->{VERSION};
  $node->{version_from}		= $self->{VERSION_FROM};
  $node->{license}		= 'gpl';
  $node->{distribution_type}	= 'module';
  $node->{generated_by}		= "$self->{DISTNAME} version $self->{VERSION}";
  $node->{installdirs}		= 'site';
  $node->{requires}		= $self->{PREREQ_PM};

  my $dump = YAML::Dump( $node );

  $dump =~ s/^(.*)$/\t\$(NOECHO) \$(ECHO) "$1" >>META.yml/gm;
  $dump =~ s/>>META\.yml/>META.yml/;

  return "metafile:\n$dump";
}

# svg is done via dot, too.
eval { require Graph::Easy::As_svg; };

if (!defined $Graph::Easy::As_svg::VERSION)
  {
  print "\n************\nWARNING: ";
  print "You do not seem to have Graph::Easy::As_svg installed.\n";
  print "         SVG output (without dot) is not possible until you install it afterwards.\n\n";
  }

WriteMakefile(
    NAME                => 'Graph::Usage',
    VERSION_FROM        => 'lib/Graph/Usage.pm', # finds $VERSION
    PREREQ_PM           => {
	'Graph::Easy' => 0.40,
        "Scalar::Util" => 1.13,
        "Heap" => 0.71,
        },
    ABSTRACT_FROM       => 'lib/Graph/Usage.pm',
    AUTHOR              => 'Tels <nospam-abuse@bloodgate.com>',
    PREREQ_FATAL        => 1,  # can't work w/o proper prereqs
);