#!/usr/pkg/bin/perl
package Perl::PrereqScanner::App 1.100;
# ABSTRACT: scan your working dir for likely prereqs

use strict;
use warnings;

use File::Find;
use File::Spec::Functions qw{ catdir updir };
use FindBin qw{ $Bin };
use lib catdir( $Bin, updir, 'lib' );

use List::Util qw{ max };
use Perl::PrereqScanner;
use CPAN::Meta::Requirements ();

use Getopt::Long qw{ GetOptions };
my %options;
GetOptions(
  \%options,
  'combine!',
);
my $combined = $options{combine} && CPAN::Meta::Requirements->new;

foreach my $file ( @ARGV ? @ARGV : '.' ) {
    -d $file ? scan_dir( $file ) : scan_file( $file );
}

sub scan_dir {
    find( {
        no_chdir => 1, 
        wanted => sub { scan_file($_) if /\.(pl|pm|psgi|t)$/ && -f $_; }
    }, shift );
}

sub scan_file {
    my $file = shift;
    my $prereqs = Perl::PrereqScanner->new->scan_file($file);
    if( $options{combine} ){
        $combined->add_requirements($prereqs);
    }
    else {
        print "* $file\n";
        print_prereqs($prereqs);
    }
}

if( $options{combine} ){
    print_prereqs($combined);
}

sub print_prereqs {
    my $prereqs = shift->as_string_hash;
    my $max = max map { length } keys %$prereqs;
    printf( "%-${max}s = %s\n", $_, $prereqs->{$_} )
        for sort keys %$prereqs;
}

exit;

#pod =head1 SYNOPSIS
#pod
#pod     scan_prereqs [--combine] [DIRS|FILES]
#pod
#pod Directories are traversed with L<File::Find> to collect all C<.pl>, C<.pm>,
#pod C<.psgi> and C<.t> files. If no directories or files are specified, the current
#pod working directory is scanned.
#pod
#pod =cut

__END__

=pod

=encoding UTF-8

=head1 NAME

Perl::PrereqScanner::App - scan your working dir for likely prereqs

=head1 VERSION

version 1.100

=head1 SYNOPSIS

    scan_prereqs [--combine] [DIRS|FILES]

Directories are traversed with L<File::Find> to collect all C<.pl>, C<.pm>,
C<.psgi> and C<.t> files. If no directories or files are specified, the current
working directory is scanned.

=head1 PERL VERSION

This library should run on perls released even a long time ago.  It should work
on any version of perl released in the last five years.

Although it may work on older versions of perl, no guarantee is made that the
minimum required version will not be increased.  The version may be increased
for any reason, and there is no promise that patches will be accepted to lower
the minimum required perl.

=head1 AUTHORS

=over 4

=item *

Jerome Quelin

=item *

Ricardo Signes <cpan@semiotic.systems>

=back

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2009 by Jerome Quelin.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut
