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package Test::Alien::Diag;

use strict;
use warnings;
use 5.008004;
use Test2::API qw( context );
use Exporter qw( import );

our @EXPORT = qw( alien_diag );
our @EXPORT_OK = @EXPORT;

# ABSTRACT: Print out standard diagnostic for Aliens in the test step.
our $VERSION = '2.84'; # VERSION

my @default_scalar_properties = qw(
  cflags cflags_static libs libs_static version install_type
);

my @default_list_properties = qw(
  dynamic_libs bin_dir
);

sub alien_diag ($@)
{
  my $ctx = context();

my %options = defined $_[-1] && ref($_[-1]) eq 'HASH' ?  %{ pop @_ } : ();

my @extra_properties      = @{ delete $options{properties}      || [] };
  my @extra_list_properties = @{ delete $options{list_properties} || [] };

my $max = 0;
  foreach my $alien (@_)
  {
    foreach my $name (@default_scalar_properties, @default_list_properties, @extra_properties, @extra_list_properties)
    {
      if(eval { $alien->can($name) })
      {
        my $str = "$alien->$name";
        if(length($str) > $max)
        {
          $max = length($str);
        }
      }
    }
  }

$ctx->diag('');

if(%options)
  {
    my @extra = sort keys %options;
    $ctx->diag("warning: unknown option@{[ @extra > 1 ? 's' : '' ]} for alien_diag: @extra");
    $ctx->diag("(you should check for typos or maybe upgrade to a newer version of Alien::Build)");
  }

foreach my $alien (@_) {
    $ctx->diag('') for 1..2;

my $found = 0;

foreach my $name (sort(@default_scalar_properties, @extra_properties))
    {
      if(eval { $alien->can($name) })
      {
        $found++;
        my $value = $alien->$name;
        $value = '[undef]' unless defined $value;
        $ctx->diag(sprintf "%-${max}s = %s", "$alien->$name", $value);
      }
    }

foreach my $name (sort(@default_list_properties, @extra_list_properties))
    {
      if(eval { $alien->can($name) })
      {
        $found++;
        my @list = eval { $alien->$name };
        next if $@;
        $ctx->diag(sprintf "%-${max}s = %s", "$alien->$name", $_) for @list;
      }
    }

$ctx->diag("no diagnostics found for $alien") unless $found;
  }

$ctx->diag('') for 1..2;

$ctx->release;
}

__END__

=pod

=encoding UTF-8

=head1 NAME

Test::Alien::Diag - Print out standard diagnostic for Aliens in the test step.

=head1 VERSION

version 2.84

=head1 SYNOPSIS

use Test2::V0;
 use Test::Alien::Diag qw( alien_diag );

=head1 DESCRIPTION

This module provides an C<alien_diag> method that prints out diagnostics useful for
cpantesters and other bug reports that gives a quick summary of the important settings
like C<clfags> and C<libs>.

=head1 FUNCTIONS

=head2 alien_diag

alien_diag @aliens;

prints out diagnostics for each given alien.  Each alien must be the class
name of an alien.

[version 2.68]

alien_diag @aliens, \%options;

Starting with L<Alien::Build> 2.68, you can provide an option hash to adjust the
behavior of C<alien_diag>.  Valid options are:

=over 4

=item properties

Additional properties to display in the diagnostic.  Useful when you have an L<Alien>
with custom properties defined in the subclass.

=item list_properties

Additional properties that are returned as a list to display in the diagnostic.  Useful
when you have an L<Alien> with customer properties that return a list.

=back

=head1 AUTHOR

Author: Graham Ollis E<lt>plicease@cpan.orgE<gt>

Contributors:

Diab Jerius (DJERIUS)

Roy Storey (KIWIROY)

Ilya Pavlov

David Mertens (run4flat)

Mark Nunberg (mordy, mnunberg)

Christian Walde (Mithaldu)

Brian Wightman (MidLifeXis)

Zaki Mughal (zmughal)

mohawk (mohawk2, ETJ)

Vikas N Kumar (vikasnkumar)

Flavio Poletti (polettix)

Salvador Fandiño (salva)

Gianni Ceccarelli (dakkar)

Pavel Shaydo (zwon, trinitum)

Kang-min Liu (劉康民, gugod)

Nicholas Shipp (nshp)

Juan Julián Merelo Guervós (JJ)

Joel Berger (JBERGER)

Petr Písař (ppisar)

Lance Wicks (LANCEW)

Ahmad Fatoum (a3f, ATHREEF)

José Joaquín Atria (JJATRIA)

Duke Leto (LETO)

Shoichi Kaji (SKAJI)

Shawn Laffan (SLAFFAN)

Paul Evans (leonerd, PEVANS)

Håkon Hægland (hakonhagland, HAKONH)

nick nauwelaerts (INPHOBIA)

Florian Weimer

=head1 COPYRIGHT AND LICENSE

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

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