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lib/Alien/Build/Plugin/Extract/ArchiveTar.pm  view on Meta::CPAN

  return 1 if $ext =~ /^(tar|tar\.gz|tar\.bz2|tar\.xz|tbz|taz|txz)$/;

  return 0;
}


sub available
{
  my(undef, $ext) = @_;

  if($ext eq 'tar.gz')
  {
    return !! eval { require Archive::Tar; Archive::Tar->has_zlib_support };
  }
  elsif($ext eq 'tar.bz2')
  {
    return !! eval { require Archive::Tar; Archive::Tar->has_bzip2_support && __PACKAGE__->_can_bz2 };
  }
  elsif($ext eq 'tar.xz')
  {
    return !! eval { require Archive::Tar; Archive::Tar->has_xz_support };
  }
  else
  {
    return $ext eq 'tar';
  }
}

sub init
{
  my($self, $meta) = @_;

  $meta->add_requires('share' => 'Archive::Tar' => 0);
  if($self->format eq 'tar.gz' || $self->format eq 'tgz')
  {
    $meta->add_requires('share' => 'IO::Zlib' => 0);
  }
  elsif($self->format eq 'tar.bz2' || $self->format eq 'tbz')
  {
    $meta->add_requires('share' => 'IO::Uncompress::Bunzip2' => 0);
    $meta->add_requires('share' => 'IO::Compress::Bzip2' => 0);
  }
  elsif($self->format eq 'tar.xz' || $self->format eq 'txz')
  {
    $meta->add_requires('share' => 'Archive::Tar' => 2.34);
    $meta->add_requires('share' => 'IO::Uncompress::UnXz' => 0);
  }

  $meta->register_hook(
    extract => sub {
      my($build, $src) = @_;
      my $tar = Archive::Tar->new;
      $tar->read($src);
      $tar->extract;
    }
  );
}

sub _can_bz2
{
  # even when Archive::Tar reports that it supports bz2, I can sometimes get this error:
  # 'Cannot read enough bytes from the tar file', so lets just probe for actual support!
  my $dir = Path::Tiny->new(File::Temp::tempdir( CLEANUP => 1 ));
  eval {
    local $CWD = $dir;
    my $tarball = unpack "u", q{M0EIH.3%!62936=+(]$0``$A[D-$0`8!``7^``!!AI)Y`!```""``=!JGIH-(MT#0]0/2!**---&F@;4#0&:D;X?(6@JH(2<%'N$%3VHC-9E>S/N@"6&I*1@GNJNHCC2>$I5(<0BKR.=XBZ""HVZ;T,CV\LJ!K&*?9`#\7<D4X4)#2R/1$`};
    Path::Tiny->new('xx.tar.bz2')->spew_raw($tarball);
    require Archive::Tar;
    my $tar = Archive::Tar->new;
    $tar->read('xx.tar.bz2');
    $tar->extract;
    my $content = Path::Tiny->new('xx.txt')->slurp;
    die unless $content && $content eq "xx\n";
  };
  my $error = $@;
  $dir->remove_tree;
  !$error;
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

Alien::Build::Plugin::Extract::ArchiveTar - Plugin to extract a tarball using Archive::Tar

=head1 VERSION

version 2.84

=head1 SYNOPSIS

 use alienfile;
 plugin 'Extract::ArchiveTar' => (
   format => 'tar.gz',
 );

=head1 DESCRIPTION

Note: in most case you will want to use L<Alien::Build::Plugin::Extract::Negotiate>
instead.  It picks the appropriate Extract plugin based on your platform and environment.
In some cases you may need to use this plugin directly instead.

This plugin extracts from an archive in tarball format (optionally compressed by either
gzip or bzip2) using L<Archive::Tar>.

=head1 PROPERTIES

=head2 format

Gives a hint as to the expected format.  This helps make sure the prerequisites are set
correctly, since compressed archives require extra Perl modules to be installed.

=head1 METHODS

=head2 handles

 Alien::Build::Plugin::Extract::ArchiveTar->handles($ext);
 $plugin->handles($ext);

Returns true if the plugin is able to handle the archive of the
given format.

=head2 available

 Alien::Build::Plugin::Extract::ArchiveTar->available($ext);

Returns true if the plugin has what it needs right now to extract from the given format

=head1 SEE ALSO

L<Alien::Build::Plugin::Extract::Negotiate>, L<Alien::Build>, L<alienfile>, L<Alien::Build::MM>, L<Alien>