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inc/inc_Module-Build/Module/Build/Base.pm  view on Meta::CPAN

    $ans = scalar(@def) ? $def[0] : '';
  }

  return $ans;
}

sub y_n {
  my $self = shift;
  my ($mess, $def)  = @_;

  die "y_n() called without a prompt message" unless $mess;
  die "Invalid default value: y_n() default must be 'y' or 'n'"
    if $def && $def !~ /^[yn]/i;

  my $answer;
  while (1) { # XXX Infinite or a large number followed by an exception ?
    $answer = $self->prompt(@_);
    return 1 if $answer =~ /^y/i;
    return 0 if $answer =~ /^n/i;
    local $|=1;
    print "Please answer 'y' or 'n'.\n";
  }
}

sub current_action { shift->{action} }
sub invoked_action { shift->{invoked_action} }

sub notes        { shift()->{phash}{notes}->access(@_) }
sub config_data  { shift()->{phash}{config_data}->access(@_) }
sub runtime_params { shift->{phash}{runtime_params}->read( @_ ? shift : () ) }  # Read-only
sub auto_features  { shift()->{phash}{auto_features}->access(@_) }

sub features     {
  my $self = shift;
  my $ph = $self->{phash};

  if (@_) {
    my $key = shift;
    if ($ph->{features}->exists($key)) {
      return $ph->{features}->access($key, @_);
    }

    if (my $info = $ph->{auto_features}->access($key)) {
      my $disabled;
      for my $type ( @{$self->prereq_action_types} ) {
        next if $type eq 'description' || $type eq 'recommends' || ! exists $info->{$type};
        my $prereqs = $info->{$type};
        for my $modname ( sort keys %$prereqs ) {
          my $spec = $prereqs->{$modname};
          my $status = $self->check_installed_status($modname, $spec);
          if ((!$status->{ok}) xor ($type =~ /conflicts$/)) { return 0; }
          if ( ! eval "require $modname; 1" ) { return 0; }
        }
      }
      return 1;
    }

    return $ph->{features}->access($key, @_);
  }

  # No args - get the auto_features & overlay the regular features
  my %features;
  my %auto_features = $ph->{auto_features}->access();
  while (my ($name, $info) = each %auto_features) {
    my $failures = $self->prereq_failures($info);
    my $disabled = grep( /^(?:\w+_)?(?:requires|conflicts)$/,
			 keys %$failures ) ? 1 : 0;
    $features{$name} = $disabled ? 0 : 1;
  }
  %features = (%features, $ph->{features}->access());

  return wantarray ? %features : \%features;
}
BEGIN { *feature = \&features } # Alias

sub _mb_feature {
  my $self = shift;

  if (($self->module_name || '') eq 'Module::Build') {
    # We're building Module::Build itself, so ...::ConfigData isn't
    # valid, but $self->features() should be.
    return $self->feature(@_);
  } else {
    require Module::Build::ConfigData;
    return Module::Build::ConfigData->feature(@_);
  }
}

sub _warn_mb_feature_deps {
  my $self = shift;
  my $name = shift;
  $self->log_warn(
    "The '$name' feature is not available.  Please install missing\n" .
    "feature dependencies and try again.\n".
    $self->_feature_deps_msg($name) . "\n"
  );
}

sub add_build_element {
    my ($self, $elem) = @_;
    my $elems = $self->build_elements;
    push @$elems, $elem unless grep { $_ eq $elem } @$elems;
}

sub ACTION_config_data {
  my $self = shift;
  return unless $self->has_config_data;

  my $module_name = $self->module_name
    or die "The config_data feature requires that 'module_name' be set";
  my $notes_name = $module_name . '::ConfigData'; # TODO: Customize name ???
  my $notes_pm = File::Spec->catfile($self->blib, 'lib', split /::/, "$notes_name.pm");

  return if $self->up_to_date(['Build.PL',
			       $self->config_file('config_data'),
			       $self->config_file('features')
			      ], $notes_pm);

  $self->log_verbose("Writing config notes to $notes_pm\n");
  File::Path::mkpath(File::Basename::dirname($notes_pm));