File Coverage

blib/lib/Alien/Build/Plugin/PkgConfig/CommandLine.pm

Criterion	Covered	Total	%
statement	47	90	52.2
branch	18	36	50.0
condition	0	8	0.0
subroutine	8	17	47.0
pod	2	2	100.0
total	75	153	49.0

package Alien::Build::Plugin::PkgConfig::CommandLine;

use strict;
use warnings;
use 5.008004;
use Alien::Build::Plugin;
use Carp ();

# ABSTRACT: Probe system and determine library or tool properties using the pkg-config command line interface
our $VERSION = '2.45'; # VERSION


has '+pkg_name' => sub {
  Carp::croak "pkg_name is a required property";
};

# NOT used, for compat with other PkgConfig plugins
has register_prereqs => 1;

sub _bin_name {

  # We prefer pkgconf to pkg-config because it seems to be the future.

  require File::Which;
  File::Which::which($ENV{PKG_CONFIG})
    ? $ENV{PKG_CONFIG}
    : File::Which::which('pkgconf')
      ? 'pkgconf'
      : File::Which::which('pkg-config')
        ? 'pkg-config'
        : undef;
};

has bin_name => \&_bin_name;


has atleast_version => undef;


has exact_version => undef;


has max_version => undef;


has minimum_version => undef;

sub _val
{
  my($build, $args, $prop_name) = @_;
  my $string = $args->{out};
  chomp $string;
  $string =~ s{^\s+}{};
  if($prop_name =~ /version$/)
  { $string =~ s{\s*$}{} }
  else
  { $string =~ s{\s*$}{ } }
  if($prop_name =~ /^(.*?)\.(.*?)\.(.*?)$/)
  { $build->runtime_prop->{$1}->{$2}->{$3} = $string }
  else
  { $build->runtime_prop->{$prop_name} = $string }
  ();
}


sub available
{
  !!_bin_name();
}

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

  my @probe;
  my @gather;

  my $pkgconf = $self->bin_name;

  unless(defined $meta->prop->{env}->{PKG_CONFIG})
  {
    $meta->prop->{env}->{PKG_CONFIG} = $pkgconf;
  }

  my($pkg_name, @alt_names) = (ref $self->pkg_name) ? (@{ $self->pkg_name }) : ($self->pkg_name);

  push @probe, map { [$pkgconf, '--exists', $_] } ($pkg_name, @alt_names);

  if(defined $self->minimum_version)
  {
    push @probe, [ $pkgconf, '--atleast-version=' . $self->minimum_version, $pkg_name ];
  }
  elsif(defined $self->atleast_version)
  {
    push @probe, [ $pkgconf, '--atleast-version=' . $self->atleast_version, $pkg_name ];
  }

  if(defined $self->exact_version)
  {
    push @probe, [ $pkgconf, '--exact-version=' . $self->exact_version, $pkg_name ];
  }

  if(defined $self->max_version)
  {
    push @probe, [ $pkgconf, '--max-version=' . $self->max_version, $pkg_name ];
  }

  push @probe, [ $pkgconf, '--modversion', $pkg_name, sub {
    my($build, $args) = @_;
    my $version = $args->{out};
    $version =~ s{^\s+}{};
    $version =~ s{\s*$}{};
    $build->hook_prop->{version} = $version;
  }];

  unshift @probe, sub {
    my($build) = @_;
    $build->runtime_prop->{legacy}->{name} ||= $pkg_name;
    $build->hook_prop->{probe_class} = __PACKAGE__;
    $build->hook_prop->{probe_instance_id} = $self->instance_id;
  };

  $meta->register_hook(
    probe => \@probe
  );

  push @gather, sub {
    my($build) = @_;
    die 'pkg-config command line probe does not match gather' if $build->hook_prop->{name} eq 'gather_system'
    &&                                                        ($build->install_prop->{system_probe_instance_id} || '') ne $self->instance_id;
  };
  push @gather, map { [ $pkgconf, '--exists', $_] } ($pkg_name, @alt_names);

  foreach my $prop_name (qw( cflags libs version ))
  {
    my $flag = $prop_name eq 'version' ? '--modversion' : "--$prop_name";
    push @gather,
      [ $pkgconf, $flag, $pkg_name, sub { _val @_, $prop_name } ];
    if(@alt_names)
    {
      foreach my $alt ($pkg_name, @alt_names)
      {
        push @gather,
          [ $pkgconf, $flag, $alt, sub { _val @_, "alt.$alt.$prop_name" } ];
      }
    }
  }

  foreach my $prop_name (qw( cflags libs ))
  {
    push @gather,
      [ $pkgconf, '--static', "--$prop_name", $pkg_name, sub { _val @_, "${prop_name}_static" } ];
    if(@alt_names)
    {
      foreach my $alt ($pkg_name, @alt_names)
      {
        push @gather,
          [ $pkgconf, '--static', "--$prop_name", $alt, sub { _val @_, "alt.$alt.${prop_name}_static" } ];
      }
    }
  }

  $meta->register_hook(gather_system => [@gather]);

  if($meta->prop->{platform}->{system_type} eq 'windows-mingw')
  {
    @gather = map {
      if(ref $_ eq 'ARRAY') {
        my($pkgconf, @rest) = @$_;
        [$pkgconf, '--dont-define-prefix', @rest],
      } else {
        $_
      }
    } @gather;
  }

  $meta->register_hook(gather_share => [@gather]);

  $meta->after_hook(
    $_ => sub {
      my($build) = @_;
      if(keys %{ $build->runtime_prop->{alt} } < 2)
      {
        delete $build->runtime_prop->{alt};
      }
    },
  ) for qw( gather_system gather_share );

  $self;
}

1;

__END__