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  =  $ENV{PERL_CPAN_REPORTER_DIR}
  || $ENV{PERL_CPAN_REPORTER_CONFIG}
  || $ENV{AUTOMATED_TESTING}
  || $ENV{TRAVIS}
  || $ENV{APPVEYOR}
  || $ENV{CI};


use Cwd;
my $base_dir = getcwd();

use Env qw( @PATH @PKG_CONFIG_PATH );

use Alien::sqlite;
unshift @PATH, Alien::sqlite->bin_dir;
my @dep_aliens = ('Alien::sqlite');
my %have;
my $lib = 'Alien::curl';
$have{$lib} = eval "require $lib";
if ($have{$lib}) {
    unshift @PATH, $lib->dist_dir . '/dynamic';
}
$lib = 'Alien::libtiff';
$have{$lib} = eval "require $lib";
if ($have{$lib}) {
    #say 'Adding libtiff dependency';
    unshift @PATH, $lib->bin_dir;
    push @dep_aliens, $lib if $lib->install_type eq 'share';
    my $p;
    if ($on_windows && $lib->install_type eq 'system') {
      #  dirty hack for strawberry perl
      $p = path ($^X)->parent->parent->parent . '/c/lib/pkgconfig';
    }
    elsif ($lib->install_type eq 'share') {
      $p = path ($lib->dist_dir, 'lib', 'pkgconfig');
    }
    if ($p && -e $p) {
      push @PKG_CONFIG_PATH, $p;
      say join ' ', @PKG_CONFIG_PATH;
    }
}

say "Alien::sqlite has sqlite version " . Alien::sqlite->version;

my $min_target_version = '7.1';

plugin 'PkgConfig' => (
    pkg_name => 'proj',
    minimum_version => $min_target_version,
);
if ($on_windows) {
  #  possible GIS Internals distribution
  if (my $path = `where geos_c.dll`) {
    Alien::Build->log ('Found possible GIS Internals build');
    $path = Path::Tiny::path ($path)->parent;
    #  could be several variants
    my @proj_dlls
      = map {$_->[0]}
        sort { versioncmp($a->[-1], $b->[-1]) }
        map  { $_ =~ /(\d+)_(\d+)/; [$_, "$1.$2"] }
        glob ("$path/proj*.dll");
    $proj_dlls[-1] =~ /(\d+)_(\d+)/;
    my $version = "$1.$2";
    if (versioncmp ($version, $min_target_version) > 0) {
      $path = Path::Tiny::path($proj_dlls[-1])->parent->stringify;
      $path =~ s|\\|/|g;  #  path separators
      Alien::Build->log ("Probe::CBuilder checking $path");
      plugin 'Probe::CBuilder' => (
        cflags => "-I$path/include",
        libs   => "-L$path/lib -lproj",
      );
    }
  }
}


share {

  #  see if this helps with cirrus bsd builds
  #$ENV{SQLITE3_CFLAGS} = Alien::sqlite->cflags;
  #$ENV{SQLITE3_LIBS} = Alien::sqlite->libs;
  #say "sqlite cflags: " . Alien::sqlite->cflags;
  #say "sqlite libs: " . Alien::sqlite->libs;
  #if ($have{'Alien::libtiff'}) {
  #  my $p = path ('Alien::libtiff'->dist_dir, 'lib');
  #  $ENV{TIFF_LIBS}
  #    ||= (-e $p
  #          ? "-L$p "
  #          : ''
  #        )
  #        . 'Alien::libtiff'->libs;
  #  say "libtiff libs: $ENV{TIFF_LIBS}";
  #}

  plugin 'Build::SearchDep' => (
    aliens   => [ grep {$_->install_type eq 'share'} @dep_aliens ],
    public_I => 1,
    public_l => 1,
  );


  if ($on_windows) {
    #  there are issues with strawberry perl's gcc
    plugin 'Prefer::BadVersion' => '7.1.0';
  }
  
  start_url 'https://download.osgeo.org/proj/';
  #start_url "file://$base_dir";  #  debug
  plugin Download => (
    filter  => qr/^proj-([0-9\.]+)\.tar\.gz$/,
    version => qr/^proj-([0-9\.]+)\.tar\.gz$/,
  );

  my $proj_version = get_proj_version() // 'not yet defined';
  say "Downloaded proj version is $proj_version";
  
  die "Downloaded proj version $proj_version is too low "
      . "(should be >= $min_target_version).\n"
      . "Please update your Alien::Build::Fetch::Cache if using one."
    if   defined $proj_version
      && versioncmp ($proj_version, $min_target_version) < 0;