App::Info::Lib::OSSPUUID - Information about the OSSP UUID library

  use App::Info::Lib::OSSPUUID;

  my $uuid = App::Info::Lib::OSSPUUID->new;

  if ($uuid->installed) {
      print "App name: ", $uuid->name, "\n";
      print "Version:  ", $uuid->version, "\n";
      print "Bin dir:  ", $uuid->bin_dir, "\n";
  } else {
      print "Expat is not installed. :-(\n";
  }

  my $expat = App::Info::Lib::OSSPUUID->new(@params);

  my $key_name = App::Info::Lib::OSSPUUID->key_name;

  print "UUID is ", ($uuid->installed ? '' : 'not '), "installed.\n";

  my $name = $uuid->name;

  my $version = $uuid->version;

  my $major_version = $uuid->major_version;

  my $minor_version = $uuid->minor_version;

  my $patch_version = $uuid->patch_version;

  my $exe = $uuid->executable;

  my $bin_dir = $uuid->bin_dir;

  my $inc_dir = $uuid->inc_dir;

  my $lib_dir = $uuid->lib_dir;

  my $so_lib_dir = $uuid->so_lib_dir;

  my $configure = $uuid->cflags;

  my $configure = $uuid->ldflags;

  my $bool = $uuid->perl_module;

  my $home_url = $uuid->home_url;

  my $download_url = $uuid->download_url;

  my @search_exe_names = $app->search_exe_names;

  my @search_bin_dirs = $app->search_bin_dirs;

package App::Info::Lib::OSSPUUID;

use strict;
use App::Info::Util;
use App::Info::Lib;
use File::Spec::Functions 'catfile';
use vars qw(@ISA $VERSION);
@ISA = qw(App::Info::Lib);
$VERSION = '0.57';
use constant WIN32 => $^O eq 'MSWin32';

my $u = App::Info::Util->new;

##############################################################################

sub new {
    # Construct the object.
    my $self = shift->SUPER::new(@_);

    # Find uuid-config.
    $self->info("Looking for uuid-config");

    my @paths = $self->search_bin_dirs;
    my @exes  = $self->search_exe_names;

    if (my $cfg = $u->first_cat_exe(\@exes, @paths)) {
        # We found it. Confirm.
        $self->{uuid_config} = $self->confirm(
            key      => 'path to uuid-config',
            prompt   => "Path to uuid-config?",
            value    => $cfg,
            callback => sub { -x },
            error    => 'Not an executable'
        );
    } else {
        # Handle an unknown value.
        $self->{uuid_config} = $self->unknown(
            key      => 'path to uuid-config',
            prompt   => "Path to uuid-config?",
            callback => sub { -x },
            error    => 'Not an executable'
        );
    }

    # Set up search defaults.
    if (exists $self->{search_uuid_names}) {
        $self->{search_uuid_names} = [$self->{search_uuid_names}]
            unless ref $self->{search_uuid_names} eq 'ARRAY';
    } else {
        $self->{search_uuid_names} = [];
    }

    return $self;
}

# We'll use this code reference as a common way of collecting data.
my $get_data = sub {
    return unless $_[0]->{uuid_config};
    $_[0]->info(qq{Executing `"$_[0]->{uuid_config}" $_[1]`});
    my $info = `"$_[0]->{uuid_config}" $_[1]`;
    chomp $info;
    return $info;
};


##############################################################################

sub key_name { 'OSSP UUID' }

##############################################################################

sub installed { $_[0]->{uuid_config} ? 1 : undef }

##############################################################################

my $get_version = sub {
    my $self = shift;
    $self->{'--version'} = 1;
    my $data = $get_data->($self, '--version');
    unless ($data) {
        $self->error("Failed to find OSSP UUID version with ".
                     "`$self->{uuid_config} --version`");
            return;
    }

    # Parse the verison out of the data.
    chomp $data;
    my ($name, $version, $date) = $data =~ /(\D+)\s+([\d.]+)\s+\(([^)]+)\)/;

    # Check for and assign the name.
    $name
        ? $self->{name} = $name
        : $self->error("Unable to parse name from string '$data'");

    # Parse the version number.
    if ($version) {
        my ($x, $y, $z) = $version =~ /(\d+)\.(\d+).(\d+)/;
        if (defined $x and defined $y and defined $z) {
            # Beta/devel/release candidates are treated as patch level "0"
            @{$self}{qw(version major minor patch)} =
              ($version, $x, $y, $z);
        } elsif ($version =~ /(\d+)\.(\d+)/) {
            # New versions, such as "7.4", are treated as patch level "0"
            @{$self}{qw(version major minor patch)} =
              ($version, $1, $2, 0);
        } else {
            $self->error("Failed to parse OSSP UUID version parts from " .
                         "string '$version'");
        }
    } else {
        $self->error("Unable to parse version from string '$data'");
    }
};

sub name {
    my $self = shift;
    return unless $self->{uuid_config};

    # Load data.
    $get_version->($self) unless $self->{'--version'};

    # Handle an unknown name.
    $self->{name} ||= $self->unknown( key => 'OSSP UUID name' );

    # Return the name.
    return $self->{name};
}

##############################################################################

sub version {
    my $self = shift;
    return unless $self->{uuid_config};

    # Load data.
    $get_version->($self) unless $self->{'--version'};

    # Handle an unknown value.
    unless ($self->{version}) {
        # Create a validation code reference.
        my $chk_version = sub {
            # Try to get the version number parts.
            my ($x, $y, $z) = /^(\d+)\.(\d+).(\d+)$/;
            # Return false if we didn't get all three.
            return unless $x and defined $y and defined $z;
            # Save all three parts.
            @{$self}{qw(major minor patch)} = ($x, $y, $z);
            # Return true.
            return 1;
        };
        $self->{version} = $self->unknown(
            key     => 'OSSP UUID version number',
            callback => $chk_version
        );
    }

    return $self->{version};
}

##############################################################################

# This code reference is used by major_version(), minor_version(), and
# patch_version() to validate a version number entered by a user.
my $is_int = sub { /^\d+$/ };

sub major_version {
    my $self = shift;
    return unless $self->{uuid_config};
    # Load data.
    $get_version->($self) unless exists $self->{'--version'};
    # Handle an unknown value.
    $self->{major} = $self->unknown(
        key      => 'OSSP UUID major version number',
        callback => $is_int
    ) unless $self->{major};
    return $self->{major};
}

##############################################################################

sub minor_version {
    my $self = shift;
    return unless $self->{uuid_config};
    # Load data.
    $get_version->($self) unless exists $self->{'--version'};
    # Handle an unknown value.
    $self->{minor} = $self->unknown(
        key      => 'OSSP UUID minor version number',
        callback => $is_int
    ) unless defined $self->{minor};
    return $self->{minor};
}

##############################################################################

sub patch_version {
    my $self = shift;
    return unless $self->{uuid_config};
    # Load data.
    $get_version->($self) unless exists $self->{'--version'};
    # Handle an unknown value.
    $self->{patch} = $self->unknown(
        key      => 'OSSP UUID patch version number',
        callback => $is_int
    ) unless defined $self->{patch};
    return $self->{patch};
}

##############################################################################

sub executable {
    my $self = shift;
    my $key  = 'uuid';

    # Find executable.
    $self->info("Looking for $key");

    unless ($self->{$key}) {
        my $bin = $self->bin_dir or return;
        if (my $exe = $u->first_cat_exe([$self->search_uuid_names], $bin)) {
            # We found it. Confirm.
            $self->{$key} = $self->confirm(
                key      => "path to $key",
                prompt   => "Path to $key executable?",
                value    => $exe,
                callback => sub { -x },
                error    => 'Not an executable'
            );
        } else {
            # Handle an unknown value.
            $self->{$key} = $self->unknown(
                key      => "path to $key",
                prompt   => "Path to $key executable?",
                callback => sub { -x },
                error    => 'Not an executable'
            );
        }
    }

    return $self->{$key};
};

*uuid = \&executable;

##############################################################################

# This code reference is used by bin_dir(), lib_dir(), and so_lib_dir() to
# validate a directory entered by the user.
my $is_dir = sub { -d };

sub bin_dir {
    my $self = shift;
    return unless $self->{uuid_config};
    unless (exists $self->{bin_dir} ) {
        if (my $dir = $get_data->($self, '--bindir')) {
            $self->{bin_dir} = $dir;
        } else {
            # Handle an unknown value.
            $self->error("Cannot find bin directory");
            $self->{bin_dir} = $self->unknown(
                key      => 'OSSP UUID bin dir',
                callback => $is_dir
            );
        }
    }

    return $self->{bin_dir};
}

##############################################################################

sub inc_dir {
    my $self = shift;
    return unless $self->{uuid_config};
    unless (exists $self->{inc_dir} ) {
        if (my $dir = $get_data->($self, '--includedir')) {
            $self->{inc_dir} = $dir;
        } else {
            # Handle an unknown value.
            $self->error("Cannot find include directory");
            $self->{inc_dir} = $self->unknown(
                key      => 'OSSP UUID include dir',
                callback => $is_dir
            );
        }
    }

    return $self->{inc_dir};
}

##############################################################################

sub lib_dir {
    my $self = shift;
    return unless $self->{uuid_config};
    unless (exists $self->{lib_dir} ) {
        if (my $dir = $get_data->($self, '--libdir')) {
            $self->{lib_dir} = $dir;
        } else {
            # Handle an unknown value.
            $self->error("Cannot find library directory");
            $self->{lib_dir} = $self->unknown(
                key      => 'OSSP UUID library dir',
                callback => $is_dir
            );
        }
    }

    return $self->{lib_dir};
}

##############################################################################

*so_lib_dir = \&lib_dir;

##############################################################################

sub cflags {
    my $self = shift;
    return unless $self->{uuid_config};
    unless (exists $self->{cflags} ) {
        if (my $conf = $get_data->($self, '--cflags')) {
            $self->{cflags} = $conf;
        } else {
            # Cflags can be empty, so just make sure it exists and is
            # defined. Don't prompt.
            $self->{cflags} = '';
        }
    }

    return $self->{cflags};
}

##############################################################################

sub ldflags {
    my $self = shift;
    return unless $self->{uuid_config};
    unless (exists $self->{ldflags} ) {
        if (my $conf = $get_data->($self, '--ldflags')) {
            $self->{ldflags} = $conf;
        } else {
            # Ldflags can be empty, so just make sure it exists and is
            # defined. Don't prompt.
            $self->{ldflags} = '';
        }
    }

    return $self->{ldflags};
}

##############################################################################

sub perl_module {
    my $self = shift;
    $self->info('Loading OSSP::uuuid');
    $self->{perl_module} ||= do {
        eval 'use OSSP::uuid';
        $INC{catfile qw(OSSP uuid.pm)};
    };
    return $self->{perl_module};
}

##############################################################################

sub home_url { 'http://www.ossp.org/pkg/lib/uuid/' }

##############################################################################

sub download_url { 'http://www.ossp.org/pkg/lib/uuid/' }

##############################################################################

sub search_exe_names {
    my $self = shift;
    my $exe = 'uuid-config';
    $exe .= '.exe' if WIN32;
    return ($self->SUPER::search_exe_names, $exe);
}

##############################################################################

sub search_bin_dirs {
    return shift->SUPER::search_bin_dirs,
      $u->path,
      qw(/usr/local/bin
         /usr/local/sbin
         /usr/bin
         /usr/sbin
         /bin),
      'C:\Program Files\uid\bin';
}

##############################################################################

sub search_uuid_names { @{ shift->{search_uuid_names} } }

1;
__END__