DBIx::Class::Schema::Loader::Optional::Dependencies - Optional module dependency specifications (for module authors)
Somewhere in your build-file (e.g. Module::Install's Makefile.PL):
... configure_requires 'DBIx::Class::Schema::Loader' => '0.07006'; require DBIx::Class::Schema::Loader::Optional::Dependencies; my $use_moose_deps = DBIx::Class::Schema::Loader::Optional::Dependencies->req_list_for ('use_moose'); for (keys %$use_moose_deps) { requires $_ => $use_moose_deps->{$_}; } ...
Note that there are some caveats regarding configure_requires(), more info can be found at "configure_requires" in Module::Install
configure_requires()
Some of the features of DBIx::Class::Schema::Loader have external module dependencies on their own. In order not to burden the average user with modules he will never use, these optional dependencies are not included in the base Makefile.PL. Instead an exception with a descriptive message is thrown when a specific feature is missing one or several modules required for its operation. This module is the central holding place for the current list of such dependencies.
Dependencies are organized in groups and each group can list one or more required modules, with an optional minimum version (or 0 for any version).
groups
Modules required for the use_moose option
Moose >= 1.12
MooseX::NonMoose >= 0.15
namespace::autoclean >= 0.09
Requirement group: use_moose
This method should be used by DBIx::Class packagers, to get a hashref of all dependencies keyed by dependency group. Each key (group name) can be supplied to one of the group-specific methods below.
This method should be used by DBIx::Class extension authors, to determine the version of modules a specific feature requires in the current version of DBIx::Class::Schema::Loader. See the "SYNOPSIS" for a real-world example.
Returns true or false depending on whether all modules required by $group_name are present on the system and loadable
$group_name
Returns a single line string suitable for inclusion in larger error messages. This method would normally be used by DBIx::Class::Schema::Loader maintainers, to indicate to the user that he needs to install specific modules before he will be able to use a specific feature.
For example if some of the requirements for use_moose are not available, the returned string could look like:
use_moose
Moose >= 0 (see use_moose for details)
The author is expected to prepend the necessary text to this message before returning the actual error seen by the user.
Returns a hashref containing the actual errors that occured while attempting to load each module in the requirement group.
See "CONTRIBUTORS" in DBIx::Class.
You may distribute this code under the same terms as Perl itself
To install DBIx::Class::Schema::Loader, copy and paste the appropriate command in to your terminal.
cpanm
cpanm DBIx::Class::Schema::Loader
CPAN shell
perl -MCPAN -e shell install DBIx::Class::Schema::Loader
For more information on module installation, please visit the detailed CPAN module installation guide.