Add deprecation warnings when type spec is missing

lib/dry/validation/deprecations.rb

@@ -0,0 +1,23 @@
+require 'logger'
+
+module Dry
+  module Validation
+    module Deprecations
+      extend Dry::Configurable
+
+      setting :logger, Logger.new($stdout)
+
+      def self.format(msg, caller)
+        "#{msg} [#{caller[1].split(':')[0..1].join(' line ')}]"
+      end
+
+      def logger
+        @logger ||= Deprecations.config.logger
+      end
+
+      def warn(msg)
+        logger.warn(Deprecations.format(msg, ::Kernel.caller))
+      end
+    end
+  end
+end

lib/dry/validation/error_compiler/input.rb

@@ -1,6 +1,10 @@
+require 'dry/validation/deprecations'
+
 module Dry
   module Validation
     class ErrorCompiler::Input < ErrorCompiler
+      extend Deprecations
+
       attr_reader :name, :input, :rule, :val_type
 
       def initialize(messages, options)
@@ -67,12 +71,12 @@ module Dry
       end
 
       def options_for_inclusion?(args)
-        ::Kernel.warn 'inclusion is deprecated - use included_in instead.'
+        warn 'inclusion is deprecated - use included_in instead.'
         options_for_included_in?(args)
       end
 
       def options_for_exclusion?(args)
-        ::Kernel.warn 'exclusion is deprecated - use excluded_from instead.'
+        warn 'exclusion is deprecated - use excluded_from instead.'
         options_for_excluded_from?(args)
       end
 

lib/dry/validation/schema/dsl.rb

@@ -1,9 +1,12 @@
 require 'dry/validation/schema/rule'
+require 'dry/validation/deprecations'
 
 module Dry
   module Validation
     class Schema
       class DSL < BasicObject
+        include ::Dry::Validation::Deprecations
+
         attr_reader :name, :registry, :rules, :checks, :parent, :options
 
         def self.[](name, options = {})

lib/dry/validation/schema/rule.rb

@@ -1,7 +1,11 @@
+require 'dry/validation/deprecations'
+
 module Dry
   module Validation
     class Schema
       class Rule < BasicObject
+        extend ::Dry::Validation::Deprecations
+
         INVALID_PREDICATES = {
           value: [],
           maybe: [:empty?, :none?],
@@ -48,7 +52,7 @@ module Dry
         end
 
         def required(*predicates)
-          ::Kernel.warn 'required is deprecated - use filled instead.'
+          warn 'required is deprecated - use filled instead.'
 
           filled(*predicates)
         end

lib/dry/validation/schema/value.rb

@@ -15,7 +15,7 @@ module Dry
         end
 
         def key(name, &block)
-          ::Kernel.warn 'key is deprecated - use required instead.'
+          warn 'key is deprecated - use required instead.'
 
           required(name, &block)
         end
@@ -25,6 +25,8 @@ module Dry
 
           if type_spec
             type_map[name] = type_spec
+          else
+            warn "Missing type spec for #{name.inspect} #{type}"
           end
 
           rule

spec/spec_helper.rb

@@ -23,6 +23,10 @@ module Types
   include Dry::Types.module
 end
 
+Dry::Validation::Deprecations.configure do |config|
+  config.logger = Logger.new(SPEC_ROOT.join('../log/deprecations.log'))
+end
+
 RSpec.configure do |config|
   config.disable_monkey_patching!