Add support for repeatable array options

lib/dry/cli/option.rb

@@ -145,8 +145,8 @@ def valid_value?(value)
       def cast(value)
         return value unless cast_callable.respond_to?(:call)
 
-        if type == :array
-          value.map { |el| cast_single(el) }
+        if array?
+          Array(value).map { |el| cast_single(el) }
         else
           cast_single(value)
         end

lib/dry/cli/parser.rb

@@ -17,13 +17,7 @@ def self.call(command, arguments, prog_name)
         original_arguments = arguments.dup
         parsed_options = {}
 
-        OptionParser.new do |opts|
-          command.options.each do |option|
-            opts.on(*option.parser_options) do |value|
-              parsed_options[option.name.to_sym] = option.cast(value)
-            end
-          end
-
+        option_parser(command.options, parsed_options) do |opts|
           opts.on_tail("-h", "--help") do
             return Result.help
           end
@@ -37,6 +31,27 @@ def self.call(command, arguments, prog_name)
         Result.failure(exception.message)
       end
 
+      # @since NEXT
+      # @api private
+      def self.option_parser(command_options, parsed_options)
+        OptionParser.new do |opts|
+          command_options.each do |option|
+            option_name = option.name.to_sym
+            opts.on(*option.parser_options) do |value|
+              value = option.cast(value)
+              if option.array?
+                parsed_options[option_name] ||= []
+                parsed_options[option_name] += value
+              else
+                parsed_options[option_name] = value
+              end
+            end
+          end
+
+          yield(opts) if block_given?
+        end
+      end
+
       # @since 0.1.0
       # @api private
       #

spec/support/shared_examples/commands.rb

@@ -160,6 +160,16 @@
         output = capture_output { cli.call(arguments: %w[exec test api admin]) }
         expect(output).to eq("exec - Task: test - Directories: [\"api\", \"admin\"]\n")
       end
+
+      it "captures repeated array options" do
+        output = capture_output { cli.call(arguments: %w[server --deps=dep42 --deps=dep43]) }
+
+        if RUBY_VERSION < "3.4"
+          expect(output).to eq("server - {:code_reloading=>true, :deps=>[\"dep42\", \"dep43\"]}\n")
+        else
+          expect(output).to eq("server - {code_reloading: true, deps: [\"dep42\", \"dep43\"]}\n")
+        end
+      end
     end
 
     context "with supported values" do