Handle prmd init with no arguments

lib/prmd.rb

@@ -3,6 +3,7 @@
 require_relative 'prmd/commands'
 require_relative 'prmd/schema'
 require_relative 'prmd/link'
+require_relative 'prmd/utils'
 require_relative 'prmd/template'
 require_relative 'prmd/url_generator'
 require_relative 'prmd/hash_helpers'

lib/prmd/cli/base.rb

@@ -33,8 +33,8 @@ def make_parser(options = {})
       # @param [Array<String>] argv
       # @return [Array<String>] remaining arguments
       # @private
-      def execute_parser(parser, argv)
-        parser.parse(argv)
+      def execute_parser(argv)
+        @parser.parse(argv)
       end
 
       # Set the given key and value in the given options Hash.
@@ -66,10 +66,10 @@ def set_option(options, key, value)
       # @return [Hash<Symbol, Object>] parsed options
       def parse_options(argv, options = {})
         opts = {}
-        parser = make_parser(options) do |key, value|
+        @parser = make_parser(options) do |key, value|
           set_option(opts, key, value)
         end
-        argv = execute_parser(parser, argv)
+        argv = execute_parser(argv)
         opts[:argv] = argv
         opts
       end

lib/prmd/cli/generate.rb

@@ -1,5 +1,6 @@
 require_relative 'base'
 require_relative '../commands/init'
+require_relative '../utils'
 
 module Prmd
   module CLI
@@ -40,7 +41,11 @@ def self.make_parser(options = {})
       # @return (see Prmd::CLI::Base#execute)
       def self.execute(options = {})
         name = options.fetch(:argv).first
-        write_result Prmd.init(name, options), options
+        if Prmd::Utils.blank?(name)
+          abort @parser
+        else
+          write_result Prmd.init(name, options), options
+        end
       end
     end
   end

lib/prmd/utils.rb

@@ -0,0 +1,19 @@
+module Prmd
+  # For any tid bits, or core extension methods, without the "core" extension
+  module Utils
+    # For checking if the string contains only spaces
+    BLANK_REGEX = /\A\s+\z/
+
+    def self.blank?(obj)
+      if obj.nil?
+        true
+      elsif obj.is_a?(String)
+        obj.empty? || !!(obj =~ BLANK_REGEX)
+      elsif obj.respond_to?(:empty?)
+        obj.empty?
+      else
+        false
+      end
+    end
+  end
+end

test/utils_test.rb

@@ -0,0 +1,16 @@
+require_relative 'helpers'
+
+class UtilsTest < Minitest::Test
+  def test_blank?
+    assert_equal true, Prmd::Utils.blank?(nil)
+    assert_equal true, Prmd::Utils.blank?([])
+    assert_equal true, Prmd::Utils.blank?({})
+    assert_equal true, Prmd::Utils.blank?("")
+    assert_equal true, Prmd::Utils.blank?(" ")
+    assert_equal true, Prmd::Utils.blank?("       ")
+    assert_equal false, Prmd::Utils.blank?([nil])
+    assert_equal false, Prmd::Utils.blank?({ a: nil })
+    assert_equal false, Prmd::Utils.blank?("A")
+    assert_equal false, Prmd::Utils.blank?(Object.new)
+  end
+end