noshortaliases. warn or raise if alias already exists

bin/example.rb

@@ -90,7 +90,7 @@ class Capture
 	end
 end
 
-cli.sub :tests, "Some tests" do |tcli|
+cli.sub :tests, "Some tests", noshortaliases: true do |tcli|
 	tcli.cmd( :'-', "No arguments no options expected", &lambda {|| $capture.args = [] })
 	tcli.cmd( :'arg', "", &lambda {|one| $capture.args = [one] })
 	tcli.cmd( :'oar', "", &lambda {|one=nil| $capture.args = [one] })
@@ -208,7 +208,6 @@ cli.cmd( :help, "An example for help", aliases: [nil, '-h', '--help'], &lambda {
 
 cli.sub( :more, "Sub-Commands are also possible with a new cli") do |sub|
 	sub.cmd( :help, "", aliases: [nil, '-h', '--help']) {|*args| $stderr.puts sub.help(*args) }
-	sub.cmd( :help, "") {|*args| $stderr.puts cli.help( 'more', *args) }
 	sub.cmd( :example, "Here is an example, too") { $stderr.puts "This is an other example" }
 	sub.cmd( :foo, "BAR") { $stderr.puts "FOO bar"}
 

lib/dencli/cmd.rb

@@ -4,9 +4,9 @@ require_relative '../dencli'
 class DenCli::CMD
 	attr_reader :parent, :name, :description, :exe, :completion, :options
 
-	def initialize parent, name, description, exe
+	def initialize parent, name, description, exe, noshortaliases: nil
 		raise "Proc expected, instead of: #{exe.inspect}"  unless Proc === exe
-		@parent, @name, @description, @exe = parent, name, description, lambda( &exe)
+		@parent, @name, @description, @exe, @noshortaliases = parent, name, description, lambda( &exe), noshortaliases
 		@parameters = @exe.parameters
 		@arguments_required = @exe.parameters.select {|e| :req == e[0] }.map {|e| e[1] }
 		@arguments_additional = @exe.parameters.select {|e| :opt == e[0] }.map {|e| e[1] }

lib/dencli/sub.rb

@@ -3,11 +3,12 @@ require_relative '../dencli'
 class DenCli::Sub
 	attr_reader :parent, :name, :description, :subs, :aliases
 
-	def initialize parent, name, description
+	def initialize parent, name, description, noshortaliases: nil
 		#DenCli::assert_type self, __method__, :name, name, Symbol
 		#DenCli::assert_type self, __method__, :parent, parent, DenCli, DenCli::Sub
 		#DenCli::assert_type self, __method__, :description, description, String
 		@parent, @name, @description, @subs, @aliases = parent, name, "-> #{description}", {}, {}
+		@noshortaliases = ! ! noshortaliases
 	end
 
 	def _full_cmd( post) parent._full_cmd [@name]+post end
@@ -118,21 +119,29 @@ class DenCli::Sub
 		#DenCli::assert_type self, __method__, :aliases, aliases, Array, NilClass
 		name = name.to_s  unless name.nil?
 		@subs[name] = obj
+		if @noshortaliases
 			DenCli.gen_aliases( name, min) {|a| @aliases[a] ||= obj }
+		else
+			warn "Alias already exists: #{full_cmd.join ' '} #{name}"  if @aliases.has_key? name
+			@aliases[name] = obj
+		end
 		if aliases
-			[*aliases].each {|a| @aliases[a] = obj }
+			[*aliases].each do |a|
+				raise ArgumentError, "Alias already exists: #{full_cmd.join ' '} #{a}"  if @aliases.has_key? a
+				@aliases[a] = obj
+			end
 		end
 		obj
 	end
 	private :_add
 
-	def sub name, description, min: nil, aliases: nil, &exe
-		r = _add name, min, DenCli::Sub.new( self, name, description), aliases
+	def sub name, description, min: nil, aliases: nil, noshortaliases: nil, &exe
+		r = _add name, min, DenCli::Sub.new( self, name, description, noshortaliases: noshortaliases), aliases
 		block_given? ? yield( r) : r
 	end
 
-	def cmd name, description, min: nil, aliases: nil, &exe
-		_add name, min, DenCli::CMD.new( self, name, description, exe), aliases
+	def cmd name, description, min: nil, aliases: nil, noshortaliases: nil, &exe
+		_add name, min, DenCli::CMD.new( self, name, description, exe, noshortaliases: noshortaliases), aliases
 	end
 
 	def complete *pre, str