Refactoring

lib/byebug/command.rb

@@ -25,6 +25,15 @@ class Command
     SubcmdStruct = Struct.new(:name, :min, :short_help, :long_help) unless
       defined?(SubcmdStruct)
 
+    def print_subcommands
+      cmd_name = self.class.name.chomp("Command").downcase
+      errmsg "#{cmd_name} must be followed by the name of a subcommand.\n"
+      print "List of #{cmd_name} subcommands:\n\n"
+      for subcmd in Subcommands do
+        print "#{cmd_name} #{subcmd.name} -- #{subcmd.short_help}\n"
+      end
+    end
+
     include Columnize
 
     # Find param in subcmds. param id downcased and can be abbreviated

lib/byebug/commands/info.rb

@@ -88,11 +88,7 @@ def regexp
 
     def execute
       if !@match[1]
-        errmsg "\"info\" must be followed by the name of an info command:\n"
-        print "List of info subcommands:\n\n"
-        for subcmd in Subcommands do
-          print "info #{subcmd.name} -- #{subcmd.short_help}\n"
-        end
+        print_subcommands
       else
         args = @match[1].split(/[ \t]+/)
         param = args.shift

lib/byebug/commands/set.rb

@@ -47,11 +47,7 @@ def regexp
 
     def execute
       if not @match[1]
-        print "\"set\" must be followed by the name of an set command:\n"
-        print "List of set subcommands:\n\n"
-        for subcmd in Subcommands do
-          print "set #{subcmd.name} -- #{subcmd.short_help}\n"
-        end
+        print_subcommands
       else
         args = @match[1].split(/[ \t]+/)
         subcmd = args.shift

lib/byebug/commands/show.rb

@@ -194,11 +194,7 @@ def regexp
 
     def execute
       if not @match[1]
-        print "\"show\" must be followed by the name of an show command:\n"
-        print "List of show subcommands:\n\n"
-        for subcmd in Subcommands do
-          print "show #{subcmd.name} -- #{subcmd.short_help}\n"
-        end
+        print_subcommands
       else
         args = @match[1].split(/[ \t]+/)
         param = args.shift

lib/byebug/processor.rb

@@ -148,7 +148,6 @@ def at_tracing(context, file, line)
       # Don't trace ourselves
       return if defined?(Byebug::RDEBUG_FILE) && Byebug::RDEBUG_FILE == file
 
-      #@last_file = CommandProcessor.canonic_file(file)
       file = CommandProcessor.canonic_file(file)
       unless file == @last_file and line == @last_line and
              Command.settings[:tracing_plus]

old_doc/byebug.texi

@@ -1530,19 +1530,17 @@ l[ist] nn-mm	list given lines
 
 @node Help for Subcommands
 @subsection Help on Subcommands
-A number of commands have many sub-parameters or
-@emph{subcommands}. These include @code{info}, @code{set},
-@code{show}, @code{enable} and @code{disable}.
-
-When you ask for help for one of these commands, you will get help for
-all of the subcommands that that command offers. Sometimes you may
-want help that subcommand and to do this just follow the command with
-its subcommand name. For example @code{help set annotate} will just
-give help about the annotate command. Furthermore it will give longer
-help than the summary information that appears when you ask for
-help. You don't need to list the full subcommand name, but just enough
-of the letters to make that subcommand distinct from others will
-do. For example, @code{help set an} is the same as @code{help set annotate}.
+A number of commands have many sub-parameters or @emph{subcommands}. These
+include @code{info}, @code{set}, @code{show}, @code{enable} and @code{disable}.
+
+When you ask for help for one of these commands, you will get help for all of
+the subcommands that that command offers. Sometimes you may want help that
+subcommand and to do this just follow the command with its subcommand name. For
+example @code{help set annotate} will just give help about the annotate command.
+Furthermore it will give longer help than the summary information that appears
+when you ask for help. You don't need to list the full subcommand name, but just
+enough of the letters to make that subcommand distinct from others will do. For
+example, @code{help set an} is the same as @code{help set annotate}.
 
 Some examples follow.
 @example