fixed alias behavior, trying to create an existing alias overwrites t…

…he old alias, fixed spelling error

lib/pik/commands/alias_command.rb

@@ -19,19 +19,19 @@ def execute
       end
     end
 
-    def create(pseudonum, name)
+    def create(pseudonym, name)
       if version = config.find_pattern(name)
-        config[version.first][:alias] = pseudonum
+        config.create_alias(version.first, pseudonym)
       else
         Log.error "Ruby version not found."
       end
     end
 
-    def delete(pseudonum)
-      if version = config.find_alias(pseudonum)
+    def delete(pseudonym)
+      if version = config.find_alias(pseudonym)
         config[version.first].delete(:alias)
       else
-        Log.error "Ruby version '#{pseudonum}' not found."
+        Log.error "Ruby version '#{pseudonym}' not found."
       end
     end
 

lib/pik/commands/use_command.rb

@@ -16,7 +16,7 @@ def execute
 
       ver_name, ver_config = *new_ver
 
-      ver_config[:alias] = 'default' if default
+      config.create_alias(ver_name,'default') if default
 
       switch_path_to(ver_config)
       switch_gem_home_to(ver_config[:gem_home])

lib/pik/config_file.rb

@@ -25,6 +25,11 @@ def initialize(file = File.join(Pik.home, 'config.yml'))
     def_delegators :@rubies, :[], :[]=, :clear, :sort, :find, :keys, 
       :delete, :each, :include?, :select
 
+    def create_alias(key, alias_name)
+      each{|name,data| data.delete_if{|k,v| k == :alias && v == alias_name  }}
+      self[key][:alias] = alias_name
+    end
+
     def match(string)
       find do |pattern, ver| 
         VersionPattern.parse(pattern).include?(string) || ver[:alias] == string