Added new SCRIPT_ROOT variable to settings.py, you'll need to copy this over from settings.py.dist if you're running a test game. We also now have rudimentary support for default, enter, and use locks per the basicobject.py file. Take a look at the example locks in there. A returned boolean value determines whether the player passes. Make sure you emit an error message within the lock if you're going to return false. We will have simple in-game attribute or dbref locks via an @lock command similar to MUX/MUSH that override scripted behaviors.

cmdhandler.py

@@ -159,11 +159,16 @@ def handle(cdat):
          pobject = session.get_pobject()
          exit_matches = match_exits(pobject, ' '.join(parsed_input['splitted']))
          if exit_matches:
-            exit = exit_matches[0]
-            if exit.get_home():
+            targ_exit = exit_matches[0]
+            if targ_exit.get_home():
                cdat['uinput'] = parsed_input
-               pobject.move_to(exit.get_home())
-               session.execute_cmd("look")
+               
+               # SCRIPT: See if the player can traverse the exit
+               if not targ_exit.get_scriptlink().default_lock(pobject):
+                  session.msg("You can't traverse that exit.")
+               else:
+                  pobject.move_to(targ_exit.get_home())
+                  session.execute_cmd("look")
             else:
                session.msg("That exit leads to nowhere.")
             return

scripthandler.py

@@ -1,6 +1,7 @@
 import os
 from traceback import format_exc
 
+import settings
 import functions_general
 """
 This module is responsible for managing scripts and their connection to the
@@ -31,9 +32,6 @@ def scriptlink(source_obj, scriptname):
    if retval:
       return retval.class_factory(source_obj)
    
-   # Store the original working directory so we can revert.
-   orig_path = os.getcwd()
-   
    # Split the script name up by periods to give us the directory we need
    # to change to. I really wish we didn't have to do this, but there's some
    # strange issue with __import__ and more than two directories worth of
@@ -45,22 +43,22 @@ def scriptlink(source_obj, scriptname):
 
    try:
       # Change the working directory to the location of the script and import.
-      os.chdir('scripts/%s/' % (newpath_str))
+      os.chdir('%s/%s/' % (settings.SCRIPT_ROOT, newpath_str))
       functions_general.log_infomsg("SCRIPT: Caching and importing %s." % (modname))
       modreference = __import__(modname)
       # Store the module reference for later fast retrieval.
       cached_scripts[scriptname] = modreference
    except ImportError:
       functions_general.log_infomsg('Error importing %s: %s' % (modname, format_exc()))
-      os.chdir(orig_path)
+      os.chdir(settings.BASE_PATH)
       return
    except OSError:
       functions_general.log_infomsg('Invalid module path: %s' % (format_exc()))
-      os.chdir(orig_path)
+      os.chdir(settings.BASE_PATH)
       return
 
    # Change back to the original working directory.
-   os.chdir(orig_path)
+   os.chdir(settings.BASE_PATH)
 
    # The new script module has been cached, return the reference.
    return modreference.class_factory(source_obj)

scripts/basicobject.py

@@ -41,6 +41,39 @@ class BasicObject:
       # Un-comment the line below for an example
       #print "SCRIPT TEST: %s got %s." % (actor, self.source_obj)
       pass
+
+   def default_lock(self, actor):
+      """
+      This method returns a True or False boolean value to determine whether
+      the actor passes the lock. This is generally used for picking up
+      objects or traversing exits.
+      
+      actor: (Object) Reference to the person attempting an action
+      """
+      # Assume everyone passes the default lock by default.
+      return True
+
+   def use_lock(self, actor):
+      """
+      This method returns a True or False boolean value to determine whether
+      the actor passes the lock. This is generally used for seeing whether
+      a player can use an object or any of its commands.
+      
+      actor: (Object) Reference to the person attempting an action
+      """
+      # Assume everyone passes the use lock by default.
+      return True
+
+   def enter_lock(self, actor):
+      """
+      This method returns a True or False boolean value to determine whether
+      the actor passes the lock. This is generally used for seeing whether
+      a player can enter another object.
+      
+      actor: (Object) Reference to the person attempting an action
+      """
+      # Assume everyone passes the enter lock by default.
+      return True
       
 def class_factory(source_obj):
    """

settings.py.dist

@@ -14,7 +14,7 @@ ADMINS = (
 
 MANAGERS = ADMINS
 
-# The path that contains this settings.py file.
+# The path that contains this settings.py file (no trailing slash).
 BASE_PATH = '/home/evennia/evennia' 
 
 # 'postgresql', 'mysql', 'mysql_old', 'sqlite3' or 'ado_mssql'.
@@ -52,10 +52,14 @@ USE_I18N = False
 # lighttpd).
 SERVE_MEDIA = False
 
-# Absolute path to the directory that holds media.
-# Example: "/home/media/media.lawrence.com/"
+# Absolute path to the directory that holds media (no trailing slash).
+# Example: "/home/media/media.lawrence.com"
 MEDIA_ROOT = '%s/media' % (BASE_PATH)
 
+# Absolute path to the directory that has the script tree in it. (no trailing slash)
+# Example: "/home/evennia/scripts"
+SCRIPT_ROOT = '%s/scripts' % (BASE_PATH)
+
 # URL that handles the media served from MEDIA_ROOT.
 # Example: "http://media.lawrence.com"
 MEDIA_URL = '/media/'