added resources module, with !ram and !resources, to examine resource usage

[erebus.git] / ctlmod.py

diff --git a/ctlmod.py b/ctlmod.py
index 25046aad38b0823ea098a3e6eac18844f8c2933b..0a4c784510641a6779b05157fa22bcaeff5c620b 100644 (file)
--- a/ctlmod.py
+++ b/ctlmod.py
@@ -1,3 +1,6 @@
+# Erebus IRC bot - Author: John Runyon
+# module loading/unloading/tracking code
+
 import sys
 import modlib
 
@@ -5,14 +8,24 @@ modules = {}
 dependents = {}
 
 def isloaded(modname): return modname in modules
-def modhas(modname, attname): return getattr(self.modules[modname], attname, None) is not None
+def modhas(modname, attname): return getattr(modules[modname], attname, None) is not None
 
 def load(parent, modname):
        if not isloaded(modname):
-               mod = __import__(modname)
-               reload(mod)
+               sys.path.insert(0, 'modules')
+               try:
+                       mod = __import__(modname)
+                       reload(mod) #in case it's been previously loaded.
+               except BaseException as e: #we don't want even sys.exit() to crash us (in case of malicious module) so use BaseException
+                       return modlib.error(e)
+               finally:
+                       del sys.path[0] #remove ./modules from path, in case there's a name conflict
+                       
+
+               if not hasattr(mod, 'modinfo'):
+                       return modlib.error('no modinfo')
 
-               if 1 not in mod.modinfo['compatible']:
+               if parent.APIVERSION not in mod.modinfo['compatible']:
                        return modlib.error('API-incompatible')
 
                modules[modname] = mod
@@ -42,22 +55,29 @@ def unload(parent, modname):
                        unload(parent, dependent)
                for dep in dependents[modname]:
                        dependents[dep].remove(modname)
-               self.modules[modname].modstop(parent)
+               ret = modules[modname].modstop(parent)
+               del modules[modname]
+               return ret
        else:
                return modlib.error('already unloaded')
 
 def reloadmod(parent, modname):
        if isloaded(modname):
-               if modhas(modname, 'modrestart'): self.modules[modname].modrestart(parent)
-               else: self.modules[modname].modstop(parent)
+               if modhas(modname, 'modrestart'): modules[modname].modrestart(parent)
+               else: modules[modname].modstop(parent)
 
-               reload(self.modules[modname])
+               try:
+                       reload(modules[modname])
+               except BaseException as e:
+                       return modlib.error(e)
 
-               if modhas(modname, 'modrestarted'): self.modules[modname].modrestarted(parent)
-               else: self.modules[modname].modstart(parent)
+               if modhas(modname, 'modrestarted'): ret = modules[modname].modrestarted(parent)
+               else: ret = modules[modname].modstart(parent)
 
+               return ret
        else:
-               load(parent, modname)
+               return load(parent, modname)
+
 
 def loadall(parent, modlist):
        for m in modlist: load(parent, m)