Added exception for bad function call.

We can use this to deliver *good* inforamtion to the user what went wrong, and how to rectify it if possible.

2 files changed, 11 insertions, 1 deletions

diff --git a/base/base.py b/base/base.py
index 68677bc..afa0df4 100644
--- a/base/base.py
+++ b/base/base.py
@@ -8,6 +8,7 @@ from os.path import join, dirname
 
 from module import Module
 from vars import __description__, __version__, header, prompt
+from exceptions import ModuleError, ExecutionException
 
 
 log = logging.getLogger('devshell')
@@ -165,7 +166,11 @@ def do_command(data, top=None):
                 params += [param]
     output = None
     if len(params):
-        output = top(*params)
+        try:
+            output = top(*params)
+        except ExecutionException, e:
+            # TODO: maket his as helpful as possible to the user
+            log.critical('execution of command failed because: %s' % e.message)
     
     if module:
         return output, module, mod_params
diff --git a/base/exceptions.py b/base/exceptions.py
index 471dd0e..221b73e 100644
--- a/base/exceptions.py
+++ b/base/exceptions.py
@@ -2,3 +2,8 @@ class ModuleError(Exception):
     def __init__(self, reason, error):
         self.reason = reason
         self.error = error
+
+class ExecutionException(Exception):
+    def __init__(self, e, message):
+        self.e = e
+        self.message = message
\ No newline at end of file