Assert that the argument to Run is a sequence of strings

This runtime assertion makes bugs easier to find.

In most other languages, we'd have been able to check this at compile
time. But this is Python. Yay!

Signed-off-by: Karl Hasselström <kha@treskal.com>

diff --git a/stgit/run.py b/stgit/run.py
index d925ccea68c6200f9aae90330ec5366a2d06c862..1bc47595b1f9dabb3bffbbf498b27cc839068e9a 100644 (file)
--- a/stgit/run.py
+++ b/stgit/run.py
@@ -31,6 +31,9 @@ class Run:
     exc = RunException
     def __init__(self, *cmd):
         self.__cmd = list(cmd)
+        for c in cmd:
+            if type(c) != str:
+                raise Exception, 'Bad command: %r' % cmd
         self.__good_retvals = [0]
         self.__env = None
         self.__indata = None