[rtems-source-builder commit] sb/path: Walk up to root checking if a path is writable.

[Chris Johns]

Module:    rtems-source-builder
Branch:    master
Commit:    cabaff820674700d4ca1951dc059b51fcf852d48
Changeset: http://git.rtems.org/rtems-source-builder/commit/?id=cabaff820674700d4ca1951dc059b51fcf852d48

Author:    Chris Johns <chrisj at rtems.org>
Date:      Fri Apr 13 13:02:51 2018 +1000

sb/path: Walk up to root checking if a path is writable.

A dirname of / is / so the path will never have a length of 0.

Close #3392

---

 source-builder/sb/path.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source-builder/sb/path.py b/source-builder/sb/path.py
index f851139..e2fd3d4 100644
--- a/source-builder/sb/path.py
+++ b/source-builder/sb/path.py
@@ -143,7 +143,7 @@ def iswritable(path):
 
 def ispathwritable(path):
     path = shell(path)
-    while len(path) != 0:
+    while len(path) > 1:
         if exists(path):
             return iswritable(path)
         path = dirname(path)