grab-attachments: put attachments in a folder named after the bug number which prevents clobbering of attachments if multiple bugs have the same attachment name

grab-attachments

@@ -56,6 +56,9 @@ def main():
 
             bug = launchpad.bugs[number]
 
+            os.mkdir('bug-%s' % number)
+            os.chdir('bug-%s' % number)
+
             for attachment in bug.attachments:
                 f = attachment.data.open()
                 filename = os.path.join(os.getcwd(), f.filename)
@@ -64,6 +67,8 @@ def main():
                 f.close()
                 local_file.close()
 
+            os.chdir('../')
+
     # no LP credentials
     except IOError, error:
         print error