Add a much much simpler path normalizer and joiner.

I'm just so, so tired of futzing around with os.path.join() and
os.path.normalize() not doing their jobs usefully.

This version of normalize doesn't try to resolve .. or symlinks; it only
de-dupes slashes.  I can't find anywhere we depend on resolving ..  or
symlinks, so it's just not as pretty as it could be.

So basically if you need to normalize slashes, use
util.normalize_path_slashes() .  If you need to resolve symlinks, use
os.path.normalize()

Signed-off-by: Peter Jones <pjones@redhat.com>

blivet/util.py

@@ -213,6 +213,21 @@ def notify_kernel(path, action="change"):
     f.write("%s\n" % action)
     f.close()
 
+def normalize_path_slashes(path):
+    """ Normalize the slashes in a filesystem path.
+        Does not actually examine the filesystme in any way.
+    """
+    while "//" in path:
+        path = path.replace("//", "/")
+    return path
+
+def join_paths(*paths):
+    """ Joins filesystem paths without any consiration of slashes or
+        whatnot and then normalizes repeated slashes.
+    """
+    if len(paths) == 1 and hasattr(paths[0], "__iter__"):
+        return join_paths(*paths[0])
+    return normalize_path_slashes('/'.join(paths))
 
 def get_sysfs_attr(path, attr):
     if not attr:

tests/devicelibs_test/edd_test.py

@@ -55,7 +55,7 @@ def setUp(self):
         edd.log.addHandler(self.log_handler)
 
         self.td_log_handler = logging.FileHandler("%s/%s" %
-                                        (ws, "blivet-edd-testdata.log"))
+                                                  (ws, "blivet-edd-testdata.log"))
         self.td_log_handler.setLevel(logging.DEBUG)
         formatter = logging.Formatter("%(asctime)s %(levelname)s %(name)s: %(message)s")
         self.td_log_handler.setFormatter(formatter)