Merge branch 'fix_osc_lock' of https://github.com/lethliel/osc

The "input" parameter of the metafile's __init__ method can be a bytes
now. (Also, fixes one bug + introduces a new one (old code could break
on an empty bytes b'' and the new code could break on an empty list
(however, the current osc code shouldn't pass such arguments)).)

osc/core.py

@@ -3660,12 +3660,19 @@ class metafile:
         self.url = url
         self.change_is_required = change_is_required
         (fd, self.filename) = tempfile.mkstemp(prefix = 'osc_metafile.', suffix = file_ext)
-        if not input or isinstance(input[0], str) or isinstance(input, str):
-            f = os.fdopen(fd, 'w')
-            f.write(''.join(input))
+
+        open_mode = 'w'
+        input_as_str = None
+
+        if not isinstance(input, list):
+            input = [input]
+        if isinstance(input[0], str):
+            input_as_str = ''.join(input)
         else:
-            f = os.fdopen(fd, 'wb')
-            f.write(b''.join(input))
+            open_mode = 'wb'
+            input_as_str = b''.join(input)
+        f = os.fdopen(fd, open_mode)
+        f.write(input_as_str)
         f.close()
         self.hash_orig = dgst(self.filename)