notmuch_message_tags_to_maildir_flags: Do nothing outside of "new" and "cur"

Some people use notmuch with non-maildir files, (for example, email
messages in MH format, or else cool things like using sluk[*] to suck
down feeds into a format that notmuch can index).

To better support uses like that, don't do any renaming for files that
are not in a directory named either "new" or "cur".

[*] https://github.com/krl/sluk/

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/notmuch.h b/lib/notmuch.h
index ea12fe76..d2deca1e 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -947,9 +947,13 @@ notmuch_message_maildir_flags_to_tags (notmuch_message_t *message);
  *
  * Specifically, for each filename corresponding to this message:
  *
- * Rename the file so that its filename ends with the sequence ":2,"
- * followed by zero or more of the following single-character flags
- * (in ASCII order):
+ * If the filename is not in a maildir directory, do nothing.
+ * (A maildir directory is determined as a directory named "new" or
+ * "cur".)
+ *
+ * If the filename is in a maildir directory, rename the file so that
+ * its filename ends with the sequence ":2," followed by zero or more
+ * of the following single-character flags (in ASCII order):
  *
  *   'D' iff the message has the "draft" tag
  *   'F' iff the message has the "flagged" tag