[PATCH v2 4/5] lib: Treat messages in new/ as maildir messages with no flags set

[Austin Clements <amdragon@MIT.EDU>]

Previously, notmuch new only synchronized maildir flags to tags for
files with a maildir "info" part.  Since messages in new/ don't have
an info part, notmuch would ignore them for flag-to-tag
synchronization.

This patch makes notmuch consider messages in new/ to be legitimate
maildir messages that simply have no maildir flags set.  The most
visible effect of this is that such messages now automatically get the
unread tag.
---
 lib/message.cc    |   20 +++++++++++++-------
 test/maildir-sync |    1 -
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/lib/message.cc b/lib/message.cc
index bbac2ff..978de06 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -1090,13 +1090,19 @@ notmuch_message_maildir_flags_to_tags (notmuch_message_t *message)
 	    continue;
 
 	flags = strstr (filename, ":2,");
-	if (! flags)
-	    continue;
-
-	seen_maildir_info = 1;
-	flags += 3;
-
-	combined_flags = talloc_strdup_append (combined_flags, flags);
+	if (flags) {
+	    seen_maildir_info = 1;
+	    flags += 3;
+	    combined_flags = talloc_strdup_append (combined_flags, flags);
+	} else if (STRNCMP_LITERAL (dir, "new/") == 0) {
+	    /* Messages are delivered to new/ with no "info" part, but
+	     * they effectively have default maildir flags.  According
+	     * to the spec, we should ignore the info part for
+	     * messages in new/, but some MUAs (mutt) can set maildir
+	     * flags on messages in new/, so we're liberal in what we
+	     * accept. */
+	    seen_maildir_info = 1;
+	}
     }
 
     /* If none of the filenames have any maildir info field (not even
diff --git a/test/maildir-sync b/test/maildir-sync
index 6360fd2..01348d3 100755
--- a/test/maildir-sync
+++ b/test/maildir-sync
@@ -167,7 +167,6 @@ notmuch tag +unread +draft -flagged subject:"Non-compliant maildir info"
 test_expect_equal "$(cd $MAIL_DIR/cur/; ls non-compliant*)" "non-compliant-maildir-info:2,These-are-not-flags-in-ASCII-order-donottouch"
 
 test_begin_subtest "Files in new/ get default synchronized tags"
-test_subtest_known_broken
 OLDCONFIG=$(notmuch config get new.tags)
 notmuch config set new.tags test
 add_message [subject]='"File in new/"' [dir]=new [filename]='file-in-new'
-- 
1.7.10