[PATCH] cli: notmuch-show with framing newlines between threads in JSON.

[Mark Walters]

Add newlines between complete threads to make asynchronous parsing
of the JSON easier.
---

notmuch-pick uses the JSON output of notmuch show but, in many cases,
for many threads. This can take quite a long time when displaying a
large number of messages (say 20 seconds for the 10,000 messages in
the notmuch archive). Thus it is desirable to display results
incrementally in the same way that search currently does.

To make this easier this patch adds newlines between each toplevel
thread. So the ouput becomes

[
thread1
, thread2
, thread3
...
, last_thread
]

Thus the parser can easily tell if it has enough data to do some more
parsing.

Obviously, this changes the JSON output. This should not break any
consumer as the JSON parsers should not mind. However, it does break
several tests. Obviously, I will fix these but I wanted to check if
people were basically happy with the change first.

Also, should devel/schemata be updated? It seems a little unclear as
this is not really a "JSON" change as the JSON does not care about the
newlines.

Best wishes

Mark


 notmuch-show.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/notmuch-show.c b/notmuch-show.c
index 195e318..4a1d699 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -942,6 +942,8 @@ do_show (void *ctx,
 
     if (format->message_set_start)
 	fputs (format->message_set_start, stdout);
+    if (format == &format_json)
+	fputs ("\n", stdout);
 
     for (threads = notmuch_query_search_threads (query);
 	 notmuch_threads_valid (threads);
@@ -963,6 +965,9 @@ do_show (void *ctx,
 	if (status && !res)
 	    res = status;
 
+	if (format == &format_json)
+	    fputs ("\n", stdout);
+
 	notmuch_thread_destroy (thread);
 
     }
-- 
1.7.9.1