[PATCH v4 08/11] lib: Report progress for combined upgrade operation

[Austin Clements]

Previously, some parts of upgrade didn't report progress and for
others it was possible for the progress meter to restart at 0 part way
through the upgrade because each stage was reported separately.

Fix this by computing the total amount of work that needs to be done
up-front and updating completed work monotonically.
---
 lib/database.cc | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/database.cc b/lib/database.cc
index 6a7ce29..53397bb 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -1241,6 +1241,19 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
 	timer_is_active = TRUE;
     }
 
+    /* Figure out how much total work we need to do. */
+    if (new_features &
+	(NOTMUCH_FEATURE_FILE_TERMS | NOTMUCH_FEATURE_BOOL_FOLDER)) {
+	notmuch_query_t *query = notmuch_query_create (notmuch, "");
+	total += notmuch_query_count_messages (query);
+	notmuch_query_destroy (query);
+    }
+    if (new_features & NOTMUCH_FEATURE_DIRECTORY_DOCS) {
+	t_end = db->allterms_end ("XTIMESTAMP");
+	for (t = db->allterms_begin ("XTIMESTAMP"); t != t_end; t++)
+	    ++total;
+    }
+
     /* Perform the upgrade in a transaction. */
     db->begin_transaction (true);
 
@@ -1256,8 +1269,6 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
 	notmuch_message_t *message;
 	char *filename;
 
-	total = notmuch_query_count_messages (query);
-
 	for (messages = notmuch_query_search_messages (query);
 	     notmuch_messages_valid (messages);
 	     notmuch_messages_move_to_next (messages))
@@ -1340,6 +1351,8 @@ notmuch_database_upgrade (notmuch_database_t *notmuch,
 
 		db->delete_document (*p);
 	    }
+
+	    ++count;
 	}
     }
 
-- 
2.0.0