[PATCH 5/5] update-index: enable/disable watchman support

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/update-index.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index 7431938..86aec21 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -903,6 +903,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 {
 	int newfd, entries, has_errors = 0, line_termination = '\n';
 	int untracked_cache = -1;
+	int use_watchman = -1;
 	int read_from_stdin = 0;
 	int prefix_length = prefix ? strlen(prefix) : 0;
 	int preferred_index_format = 0;
@@ -998,6 +999,8 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 			N_("enable/disable untracked cache")),
 		OPT_SET_INT(0, "force-untracked-cache", &untracked_cache,
 			    N_("enable untracked cache without testing the filesystem"), 2),
+		OPT_BOOL(0, "watchman", &use_watchman,
+			N_("use or not use watchman to reduce refresh cost")),
 		OPT_END()
 	};
 
@@ -1127,6 +1130,14 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 		the_index.cache_changed |= UNTRACKED_CHANGED;
 	}
 
+	if (use_watchman > 0) {
+		the_index.last_update    = xstrdup("");
+		the_index.cache_changed |= WATCHMAN_CHANGED;
+	} else if (!use_watchman) {
+		the_index.last_update    = NULL;
+		the_index.cache_changed |= WATCHMAN_CHANGED;
+	}
+
 	if (active_cache_changed) {
 		if (newfd < 0) {
 			if (refresh_args.flags & REFRESH_QUIET)
-- 
2.2.0.513.g477eb31