[PATCH v6 19/19] untracked-cache: config option

[David Turner <dturner@twopensource.com>]

Add a config option to populate the untracked cache.

For installations that have centrally-managed configuration, it's
easier to set a config once than to run update-index on every
repository.

Signed-off-by: David Turner <dturner@twopensource.com>
---
 Documentation/config.txt | 4 ++++
 read-cache.c             | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 385ea66..c7b76ef 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1848,6 +1848,10 @@ imap::
 	The configuration variables in the 'imap' section are described
 	in linkgit:git-imap-send[1].
 
+index.adduntrackedcache::
+	Automatically populate the untracked cache whenever the index
+	is written.
+
 index.addwatchmanextension::
 	Automatically add the watchman extension to the index whenever
 	it is written.
diff --git a/read-cache.c b/read-cache.c
index e56a644..40869fe 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2469,7 +2469,7 @@ static int do_write_index(struct index_state *istate, int newfd,
 	int entries = istate->cache_nr;
 	struct stat st;
 	struct strbuf previous_name_buf = STRBUF_INIT, *previous_name;
-	int watchman = 0;
+	int watchman = 0, untracked = 0;
 	uint64_t start = getnanotime();
 
 	for (i = removed = extended = 0; i < entries; i++) {
@@ -2499,6 +2499,11 @@ static int do_write_index(struct index_state *istate, int newfd,
 	    !the_index.last_update)
 		the_index.last_update = xstrdup("");
 
+	if (!git_config_get_bool("index.adduntrackedcache", &untracked) &&
+	    untracked &&
+	    !istate->untracked)
+	    add_untracked_cache(&the_index);
+
 	hdr_version = istate->version;
 
 	hdr.hdr_signature = htonl(CACHE_SIGNATURE);
-- 
2.4.2.767.g62658d5-twtrsrc