From 4a4ca4796df6b81d5995f31e87e9e6a64c2b889d Mon Sep 17 00:00:00 2001
From: Christian Couder <christian.couder@gmail.com>
Date: Sun, 24 Jan 2016 16:28:19 +0100
Subject: [PATCH] dir: add {new,add}_untracked_cache()

Factor out code into new_untracked_cache() and
add_untracked_cache(), which will be used
in later commits.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/update-index.c | 11 +----------
 dir.c                  | 18 ++++++++++++++++++
 dir.h                  |  1 +
 3 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index fe7aaa34a41..5f8630c61b0 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -1123,16 +1123,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 			if (untracked_cache == UC_TEST)
 				return 0;
 		}
-		if (!the_index.untracked) {
-			struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
-			strbuf_init(&uc->ident, 100);
-			uc->exclude_per_dir = ".gitignore";
-			/* should be the same flags used by git-status */
-			uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
-			the_index.untracked = uc;
-		}
-		add_untracked_ident(the_index.untracked);
-		the_index.cache_changed |= UNTRACKED_CHANGED;
+		add_untracked_cache(&the_index);
 		report(_("Untracked cache enabled for '%s'"), get_git_work_tree());
 	} else if (untracked_cache == UC_DISABLE) {
 		if (the_index.untracked) {
diff --git a/dir.c b/dir.c
index d2a8f06b024..31eae37f5bf 100644
--- a/dir.c
+++ b/dir.c
@@ -1938,6 +1938,24 @@ void add_untracked_ident(struct untracked_cache *uc)
 	strbuf_addch(&uc->ident, 0);
 }
 
+static void new_untracked_cache(struct index_state *istate)
+{
+	struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
+	strbuf_init(&uc->ident, 100);
+	uc->exclude_per_dir = ".gitignore";
+	/* should be the same flags used by git-status */
+	uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
+	istate->untracked = uc;
+}
+
+void add_untracked_cache(struct index_state *istate)
+{
+	if (!istate->untracked) {
+		new_untracked_cache(istate);
+	add_untracked_ident(istate->untracked);
+	istate->cache_changed |= UNTRACKED_CHANGED;
+}
+
 static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
 						      int base_len,
 						      const struct pathspec *pathspec)
diff --git a/dir.h b/dir.h
index 7b5855dd80e..cfd3636bfec 100644
--- a/dir.h
+++ b/dir.h
@@ -308,4 +308,5 @@ void free_untracked_cache(struct untracked_cache *);
 struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz);
 void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked);
 void add_untracked_ident(struct untracked_cache *);
+void add_untracked_cache(struct index_state *istate);
 #endif