Factor out code into remove_untracked_cache(), which will be used
in a later commit.

Signed-off-by: Christian Couder <chrisc...@tuxfamily.org>
---
 builtin/update-index.c | 3 +--
 dir.c                  | 6 ++++++
 dir.h                  | 1 +
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/builtin/update-index.c b/builtin/update-index.c
index 5f009cf..4ca6d94 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -1127,8 +1127,7 @@ int cmd_update_index(int argc, const char **argv, const 
char *prefix)
                if (verbose)
                        printf(_("Untracked cache enabled\n"));
        } else if (untracked_cache == UC_DISABLE && the_index.untracked) {
-               the_index.untracked = NULL;
-               the_index.cache_changed |= UNTRACKED_CHANGED;
+               remove_untracked_cache();
                if (verbose)
                        printf(_("Untracked cache disabled\n"));
        }
diff --git a/dir.c b/dir.c
index 0f7e293..ffc0286 100644
--- a/dir.c
+++ b/dir.c
@@ -1952,6 +1952,12 @@ void add_untracked_cache(void)
        the_index.cache_changed |= UNTRACKED_CHANGED;
 }
 
+void remove_untracked_cache(void)
+{
+       the_index.untracked = NULL;
+       the_index.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 ee94c76..3e5114d 100644
--- a/dir.h
+++ b/dir.h
@@ -309,4 +309,5 @@ struct untracked_cache *read_untracked_extension(const void 
*data, unsigned long
 void write_untracked_extension(struct strbuf *out, struct untracked_cache 
*untracked);
 void add_untracked_ident(struct untracked_cache *);
 void add_untracked_cache(void);
+void remove_untracked_cache(void);
 #endif
-- 
2.6.3.479.g8eb29d4

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