Add set_git_dir() function

With the function set_git_dir() you can reset the path that will
be used for git_path(), git_dir() and friends.

The responsibility to close files and throw away information from the
old git_dir lies with the caller.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/cache.h b/cache.h
index 98af53040d..e1f94cbade 100644
--- a/cache.h
+++ b/cache.h
@@ -214,6 +214,7 @@ extern char *get_object_directory(void);
 extern char *get_refs_directory(void);
 extern char *get_index_file(void);
 extern char *get_graft_file(void);
+extern int set_git_dir(const char *path);
 
 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"