[PATCH 1/3] sha1_file: add function to insert alternate object db

[Lars Hjemli <hjemli@gmail.com>]

This function will be used when implementing traversal into submodules.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
---
 cache.h     |    1 +
 sha1_file.c |    5 +++++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/cache.h b/cache.h
index 8e1af26..daa2d4e 100644
--- a/cache.h
+++ b/cache.h
@@ -724,6 +724,7 @@ extern struct alternate_object_database {
 	char base[FLEX_ARRAY]; /* more */
 } *alt_odb_list;
 extern void prepare_alt_odb(void);
+extern int add_alt_odb(const char *path);
 extern void add_to_alternates_file(const char *reference);
 typedef int alt_odb_fn(struct alternate_object_database *, void *);
 extern void foreach_alt_odb(alt_odb_fn, void*);
diff --git a/sha1_file.c b/sha1_file.c
index f08493f..19f9725 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -356,6 +356,11 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 	}
 }
 
+int add_alt_odb(const char *path)
+{
+	return link_alt_odb_entry(path, strlen(path), NULL, 0);
+}
+
 static void read_info_alternates(const char * relative_base, int depth)
 {
 	char *map;
-- 
1.6.1.150.g5e733b