Commit 9507a434c6a1e70ccd8a2678fe35b092105be1db
2012-11-28T10:47:10
odb: Add `git_odb_add_disk_alternate` Loads a disk alternate by path to the ODB. Mimics the `GIT_ALTERNATE_OBJECT_DIRECTORIES` shell var.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
diff --git a/include/git2/odb.h b/include/git2/odb.h
index f2633d1..3854fa6 100644
--- a/include/git2/odb.h
+++ b/include/git2/odb.h
@@ -89,6 +89,23 @@ GIT_EXTERN(int) git_odb_add_backend(git_odb *odb, git_odb_backend *backend, int
GIT_EXTERN(int) git_odb_add_alternate(git_odb *odb, git_odb_backend *backend, int priority);
/**
+ * Add an on-disk alternate to an existing Object DB.
+ *
+ * Note that the added path must point to an `objects`, not
+ * to a full repository, to use it as an alternate store.
+ *
+ * Alternate backends are always checked for objects *after*
+ * all the main backends have been exhausted.
+ *
+ * Writing is disabled on alternate backends.
+ *
+ * @param odb database to add the backend to
+ * @param path path to the objects folder for the alternate
+ * @return 0 on success; error code otherwise
+ */
+GIT_EXTERN(int) git_odb_add_disk_alternate(git_odb *odb, const char *path);
+
+/**
* Close an open object database.
*
* @param db database pointer to close. If NULL no action is taken.
diff --git a/src/odb.c b/src/odb.c
index e622eb0..63b6828 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -470,6 +470,11 @@ static int load_alternates(git_odb *odb, const char *objects_dir, int alternate_
return result;
}
+int git_odb_add_disk_alternate(git_odb *odb, const char *path)
+{
+ return add_default_backends(odb, path, 1, 0);
+}
+
int git_odb_open(git_odb **out, const char *objects_dir)
{
git_odb *db;
@@ -481,8 +486,7 @@ int git_odb_open(git_odb **out, const char *objects_dir)
if (git_odb_new(&db) < 0)
return -1;
- if (add_default_backends(db, objects_dir, 0, 0) < 0)
- {
+ if (add_default_backends(db, objects_dir, 0, 0) < 0) {
git_odb_free(db);
return -1;
}