reflog: add API to read or write a reference log

So far libgit2 didn't support reference logs (reflog). Add a new
git_reflog_* API for basic reading and writing of reflogs:

* git_reflog_read
* git_reflog_write
* git_reflog_free

Signed-off-by: schu <schu-github@schulog.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/reflog.h b/src/reflog.h
new file mode 100644
index 000000000..da352ca8f
--- /dev/null
+++ b/src/reflog.h
@@ -0,0 +1,26 @@
+#ifndef INCLUDE_reflog_h__
+#define INCLUDE_reflog_h__
+
+#include "common.h"
+#include "git2/reflog.h"
+#include "vector.h"
+
+#define GIT_REFLOG_DIR "logs/"
+
+#define GIT_REFLOG_SIZE_MIN (2*GIT_OID_HEXSZ+2+17)
+
+struct git_reflog_entry {
+	char *oid_old;
+	char *oid_cur;
+
+	git_signature *committer;
+
+	char *msg;
+};
+
+struct git_reflog {
+	char *ref_name;
+	git_vector entries;
+};
+
+#endif /* INCLUDE_reflog_h__ */