odb: freshen existing objects when writing

When writing an object, we calculate its OID and see if it exists in the
object database.  If it does, we need to freshen the file that contains
it.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/odb_loose.c b/src/odb_loose.c
index 228d4c334..1653e2783 100644
--- a/src/odb_loose.c
+++ b/src/odb_loose.c
@@ -918,6 +918,23 @@ cleanup:
 	return error;
 }
 
+static int loose_backend__freshen(
+	git_odb_backend *_backend,
+	const git_oid *oid)
+{
+	loose_backend *backend = (loose_backend *)_backend;
+	git_buf path = GIT_BUF_INIT;
+	int error;
+
+	if (object_file_name(&path, backend, oid) < 0)
+		return -1;
+
+	error = git_futils_touch(path.ptr);
+	git_buf_free(&path);
+
+	return error;
+}
+
 static void loose_backend__free(git_odb_backend *_backend)
 {
 	loose_backend *backend;
@@ -975,6 +992,7 @@ int git_odb_backend_loose(
 	backend->parent.exists = &loose_backend__exists;
 	backend->parent.exists_prefix = &loose_backend__exists_prefix;
 	backend->parent.foreach = &loose_backend__foreach;
+	backend->parent.freshen = &loose_backend__freshen;
 	backend->parent.free = &loose_backend__free;
 
 	*backend_out = (git_odb_backend *)backend;