Improve the ODB writing backend

Temporary files when doing streaming writes are now stored inside the
Objects folder, to prevent issues when moving files between
disks/partitions.

Add support for block writes to the ODB again (for those backends that
cannot implement streaming).

1 files changed, 35 insertions, 0 deletions

diff --git a/src/odb.c b/src/odb.c
index d825fd95c..33d5468d9 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -415,6 +415,41 @@ int git_odb_read(git_odb_object **out, git_odb *db, const git_oid *id)
 	return error;
 }
 
+int git_odb_write(git_oid *oid, git_odb *db, const void *data, size_t len, git_otype type)
+{
+	unsigned int i;
+	int error = GIT_ERROR;
+
+	assert(oid && db);
+
+	for (i = 0; i < db->backends.length && error < 0; ++i) {
+		backend_internal *internal = git_vector_get(&db->backends, i);
+		git_odb_backend *b = internal->backend;
+
+		/* we don't write in alternates! */
+		if (internal->is_alternate)
+			continue;
+
+		if (b->write != NULL)
+			error = b->write(oid, b, data, len, type);
+	}
+
+	/* if no backends were able to write the object directly, we try a streaming
+	 * write to the backends; just write the whole object into the stream in one
+	 * push */
+	if (error < GIT_SUCCESS) {
+		git_odb_stream *stream;
+
+		if ((error = git_odb_open_wstream(&stream, db, len, type)) == GIT_SUCCESS) {
+			stream->write(stream, data, len);
+			error = stream->finalize_write(oid, stream);
+			stream->free(stream);
+		}
+	}
+
+	return error;
+}
+
 int git_odb_open_wstream(git_odb_stream **stream, git_odb *db, size_t size, git_otype type)
 {
 	unsigned int i;