image: Significantly refactor how backends are registered

1 files changed, 13 insertions, 0 deletions

diff --git a/image/backends/basic.hh b/image/backends/basic.hh
index d39c57e..3181f69 100644
--- a/image/backends/basic.hh
+++ b/image/backends/basic.hh
@@ -12,11 +12,21 @@
 
 #pragma once
 
+#include <functional>
 #include <string>
+#include <vector>
 
 namespace Horizon {
 namespace Image {
 
+class BasicBackend;
+
+struct BackendDescriptor {
+    std::string type_code;
+    std::string description;
+    std::function<BasicBackend *(std::string, std::string)> creation_fn;
+};
+
 class BasicBackend {
 public:
     /*! Create the backend object.
@@ -43,6 +53,9 @@ public:
      */
     virtual int finalise();
 
+    /*! Returns a list of available backends. */
+    static const std::vector<BackendDescriptor> available_backends();
+
     /*! The intermediate directory which contains the sysroot the image
      *  should contain. */
     const std::string &ir_dir;