core: Allow adding related objects to commits

This will be used to store the set of components.

src/libostree/ostree-core.h

@@ -29,6 +29,8 @@ G_BEGIN_DECLS
 
 #define OSTREE_MAX_METADATA_SIZE (1 << 26)
 
+#define OSTREE_MAX_RECURSION (256)
+
 #define OSTREE_EMPTY_STRING_SHA256 "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
 
 typedef enum {

src/libostree/ostree-repo.c

@@ -1691,6 +1691,7 @@ ostree_repo_stage_commit (OstreeRepo *self,
                           const char   *subject,
                           const char   *body,
                           GVariant     *metadata,
+                          GVariant     *related_objects,
                           const char   *root_contents_checksum,
                           const char   *root_metadata_checksum,
                           char        **out_commit,
@@ -1712,8 +1713,7 @@ ostree_repo_stage_commit (OstreeRepo *self,
   commit = g_variant_new ("(@a{sv}@ay@a(say)sst@ay@ay)",
                           metadata ? metadata : create_empty_gvariant_dict (),
                           parent ? ostree_checksum_to_bytes_v (parent) : ot_gvariant_new_bytearray (NULL, 0),
-                          g_variant_new_array (G_VARIANT_TYPE ("(say)"),
-                                               NULL, 0),
+                          related_objects ? related_objects : g_variant_new_array (G_VARIANT_TYPE ("(say)"), NULL, 0),
                           subject, body ? body : "",
                           GUINT64_TO_BE (g_date_time_to_unix (now)),
                           ostree_checksum_to_bytes_v (root_contents_checksum),

src/libostree/ostree-repo.h

@@ -245,6 +245,7 @@ gboolean      ostree_repo_stage_commit (OstreeRepo   *self,
                                         const char   *subject,
                                         const char   *body,
                                         GVariant     *metadata,
+                                        GVariant     *related_objects,
                                         const char   *content_checksum,
                                         const char   *metadata_checksum,
                                         char        **out_commit,