lib/repo-finder: Add OstreeRepoFinderOverride

This is another OstreeRepoFinder implementation; it returns results from
a given set of URIs. It’s designed to be used for implementing user
overrides to other repo-finders, or for implementing unit tests.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Closes: #1281
Approved by: mwleeds

src/libostree/ostree-repo-finder-override.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2017 Endless Mobile, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Authors:
+ *  - Philip Withnall <withnall@endlessm.com>
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+#include <glib.h>
+#include <glib-object.h>
+
+#include "ostree-repo-finder.h"
+#include "ostree-types.h"
+
+G_BEGIN_DECLS
+
+#define OSTREE_TYPE_REPO_FINDER_OVERRIDE (ostree_repo_finder_override_get_type ())
+
+/* Manually expanded version of the following, omitting autoptr support (for GLib < 2.44):
+_OSTREE_PUBLIC
+G_DECLARE_FINAL_TYPE (OstreeRepoFinderOverride, ostree_repo_finder_override, OSTREE, REPO_FINDER_OVERRIDE, GObject) */
+
+_OSTREE_PUBLIC
+GType ostree_repo_finder_override_get_type (void);
+
+G_GNUC_BEGIN_IGNORE_DEPRECATIONS
+typedef struct _OstreeRepoFinderOverride OstreeRepoFinderOverride;
+typedef struct { GObjectClass parent_class; } OstreeRepoFinderOverrideClass;
+
+static inline OstreeRepoFinderOverride *OSTREE_REPO_FINDER_OVERRIDE (gpointer ptr) { return G_TYPE_CHECK_INSTANCE_CAST (ptr, ostree_repo_finder_override_get_type (), OstreeRepoFinderOverride); }
+static inline gboolean OSTREE_IS_REPO_FINDER_OVERRIDE (gpointer ptr) { return G_TYPE_CHECK_INSTANCE_TYPE (ptr, ostree_repo_finder_override_get_type ()); }
+G_GNUC_END_IGNORE_DEPRECATIONS
+
+_OSTREE_PUBLIC
+OstreeRepoFinderOverride *ostree_repo_finder_override_new (void);
+
+_OSTREE_PUBLIC
+void ostree_repo_finder_override_add_uri (OstreeRepoFinderOverride *self,
+                                          const gchar              *uri);
+
+G_END_DECLS