[gnome-builder/wip/gtk4-port] plugins/flatpak: add aux helper for run context

[Christian Hergert <chergert src gnome org>]

commit 777cd37c8412edb08f5554c6eab92475647c3679
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jun 21 21:48:33 2022 -0700

    plugins/flatpak: add aux helper for run context

 src/plugins/flatpak/gbp-flatpak-aux.c | 21 +++++++++++++++++++++
 src/plugins/flatpak/gbp-flatpak-aux.h |  8 +++++---
 2 files changed, 26 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-aux.c b/src/plugins/flatpak/gbp-flatpak-aux.c
index 14f3b04c7..6d74f9f52 100644
--- a/src/plugins/flatpak/gbp-flatpak-aux.c
+++ b/src/plugins/flatpak/gbp-flatpak-aux.c
@@ -182,3 +182,24 @@ gbp_flatpak_aux_apply (IdeSubprocessLauncher *launcher,
 
   return count;
 }
+
+void
+gbp_flatpak_aux_append_to_run_context (IdeRunContext *run_context)
+{
+  static const char *arg;
+
+  g_return_if_fail (IDE_IS_RUN_CONTEXT (run_context));
+  g_return_if_fail (initialized);
+
+  if (arg == NULL)
+    arg = g_strdup_printf ("--bind-mount=/run/host/font-dirs.xml=%s",
+                           g_file_peek_path (mapped));
+
+  for (guint i = 0; i < maps->len; i++)
+    {
+      const char *element = g_ptr_array_index (maps, i);
+      ide_run_context_append_argv (run_context, element);
+    }
+
+  ide_run_context_append_argv (run_context, arg);
+}
diff --git a/src/plugins/flatpak/gbp-flatpak-aux.h b/src/plugins/flatpak/gbp-flatpak-aux.h
index 6c01a35d4..4a270b827 100644
--- a/src/plugins/flatpak/gbp-flatpak-aux.h
+++ b/src/plugins/flatpak/gbp-flatpak-aux.h
@@ -20,12 +20,14 @@
 
 #pragma once
 
+#include <libide-foundry.h>
 #include <libide-threading.h>
 
 G_BEGIN_DECLS
 
-void gbp_flatpak_aux_init  (void);
-int  gbp_flatpak_aux_apply (IdeSubprocessLauncher *launcher,
-                            int                    position);
+void gbp_flatpak_aux_init                  (void);
+int  gbp_flatpak_aux_apply                 (IdeSubprocessLauncher *launcher,
+                                            int                    position);
+void gbp_flatpak_aux_append_to_run_context (IdeRunContext         *run_context);
 
 G_END_DECLS