[gnome-builder/gnome-builder-3-28] flatpak: ensure we give the application access to document portal

[Christian Hergert <chergert src gnome org>]

commit 0de9942d62dcd7f8941341247deb306d62ef3713
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 17 13:09:34 2018 +0100

    flatpak: ensure we give the application access to document portal
    
    We probably need to make something more generic for all of the portals
    that applications may need access to. However, this fixes the immediate
    problem.

 src/plugins/flatpak/gbp-flatpak-runner.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-runner.c b/src/plugins/flatpak/gbp-flatpak-runner.c
index 1be611588..fc2b4f6ee 100644
--- a/src/plugins/flatpak/gbp-flatpak-runner.c
+++ b/src/plugins/flatpak/gbp-flatpak-runner.c
@@ -53,10 +53,12 @@ gbp_flatpak_runner_fixup_launcher (IdeRunner             *runner,
                                    IdeSubprocessLauncher *launcher)
 {
   GbpFlatpakRunner *self = (GbpFlatpakRunner *)runner;
+  g_autofree gchar *doc_portal = NULL;
   IdeConfigurationManager *config_manager;
   IdeConfiguration *config;
   IdeEnvironment *env;
   g_auto(GStrv) environ = NULL;
+  const gchar *app_id;
   IdeContext *context;
   guint i = 0;
 
@@ -66,11 +68,16 @@ gbp_flatpak_runner_fixup_launcher (IdeRunner             *runner,
   context = ide_object_get_context (IDE_OBJECT (self));
   config_manager = ide_context_get_configuration_manager (context);
   config = ide_configuration_manager_get_current (config_manager);
+  app_id = ide_configuration_get_app_id (config);
+
+  doc_portal = g_strdup_printf ("--bind-mount=/run/user/%u/doc=/run/user/%u/doc/by-app/%s",
+                                getuid (), getuid (), app_id);
 
   ide_subprocess_launcher_insert_argv (launcher, i++, "flatpak");
   ide_subprocess_launcher_insert_argv (launcher, i++, "build");
   ide_subprocess_launcher_insert_argv (launcher, i++, "--with-appdir");
   ide_subprocess_launcher_insert_argv (launcher, i++, "--allow=devel");
+  ide_subprocess_launcher_insert_argv (launcher, i++, doc_portal);
 
   if (GBP_IS_FLATPAK_MANIFEST (config))
     {