fuchsia_web/shell/shell_relauncher.cc

   1 // Copyright 2023 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "fuchsia_web/shell/shell_relauncher.h"
   6
   7 #include <fuchsia/component/cpp/fidl.h>
   8 #include <lib/sys/component/cpp/testing/realm_builder.h>
   9 #include <zircon/types.h>
  10
  11 #include <string>
  12 #include <utility>
  13
  14 #include "base/command_line.h"
  15 #include "base/functional/callback.h"
  16 #include "base/run_loop.h"
  17 #include "fuchsia_web/common/test/test_realm_support.h"
  18
  19 absl::optional<int> RelaunchForWebInstanceHostIfParent(
  20     base::StringPiece relative_component_url,
  21     const base::CommandLine& command_line) {
  22   // Nothing to do if running from the context of a relaunched process.
  23   static constexpr char kNoRelaunch[] = "no-relaunch";
  24   if (command_line.HasSwitch(kNoRelaunch)) {
  25     return absl::nullopt;
  26   }
  27
  28   auto realm_builder = component_testing::RealmBuilder::CreateFromRelativeUrl(
  29       {relative_component_url.data(), relative_component_url.length()});
  30   test::AppendCommandLineArgumentsForRealm(realm_builder,  // IN-TEST
  31                                            command_line);
  32
  33   auto realm = realm_builder.Build();
  34
  35   fuchsia::component::BinderPtr binder_proxy =
  36       realm.component().Connect<fuchsia::component::Binder>();
  37
  38   // Wait for binder_proxy to be closed.
  39   base::RunLoop run_loop;
  40   binder_proxy.set_error_handler(
  41       [quit_closure = run_loop.QuitClosure()](zx_status_t status) {
  42         std::move(quit_closure).Run();
  43       });
  44   run_loop.Run();
  45
  46   // Nothing depends on the process exit code of web_engine_shell today, so
  47   // simply return success in all cases.
  48   return 0;
  49 }