[fuchsia] create component context in main (#25290)

shell/platform/fuchsia/dart_runner/BUILD.gn

@@ -65,6 +65,7 @@ template("runner") {
              "$fuchsia_sdk_root/pkg:async-loop-cpp",
              "$fuchsia_sdk_root/pkg:async-loop-default",
              "$fuchsia_sdk_root/pkg:fidl_cpp",
+             "$fuchsia_sdk_root/pkg:sys_inspect_cpp",
              "$fuchsia_sdk_root/pkg:sys_cpp",
              "$fuchsia_sdk_root/pkg:syslog",
              "$fuchsia_sdk_root/pkg:trace",

shell/platform/fuchsia/dart_runner/main.cc

@@ -4,6 +4,7 @@
 
 #include <lib/async-loop/cpp/loop.h>
 #include <lib/async-loop/default.h>
+#include <lib/sys/inspect/cpp/component.h>
 #include <lib/syslog/global.h>
 #include <lib/trace-provider/provider.h>
 #include <lib/trace/event.h>
@@ -34,6 +35,14 @@ static void RegisterProfilerSymbols(const char* symbols_path,
 int main(int argc, const char** argv) {
   async::Loop loop(&kAsyncLoopConfigAttachToCurrentThread);
 
+  // Create our component context which is served later.
+  auto context = sys::ComponentContext::Create();
+  sys::ComponentInspector inspector(context.get());
+
+  inspect::Node& root = inspector.inspector()->GetRoot();
+
+  dart::SetDartVmNode(std::make_unique<inspect::Node>(root.CreateChild("vm")));
+
   std::unique_ptr<trace::TraceProviderWithFdio> provider;
   {
     bool already_started;
@@ -51,7 +60,11 @@ int main(int argc, const char** argv) {
 #endif  // !defined(DART_PRODUCT)
 
   dart_utils::RunnerTemp runner_temp;
-  dart_runner::DartRunner runner(dart::ComponentContext());
+  dart_runner::DartRunner runner(context.get());
+
+  // Wait to serve until we have finished all of our setup.
+  context->outgoing()->ServeFromStartupInfo();
+
   loop.Run();
   return 0;
 }

shell/platform/fuchsia/flutter/BUILD.gn

@@ -124,6 +124,7 @@ template("runner_sources") {
     public_deps = [
                     "$fuchsia_sdk_root/pkg:scenic_cpp",
                     "$fuchsia_sdk_root/pkg:sys_cpp",
+                    "$fuchsia_sdk_root/pkg:sys_inspect_cpp",
                     "//flutter/shell/platform/fuchsia/runtime/dart/utils",
                   ] + flutter_public_deps
 

shell/platform/fuchsia/flutter/main.cc

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include <lib/async-loop/cpp/loop.h>
+#include <lib/sys/inspect/cpp/component.h>
 #include <lib/trace-provider/provider.h>
 #include <lib/trace/event.h>
 
@@ -16,6 +17,16 @@
 int main(int argc, char const* argv[]) {
   std::unique_ptr<async::Loop> loop(flutter_runner::MakeObservableLoop(true));
 
+  // Create our component context which is served later.
+  auto context = sys::ComponentContext::Create();
+  sys::ComponentInspector inspector(context.get());
+
+  inspect::Node& root = inspector.inspector()->GetRoot();
+
+  // We inject the 'vm' node into the dart vm so that it can add any inspect
+  // data that it needs to the inspect tree.
+  dart::SetDartVmNode(std::make_unique<inspect::Node>(root.CreateChild("vm")));
+
   std::unique_ptr<trace::TraceProviderWithFdio> provider;
   {
     bool already_started;
@@ -29,7 +40,10 @@ int main(int argc, char const* argv[]) {
 
   FML_DLOG(INFO) << "Flutter application services initialized.";
 
-  flutter_runner::Runner runner(loop.get(), dart::ComponentContext());
+  flutter_runner::Runner runner(loop.get(), context.get());
+
+  // Wait to serve until we have finished all of our setup.
+  context->outgoing()->ServeFromStartupInfo();
 
   loop->Run();
   FML_DLOG(INFO) << "Flutter application services terminated.";