Demo protobufs in deno2.

Adds deno_set_response() to allow stack allocated responses.

1 files changed, 21 insertions, 1 deletions

diff --git a/deno2/main.cc b/deno2/main.cc
index 2c0b1b298..506469dfa 100644
--- a/deno2/main.cc
+++ b/deno2/main.cc
@@ -3,13 +3,33 @@
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <string>
 
+#include "./msg.pb.h"
 #include "include/deno.h"
 
+void MessagesFromJS(Deno* d, const char* channel, deno_buf buf) {
+  printf("MessagesFromJS %s\n", channel);
+
+  char cwdbuf[1024];
+  std::string cwd(getcwd(cwdbuf, sizeof(cwdbuf)));
+
+  deno::Msg response;
+  response.set_command(deno::Msg_Command_START);
+  response.set_start_cwd(cwd);
+
+  std::string output;
+  assert(response.SerializeToString(&output) == true);
+
+  auto bufout = deno_buf{output.c_str(), output.length()};
+  deno_set_response(d, bufout);
+}
+
 int main(int argc, char** argv) {
   deno_init();
 
-  Deno* d = deno_new(NULL, NULL);
+  Deno* d = deno_new(NULL, MessagesFromJS);
   bool r = deno_execute(d, "deno_main.js", "denoMain();");
   if (!r) {
     printf("Error! %s\n", deno_last_exception(d));