7 files changed, 85 insertions, 184 deletions

diff --git a/cli/msg.fbs b/cli/msg.fbs
index 3a40b80f5..6744a0754 100644
--- a/cli/msg.fbs
+++ b/cli/msg.fbs
@@ -62,16 +62,11 @@ union Any {
   RunStatus,
   RunStatusRes,
   Seek,
-  SetEnv,
   Shutdown,
-  Start,
-  StartRes,
   Stat,
   StatRes,
   Symlink,
   Truncate,
-  HomeDir,
-  HomeDirRes,
   WorkerGetMessage,
   WorkerGetMessageRes,
   WorkerPostMessage,
@@ -167,25 +162,6 @@ table Base {
   inner: Any;
 }
 
-table Start {
-  unused: int8;
-}
-
-table StartRes {
-  cwd: string;
-  pid: uint32;
-  argv: [string];
-  main_module: string; // Absolute URL.
-  debug_flag: bool;
-  deps_flag: bool;
-  types_flag: bool;
-  version_flag: bool;
-  deno_version: string;
-  v8_version: string;
-  no_color: bool;
-  xeval_delim: string;
-}
-
 table FormatError {
   error: string;
 }
@@ -278,11 +254,6 @@ table GlobalTimerRes { }
 
 table GlobalTimerStop { }
 
-table SetEnv {
-  key: string;
-  value: string;
-}
-
 table KeyValue {
   key: string;
   value: string;
@@ -445,12 +416,6 @@ table Truncate {
   len: uint;
 }
 
-table HomeDir {}
-
-table HomeDirRes {
-  path: string;
-}
-
 table Open {
   filename: string;
   perm: uint;
diff --git a/cli/ops/dispatch_flatbuffers.rs b/cli/ops/dispatch_flatbuffers.rs
index b9dd4d9fa..d9aa2fb83 100644
--- a/cli/ops/dispatch_flatbuffers.rs
+++ b/cli/ops/dispatch_flatbuffers.rs
@@ -17,7 +17,6 @@ use super::fs::{
 };
 use super::metrics::op_metrics;
 use super::net::{op_accept, op_dial, op_listen, op_shutdown};
-use super::os::{op_home_dir, op_set_env, op_start};
 use super::performance::op_now;
 use super::permissions::{op_permissions, op_revoke_permission};
 use super::process::{op_kill, op_run, op_run_status};
@@ -183,13 +182,10 @@ pub fn op_selector_std(inner_type: msg::Any) -> Option<CliDispatchFn> {
     msg::Any::Run => Some(op_run),
     msg::Any::RunStatus => Some(op_run_status),
     msg::Any::Seek => Some(op_seek),
-    msg::Any::SetEnv => Some(op_set_env),
     msg::Any::Shutdown => Some(op_shutdown),
-    msg::Any::Start => Some(op_start),
     msg::Any::Stat => Some(op_stat),
     msg::Any::Symlink => Some(op_symlink),
     msg::Any::Truncate => Some(op_truncate),
-    msg::Any::HomeDir => Some(op_home_dir),
     msg::Any::Write => Some(op_write),
 
     // TODO(ry) split these out so that only the appropriate Workers can access
diff --git a/cli/ops/mod.rs b/cli/ops/mod.rs
index 240132960..d945c5e5f 100644
--- a/cli/ops/mod.rs
+++ b/cli/ops/mod.rs
@@ -34,6 +34,9 @@ pub const OP_IS_TTY: OpId = 4;
 pub const OP_ENV: OpId = 5;
 pub const OP_EXEC_PATH: OpId = 6;
 pub const OP_UTIME: OpId = 7;
+pub const OP_SET_ENV: OpId = 8;
+pub const OP_HOME_DIR: OpId = 9;
+pub const OP_START: OpId = 10;
 
 pub fn dispatch(
   state: &ThreadSafeState,
@@ -59,9 +62,18 @@ pub fn dispatch(
     OP_EXEC_PATH => {
       dispatch_json::dispatch(os::op_exec_path, state, control, zero_copy)
     }
+    OP_HOME_DIR => {
+      dispatch_json::dispatch(os::op_home_dir, state, control, zero_copy)
+    }
     OP_UTIME => {
       dispatch_json::dispatch(fs::op_utime, state, control, zero_copy)
     }
+    OP_SET_ENV => {
+      dispatch_json::dispatch(os::op_set_env, state, control, zero_copy)
+    }
+    OP_START => {
+      dispatch_json::dispatch(os::op_start, state, control, zero_copy)
+    }
     OP_FLATBUFFER => dispatch_flatbuffers::dispatch(state, control, zero_copy),
     _ => panic!("bad op_id"),
   };
diff --git a/cli/ops/os.rs b/cli/ops/os.rs
index 53ef63c60..afb87539f 100644
--- a/cli/ops/os.rs
+++ b/cli/ops/os.rs
@@ -1,15 +1,11 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
-use super::dispatch_flatbuffers::serialize_response;
 use super::dispatch_json::{Deserialize, JsonOp, Value};
-use super::utils::*;
 use crate::ansi;
 use crate::fs as deno_fs;
-use crate::msg;
 use crate::state::ThreadSafeState;
 use crate::version;
 use atty;
 use deno::*;
-use flatbuffers::FlatBufferBuilder;
 use log;
 use std::collections::HashMap;
 use std::env;
@@ -17,97 +13,38 @@ use url::Url;
 
 pub fn op_start(
   state: &ThreadSafeState,
-  base: &msg::Base<'_>,
-  data: Option<PinnedBuf>,
-) -> CliOpResult {
-  assert!(data.is_none());
-  let mut builder = FlatBufferBuilder::new();
-
-  let state = state;
-  let argv = state.argv.iter().map(String::as_str).collect::<Vec<_>>();
-  let argv_off = builder.create_vector_of_strings(argv.as_slice());
-
-  let cwd_path = env::current_dir().unwrap();
-  let cwd_off =
-    builder.create_string(deno_fs::normalize_path(cwd_path.as_ref()).as_ref());
-
-  let v8_version = version::v8();
-  let v8_version_off = builder.create_string(v8_version);
-
-  let deno_version = version::DENO;
-  let deno_version_off = builder.create_string(deno_version);
-
-  let main_module = state
-    .main_module()
-    .map(|m| builder.create_string(&m.to_string()));
-
-  let xeval_delim = state
-    .flags
-    .xeval_delim
-    .clone()
-    .map(|m| builder.create_string(&m));
-
-  let debug_flag = state
-    .flags
-    .log_level
-    .map_or(false, |l| l == log::Level::Debug);
-
-  let inner = msg::StartRes::create(
-    &mut builder,
-    &msg::StartResArgs {
-      cwd: Some(cwd_off),
-      pid: std::process::id(),
-      argv: Some(argv_off),
-      main_module,
-      debug_flag,
-      version_flag: state.flags.version,
-      v8_version: Some(v8_version_off),
-      deno_version: Some(deno_version_off),
-      no_color: !ansi::use_color(),
-      xeval_delim,
-      ..Default::default()
-    },
-  );
-
-  ok_buf(serialize_response(
-    base.cmd_id(),
-    &mut builder,
-    msg::BaseArgs {
-      inner_type: msg::Any::StartRes,
-      inner: Some(inner.as_union_value()),
-      ..Default::default()
-    },
-  ))
+  _args: Value,
+  _zero_copy: Option<PinnedBuf>,
+) -> Result<JsonOp, ErrBox> {
+  Ok(JsonOp::Sync(json!({
+    "cwd": deno_fs::normalize_path(&env::current_dir().unwrap()),
+    "pid": std::process::id(),
+    "argv": state.argv,
+    "mainModule": state.main_module().map(|x| x.as_str().to_string()),
+    "debugFlag": state
+      .flags
+      .log_level
+      .map_or(false, |l| l == log::Level::Debug),
+    "versionFlag": state.flags.version,
+    "v8Version": version::v8(),
+    "denoVersion": version::DENO,
+    "noColor": !ansi::use_color(),
+    "xevalDelim": state.flags.xeval_delim.clone(),
+  })))
 }
 
 pub fn op_home_dir(
   state: &ThreadSafeState,
-  base: &msg::Base<'_>,
-  data: Option<PinnedBuf>,
-) -> CliOpResult {
-  assert!(data.is_none());
-  let cmd_id = base.cmd_id();
-
+  _args: Value,
+  _zero_copy: Option<PinnedBuf>,
+) -> Result<JsonOp, ErrBox> {
   state.check_env()?;
-
-  let builder = &mut FlatBufferBuilder::new();
   let path = dirs::home_dir()
     .unwrap_or_default()
     .into_os_string()
     .into_string()
     .unwrap_or_default();
-  let path = Some(builder.create_string(&path));
-  let inner = msg::HomeDirRes::create(builder, &msg::HomeDirResArgs { path });
-
-  ok_buf(serialize_response(
-    cmd_id,
-    builder,
-    msg::BaseArgs {
-      inner: Some(inner.as_union_value()),
-      inner_type: msg::Any::HomeDirRes,
-      ..Default::default()
-    },
-  ))
+  Ok(JsonOp::Sync(json!(path)))
 }
 
 pub fn op_exec_path(
@@ -124,18 +61,21 @@ pub fn op_exec_path(
   Ok(JsonOp::Sync(json!(path)))
 }
 
+#[derive(Deserialize)]
+struct SetEnv {
+  key: String,
+  value: String,
+}
+
 pub fn op_set_env(
   state: &ThreadSafeState,
-  base: &msg::Base<'_>,
-  data: Option<PinnedBuf>,
-) -> CliOpResult {
-  assert!(data.is_none());
-  let inner = base.inner_as_set_env().unwrap();
-  let key = inner.key().unwrap();
-  let value = inner.value().unwrap();
+  args: Value,
+  _zero_copy: Option<PinnedBuf>,
+) -> Result<JsonOp, ErrBox> {
+  let args: SetEnv = serde_json::from_value(args)?;
   state.check_env()?;
-  env::set_var(key, value);
-  ok_buf(empty_buf())
+  env::set_var(args.key, args.value);
+  Ok(JsonOp::Sync(json!({})))
 }
 
 pub fn op_env(
diff --git a/js/dispatch.ts b/js/dispatch.ts
index 0c5c59553..d1da45b06 100644
--- a/js/dispatch.ts
+++ b/js/dispatch.ts
@@ -12,6 +12,9 @@ export const OP_IS_TTY = 4;
 export const OP_ENV = 5;
 export const OP_EXEC_PATH = 6;
 export const OP_UTIME = 7;
+export const OP_SET_ENV = 8;
+export const OP_HOME_DIR = 9;
+export const OP_START = 10;
 
 export function asyncMsgFromRust(opId: number, ui8: Uint8Array): void {
   switch (opId) {
diff --git a/js/main.ts b/js/main.ts
index 769f522a6..25e27b69f 100644
--- a/js/main.ts
+++ b/js/main.ts
@@ -22,12 +22,12 @@ export default function denoMain(
   preserveDenoNamespace: boolean = true,
   name?: string
 ): void {
-  const startResMsg = os.start(preserveDenoNamespace, name);
+  const s = os.start(preserveDenoNamespace, name);
 
-  setVersions(startResMsg.denoVersion()!, startResMsg.v8Version()!);
+  setVersions(s.denoVersion, s.v8Version);
 
   // handle `--version`
-  if (startResMsg.versionFlag()) {
+  if (s.versionFlag) {
     console.log("deno:", deno.version.deno);
     console.log("v8:", deno.version.v8);
     console.log("typescript:", deno.version.typescript);
@@ -36,24 +36,22 @@ export default function denoMain(
 
   setPrepareStackTrace(Error);
 
-  const mainModule = startResMsg.mainModule();
-  if (mainModule) {
-    assert(mainModule.length > 0);
-    setLocation(mainModule);
+  if (s.mainModule) {
+    assert(s.mainModule.length > 0);
+    setLocation(s.mainModule);
   }
 
-  const cwd = startResMsg.cwd();
-  log("cwd", cwd);
+  log("cwd", s.cwd);
 
-  for (let i = 1; i < startResMsg.argvLength(); i++) {
-    args.push(startResMsg.argv(i));
+  for (let i = 1; i < s.argv.length; i++) {
+    args.push(s.argv[i]);
   }
   log("args", args);
   Object.freeze(args);
 
   if (window["_xevalWrapper"] !== undefined) {
-    xevalMain(window["_xevalWrapper"] as XevalFunc, startResMsg.xevalDelim());
-  } else if (!mainModule) {
+    xevalMain(window["_xevalWrapper"] as XevalFunc, s.xevalDelim);
+  } else if (!s.mainModule) {
     replLoop();
   }
 }
diff --git a/js/os.ts b/js/os.ts
index f8938ab70..c44c27825 100644
--- a/js/os.ts
+++ b/js/os.ts
@@ -1,8 +1,7 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
 import { core } from "./core";
 import * as dispatch from "./dispatch";
-import { sendSync, msg, flatbuffers } from "./dispatch_flatbuffers";
-import * as dispatchJson from "./dispatch_json";
+import { sendSync } from "./dispatch_json";
 import { assert } from "./util";
 import * as util from "./util";
 import { window } from "./window";
@@ -24,21 +23,17 @@ function setGlobals(pid_: number, noColor_: boolean): void {
  *       console.log(Deno.isTTY().stdout);
  */
 export function isTTY(): { stdin: boolean; stdout: boolean; stderr: boolean } {
-  return dispatchJson.sendSync(dispatch.OP_IS_TTY);
+  return sendSync(dispatch.OP_IS_TTY);
 }
 
 /** Exit the Deno process with optional exit code. */
 export function exit(code = 0): never {
-  dispatchJson.sendSync(dispatch.OP_EXIT, { code });
+  sendSync(dispatch.OP_EXIT, { code });
   return util.unreachable();
 }
 
 function setEnv(key: string, value: string): void {
-  const builder = flatbuffers.createBuilder();
-  const key_ = builder.createString(key);
-  const value_ = builder.createString(value);
-  const inner = msg.SetEnv.createSetEnv(builder, key_, value_);
-  sendSync(builder, msg.Any.SetEnv, inner);
+  sendSync(dispatch.OP_SET_ENV, { key, value });
 }
 
 /** Returns a snapshot of the environment variables at invocation. Mutating a
@@ -53,7 +48,7 @@ function setEnv(key: string, value: string): void {
  *       console.log(myEnv.TEST_VAR == newEnv.TEST_VAR);
  */
 export function env(): { [index: string]: string } {
-  const env = dispatchJson.sendSync(dispatch.OP_ENV);
+  const env = sendSync(dispatch.OP_ENV);
   return new Proxy(env, {
     set(obj, prop: string, value: string): boolean {
       setEnv(prop, value);
@@ -62,35 +57,35 @@ export function env(): { [index: string]: string } {
   });
 }
 
-/** Send to the privileged side that we have setup and are ready. */
-function sendStart(): msg.StartRes {
-  const builder = flatbuffers.createBuilder();
-  const startOffset = msg.Start.createStart(builder, 0 /* unused */);
-  const baseRes = sendSync(builder, msg.Any.Start, startOffset);
-  assert(baseRes != null);
-  assert(msg.Any.StartRes === baseRes!.innerType());
-  const startResMsg = new msg.StartRes();
-  assert(baseRes!.inner(startResMsg) != null);
-  return startResMsg;
+interface Start {
+  cwd: string;
+  pid: number;
+  argv: string[];
+  mainModule: string; // Absolute URL.
+  debugFlag: boolean;
+  depsFlag: boolean;
+  typesFlag: boolean;
+  versionFlag: boolean;
+  denoVersion: string;
+  v8Version: string;
+  noColor: boolean;
+  xevalDelim: string;
 }
 
 // This function bootstraps an environment within Deno, it is shared both by
 // the runtime and the compiler environments.
 // @internal
-export function start(
-  preserveDenoNamespace = true,
-  source?: string
-): msg.StartRes {
+export function start(preserveDenoNamespace = true, source?: string): Start {
   core.setAsyncHandler(dispatch.asyncMsgFromRust);
 
   // First we send an empty `Start` message to let the privileged side know we
   // are ready. The response should be a `StartRes` message containing the CLI
   // args and other info.
-  const startResMsg = sendStart();
+  const s = sendSync(dispatch.OP_START);
 
-  util.setLogDebug(startResMsg.debugFlag(), source);
+  util.setLogDebug(s.debugFlag, source);
 
-  setGlobals(startResMsg.pid(), startResMsg.noColor());
+  setGlobals(s.pid, s.noColor);
 
   if (preserveDenoNamespace) {
     util.immutableDefine(window, "Deno", window.Deno);
@@ -105,7 +100,7 @@ export function start(
     assert(window.Deno === undefined);
   }
 
-  return startResMsg;
+  return s;
 }
 
 /**
@@ -113,18 +108,10 @@ export function start(
  * Requires the `--allow-env` flag.
  */
 export function homeDir(): string {
-  const builder = flatbuffers.createBuilder();
-  const inner = msg.HomeDir.createHomeDir(builder);
-  const baseRes = sendSync(builder, msg.Any.HomeDir, inner)!;
-  assert(msg.Any.HomeDirRes === baseRes.innerType());
-  const res = new msg.HomeDirRes();
-  assert(baseRes.inner(res) != null);
-  const path = res.path();
-
+  const path = sendSync(dispatch.OP_HOME_DIR);
   if (!path) {
     throw new Error("Could not get home directory.");
   }
-
   return path;
 }
 
@@ -133,5 +120,5 @@ export function homeDir(): string {
  * Requires the `--allow-env` flag.
  */
 export function execPath(): string {
-  return dispatchJson.sendSync(dispatch.OP_EXEC_PATH);
+  return sendSync(dispatch.OP_EXEC_PATH);
 }