Add readFileSync

Makefile

@@ -1,4 +1,5 @@
 TS_FILES = \
+	deno.d.ts \
 	dispatch.ts \
 	fetch.ts \
 	globals.ts \

deno.d.ts

@@ -2,4 +2,6 @@ declare module "deno" {
   type MessageCallback = (msg: Uint8Array) => void;
   function sub(channel: string, cb: MessageCallback): void;
   function pub(channel: string, payload: Uint8Array): null | ArrayBuffer;
+
+  function readFileSync(filename: string): Uint8Array;
 }

msg.proto

@@ -19,6 +19,8 @@ message Msg {
     TIMER_CLEAR = 8;
     FETCH_REQ = 9;
     FETCH_RES = 10;
+    READ_FILE_SYNC = 11;
+    READ_FILE_SYNC_RES = 12;
   }
   Command command = 1;
 
@@ -81,4 +83,10 @@ message Msg {
   int32 fetch_res_status = 101;
   repeated string fetch_res_header_line = 102;
   bytes fetch_res_body = 103;
+
+  // READ_FILE_SYNC
+  string read_file_sync_filename = 110;
+
+  // READ_FILE_SYNC_RES
+  bytes read_file_sync_data = 120;
 }

os.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"github.com/golang/protobuf/proto"
+	"github.com/spf13/afero"
 	"io/ioutil"
 	"net/url"
 	"os"
@@ -11,7 +12,11 @@ import (
 
 const assetPrefix string = "/$asset$/"
 
+var fs afero.Fs
+
 func InitOS() {
+	fs = afero.NewOsFs()
+
 	Sub("os", func(buf []byte) []byte {
 		msg := &Msg{}
 		check(proto.Unmarshal(buf, msg))
@@ -27,6 +32,8 @@ func InitOS() {
 				msg.CodeCacheOutputCode)
 		case Msg_EXIT:
 			os.Exit(int(msg.ExitCode))
+		case Msg_READ_FILE_SYNC:
+			return ReadFileSync(msg.ReadFileSyncFilename)
 		default:
 			panic("[os] Unexpected message " + string(buf))
 		}
@@ -128,3 +135,18 @@ func HandleCodeCache(filename string, sourceCode string,
 	check(err)
 	return out
 }
+
+func ReadFileSync(filename string) []byte {
+	data, err := afero.ReadFile(fs, filename)
+	res := &Msg{
+		Command: Msg_READ_FILE_SYNC_RES,
+	}
+	if err != nil {
+		res.Error = err.Error()
+	} else {
+		res.ReadFileSyncData = data
+	}
+	out, err := proto.Marshal(res)
+	check(err)
+	return out
+}

os.ts

@@ -40,3 +40,11 @@ export function codeCache(
     codeCacheOutputCode: outputCode
   });
 }
+
+export function readFileSync(filename: string): Uint8Array {
+  const res = sendMsg("os", {
+    command: pb.Msg.Command.READ_FILE_SYNC,
+    readFileSyncFilename: filename
+  });
+  return res.readFileSyncData;
+}

runtime.ts

@@ -17,7 +17,11 @@ import { _global, globalEval } from "./globals";
 const EOL = "\n";
 
 // Public deno module.
-const deno = { pub, sub };
+const deno = {
+  pub,
+  sub,
+  readFileSync: os.readFileSync
+};
 
 // tslint:disable-next-line:no-any
 type AmdFactory = (...args: any[]) => undefined | object;

testdata/read_file_sync.ts

@@ -0,0 +1,14 @@
+import { readFileSync } from "deno";
+
+let data = readFileSync("package.json");
+if (!data.byteLength) {
+  throw Error(`Expected positive value for data.byteLength ${data.byteLength}`);
+}
+
+const decoder = new TextDecoder("utf-8");
+const json = decoder.decode(data);
+const pkg = JSON.parse(json);
+if (pkg.name !== "deno") {
+  throw Error(`Expected "deno" but got "${pkg.name}"`)
+}
+console.log("package.name ", pkg.name);

testdata/read_file_sync.ts.out

@@ -0,0 +1 @@
+package.name  deno