fix(std/io): remove trivial internal util.ts module (#8032)

std/io/bufio_test.ts

@@ -17,7 +17,6 @@ import {
 import * as iotest from "./_iotest.ts";
 import { StringReader } from "./readers.ts";
 import { StringWriter } from "./writers.ts";
-import { charCode } from "./util.ts";
 import { copyBytes } from "../bytes/mod.ts";
 
 const encoder = new TextEncoder();
@@ -140,7 +139,7 @@ Deno.test("bufioBufferFull", async function (): Promise<void> {
   const decoder = new TextDecoder();
 
   try {
-    await buf.readSlice(charCode("!"));
+    await buf.readSlice("!".charCodeAt(0));
     fail("readSlice should throw");
   } catch (err) {
     assert(err instanceof BufferFullError);
@@ -148,7 +147,7 @@ Deno.test("bufioBufferFull", async function (): Promise<void> {
     assertEquals(decoder.decode(err.partial), "And now, hello, ");
   }
 
-  const line = await buf.readSlice(charCode("!"));
+  const line = await buf.readSlice("!".charCodeAt(0));
   assert(line !== null);
   const actual = decoder.decode(line);
   assertEquals(actual, "world!");
@@ -332,7 +331,7 @@ Deno.test("bufioWriter", async function (): Promise<void> {
 
   for (let i = 0; i < data.byteLength; i++) {
     // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
-    data[i] = charCode(" ") + (i % (charCode("~") - charCode(" ")));
+    data[i] = " ".charCodeAt(0) + (i % ("~".charCodeAt(0) - " ".charCodeAt(0)));
   }
 
   const w = new Deno.Buffer();
@@ -366,7 +365,7 @@ Deno.test("bufioWriterSync", function (): void {
 
   for (let i = 0; i < data.byteLength; i++) {
     // eslint-disable-next-line @typescript-eslint/restrict-plus-operands
-    data[i] = charCode(" ") + (i % (charCode("~") - charCode(" ")));
+    data[i] = " ".charCodeAt(0) + (i % ("~".charCodeAt(0) - " ".charCodeAt(0)));
   }
 
   const w = new Deno.Buffer();

std/io/util.ts

@@ -1,30 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-import * as path from "../path/mod.ts";
-
-export function charCode(s: string): number {
-  return s.charCodeAt(0);
-}
-
-/** Create or open a temporal file at specified directory with prefix and
- *  postfix
- * */
-export async function tempFile(
-  dir: string,
-  opts: {
-    prefix?: string;
-    postfix?: string;
-  } = { prefix: "", postfix: "" },
-): Promise<{ file: Deno.File; filepath: string }> {
-  const r = Math.floor(Math.random() * 1000000);
-  const filepath = path.resolve(
-    `${dir}/${opts.prefix || ""}${r}${opts.postfix || ""}`,
-  );
-  await Deno.mkdir(path.dirname(filepath), { recursive: true });
-  const file = await Deno.open(filepath, {
-    create: true,
-    read: true,
-    write: true,
-    append: true,
-  });
-  return { file, filepath };
-}

std/io/util_test.ts

@@ -1,18 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-import { assert } from "../testing/asserts.ts";
-import * as path from "../path/mod.ts";
-import { tempFile } from "./util.ts";
-
-Deno.test({
-  name: "[io/util] tempfile",
-  fn: async function (): Promise<void> {
-    const f = await tempFile(".", {
-      prefix: "prefix-",
-      postfix: "-postfix",
-    });
-    const base = path.basename(f.filepath);
-    assert(!!base.match(/^prefix-.+?-postfix$/));
-    f.file.close();
-    await Deno.remove(f.filepath);
-  },
-});

std/mime/multipart.ts

@@ -3,7 +3,6 @@ import { equal, findIndex, findLastIndex, hasPrefix } from "../bytes/mod.ts";
 import { copyN } from "../io/ioutil.ts";
 import { MultiReader } from "../io/readers.ts";
 import { extname } from "../path/mod.ts";
-import { tempFile } from "../io/util.ts";
 import { BufReader, BufWriter } from "../io/bufio.ts";
 import { encoder } from "../encoding/utf8.ts";
 import { assert } from "../_util/assert.ts";
@@ -310,10 +309,14 @@ export class MultipartReader {
       if (n > maxMemory) {
         // too big, write to disk and flush buffer
         const ext = extname(p.fileName);
-        const { file, filepath } = await tempFile(".", {
+        const filepath = await Deno.makeTempFile({
+          dir: ".",
           prefix: "multipart-",
-          postfix: ext,
+          suffix: ext,
         });
+
+        const file = await Deno.open(filepath, { write: true });
+
         try {
           const size = await Deno.copy(new MultiReader(buf, p), file);