BREAKING(io): remove `Deno.copy()` (#25345)

Towards #22079

---------

Signed-off-by: Asher Gomez <ashersaupingomez@gmail.com>

7 files changed, 0 insertions, 139 deletions

diff --git a/cli/tsc/dts/lib.deno.ns.d.ts b/cli/tsc/dts/lib.deno.ns.d.ts
index dd245b613..893dd7a5e 100644
--- a/cli/tsc/dts/lib.deno.ns.d.ts
+++ b/cli/tsc/dts/lib.deno.ns.d.ts
@@ -1833,27 +1833,6 @@ declare namespace Deno {
     seekSync(offset: number | bigint, whence: SeekMode): number;
   }
 
-  /**
-   * Copies from `src` to `dst` until either EOF (`null`) is read from `src` or
-   * an error occurs. It resolves to the number of bytes copied or rejects with
-   * the first error encountered while copying.
-   *
-   * @deprecated This will be removed in Deno 2.0. See the
-   * {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
-   * for migration instructions.
-   *
-   * @category I/O
-   *
-   * @param src The source to copy from
-   * @param dst The destination to copy to
-   * @param options Can be used to tune size of the buffer. Default size is 32kB
-   */
-  export function copy(
-    src: Reader,
-    dst: Writer,
-    options?: { bufSize?: number },
-  ): Promise<number>;
-
   /** Open a file and resolve to an instance of {@linkcode Deno.FsFile}. The
    * file does not need to previously exist if using the `create` or `createNew`
    * open options. The caller may have the resulting file automatically closed
diff --git a/ext/io/12_io.js b/ext/io/12_io.js
index 6e95a9bca..1caf6fe06 100644
--- a/ext/io/12_io.js
+++ b/ext/io/12_io.js
@@ -20,7 +20,6 @@ import {
   writableStreamForRid,
 } from "ext:deno_web/06_streams.js";
 
-const DEFAULT_BUFFER_SIZE = 32 * 1024;
 // Seek whence values.
 // https://golang.org/pkg/io/#pkg-constants
 const SeekMode = {
@@ -33,37 +32,6 @@ const SeekMode = {
   End: 2,
 };
 
-async function copy(
-  src,
-  dst,
-  options,
-) {
-  internals.warnOnDeprecatedApi(
-    "Deno.copy()",
-    new Error().stack,
-    "Use `copy()` from `https://jsr.io/@std/io/doc/copy/~` instead.",
-  );
-  let n = 0;
-  const bufSize = options?.bufSize ?? DEFAULT_BUFFER_SIZE;
-  const b = new Uint8Array(bufSize);
-  let gotEOF = false;
-  while (gotEOF === false) {
-    const result = await src.read(b);
-    if (result === null) {
-      gotEOF = true;
-    } else {
-      let nwritten = 0;
-      while (nwritten < result) {
-        nwritten += await dst.write(
-          TypedArrayPrototypeSubarray(b, nwritten, result),
-        );
-      }
-      n += nwritten;
-    }
-  }
-  return n;
-}
-
 function readSync(rid, buffer) {
   if (buffer.length === 0) return 0;
   const nread = core.readSync(rid, buffer);
@@ -295,7 +263,6 @@ const stdout = new Stdout();
 const stderr = new Stderr();
 
 export {
-  copy,
   read,
   readAll,
   readAllSync,
diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index 1854a73fa..174612851 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -801,7 +801,6 @@ function bootstrapMainRuntime(runtimeOptions, warmup = false) {
     if (future) {
       delete globalThis.window;
       delete Deno.Buffer;
-      delete Deno.copy;
       delete Deno.File;
       delete Deno.fstat;
       delete Deno.fstatSync;
@@ -979,7 +978,6 @@ function bootstrapWorkerRuntime(
 
     if (future) {
       delete Deno.Buffer;
-      delete Deno.copy;
       delete Deno.File;
       delete Deno.fstat;
       delete Deno.fstatSync;
diff --git a/tests/integration/js_unit_tests.rs b/tests/integration/js_unit_tests.rs
index 9f1ee7394..0baa114b4 100644
--- a/tests/integration/js_unit_tests.rs
+++ b/tests/integration/js_unit_tests.rs
@@ -47,7 +47,6 @@ util::unit_test_factory!(
     image_data_test,
     internals_test,
     intl_test,
-    io_test,
     jupyter_test,
     kv_test,
     kv_queue_test_no_db_close,
diff --git a/tests/specs/future/runtime_api/main.js b/tests/specs/future/runtime_api/main.js
index a12b2f1fc..ab53a809b 100644
--- a/tests/specs/future/runtime_api/main.js
+++ b/tests/specs/future/runtime_api/main.js
@@ -1,6 +1,5 @@
 console.log("window is", globalThis.window);
 console.log("Deno.Buffer is", Deno.Buffer);
-console.log("Deno.copy is", Deno.copy);
 console.log("Deno.File is", Deno.File);
 console.log("Deno.fstat is", Deno.fstat);
 console.log("Deno.fstatSync is", Deno.fstatSync);
diff --git a/tests/specs/future/runtime_api/main.out b/tests/specs/future/runtime_api/main.out
index 398922749..08b62ea3a 100644
--- a/tests/specs/future/runtime_api/main.out
+++ b/tests/specs/future/runtime_api/main.out
@@ -1,6 +1,5 @@
 window is undefined
 Deno.Buffer is undefined
-Deno.copy is undefined
 Deno.File is undefined
 Deno.fstat is undefined
 Deno.fstatSync is undefined
diff --git a/tests/unit/io_test.ts b/tests/unit/io_test.ts
deleted file mode 100644
index 44a04698c..000000000
--- a/tests/unit/io_test.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import { assertEquals, DENO_FUTURE } from "./test_util.ts";
-import { Buffer } from "@std/io/buffer";
-
-const DEFAULT_BUF_SIZE = 32 * 1024;
-
-type Spy = { calls: number };
-
-function repeat(c: string, bytes: number): Uint8Array {
-  assertEquals(c.length, 1);
-  const ui8 = new Uint8Array(bytes);
-  ui8.fill(c.charCodeAt(0));
-  return ui8;
-}
-
-function spyRead(obj: Buffer): Spy {
-  const spy: Spy = {
-    calls: 0,
-  };
-
-  const orig = obj.read.bind(obj);
-
-  obj.read = (p: Uint8Array): Promise<number | null> => {
-    spy.calls++;
-    return orig(p);
-  };
-
-  return spy;
-}
-
-Deno.test({ ignore: DENO_FUTURE }, async function copyWithDefaultBufferSize() {
-  const xBytes = repeat("b", DEFAULT_BUF_SIZE);
-  const reader = new Buffer(xBytes.buffer as ArrayBuffer);
-  const write = new Buffer();
-
-  const readSpy = spyRead(reader);
-
-  // deno-lint-ignore no-deprecated-deno-api
-  const n = await Deno.copy(reader, write);
-
-  assertEquals(n, xBytes.length);
-  assertEquals(write.length, xBytes.length);
-  assertEquals(readSpy.calls, 2); // read with DEFAULT_BUF_SIZE bytes + read with 0 bytes
-});
-
-Deno.test({ ignore: DENO_FUTURE }, async function copyWithCustomBufferSize() {
-  const bufSize = 1024;
-  const xBytes = repeat("b", DEFAULT_BUF_SIZE);
-  const reader = new Buffer(xBytes.buffer as ArrayBuffer);
-  const write = new Buffer();
-
-  const readSpy = spyRead(reader);
-
-  // deno-lint-ignore no-deprecated-deno-api
-  const n = await Deno.copy(reader, write, { bufSize });
-
-  assertEquals(n, xBytes.length);
-  assertEquals(write.length, xBytes.length);
-  assertEquals(readSpy.calls, DEFAULT_BUF_SIZE / bufSize + 1);
-});
-
-Deno.test(
-  { ignore: DENO_FUTURE, permissions: { write: true } },
-  async function copyBufferToFile() {
-    const filePath = "test-file.txt";
-    // bigger than max File possible buffer 16kb
-    const bufSize = 32 * 1024;
-    const xBytes = repeat("b", bufSize);
-    const reader = new Buffer(xBytes.buffer as ArrayBuffer);
-    const write = await Deno.open(filePath, { write: true, create: true });
-
-    // deno-lint-ignore no-deprecated-deno-api
-    const n = await Deno.copy(reader, write, { bufSize });
-
-    assertEquals(n, xBytes.length);
-
-    write.close();
-    await Deno.remove(filePath);
-  },
-);