From 393abed3873d83019feb5bcebb10a6929133862a Mon Sep 17 00:00:00 2001
From: Leo Kettmeir <crowlkats@toaxl.com>
Date: Sat, 9 Dec 2023 01:19:16 +0100
Subject: feat: bring back WebGPU (#20812)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Leo Kettmeir <crowlkats@toaxl.com>
Co-authored-by: Kenta Moriuchi <moriken@kimamass.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
---
 tools/README.md    | 13 ++++++++
 tools/wgpu_sync.js | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 tools/wgpu_sync.js

(limited to 'tools')

diff --git a/tools/README.md b/tools/README.md
index f30e16b8f..012302733 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -31,6 +31,19 @@ executable
 cargo run -- run --allow-read --allow-write --allow-run --unstable ./tools/<script>
 ```
 
+## wgpu_sync.js
+
+`wgpu_sync.js` streamlines updating `deno_webgpu` from
+[gfx-rs/wgpu](https://github.com/gfx-rs/wgpu/).
+
+It essentially vendors the `deno_webgpu` tree with a few minor patches applied
+on top, somewhat similar to `git subtree`.
+
+1. Update `COMMIT` or `V_WGPU` in `./tools/wgpu_sync.js`
+2. Run `./tools/wgpu_sync.js`
+3. Double check changes, possibly patch
+4. Commit & send a PR with the updates
+
 ## copyright_checker.js
 
 `copyright_checker.js` is used to check copyright headers in the codebase.
diff --git a/tools/wgpu_sync.js b/tools/wgpu_sync.js
new file mode 100644
index 000000000..590324465
--- /dev/null
+++ b/tools/wgpu_sync.js
@@ -0,0 +1,92 @@
+#!/usr/bin/env -S deno run --unstable --allow-read --allow-write --allow-run
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { join, ROOT_PATH } from "./util.js";
+
+const COMMIT = "49b7ec97c164bac9ee877f45cdd806fbefecc5a4";
+const REPO = "gfx-rs/wgpu";
+const V_WGPU = "0.18";
+const TARGET_DIR = join(ROOT_PATH, "ext", "webgpu");
+
+async function bash(subcmd, opts = {}) {
+  const { success, code } = await new Deno.Command("bash", {
+    ...opts,
+    args: ["-c", subcmd],
+    stdout: "inherit",
+    sdterr: "inherit",
+  }).output();
+
+  // Exit process on failure
+  if (!success) {
+    Deno.exit(code);
+  }
+}
+
+async function clearTargetDir() {
+  await bash(`rm -r ${TARGET_DIR}/*`);
+}
+
+async function checkoutUpstream() {
+  // Path of deno_webgpu inside the TAR
+  const tarPrefix = `${REPO.replace("/", "-")}-${
+    COMMIT.slice(0, 7)
+  }/deno_webgpu/`;
+  const cmd =
+    `curl -L https://api.github.com/repos/${REPO}/tarball/${COMMIT} | tar -C '${TARGET_DIR}' -xzvf - --strip=2 '${tarPrefix}'`;
+  // console.log(cmd);
+  await bash(cmd);
+}
+
+async function denoWebgpuVersion() {
+  const coreCargo = join(ROOT_PATH, "Cargo.toml");
+  const contents = await Deno.readTextFile(coreCargo);
+  return contents.match(
+    /^deno_webgpu = { version = "(\d+\.\d+\.\d+)", path = ".\/ext\/webgpu" }$/m,
+  )[1];
+}
+
+async function patchFile(path, patcher) {
+  const data = await Deno.readTextFile(path);
+  const patched = patcher(data);
+  await Deno.writeTextFile(path, patched);
+}
+
+async function patchCargo() {
+  const vDenoWebgpu = await denoWebgpuVersion();
+  await patchFile(
+    join(TARGET_DIR, "Cargo.toml"),
+    (data) =>
+      data
+        .replace(/^version = .*/m, `version = "${vDenoWebgpu}"`)
+        .replace(
+          /^repository.workspace = true/m,
+          `repository = "https://github.com/gfx-rs/wgpu"`,
+        )
+        .replace(
+          /^serde = { workspace = true, features = ["derive"] }/m,
+          `serde.workspace = true`,
+        )
+        .replace(
+          /^tokio = { workspace = true, features = ["full"] }/m,
+          `tokio.workspace = true`,
+        ),
+  );
+
+  await patchFile(
+    join(ROOT_PATH, "Cargo.toml"),
+    (data) =>
+      data
+        .replace(/^wgpu-core = .*/m, `wgpu-core = "${V_WGPU}"`)
+        .replace(/^wgpu-types = .*/m, `wgpu-types = "${V_WGPU}"`)
+        .replace(/^wgpu-hal = .*/m, `wgpu-hal = "${V_WGPU}"`),
+  );
+}
+
+async function main() {
+  await clearTargetDir();
+  await checkoutUpstream();
+  await patchCargo();
+  await bash(join(ROOT_PATH, "tools", "format.js"));
+}
+
+await main();
-- 
cgit v1.2.3