feat(ext/node): embed std/node into the snapshot (#17724)

This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/ext/node/polyfills/_process/process.ts b/ext/node/polyfills/_process/process.ts
new file mode 100644
index 000000000..7ba44e431
--- /dev/null
+++ b/ext/node/polyfills/_process/process.ts
@@ -0,0 +1,129 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.
+
+// The following are all the process APIs that don't depend on the stream module
+// They have to be split this way to prevent a circular dependency
+
+import { build } from "internal:runtime/js/01_build.js";
+import { nextTick as _nextTick } from "internal:deno_node/polyfills/_next_tick.ts";
+import { _exiting } from "internal:deno_node/polyfills/_process/exiting.ts";
+
+/** Returns the operating system CPU architecture for which the Deno binary was compiled */
+export function arch(): string {
+  if (build.arch == "x86_64") {
+    return "x64";
+  } else if (build.arch == "aarch64") {
+    return "arm64";
+  } else {
+    throw Error("unreachable");
+  }
+}
+
+/** https://nodejs.org/api/process.html#process_process_chdir_directory */
+export const chdir = Deno.chdir;
+
+/** https://nodejs.org/api/process.html#process_process_cwd */
+export const cwd = Deno.cwd;
+
+/** https://nodejs.org/api/process.html#process_process_nexttick_callback_args */
+export const nextTick = _nextTick;
+
+/** Wrapper of Deno.env.get, which doesn't throw type error when
+ * the env name has "=" or "\0" in it. */
+function denoEnvGet(name: string) {
+  const perm =
+    Deno.permissions.querySync?.({ name: "env", variable: name }).state ??
+      "granted"; // for Deno Deploy
+  // Returns undefined if the env permission is unavailable
+  if (perm !== "granted") {
+    return undefined;
+  }
+  try {
+    return Deno.env.get(name);
+  } catch (e) {
+    if (e instanceof TypeError) {
+      return undefined;
+    }
+    throw e;
+  }
+}
+
+const OBJECT_PROTO_PROP_NAMES = Object.getOwnPropertyNames(Object.prototype);
+/**
+ * https://nodejs.org/api/process.html#process_process_env
+ * Requires env permissions
+ */
+export const env: InstanceType<ObjectConstructor> & Record<string, string> =
+  new Proxy(Object(), {
+    get: (target, prop) => {
+      if (typeof prop === "symbol") {
+        return target[prop];
+      }
+
+      const envValue = denoEnvGet(prop);
+
+      if (envValue) {
+        return envValue;
+      }
+
+      if (OBJECT_PROTO_PROP_NAMES.includes(prop)) {
+        return target[prop];
+      }
+
+      return envValue;
+    },
+    ownKeys: () => Reflect.ownKeys(Deno.env.toObject()),
+    getOwnPropertyDescriptor: (_target, name) => {
+      const value = denoEnvGet(String(name));
+      if (value) {
+        return {
+          enumerable: true,
+          configurable: true,
+          value,
+        };
+      }
+    },
+    set(_target, prop, value) {
+      Deno.env.set(String(prop), String(value));
+      return true; // success
+    },
+    has: (_target, prop) => typeof denoEnvGet(String(prop)) === "string",
+  });
+
+/**
+ * https://nodejs.org/api/process.html#process_process_version
+ *
+ * This value is hard coded to latest stable release of Node, as
+ * some packages are checking it for compatibility. Previously
+ * it pointed to Deno version, but that led to incompability
+ * with some packages.
+ */
+export const version = "v18.12.1";
+
+/**
+ * https://nodejs.org/api/process.html#process_process_versions
+ *
+ * This value is hard coded to latest stable release of Node, as
+ * some packages are checking it for compatibility. Previously
+ * it contained only output of `Deno.version`, but that led to incompability
+ * with some packages. Value of `v8` field is still taken from `Deno.version`.
+ */
+export const versions = {
+  node: "18.12.1",
+  uv: "1.43.0",
+  zlib: "1.2.11",
+  brotli: "1.0.9",
+  ares: "1.18.1",
+  modules: "108",
+  nghttp2: "1.47.0",
+  napi: "8",
+  llhttp: "6.0.10",
+  openssl: "3.0.7+quic",
+  cldr: "41.0",
+  icu: "71.1",
+  tz: "2022b",
+  unicode: "14.0",
+  ngtcp2: "0.8.1",
+  nghttp3: "0.7.0",
+  ...Deno.version,
+};