123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { colors, ensureDir } from "../deps.ts";import { versions } from "../versions.ts";import { pathExists } from "../helpers.ts";
export async function runNewCommand() {  await checkIfRequiredToolsExist();
  if (await pathExists("./rs_lib")) {    console.log(      `${        colors.bold(colors.red("Error"))      } cannot scaffold new project because the rs_lib folder already exists.`,    );    Deno.exit(1);  }
  console.log(    `${colors.bold(colors.green("Creating"))} rs_lib...`,  );
  if (!await pathExists("./Cargo.toml")) {    await Deno.writeTextFile(      "./Cargo.toml",      `[workspace]resolver = "2"members = [  "rs_lib",]
[profile.release]codegen-units = 1incremental = truelto = trueopt-level = "z"`,    );  }  if (!await pathExists("./.rustfmt.toml")) {    await Deno.writeTextFile(      "./.rustfmt.toml",      `max_width = 80tab_spaces = 2edition = "2021"`,    );  }
  let gitIgnoreText = await getFileTextIfExists("./.gitignore") ?? "";  if (!/^\/target$/m.test(gitIgnoreText)) {    gitIgnoreText = gitIgnoreText.trim();    if (gitIgnoreText.length > 0) {      gitIgnoreText = gitIgnoreText + "\n";    }    gitIgnoreText += "/target\n";    await Deno.writeTextFile("./.gitignore", gitIgnoreText);  }
  await ensureDir("./rs_lib/src");  await Deno.writeTextFile(    "./rs_lib/Cargo.toml",    `[package]name = "rs_lib"version = "0.0.0"edition = "2021"
[lib]crate_type = ["cdylib"]
[dependencies]wasm-bindgen = "=${versions.wasmBindgen}"`,  );  await Deno.writeTextFile(    "./rs_lib/src/lib.rs",    `use wasm_bindgen::prelude::*;
#[wasm_bindgen]pub fn add(a: i32, b: i32) -> i32 {  a + b}
#[wasm_bindgen]pub struct Greeter {  name: String,}
#[wasm_bindgen]impl Greeter {  #[wasm_bindgen(constructor)]  pub fn new(name: String) -> Self {    Self { name }  }
  pub fn greet(&self) -> String {    format!("Hello {}!", self.name)  }}
#[cfg(test)]mod tests {  use super::*;
  #[test]  fn it_adds() {    let result = add(1, 2);    assert_eq!(result, 3);  }
  #[test]  fn it_greets() {    let greeter = Greeter::new("world".into());    assert_eq!(greeter.greet(), "Hello world!");  }}`,  );  if (!await pathExists("./mod.js")) {    // use a .js file for the most compatibility out of the box (ex. browsers)    await Deno.writeTextFile(      "./mod.js",      `import { instantiate } from "./lib/rs_lib.generated.js";
const { Greeter, add } = await instantiate();
// addsconsole.log(add(1, 1));
// greetsconst greeter = new Greeter("world");console.log(greeter.greet());`,    );  }  console.log("%cTo get started run:", "color:yellow");  console.log("deno task wasmbuild");  console.log("deno run mod.js");}
async function getFileTextIfExists(path: string) {  try {    return await Deno.readTextFile(path);  } catch (err) {    if (err instanceof Deno.errors.NotFound) {      return undefined;    } else {      throw err;    }  }}
async function checkIfRequiredToolsExist() {  const requiredTools = ["deno", "cargo", "rustup"];  const notInstalled: string[] = [];
  for (const tool of requiredTools) {    try {      await new Deno.Command(tool, {        args: ["--version"], // the current needed tools all have this arg        stdout: "null",        stderr: "null",      })        .spawn()        .status;    } catch (e) {      if (e instanceof Deno.errors.NotFound) {        notInstalled.push(tool);      }    }  }
  if (notInstalled.length > 0) {    throw new Error(      "Some required tools are missing: " + notInstalled.join(", "),    );  }}