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#!/usr/bin/env -S deno run --allow-all// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import * as base64 from "../../encoding/base64.ts";
const home = Deno.env.get("HOME");const root = new URL(".", import.meta.url).pathname;
if (new URL(import.meta.url).protocol === "file:") {  // Run in the same directory as this script is located.  Deno.chdir(root);} else {  console.error("build.ts can only be run locally (from a file: URL).");  Deno.exit(1);}
// 1. Build WASM from Rust.const cargoStatus = await Deno.run({  cmd: [    "cargo",    "build",    "--release",    "--target",    "wasm32-unknown-unknown",  ],  env: {    // eliminate some potential sources of non-determinism    SOURCE_DATE_EPOCH: "1600000000",    TZ: "UTC",    LC_ALL: "C",    RUSTFLAGS: `--remap-path-prefix=${root}=. --remap-path-prefix=${home}=~`,  },}).status();
if (!cargoStatus.success) {  console.error(`Failed to build wasm: ${cargoStatus.code}`);  Deno.exit(1);}
// 2. Generated JavaScript bindings for WASM.const bindgenStatus = await Deno.run({  cmd: [    "wasm-bindgen",    "./target/wasm32-unknown-unknown/release/deno_hash.wasm",    "--target",    "deno",    "--weak-refs",    "--out-dir",    "./out/",  ],}).status();
if (!bindgenStatus.success) {  console.error(`Failed to generated wasm bindings: ${bindgenStatus.code}`);  Deno.exit(1);}
const generatedScript = await Deno.readTextFile("./out/deno_hash.js");const generatedWasm = await Deno.readFile("./out/deno_hash_bg.wasm");
// Replace the lines loading the WASM from an external file with our inlined// copy, to avoid the need for net or read permissions.const inlinedScript = `\  // deno-lint-ignore-file  import * as base64 from "../../encoding/base64.ts"; ${  generatedScript.replace(    /^const file =.*?;\nconst wasmFile =.*?;\nconst wasmModule =.*?;\n/sm,    `      const wasmModule = new WebAssembly.Module(base64.decode("${      base64.encode(generatedWasm).replace(/.{78}/g, "$&\\\n")    }"));`,  )}
  // only exposed for testing  export const _wasm = wasm;`;
await Deno.writeFile("wasm.js", new TextEncoder().encode(inlinedScript));
// 4. Format generated code.const fmtStatus = await Deno.run({  cmd: [    "deno",    "fmt",    "wasm.js",  ],}).status();
if (!fmtStatus.success) {  console.error(`Failed to format generated code: ${fmtStatus.code}`);  Deno.exit(1);}