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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { BuildCommand } from "../args.ts";import { colors, emptyDir, ensureDir, path } from "../deps.ts";import { runPreBuild } from "../pre_build.ts";import { runWasmOpt } from "../wasmopt.ts";
export async function runBuildCommand(args: BuildCommand) {  const output = await runPreBuild(args);
  await ensureDir(args.outDir);  await writeSnippets();
  console.log(`  write ${colors.yellow(output.bindingJsPath)}`);  await Deno.writeTextFile(output.bindingJsPath, output.bindingJsText);
  if (output.wasmFileName != null) {    const wasmDest = path.join(args.outDir, output.wasmFileName);    await Deno.writeFile(wasmDest, new Uint8Array(output.bindgen.wasmBytes));    if (args.isOpt) {      await optimizeWasmFile(wasmDest);    }  }
  console.log(    `${colors.bold(colors.green("Finished"))} WebAssembly output`,  );
  async function optimizeWasmFile(wasmFilePath: string) {    try {      console.log(        `${colors.bold(colors.green("Optimizing"))} .wasm file...`,      );      await runWasmOpt(wasmFilePath);    } catch (err) {      console.error(        `${colors.bold(colors.red("Error"))} ` +          `running wasm-opt failed. Maybe skip with --skip-opt?\n\n${err}`,      );      Deno.exit(1);    }  }
  async function writeSnippets() {    const localModules = Object.entries(output.bindgen.localModules);    const snippets = Object.entries(output.bindgen.snippets);
    if (localModules.length === 0 && !snippets.some((s) => s[1].length > 0)) {      return; // don't create the snippets directory    }
    const snippetsDest = path.join(args.outDir, "snippets");    // start with a fresh directory in order to clear out any previously    // created snippets which might have a different name    await emptyDir(snippetsDest);
    for (const [name, text] of localModules) {      const filePath = path.join(snippetsDest, name);      const dirPath = path.dirname(filePath);      await Deno.mkdir(dirPath, { recursive: true });      await Deno.writeTextFile(filePath, text);    }
    for (const [identifier, list] of snippets) {      if (list.length === 0) {        continue;      }      const dirPath = path.join(snippetsDest, identifier);      await Deno.mkdir(dirPath, { recursive: true });      for (const [i, text] of list.entries()) {        const name = `inline${i}.js`;        const filePath = path.join(dirPath, name);        await Deno.writeTextFile(filePath, text);      }    }  }}