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import { ensureDir } from "https://deno.land/std@0.136.0/fs/ensure_dir.ts";import { dirname, join } from "https://deno.land/std@0.136.0/path/mod.ts";import { VERSION } from "./version.ts";import init, {  parseDeps as parseDepsWasmFn,  parseExportNames as parseExportNamesWasmFn,  transform as transformWasmFn,  transformCSS as parcelCSS,} from "./dist/compiler.js";import decodeWasmData from "./dist/wasm.js";import {  DependencyDescriptor,  TransformCSSOptions,  TransformCSSResult,  TransformOptions,  TransformResult,} from "./types.ts";
let wasmReady: Promise<void> | boolean = false;
async function checkWasmReady() {  if (wasmReady === false) {    wasmReady = initWasm();  }  if (wasmReady instanceof Promise) {    await wasmReady;    wasmReady = true;  }}
/* check whether or not the given path exists as regular file. */async function existsFile(path: string): Promise<boolean> {  try {    const stat = await Deno.lstat(path);    return stat.isFile;  } catch (err) {    if (err instanceof Deno.errors.NotFound) {      return false;    }    throw err;  }}
/* initialize the compiler wasm module. */async function initWasm() {  const mcDir = Deno.env.get("MODULES_CACHE_DIR");  if (mcDir) {    const cacheDir = join(mcDir, `https/deno.land/x/aleph_compiler/dist`);    const cachePath = `${cacheDir}/aleph_compiler.${VERSION}.wasm`;    if (await existsFile(cachePath)) {      const wasmData = await Deno.readFile(cachePath);      await init(wasmData);    } else {      const wasmData = decodeWasmData();      await init(wasmData);      await ensureDir(dirname(cachePath));      await Deno.writeFile(cachePath, wasmData);    }  } else {    const wasmData = decodeWasmData();    await init(wasmData);  }}
/** Parse export names of the module. */export async function parseExportNames(  specifier: string,  code: string,): Promise<string[]> {  await checkWasmReady();  return parseExportNamesWasmFn(specifier, code);}
/** Parse the deps of the modules. */export async function parseDeps(  specifier: string,  code: string,  options: Pick<TransformOptions, "importMap" | "lang"> = {},): Promise<DependencyDescriptor[]> {  await checkWasmReady();  return parseDepsWasmFn(specifier, code, options);}
/** * Transforms the JSX/TS module into a JS module. * * ```tsx * transform( *   '/app.tsx', *   ` *    import React from 'https://esm.sh/react'; * *    export default App() { *      return <h1>Hello world!</h1> *    } *   ` * ) * ``` */export async function transform(  specifier: string,  code: string,  options: TransformOptions = {},): Promise<TransformResult> {  await checkWasmReady();  return transformWasmFn(specifier, code, options);}
/** * Compiles a CSS file, including optionally minifying and lowering syntax to the given * targets. A source map may also be generated, but this is not enabled by default. */export async function transformCSS(  specifier: string,  code: string,  options: TransformCSSOptions = {},): Promise<TransformCSSResult> {  await checkWasmReady();  return parcelCSS(specifier, code, options);}