/
module-types.ts
129 lines (119 loc) 路 3.73 KB
/
module-types.ts
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import { isAsync, waitFor } from "../../gensync-utils/async";
import type { Handler } from "gensync";
import path from "path";
import { pathToFileURL } from "url";
import { createRequire } from "module";
import fs from "fs";
import semver from "semver";
import { endHiddenCallStack } from "../../errors/rewrite-stack-trace";
import ConfigError from "../../errors/config-error";
import { transformSync } from "../../transform";
import type { InputOptions } from "..";
const require = createRequire(import.meta.url);
let import_: ((specifier: string | URL) => any) | undefined;
try {
// Old Node.js versions don't support import() syntax.
import_ = require("./import.cjs");
} catch {}
export const supportsESM = semver.satisfies(
process.versions.node,
// older versions, starting from 10, support the dynamic
// import syntax but always return a rejected promise.
"^12.17 || >=13.2",
);
export default function* loadCodeDefault(
filepath: string,
asyncError: string,
// TODO(Babel 8): Remove this
fallbackToTranspiledModule: boolean = false,
): Handler<unknown> {
switch (path.extname(filepath)) {
case ".cjs":
return loadCjsDefault(filepath, fallbackToTranspiledModule);
case ".mjs":
break;
case ".cts":
return loadCtsDefault(filepath);
default:
try {
return loadCjsDefault(filepath, fallbackToTranspiledModule);
} catch (e) {
if (e.code !== "ERR_REQUIRE_ESM") throw e;
}
}
if (yield* isAsync()) {
return yield* waitFor(loadMjsDefault(filepath));
}
throw new ConfigError(asyncError, filepath);
}
function loadCtsDefault(filepath: string) {
const ext = ".cts";
const hasTsSupport = !!(
require.extensions[".ts"] ||
require.extensions[".cts"] ||
require.extensions[".mts"]
);
if (!hasTsSupport) {
const code = fs.readFileSync(filepath, "utf8");
const opts: InputOptions = {
babelrc: false,
configFile: false,
filename: path.basename(filepath),
sourceType: "script",
sourceMaps: "inline",
presets: [
[
"@babel/preset-typescript",
process.env.BABEL_8_BREAKING
? {
disallowAmbiguousJSXLike: true,
allExtensions: true,
onlyRemoveTypeImports: true,
optimizeConstEnums: true,
}
: {
allowDeclareFields: true,
disallowAmbiguousJSXLike: true,
allExtensions: true,
onlyRemoveTypeImports: true,
optimizeConstEnums: true,
},
],
],
};
const result = transformSync(code, opts);
require.extensions[ext] = function (m, filename) {
if (filename === filepath) {
// @ts-expect-error Undocumented API
return m._compile(result.code, filename);
}
return require.extensions[".js"](m, filename);
};
}
try {
return endHiddenCallStack(require)(filepath);
} finally {
if (!hasTsSupport) {
delete require.extensions[ext];
}
}
}
function loadCjsDefault(filepath: string, fallbackToTranspiledModule: boolean) {
const module = endHiddenCallStack(require)(filepath);
return module?.__esModule
? // TODO (Babel 8): Remove "module" and "undefined" fallback
module.default || (fallbackToTranspiledModule ? module : undefined)
: module;
}
async function loadMjsDefault(filepath: string) {
if (!import_) {
throw new ConfigError(
"Internal error: Native ECMAScript modules aren't supported by this platform.\n",
filepath,
);
}
// import() expects URLs, not file paths.
// https://github.com/nodejs/node/issues/31710
const module = await endHiddenCallStack(import_)(pathToFileURL(filepath));
return module.default;
}