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207 lines (190 loc) · 5.64 KB
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import { Module } from "node:module";
import { performance } from "node:perf_hooks";
import vm from "node:vm";
import { dirname, basename, extname } from "pathe";
import { hasESMSyntax } from "mlly";
import {
debug,
jitiInteropDefault,
readNearestPackageJSON,
wrapModule,
} from "./utils";
import type { ModuleCache, Context, EvalModuleOptions } from "./types";
import { jitiResolve } from "./resolve";
import { jitiRequire, nativeImportOrRequire } from "./require";
import createJiti from "./jiti";
import { transform } from "./transform";
export function evalModule(
ctx: Context,
source: string,
evalOptions: EvalModuleOptions = {},
): any {
// Resolve options
const id =
evalOptions.id ||
(evalOptions.filename
? basename(evalOptions.filename)
: `_jitiEval.${evalOptions.ext || (evalOptions.async ? "mjs" : "js")}`);
const filename =
evalOptions.filename || jitiResolve(ctx, id, { async: evalOptions.async });
const ext = evalOptions.ext || extname(filename);
const cache = (evalOptions.cache || ctx.parentCache || {}) as ModuleCache;
// Transpile
const isTypescript = /\.[cm]?tsx?$/.test(ext);
const isESM =
ext === ".mjs" ||
(ext === ".js" && readNearestPackageJSON(filename)?.type === "module");
const isCommonJS = ext === ".cjs";
const needsTranspile =
evalOptions.forceTranspile ??
(!isCommonJS && // CommonJS skips transpile
!(isESM && evalOptions.async) && // In async mode, we can skip native ESM as well
// prettier-ignore
(isTypescript || isESM || ctx.isTransformRe.test(filename) || hasESMSyntax(source)));
const start = performance.now();
if (needsTranspile) {
source = transform(ctx, {
filename,
source,
ts: isTypescript,
async: evalOptions.async ?? false,
jsx: ctx.opts.jsx,
});
const time = Math.round((performance.now() - start) * 1000) / 1000;
debug(
ctx,
"[transpile]",
evalOptions.async ? "[esm]" : "[cjs]",
filename,
`(${time}ms)`,
);
} else {
debug(
ctx,
"[native]",
evalOptions.async ? "[import]" : "[require]",
filename,
);
if (evalOptions.async) {
return Promise.resolve(
nativeImportOrRequire(ctx, filename, evalOptions.async),
).catch((error: any) => {
debug(ctx, "Native import error:", error);
debug(ctx, "[fallback]", filename);
return evalModule(ctx, source, {
...evalOptions,
forceTranspile: true,
});
});
} else {
try {
return nativeImportOrRequire(ctx, filename, evalOptions.async);
} catch (error: any) {
debug(ctx, "Native require error:", error);
debug(ctx, "[fallback]", filename);
source = transform(ctx, {
filename,
source,
ts: isTypescript,
async: evalOptions.async ?? false,
jsx: ctx.opts.jsx,
});
}
}
}
// Compile module
const mod = new Module(filename);
mod.filename = filename;
if (ctx.parentModule) {
mod.parent = ctx.parentModule;
if (
Array.isArray(ctx.parentModule.children) &&
!ctx.parentModule.children.includes(mod)
) {
ctx.parentModule.children.push(mod);
}
}
const _jiti = createJiti(
filename,
ctx.opts,
{
parentModule: mod,
parentCache: cache,
nativeImport: ctx.nativeImport,
onError: ctx.onError,
createRequire: ctx.createRequire,
},
true /* isNested */,
);
mod.require = _jiti as typeof mod.require;
mod.path = dirname(filename);
// @ts-ignore
mod.paths = Module._nodeModulePaths(mod.path);
// Set CJS cache before eval
cache[filename] = mod as ModuleCache[string];
if (ctx.opts.moduleCache) {
ctx.nativeRequire.cache[filename] = mod;
}
// Compile wrapped script
let compiled;
const wrapped = wrapModule(source, { async: evalOptions.async });
try {
compiled = vm.runInThisContext(wrapped, {
filename,
lineOffset: 0,
displayErrors: false,
});
} catch (error: any) {
if (error.name === "SyntaxError" && evalOptions.async && ctx.nativeImport) {
// Support cases such as import.meta.[custom]
debug(ctx, "[esm]", "[import]", "[fallback]", filename);
compiled = esmEval(wrapped, ctx.nativeImport!);
} else {
if (ctx.opts.moduleCache) {
delete ctx.nativeRequire.cache[filename];
}
ctx.onError!(error);
}
}
// Evaluate module
let evalResult;
try {
evalResult = compiled(
mod.exports,
mod.require,
mod,
mod.filename,
dirname(mod.filename),
_jiti.import,
_jiti.esmResolve,
);
} catch (error: any) {
if (ctx.opts.moduleCache) {
delete ctx.nativeRequire.cache[filename];
}
ctx.onError!(error);
}
function next() {
// Check for parse errors
if (mod.exports && mod.exports.__JITI_ERROR__) {
const { filename, line, column, code, message } =
mod.exports.__JITI_ERROR__;
const loc = `${filename}:${line}:${column}`;
const err = new Error(`${code}: ${message} \n ${loc}`);
Error.captureStackTrace(err, jitiRequire);
ctx.onError!(err);
}
// Set as loaded
mod.loaded = true;
// interopDefault
const _exports = jitiInteropDefault(ctx, mod.exports);
// Return exports
return _exports;
}
return evalOptions.async ? Promise.resolve(evalResult).then(next) : next();
}
function esmEval(code: string, nativeImport: (id: string) => Promise<any>) {
const uri = `data:text/javascript;base64,${Buffer.from(`export default ${code}`).toString("base64")}`;
return (...args: any[]) =>
nativeImport(uri).then((mod) => mod.default(...args));
}