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39d905e293
Make the builtin libraries available for the `--eval` and
`--print` CLI options, using the same mechanism that the
REPL uses.
This renders workarounds like `node -e 'require("fs").doStuff()'`
unnecessary.
As part of this, the list of builtin modules and the code for
adding the corresponding properties to the target context is moved
to `internal/module.js`, and the previously missing `repl` entry
is added.
PR-URL: https://github.com/nodejs/node/pull/6207
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
82 lines
2.1 KiB
JavaScript
82 lines
2.1 KiB
JavaScript
'use strict';
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exports = module.exports = {
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makeRequireFunction,
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stripBOM,
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addBuiltinLibsToObject
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};
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exports.requireDepth = 0;
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// Invoke with makeRequireFunction.call(module) where |module| is the
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// Module object to use as the context for the require() function.
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function makeRequireFunction() {
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const Module = this.constructor;
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const self = this;
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function require(path) {
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try {
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exports.requireDepth += 1;
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return self.require(path);
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} finally {
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exports.requireDepth -= 1;
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}
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}
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function resolve(request) {
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return Module._resolveFilename(request, self);
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}
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require.resolve = resolve;
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require.main = process.mainModule;
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// Enable support to add extra extension types.
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require.extensions = Module._extensions;
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require.cache = Module._cache;
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return require;
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}
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/**
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* Remove byte order marker. This catches EF BB BF (the UTF-8 BOM)
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* because the buffer-to-string conversion in `fs.readFileSync()`
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* translates it to FEFF, the UTF-16 BOM.
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*/
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function stripBOM(content) {
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if (content.charCodeAt(0) === 0xFEFF) {
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content = content.slice(1);
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}
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return content;
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}
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exports.builtinLibs = ['assert', 'buffer', 'child_process', 'cluster',
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'crypto', 'dgram', 'dns', 'domain', 'events', 'fs', 'http', 'https', 'net',
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'os', 'path', 'punycode', 'querystring', 'readline', 'repl', 'stream',
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'string_decoder', 'tls', 'tty', 'url', 'util', 'v8', 'vm', 'zlib'];
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function addBuiltinLibsToObject(object) {
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// Make built-in modules available directly (loaded lazily).
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exports.builtinLibs.forEach((name) => {
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Object.defineProperty(object, name, {
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get: () => {
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const lib = require(name);
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// This implicitly invokes the setter, so that this getter is only
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// invoked at most once and does not overwrite anything.
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object[name] = lib;
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return lib;
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},
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// Allow the creation of other globals with this name.
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set: (val) => {
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// Deleting the property before re-assigning it disables the
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// getter/setter mechanism.
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delete object[name];
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object[name] = val;
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},
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configurable: true,
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enumerable: false
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});
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});
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}
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