52 lines
1.8 KiB
JavaScript
52 lines
1.8 KiB
JavaScript
|
const {ArrayPrototypeForEach, StringPrototypeStartsWith, ObjectPrototypeHasOwnProperty, StringPrototypeIncludes, ObjectDefineProperty} = require('./node-primordials');
|
||
|
|
|
||
|
|
exports.addBuiltinLibsToObject = addBuiltinLibsToObject;
|
||
|
|
|
||
|
|
// Copied from https://github.com/nodejs/node/blob/21f5a56914a3b24ad77535ef369b93c6b1c11d18/lib/internal/modules/cjs/helpers.js#L133-L178
|
||
|
|
function addBuiltinLibsToObject(object) {
|
||
|
|
// Make built-in modules available directly (loaded lazily).
|
||
|
|
const { builtinModules } = require('module').Module;
|
||
|
|
ArrayPrototypeForEach(builtinModules, (name) => {
|
||
|
|
// Neither add underscored modules, nor ones that contain slashes (e.g.,
|
||
|
|
// 'fs/promises') or ones that are already defined.
|
||
|
|
if (StringPrototypeStartsWith(name, '_') ||
|
||
|
|
StringPrototypeIncludes(name, '/') ||
|
||
|
|
ObjectPrototypeHasOwnProperty(object, name)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// Goals of this mechanism are:
|
||
|
|
// - Lazy loading of built-in modules
|
||
|
|
// - Having all built-in modules available as non-enumerable properties
|
||
|
|
// - Allowing the user to re-assign these variables as if there were no
|
||
|
|
// pre-existing globals with the same name.
|
||
|
|
|
||
|
|
const setReal = (val) => {
|
||
|
|
// Deleting the property before re-assigning it disables the
|
||
|
|
// getter/setter mechanism.
|
||
|
|
delete object[name];
|
||
|
|
object[name] = val;
|
||
|
|
};
|
||
|
|
|
||
|
|
ObjectDefineProperty(object, name, {
|
||
|
|
get: () => {
|
||
|
|
const lib = require(name);
|
||
|
|
|
||
|
|
// Disable the current getter/setter and set up a new
|
||
|
|
// non-enumerable property.
|
||
|
|
delete object[name];
|
||
|
|
ObjectDefineProperty(object, name, {
|
||
|
|
get: () => lib,
|
||
|
|
set: setReal,
|
||
|
|
configurable: true,
|
||
|
|
enumerable: false
|
||
|
|
});
|
||
|
|
|
||
|
|
return lib;
|
||
|
|
},
|
||
|
|
set: setReal,
|
||
|
|
configurable: true,
|
||
|
|
enumerable: false
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|