127 lines
3.2 KiB
JavaScript
127 lines
3.2 KiB
JavaScript
var natives = process.binding('natives')
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var module = require('module')
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var normalRequire = require
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exports.source = src
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exports.require = req
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var vm = require('vm')
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// fallback for 0.x support
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var runInThisContext, ContextifyScript, Script
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/*istanbul ignore next*/
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try {
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ContextifyScript = process.binding('contextify').ContextifyScript;
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runInThisContext = function runInThisContext(code, options) {
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var script = new ContextifyScript(code, options);
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return script.runInThisContext();
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}
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} catch (er) {
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Script = process.binding('evals').NodeScript;
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runInThisContext = Script.runInThisContext;
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}
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var wrap = [
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'(function (exports, require, module, __filename, __dirname) { ',
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'\n});'
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];
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// Basically the same functionality as node's (buried deep)
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// NativeModule class, but without caching, or internal/ blocking,
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// or a class, since that's not really necessary. I assume that if
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// you're loading something with this module, it's because you WANT
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// a separate copy. However, to preserve semantics, any require()
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// calls made throughout the internal module load IS cached.
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function req (id, whitelist) {
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var cache = Object.create(null)
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if (Array.isArray(whitelist)) {
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// a whitelist of things to pull from the "actual" native modules
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whitelist.forEach(function (id) {
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cache[id] = {
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loading: false,
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loaded: true,
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filename: id + '.js',
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exports: require(id)
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}
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})
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}
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return req_(id, cache)
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}
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function req_ (id, cache) {
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// Buffer is special, because it's a type rather than a "normal"
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// class, and many things depend on `Buffer.isBuffer` working.
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if (id === 'buffer') {
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return require('buffer')
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}
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// native_module isn't actually a natives binding.
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// weird, right?
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if (id === 'native_module') {
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return {
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getSource: src,
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wrap: function (script) {
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return wrap[0] + script + wrap[1]
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},
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wrapper: wrap,
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_cache: cache
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}
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}
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var source = src(id)
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if (!source) {
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return undefined
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}
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source = wrap[0] + source + wrap[1]
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var cachingRequire = function require (id) {
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if (cache[id]) {
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return cache[id].exports
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}
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return req_(id, cache)
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}
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var nm = {
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exports: {},
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loading: true,
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loaded: false,
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filename: id + '.js'
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}
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cache[id] = nm
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var fn
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var setV8Flags = false
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try {
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require('v8').setFlagsFromString('--allow_natives_syntax')
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setV8Flags = true
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} catch (e) {}
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try {
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/* istanbul ignore else */
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if (ContextifyScript) {
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fn = runInThisContext(source, {
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filename: nm.filename,
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lineOffset: 0,
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displayErrors: true
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});
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} else {
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fn = runInThisContext(source, nm.filename, true);
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}
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fn(nm.exports, cachingRequire, nm, nm.filename)
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nm.loaded = true
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} finally {
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nm.loading = false
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if (setV8Flags) {
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// Ref: https://github.com/nodejs/node/blob/591a24b819d53a555463b1cbf9290a6d8bcc1bcb/lib/internal/bootstrap_node.js#L429-L434
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var re = /^--allow[-_]natives[-_]syntax$/
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if (!process.execArgv.some(function (s) { return re.test(s) }))
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require('v8').setFlagsFromString('--noallow_natives_syntax')
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}
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}
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return nm.exports
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}
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function src (id) {
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return natives[id]
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}
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