109 lines
2.3 KiB
JavaScript
109 lines
2.3 KiB
JavaScript
"use strict";
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require("./polyfill");
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var sourceMapSupport = require("source-map-support");
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var registerCache = require("./register-cache");
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var util = require("./util");
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var to5 = require("./index");
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var fs = require("fs");
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var extend = require("lodash/object/extend");
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var each = require("lodash/collection/each");
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sourceMapSupport.install({
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retrieveSourceMap: function (source) {
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var map = maps && maps[source];
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if (map) {
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return {
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url: null,
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map: map
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};
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} else {
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return null;
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}
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}
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});
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//
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registerCache.load();
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var cache = registerCache.get();
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//
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var transformOpts = {};
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var ignoreRegex = /node_modules/;
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var onlyRegex;
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var whitelist = [];
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var exts = {};
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var maps = {};
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var old = require.extensions[".js"];
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var mtime = function (filename) {
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return +fs.statSync(filename).mtime;
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};
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var loader = function (m, filename) {
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if ((ignoreRegex && ignoreRegex.test(filename)) || (onlyRegex && !onlyRegex.test(filename))) {
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return old.apply(this, arguments);
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}
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var result;
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if (cache) {
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var cached = cache[filename];
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if (cached && cached.mtime === mtime(filename)) {
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result = cached;
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}
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}
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result = result || to5.transformFileSync(filename, extend({
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whitelist: whitelist,
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sourceMap: true,
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ast: false
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}, transformOpts));
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if (cache) {
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result.mtime = mtime(filename);
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cache[filename] = result;
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}
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maps[filename] = result.map;
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m._compile(result.code, filename);
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};
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var hookExtensions = function (_exts) {
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each(exts, function (old, ext) {
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require.extensions[ext] = old;
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});
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exts = {};
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each(_exts, function (ext) {
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exts[ext] = require.extensions[ext];
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require.extensions[ext] = loader;
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});
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};
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hookExtensions(util.canCompile.EXTENSIONS);
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module.exports = function (opts) {
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// normalise options
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opts = opts || {};
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if (opts.only != null) onlyRegex = util.regexify(opts.only);
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if (opts.ignore != null) ignoreRegex = util.regexify(opts.ignore);
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if (opts.extensions) hookExtensions(util.arrayify(opts.extensions));
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if (opts.cache === false) cache = null;
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delete opts.extensions;
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delete opts.ignore;
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delete opts.cache;
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delete opts.only;
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extend(transformOpts, opts);
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};
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