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node.js
executable file
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node.js
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/* @flow */
import deepClone from "lodash/lang/cloneDeep";
import sourceMapSupport from "source-map-support";
import * as registerCache from "./cache";
import extend from "lodash/object/extend";
import * as babel from "babel-core";
import each from "lodash/collection/each";
import { util, OptionManager } from "babel-core";
import fs from "fs";
import path from "path";
sourceMapSupport.install({
handleUncaughtExceptions: false,
retrieveSourceMap(source) {
let map = maps && maps[source];
if (map) {
return {
url: null,
map: map
};
} else {
return null;
}
}
});
registerCache.load();
let cache = registerCache.get();
let transformOpts = {};
let ignore;
let only;
let oldHandlers = {};
let maps = {};
let cwd = process.cwd();
function getRelativePath(filename){
return path.relative(cwd, filename);
}
function mtime(filename) {
return +fs.statSync(filename).mtime;
}
function compile(filename) {
let result;
let optsManager = new OptionManager;
// merge in base options and resolve all the plugins and presets relative to this file
optsManager.mergeOptions(deepClone(transformOpts), "base", null, path.dirname(filename));
let opts = optsManager.init({ filename });
let cacheKey = `${JSON.stringify(opts)}:${babel.version}`;
let env = process.env.BABEL_ENV || process.env.NODE_ENV;
if (env) cacheKey += `:${env}`;
if (cache) {
let cached = cache[cacheKey];
if (cached && cached.mtime === mtime(filename)) {
result = cached;
}
}
if (!result) {
result = babel.transformFileSync(filename, extend(opts, {
// Do not process config files since has already been done with the OptionManager
// calls above and would introduce duplicates.
babelrc: false,
sourceMap: "both",
ast: false
}));
}
if (cache) {
cache[cacheKey] = result;
result.mtime = mtime(filename);
}
maps[filename] = result.map;
return result.code;
}
function shouldIgnore(filename) {
if (!ignore && !only) {
return getRelativePath(filename).split(path.sep).indexOf("node_modules") >= 0;
} else {
return util.shouldIgnore(filename, ignore || [], only);
}
}
function loader(m, filename) {
m._compile(compile(filename), filename);
}
function registerExtension(ext) {
let old = oldHandlers[ext] || oldHandlers[".js"] || require.extensions[".js"];
require.extensions[ext] = function (m, filename) {
if (shouldIgnore(filename)) {
old(m, filename);
} else {
loader(m, filename, old);
}
};
}
function hookExtensions(_exts) {
each(oldHandlers, function (old, ext) {
if (old === undefined) {
delete require.extensions[ext];
} else {
require.extensions[ext] = old;
}
});
oldHandlers = {};
each(_exts, function (ext) {
oldHandlers[ext] = require.extensions[ext];
registerExtension(ext);
});
}
hookExtensions(util.canCompile.EXTENSIONS);
export default function (opts?: Object = {}) {
if (opts.only != null) only = util.arrayify(opts.only, util.regexify);
if (opts.ignore != null) ignore = util.arrayify(opts.ignore, util.regexify);
if (opts.extensions) hookExtensions(util.arrayify(opts.extensions));
if (opts.cache === false) cache = null;
delete opts.extensions;
delete opts.ignore;
delete opts.cache;
delete opts.only;
extend(transformOpts, opts);
}