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index.js
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index.js
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var stream = require("stream");
var babel = require("@babel/core");
var util = require("util");
var path = require("path")
module.exports = Babelify;
util.inherits(Babelify, stream.Transform);
function Babelify(filename, opts) {
if (!(this instanceof Babelify)) {
return Babelify.configure(opts)(filename);
}
stream.Transform.call(this);
this._data = "";
this._filename = filename;
this._opts = Object.assign({filename: filename}, opts);
}
Babelify.prototype._transform = function (buf, enc, callback) {
this._data += buf;
callback();
};
Babelify.prototype._flush = function (callback) {
babel.transform(this._data, this._opts, (err, result) => {
if (err) {
this.emit("error", err);
} else {
this.emit("babelify", result, this._filename);
var code = result.code;
this.push(code);
callback();
}
});
};
Babelify.configure = function (opts) {
opts = Object.assign({}, opts);
var extensions = opts.extensions || babel.DEFAULT_EXTENSIONS;
var sourceMapsAbsolute = opts.sourceMapsAbsolute;
if (opts.sourceMaps !== false) opts.sourceMaps = "inline";
// babelify specific options
delete opts.sourceMapsAbsolute;
delete opts.extensions;
delete opts.filename;
// babelify backwards-compat
delete opts.sourceMapRelative;
// browserify specific options
delete opts._flags;
delete opts.basedir;
delete opts.global;
// browserify cli options
delete opts._;
// "--opt [ a b ]" and "--opt a --opt b" are allowed:
if (opts.ignore && opts.ignore._) opts.ignore = opts.ignore._;
if (opts.only && opts.only._) opts.only = opts.only._;
if (opts.plugins && opts.plugins._) opts.plugins = opts.plugins._;
if (opts.presets && opts.presets._) opts.presets = opts.presets._;
return function (filename, topts) {
var extname = path.extname(filename);
if (extensions.indexOf(extname) === -1) {
return stream.PassThrough();
}
var _opts = sourceMapsAbsolute
? Object.assign({sourceFileName: filename}, opts)
: opts;
if (topts && topts._flags && topts._flags.basedir) _opts.cwd = topts._flags.basedir;
return new Babelify(filename, _opts);
};
};