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 wxy
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/**
* Copyright (c) 2014-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
var recast = require("recast");
var types = recast.types;
var n = types.namedTypes;
var util = require("./util.js");
exports.transform = function transform(node, options) {
options = util.defaults(options || {}, {
includeRuntime: false
});
var result = require("@babel/core").transformFromAstSync(node, null, {
presets: [require("regenerator-preset")],
code: false,
ast: true
});
node = result.ast;
if (options.includeRuntime === true) {
injectRuntime(n.File.check(node) ? node.program : node);
}
return node;
};
function injectRuntime(program) {
n.Program.assert(program);
// Include the runtime by modifying the AST rather than by concatenating
// strings. This technique will allow for more accurate source mapping.
var runtimePath = require("..").runtime.path;
var runtime = fs.readFileSync(runtimePath, "utf8");
var runtimeBody = recast.parse(runtime, {
sourceFileName: runtimePath
}).program.body;
var body = program.body;
body.unshift.apply(body, runtimeBody);
}
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