7825d9247c
Summary: Adds support for optional chaining to the codebase, enables flow and eslint support for it. Reviewed By: passy Differential Revision: D9940732 fbshipit-source-id: 730aa76653bd22a8fa17a73e72b3a7329de0226c
75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
/**
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* Copyright 2018-present Facebook.
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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* @format
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*/
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const generate = require('@babel/generator').default;
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const babylon = require('@babel/parser');
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const babel = require('@babel/core');
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const metro = require('metro');
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exports.transform = function({filename, options, src}) {
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const presets = [require('../node_modules/@babel/preset-react')];
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const isPlugin = !__dirname.startsWith(options.projectRoot);
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let ast = babylon.parse(src, {
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filename,
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plugins: [
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'jsx',
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'flow',
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'classProperties',
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'objectRestSpread',
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'optionalChaining',
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],
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sourceType: 'module',
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});
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// run babel
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const plugins = [
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require('../node_modules/@babel/plugin-transform-modules-commonjs'),
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require('../node_modules/@babel/plugin-proposal-object-rest-spread'),
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require('../node_modules/@babel/plugin-proposal-class-properties'),
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require('../node_modules/@babel/plugin-transform-flow-strip-types'),
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require('../node_modules/@babel/plugin-proposal-optional-chaining'),
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require('./electron-requires.js'),
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require('./fb-stubs.js'),
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require('./dynamic-requires.js'),
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];
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if (isPlugin) {
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plugins.push(require('./flipper-requires.js'));
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} else {
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plugins.push(require('./import-react.js'));
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}
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ast = babel.transformFromAst(ast, src, {
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ast: true,
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babelrc: !filename.includes('node_modules'),
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code: false,
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comments: false,
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compact: false,
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filename,
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plugins,
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presets,
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sourceMaps: true,
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}).ast;
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const result = generate(
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ast,
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{
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filename,
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sourceFileName: filename,
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sourceMaps: true,
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},
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src,
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);
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return {
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ast,
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code: result.code,
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filename,
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map: result.rawMappings.map(metro.sourceMaps.compactMapping),
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};
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};
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