47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
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"use strict";
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const { parseSync, transformFromAstSync } = require("@babel/core");
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const nullthrows = require("nullthrows");
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function transform({ filename, options, plugins, src }) {
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const OLD_BABEL_ENV = process.env.BABEL_ENV;
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process.env.BABEL_ENV = options.dev
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? "development"
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: process.env.BABEL_ENV || "production";
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try {
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const babelConfig = {
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caller: {
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name: "metro",
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bundler: "metro",
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platform: options.platform,
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},
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ast: true,
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babelrc: options.enableBabelRCLookup,
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code: false,
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cwd: options.projectRoot,
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highlightCode: true,
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filename,
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plugins,
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sourceType: "module",
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cloneInputAst: false,
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};
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const sourceAst = options.hermesParser
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? require("hermes-parser").parse(src, {
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babel: true,
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sourceType: babelConfig.sourceType,
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})
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: parseSync(src, babelConfig);
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const transformResult = transformFromAstSync(sourceAst, src, babelConfig);
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return {
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ast: nullthrows(transformResult.ast),
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metadata: transformResult.metadata,
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};
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} finally {
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if (OLD_BABEL_ENV) {
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process.env.BABEL_ENV = OLD_BABEL_ENV;
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}
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}
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}
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module.exports = {
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transform,
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};
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