db2a9fc96e
Previously, if the optional `opts` parameter wasn't passed, the _intent_ was to move the function it held into the `callback` parameter and null out the `opts` param - but instead, it was nulling both.
68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
// @flow
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import loadConfig, { type InputOptions } from "./config";
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import {
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runSync,
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runAsync,
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type FileResult,
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type FileResultCallback,
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} from "./transformation";
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type Transform = {
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(code: string, callback: FileResultCallback): void,
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(code: string, opts: ?InputOptions, callback: FileResultCallback): void,
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// Here for backward-compatibility. Ideally use ".transformSync" if you want
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// a synchronous API.
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(code: string, opts: ?InputOptions): FileResult | null,
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};
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export const transform: Transform = (function transform(code, opts, callback) {
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if (typeof opts === "function") {
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callback = opts;
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opts = undefined;
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}
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// For backward-compat with Babel 6, we allow sync transformation when
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// no callback is given. Will be dropped in some future Babel major version.
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if (callback === undefined) return transformSync(code, opts);
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// Reassign to keep Flowtype happy.
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const cb = callback;
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// Just delaying the transform one tick for now to simulate async behavior
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// but more async logic may land here eventually.
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process.nextTick(() => {
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let cfg;
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try {
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cfg = loadConfig(opts);
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if (cfg === null) return cb(null, null);
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} catch (err) {
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return cb(err);
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}
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runAsync(cfg, code, null, cb);
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});
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}: Function);
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export function transformSync(
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code: string,
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opts: ?InputOptions,
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): FileResult | null {
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const config = loadConfig(opts);
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if (config === null) return null;
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return runSync(config, code);
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}
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export function transformAsync(
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code: string,
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opts: ?InputOptions,
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): Promise<FileResult | null> {
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return new Promise((res, rej) => {
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transform(code, opts, (err, result) => {
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if (err == null) res(result);
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else rej(err);
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});
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});
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}
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