33 lines
731 B
JavaScript
33 lines
731 B
JavaScript
// @flow
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import fs from "fs";
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import loadConfig from "./config";
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import runTransform, { type FileResult } from "./transformation";
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export default function transformFile(
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filename: string,
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opts?: Object = {},
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callback: (?Error, FileResult | null) => void,
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) {
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if (typeof opts === "function") {
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callback = opts;
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opts = {};
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}
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opts.filename = filename;
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const config = loadConfig(opts);
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if (config === null) return callback(null, null);
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fs.readFile(filename, "utf8", function(err, code: string) {
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if (err) return callback(err, null);
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let result;
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try {
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result = runTransform(config, code);
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} catch (_err) {
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return callback(_err, null);
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}
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callback(null, result);
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});
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}
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