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MonirAbuHilal/extract-sourcemap.js

Created August 23, 2018 00:35
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A nodejs script for extracting source files from a sourcemap (.js.map) file
Raw
extract-sourcemap.js
// yarn init .
// yarn add mkdirp
// node ./extract-sourcemap.js ./app-bundle.js.map
const fs = require("fs");
const path = require("path");
const mkdirp = require("mkdirp");
const OUTPUT_DIRECTORY = "./extracted/";
const args = process.argv.slice(2);
const sourceMapFilePath = args[0];
const parsedSourceMap = JSON.parse(fs.readFileSync(sourceMapFilePath, "utf8"));
const sources = parsedSourceMap.sources;
const contents = parsedSourceMap.sourcesContent;
for (let index = 0; index < sources.length; index++) {
const fileName = sources[index];
const fileContents = contents[index];
console.log(fileName);
const filePath = `${OUTPUT_DIRECTORY}${fileName}`;
const fileDirectory = path.dirname(filePath);
mkdirp.sync(fileDirectory);
fs.writeFileSync(filePath, fileContents);
}
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