feat: docker compose maybe

node_modules/sorcery/src/utils/getMapFromUrl.js

@@ -0,0 +1,44 @@
+import { dirname, resolve } from 'path';
+import { readFile, readFileSync, Promise } from 'sander';
+import atob from './atob.js';
+import SOURCEMAPPING_URL from './sourceMappingURL.js';
+
+function parseJSON ( json, url ) {
+	try {
+		return JSON.parse( json );
+	} catch ( err ) {
+		throw new Error( `Could not parse sourcemap (${url}): ${err.message}` );
+	}
+}
+
+/**
+ * Turns a sourceMappingURL into a sourcemap
+ * @param {string} url - the sourceMappingURL. Can be a
+   base64-encoded data URI
+ * @param {string} base - the URL against which relative URLS
+   should be resolved
+ * @param {boolean} sync - if `true`, return a promise, otherwise
+   return the sourcemap
+ * @returns {object} - a version 3 sourcemap
+ */
+export default function getMapFromUrl ( url, base, sync ) {
+	if ( /^data:/.test( url ) ) { // TODO beef this up
+		const match = /base64,(.+)$/.exec( url );
+
+		if ( !match ) {
+			throw new Error( `${SOURCEMAPPING_URL} is not base64-encoded` );
+		}
+
+		const json = atob( match[1] );
+		const map = parseJSON( json, `data URI in ${base}` );
+		return sync ? map : Promise.resolve( map );
+	}
+
+	url = resolve( dirname( base ), decodeURI( url ) );
+
+	if ( sync ) {
+		return parseJSON( readFileSync( url, { encoding: 'utf-8' }), url );
+	} else {
+		return readFile( url, { encoding: 'utf-8' }).then( json => parseJSON( json, url ) );
+	}
+}