resolve.ts - mozsearch

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import resolveUri from '@jridgewell/resolve-uri';

import stripFilename from './strip-filename';

type Resolve = (source: string | null) => string;

export default function resolver(

  mapUrl: string | null | undefined,

  sourceRoot: string | undefined,

): Resolve {

  const from = stripFilename(mapUrl);

  // The sourceRoot is always treated as a directory, if it's not empty.

  // https://github.com/mozilla/source-map/blob/8cb3ee57/lib/util.js#L327

  // https://github.com/chromium/chromium/blob/da4adbb3/third_party/blink/renderer/devtools/front_end/sdk/SourceMap.js#L400-L401

  const prefix = sourceRoot ? sourceRoot + '/' : '';

  return (source) => resolveUri(prefix + (source || ''), from);