Function getOutputPathFn

packages/localize/tools/src/translate/output_path.ts:25–44

(fs: PathManipulation, outputFolder: AbsoluteFsPath)

 * @param outputFolder An absolute path to the folder containing this set of translations.
 */
export function getOutputPathFn(fs: PathManipulation, outputFolder: AbsoluteFsPath): OutputPathFn {
  const [pre, post] = outputFolder.split('{{LOCALE}}');
  return post === undefined
    ? (_locale, relativePath) => fs.join(pre, relativePath)
    : (locale, relativePath) => {
        if (/[\/\\]|\.\./.test(locale)) {
          throw new Error(`Invalid Locale: '${locale}' is not a valid locale.`);
        }

        const outputPath = fs.join(pre + locale + post, relativePath);
        const resolvedOutputPath = fs.resolve(outputPath);
        const resolvedPre = fs.resolve(pre);

        if (!resolvedOutputPath.startsWith(resolvedPre)) {
          throw new Error(`Invalid Locale: '${locale}' would cause path traversal.`);
        }

        return outputPath;
      };
}