code: function buildRelativePath(from, to) {
      from = core_1.normalize(from);
      to = core_1.normalize(to);
      // Convert to arrays.
      const fromParts = from.split('/');
      const toParts = to.split('/');
      // Remove file names (preserving destination)
      fromParts.pop();
      const toFileName = toParts.pop();
      const relativePath = core_1.relative(core_1.normalize(fromParts.join('/')), core_1.normalize(toParts.join('/')));
      let pathPrefix = '';
      // Set the path prefix for same dir or child dir, parent dir starts with `..`
      if (!relativePath) {
          pathPrefix = '.';
      }
      else if (!relativePath.startsWith('.')) {
          pathPrefix = `./`;
      }
      if (pathPrefix && !pathPrefix.endsWith('/')) {
          pathPrefix += '/';
      }
      return pathPrefix + (relativePath ? relativePath + '/' : '') + toFileName;
  }
docs: Build a relative path from one file path to another file path.