String? resolve()

in lib/src/resolver.dart [23:77]
48 lines of code
9 McCabe index (conditional complexity)

  String? resolve(String scriptUri) {
    final uri = Uri.parse(scriptUri);
    if (uri.scheme == 'dart') {
      final sdkRoot = this.sdkRoot;
      if (sdkRoot == null) {
        // No sdk-root given, do not resolve dart: URIs.
        return null;
      }
      String filePath;
      if (uri.pathSegments.length > 1) {
        var path = uri.pathSegments[0];
        // Drop patch files, since we don't have their source in the compiled
        // SDK.
        if (path.endsWith('-patch')) {
          failed.add('$uri');
          return null;
        }
        // Canonicalize path. For instance: _collection-dev => _collection_dev.
        path = path.replaceAll('-', '_');
        final pathSegments = [
          sdkRoot,
          path,
          ...uri.pathSegments.sublist(1),
        ];
        filePath = p.joinAll(pathSegments);
      } else {
        // Resolve 'dart:something' to be something/something.dart in the SDK.
        final lib = uri.path;
        filePath = p.join(sdkRoot, lib, '$lib.dart');
      }
      return resolveSymbolicLinks(filePath);
    }
    if (uri.scheme == 'package') {
      final _packages = this._packages;
      if (_packages == null) {
        return null;
      }

      final packageName = uri.pathSegments[0];
      final packageUri = _packages[packageName];
      if (packageUri == null) {
        failed.add('$uri');
        return null;
      }
      final packagePath = p.fromUri(packageUri);
      final pathInPackage = p.joinAll(uri.pathSegments.sublist(1));
      return resolveSymbolicLinks(p.join(packagePath, pathInPackage));
    }
    if (uri.scheme == 'file') {
      return resolveSymbolicLinks(p.fromUri(uri));
    }
    // We cannot deal with anything else.
    failed.add('$uri');
    return null;
  }