Future resolveDependencies()

in lib/src/package_context.dart [61:108]
36 lines of code
11 McCabe index (conditional complexity)

  Future<PkgResolution?> resolveDependencies() async {
    if (_pkgResolution != null) return _pkgResolution;
    final upgrade = await toolEnvironment.runUpgrade(packageDir, usesFlutter);

    if (upgrade.exitCode == 0) {
      try {
        _pkgResolution = createPkgResolution(pubspec, upgrade.asJoinedOutput,
            path: packageDir);
      } catch (e, stack) {
        log.severe('Problem with `dart pub upgrade`', e, stack);
        //(TODO)kevmoo - should add a helper that handles logging exceptions
        //  and writing to issues in one go.

        // Note: calling `flutter pub pub` ensures we get the raw `pub` output.
        final cmd = usesFlutter ? 'flutter pub upgrade' : 'dart pub upgrade';
        errors.add('Running `$cmd` failed with the following output:\n\n'
            '```\n$e\n```\n');
      }
    } else {
      String message;
      if (upgrade.exitCode > 0) {
        message = PubEntry.parse(upgrade.stderr as String)
            .where((e) => e.header == 'ERR')
            .join('\n');
      } else {
        message = LineSplitter.split(upgrade.stderr as String).first;
      }

      // 1: Version constraint issue with direct or transitive dependencies.
      //
      // 2: Code in a git repository could change or disappear.
      final isUserProblem = message.contains('version solving failed') || // 1
          pubspec.hasGitDependency || // 2
          message.contains('Git error.'); // 2

      if (!isUserProblem) {
        log.severe('`dart pub upgrade` failed.\n$message'.trim());
      }

      // Note: calling `flutter pub pub` ensures we get the raw `pub` output.
      final cmd = usesFlutter ? 'flutter pub upgrade' : 'dart pub upgrade';
      errors.add(message.isEmpty
          ? 'Running `$cmd` failed.'
          : 'Running `$cmd` failed with the following output:\n\n'
              '```\n$message\n```\n');
    }
    return _pkgResolution;
  }