public void checkVersion()

in java/com/google/devtools/bazel/e4b/command/BazelCommand.java [92:122]
31 lines of code
10 McCabe index (conditional complexity)

  public void checkVersion(String bazel) throws BazelNotFoundException {
    File path = new File(bazel);
    if (!path.exists() || !path.canExecute()) {
      throw new BazelNotFoundException.BazelNotExecutableException();
    }
    try {
      Command command = Command.builder(consoleFactory).setConsoleName(null)
          .setDirectory(aspectLocation.getWorkspaceDirectory()).addArguments(bazel, "version")
          .setStdoutLineSelector((s) -> s.startsWith("Build label:") ? s.substring(13) : null)
          .build();
      if (command.run() != 0) {
        throw new BazelNotFoundException.BazelNotExecutableException();
      }
      List<String> result = command.getSelectedOutputLines();
      if (result.size() != 1) {
        throw new BazelNotFoundException.BazelTooOldException("unknown");
      }
      String version = result.get(0);
      Matcher versionMatcher = VERSION_PATTERN.matcher(version);
      if (versionMatcher == null || !versionMatcher.matches()) {
        throw new BazelNotFoundException.BazelTooOldException(version);
      }
      int[] versionNumbers = {Integer.parseInt(versionMatcher.group(1)),
          Integer.parseInt(versionMatcher.group(2)), Integer.parseInt(versionMatcher.group(3))};
      if (compareVersion(versionNumbers, MINIMUM_BAZEL_VERSION) < 0) {
        throw new BazelNotFoundException.BazelTooOldException(version);
      }
    } catch (IOException | InterruptedException e) {
      throw new BazelNotFoundException.BazelNotExecutableException();
    }
  }