public InstalledRbEnv detect()

in rake-runner-agent/src/jetbrains/buildServer/agent/ruby/rbenv/detector/RbEnvDetectorForUNIX.java [25:52]

• 20 lines of code
• 8 McCabe index (conditional complexity)

  public InstalledRbEnv detect(@NotNull final Map<String, String> env) {
    // 1. Read "RBENV_ROOT" env variable
    // 2. Try to find local rbenv (RBENV_ROOT = $HOME/.rbenv)
    // 3. Try to find global rbenv (RBENV_ROOT = /usr/local/.rbenv)
    // NOTE: Steps 2 and 3 via 'which rbenv'
    // custom or system wide rbenv path

    @Nullable final String special = determinePathUsingEnvVariable(env);
    @Nullable final String global = determineGlobalInstallation(env);
    @Nullable final String local = determineLocalInstallation();

    if (special != null) {
      if (local != null && special.equals(local)) {
        return new InstalledRbEnv(local, InstalledRbEnv.Type.Local);
      } else if (global != null && special.equals(global)) {
        return new InstalledRbEnv(global, InstalledRbEnv.Type.Global);
      } else {
        return new InstalledRbEnv(special, InstalledRbEnv.Type.Special);
      }
    } else if (local != null) {
      return new InstalledRbEnv(local, InstalledRbEnv.Type.Local);
    } else if (global != null) {
      return new InstalledRbEnv(global, InstalledRbEnv.Type.Global);
    } else {
      // Nothing founded
      return null;
    }
  }