func NewStubServer()

in helpers/ssh/stub_ssh_server.go [86:143]
48 lines of code
10 McCabe index (conditional complexity)

func NewStubServer(user, pass string, opts ...Option) (server *StubSSHServer, err error) {
	tempDir, err := os.MkdirTemp("", "ssh-stub-server")
	if err != nil {
		return nil, err
	}

	var options Options
	for _, opt := range opts {
		opt(&options)
	}

	server = &StubSSHServer{
		Options:  options,
		User:     user,
		Password: pass,
		Config: &ssh.ServerConfig{
			PasswordCallback: func(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
				if conn.User() == user && string(password) == pass {
					return nil, nil
				}
				return nil, fmt.Errorf("wrong password for %q", conn.User())
			},
		},
		stopped: make(chan struct{}),
		tempDir: tempDir,
	}

	privateKeyLocation := filepath.Join(tempDir, "id_rsa_test")
	publicKeyLocation := filepath.Join(tempDir, "id_rsa_test.pub")

	defer func() {
		if err != nil {
			os.RemoveAll(tempDir)
		}
	}()

	if err := os.WriteFile(privateKeyLocation, []byte(TestSSHKeyPair.PrivateKey), 0o600); err != nil {
		return nil, err
	}

	if err := os.WriteFile(publicKeyLocation, []byte(TestSSHKeyPair.PublicKey), 0o600); err != nil {
		return nil, err
	}

	key, err := ssh.ParsePrivateKey([]byte(TestSSHKeyPair.PrivateKey))
	if err != nil {
		return nil, err
	}

	server.privateKeyLocation = privateKeyLocation
	server.Config.AddHostKey(key)

	if err := server.start(); err != nil {
		return nil, err
	}

	return server, nil
}