Expect-elixir

Tiny TCL/Expect-ish interface for the excellent Porcelain library.

See the API documentation.

Installation

If available in Hex, the package can be installed as:

1. Add expect_ex to your list of dependencies in mix.exs:

def deps do
  [ { :expect_ex,
      git: "https://gitlab.com/jonnystorm/expect-elixir.git"
    },
  ]
end

2. Ensure expect_ex is started before your application:

def application do
  [applications: [:expect_ex]]
end

Example

iex> use Expect2
Expect2

iex> process = exp_spawn "telnet 192.0.2.3"
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}

iex> expect process, "Password: "
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}

iex> exp_send process, "admin\n"
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}

iex> expect process, 1_000, ~r/>$/
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}

iex> exp_send process, "sho ip route\n"
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}

iex> expect process, 1_000, fn {event, buffer} ->
  cond do
    buffer =~ ~r/>$/ ->
      buffer

    event == :timeout ->
      :not_what_i_expected  # Ha!
  end
end
{:ok, "sho ip route\r\nCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP\r\n       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area \r\n       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2\r\n       E1 - OSPF external type 1, E2 - OSPF external type 2\r\n       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2\r\n       ia - IS-IS inter area, * - candidate default, U - per-user static route\r\n       o - ODR, P - periodic downloaded static route\r\n\r\nGateway of last resort is 192.0.2.2 to network 0.0.0.0\r\n\r\n     198.51.100.0/32 is subnetted, 5 subnets\r\nC       198.51.100.1 is directly connected, Loopback0\r\ni L2    198.51.100.3 [115/100000] via 198.51.100.3, FastEthernet0/1.1\r\ni L2    198.51.100.2 [115/100000] via 198.51.100.2, FastEthernet0/0.1\r\ni L2    198.51.100.5 [115/300000] via 198.51.100.3, FastEthernet0/1.1\r\n                     [115/300000] via 198.51.100.2, FastEthernet0/0.1\r\ni L2    198.51.100.4 [115/200000] via 198.51.100.3, FastEthernet0/1.1\r\n     192.0.2.0/31 is subnetted, 1 subnets\r\nC       192.0.2.2 is directly connected, FastEthernet1/0\r\nS*   0.0.0.0/0 [1/0] via 192.0.2.2\r\nR1>"}

iex> exp_send process, "exit\n"
{:ok, %Porcelain.Process{err: nil, out: {:send, #PID<0.143.0>}, pid: #PID<0.146.0>}}