nixpkgs/nixos/tests/amazon-init-shell.nix

# This test verifies that the amazon-init service can treat the `user-data` ec2
# metadata file as a shell script. If amazon-init detects that `user-data` is a
# script (based on the presence of the shebang #! line) it executes it and
# exits.
# Note that other tests verify that amazon-init can treat user-data as a nixos
# configuration expression.

{ system ? builtins.currentSystem,
  config ? {},
  pkgs ? import ../.. { inherit system config; }
}:

with import ../lib/testing-python.nix { inherit system pkgs; };
with pkgs.lib;

makeTest {
  name = "amazon-init";
  meta = with maintainers; {
    maintainers = [ urbas ];
  };
  nodes.machine = { lib, pkgs, ... }:
  {
    imports = [ ../modules/profiles/headless.nix ../modules/virtualisation/amazon-init.nix ];
    services.openssh.enable = true;
    system.switch.enable = true;
    networking.hostName = "";
    environment.etc."ec2-metadata/user-data" = {
      text = ''
        #!/usr/bin/bash

        echo successful > /tmp/evidence

        # Emulate running nixos-rebuild switch, just without any building.
        # https://github.com/nixos/nixpkgs/blob/4c62505847d88f16df11eff3c81bf9a453a4979e/nixos/modules/virtualisation/amazon-init.nix#L55
        /run/current-system/bin/switch-to-configuration test
      '';
    };
  };
  testScript = ''
    # To wait until amazon-init terminates its run
    unnamed.wait_for_unit("amazon-init.service")

    unnamed.succeed("grep -q successful /tmp/evidence")
  '';
}