From a92835264100583903dc408abe43d461ff7d4dca Mon Sep 17 00:00:00 2001
From: Sergey Gulin
Date: Wed, 27 Mar 2024 12:22:02 +0300
Subject: [OPS-1384] Introduce NixOS VM tests

Problem: Currently, the only way to test deploy-rs deployments is to
actually do a deployment to an existing NixOS instance (either in VM,
or a real machine) manually. This is a bit inconvenient and one can
forget to test changes when developing/reviewing deploy-rs changes.

Solution: Add NixOS VM tests.
---
 nix/tests/deploy-flake.nix | 72 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 nix/tests/deploy-flake.nix

(limited to 'nix/tests/deploy-flake.nix')

diff --git a/nix/tests/deploy-flake.nix b/nix/tests/deploy-flake.nix
new file mode 100644
index 0000000..3e1e426
--- /dev/null
+++ b/nix/tests/deploy-flake.nix
@@ -0,0 +1,72 @@
+# SPDX-FileCopyrightText: 2024 Serokell <https://serokell.io/>
+#
+# SPDX-License-Identifier: MPL-2.0
+
+{
+  inputs = {
+    # real inputs are substituted in ./default.nix
+##inputs##
+  };
+
+  outputs = { self, nixpkgs, deploy-rs, ... }@inputs: let
+    system = "x86_64-linux";
+    pkgs = inputs.nixpkgs.legacyPackages.${system};
+    user = "deploy";
+  in {
+    nixosConfigurations.server = nixpkgs.lib.nixosSystem {
+      inherit system pkgs;
+      specialArgs = { inherit inputs; };
+      modules = [
+        ./server.nix
+        ./common.nix
+        # Import the base config used by nixos tests
+        (pkgs.path + "/nixos/lib/testing/nixos-test-base.nix")
+        # Deployment breaks the network settings, so we need to restore them
+        (pkgs.lib.importJSON ./network.json)
+        # Deploy packages
+        { environment.systemPackages = [ pkgs.figlet pkgs.hello ]; }
+      ];
+    };
+
+    deploy.nodes = {
+      server = {
+        hostname = "server";
+        sshUser = "root";
+        sshOpts = [
+          "-o" "StrictHostKeyChecking=no"
+          "-o" "StrictHostKeyChecking=no"
+        ];
+        profiles.system.path = deploy-rs.lib."${system}".activate.nixos self.nixosConfigurations.server;
+      };
+      server-override = {
+        hostname = "override";
+        sshUser = "override";
+        user = "override";
+        sudo = "override";
+        sshOpts = [ ];
+        confirmTimeout = 0;
+        activationTimeout = 0;
+        profiles.system.path = deploy-rs.lib."${system}".activate.nixos self.nixosConfigurations.server;
+      };
+      profile = {
+        hostname = "server";
+        sshUser = "${user}";
+        sshOpts = [
+          "-o" "UserKnownHostsFile=/dev/null"
+          "-o" "StrictHostKeyChecking=no"
+        ];
+        profiles = {
+          "hello-world".path = let
+            activateProfile = pkgs.writeShellScriptBin "activate" ''
+              set -euo pipefail
+              mkdir -p /home/${user}/.nix-profile/bin
+              rm -f -- /home/${user}/.nix-profile/bin/hello /home/${user}/.nix-profile/bin/figlet
+              ln -s ${pkgs.hello}/bin/hello /home/${user}/.nix-profile/bin/hello
+              ln -s ${pkgs.figlet}/bin/figlet /home/${user}/.nix-profile/bin/figlet
+            '';
+          in deploy-rs.lib.${system}.activate.custom activateProfile "$PROFILE/bin/activate";
+        };
+      };
+    };
+  };
+}
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