migrating config

This deploy logic is primarily based on hxchn's deploy lib [1], with some
slight modifications to make it work with my setup. Everything seems to work
fine for now.

However, I am unsure about the usage of niv — the config doesn't seem to gain
much from it, apart from (some) additional complexity.

[1] https://gitlab.com/hexchen/nixfiles

2 files changed, 55 insertions, 0 deletions

diff --git a/modules/default.nix b/modules/default.nix
new file mode 100644
index 0000000..23a8abc
--- /dev/null
+++ b/modules/default.nix
@@ -0,0 +1,5 @@
+{...}:
+
+{
+	imports = [ ];
+}
diff --git a/modules/deploy/default.nix b/modules/deploy/default.nix
new file mode 100644
index 0000000..e8bc827
--- /dev/null
+++ b/modules/deploy/default.nix
@@ -0,0 +1,50 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.hexchen.deploy;
+
+in {
+  options = {
+    hexchen.deploy = {
+      enable = mkOption {
+        type = types.bool;
+        default = true;
+      };
+      ssh.host = mkOption {
+        type = types.str;
+        default = "${config.networking.hostName}.${config.networking.domain}";
+      };
+      ssh.port = mkOption {
+        type = types.int;
+        default = head config.services.openssh.ports;
+      };
+      substitute = mkOption {
+        type = types.bool;
+        default = true;
+      };
+      groups = mkOption {
+        type = with types; listOf str;
+        default = [];
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    hexchen.deploy.groups = [ "all" ];
+
+    system.build.deployScript = let
+      superuser = if config.security.sudo.enable then "sudo" else "";
+    in pkgs.writeScript "deploy-${config.networking.hostName}" ''
+      #!${pkgs.runtimeShell}
+      set -xeo pipefail
+      export PATH=${with pkgs; lib.makeBinPath [ coreutils openssh nix ]}
+      export NIX_SSHOPTS="$NIX_SSHOPTS -p${toString cfg.ssh.port}"
+      nix copy ${if cfg.substitute then "-s" else ""} --no-check-sigs --to ssh://${cfg.ssh.host} ${config.system.build.toplevel}
+      ssh $NIX_SSHOPTS ${cfg.ssh.host} "${superuser} nix-env -p /nix/var/nix/profiles/system -i ${config.system.build.toplevel}" 
+      ssh $NIX_SSHOPTS ${cfg.ssh.host} "${superuser} /nix/var/nix/profiles/system/bin/switch-to-configuration $1" 
+    '';
+  };
+}
+