From fe91fd0cf540753a693b5ffc39433013c2355edd Mon Sep 17 00:00:00 2001
From: Manuel Hutter <manuel@hutter.io>
Date: Wed, 10 Jan 2024 09:42:58 +0100
Subject: [PATCH] Use deploy-rs for deployment

While `nixos-rebuild` does the job, it does not offer advanced features
like magic rollbacks.

Signed-off-by: Manuel Hutter <manuel@hutter.io>
---
 README.md  |  3 ++-
 deploy.sh  | 12 ---------
 flake.lock | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 flake.nix  | 35 ++++++++++++++++++++++----
 4 files changed, 104 insertions(+), 18 deletions(-)
 delete mode 100755 deploy.sh

diff --git a/README.md b/README.md
index d9c51eb..320ee4c 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,11 @@
 # mhnet NixOS configurations
 
-Usage: `./deploy.sh HOST`
+Usage: `deploy`
 
 
 ## Backlog
 
+- [ ] Manage secret data with `agenix`
 - [ ] https://xeiaso.net/blog/paranoid-nixos-2021-07-18/
 - [ ] https://xeiaso.net/blog/paranoid-nixos-aws-2021-08-11/
 
diff --git a/deploy.sh b/deploy.sh
deleted file mode 100755
index 0b78477..0000000
--- a/deploy.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/sh
-set -e -u
-
-if [ "$#" -ne 1 ]; then
-  echo >&2 "usage: $0 HOST"
-  exit 1
-fi
-
-host="$1"
-
-set -x
-nixos-rebuild switch --fast --flake ".#${host}" --target-host "$host" --build-host "$host"
diff --git a/flake.lock b/flake.lock
index b2633cc..5d15501 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,43 @@
 {
   "nodes": {
+    "deploy-rs": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1703087360,
+        "narHash": "sha256-0VUbWBW8VyiDRuimMuLsEO4elGuUw/nc2WDeuO1eN1M=",
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "rev": "b709d63debafce9f5645a5ba550c9e0983b3d1f7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1704811223,
@@ -18,8 +56,42 @@
     },
     "root": {
       "inputs": {
+        "deploy-rs": "deploy-rs",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index 0d4915e..5b97fc7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,19 +1,44 @@
 {
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  description = "Deployment for my server(s)";
 
-  outputs = { self, nixpkgs }:
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    deploy-rs = {
+      url = "github:serokell/deploy-rs";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, deploy-rs }:
     let
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
     in
     {
-      devShell."${system}" = pkgs.mkShell {
-        packages = with pkgs; [ nixos-rebuild ];
+      # Ensure necessary tooling is available
+      devShells."${system}".default = pkgs.mkShell {
+        packages = [ pkgs.deploy-rs ];
       };
 
+      # NixOS configurations
       nixosConfigurations.rhea = nixpkgs.lib.nixosSystem {
-        inherit system;
+        system = "x86_64-linux ";
         modules = [ ./configuration.nix ];
       };
+
+      # Deployment specifications
+      deploy.nodes.rhea = {
+        hostname = "rhea";
+        sshUser = "root";
+        remoteBuild = true;
+
+        profiles.system = {
+          path = deploy-rs.lib.x86_64-linux.activate.nixos self.nixosConfigurations.rhea;
+        };
+      };
+
+      # FIXME: reenable; will pull a gig of dependencies ...
+      # checks = builtins.mapAttrs (system: deployLib: deployLib.deployChecks self.deploy) deploy-rs.lib;
     };
 }
+