From ba17b0ee0cabfc30e546730b47c6f57b83331a69 Mon Sep 17 00:00:00 2001
From: technofab <admin@technofab.de>
Date: Sat, 27 Apr 2024 19:52:51 +0200
Subject: [PATCH] feat: add dotfile loading via home-manager

---
 image.nix                     |  5 +++--
 nix-kubernetes/coder.nix      | 15 +++++++++++++++
 nix-kubernetes/kubernetes.nix |  4 ++++
 nix-kubernetes/parameters.nix | 25 +++++++++++++++++++------
 4 files changed, 41 insertions(+), 8 deletions(-)

diff --git a/image.nix b/image.nix
index 10bed46..9736a4d 100644
--- a/image.nix
+++ b/image.nix
@@ -17,8 +17,9 @@ pkgs.dockerTools.buildLayeredImage {
       pkgs.openssh
       pkgs.git
       pkgs.curl
-      pkgs.home-manager
-      pkgs.direnv
+      (pkgs.writeShellScriptBin "reload-dotfiles" ''
+        ${pkgs.home-manager}/bin/home-manager switch --flake ''${DOTFILES_REPO:-$1}
+      '')
       (pkgs.writeTextDir "etc/nix/nix.conf" "experimental-features = nix-command flakes")
       (pkgs.writeTextDir "etc/passwd" "coder:x:1000:1000::/home/coder:/bin/bash")
       (pkgs.writeTextDir "etc/shadow" "coder:!:::::::")
diff --git a/nix-kubernetes/coder.nix b/nix-kubernetes/coder.nix
index bf7de48..227153e 100644
--- a/nix-kubernetes/coder.nix
+++ b/nix-kubernetes/coder.nix
@@ -39,5 +39,20 @@
       run_on_start = true;
       start_blocks_login = true;
     };
+    coder_script."home-manager" = {
+      agent_id = "\${coder_agent.coder.id}";
+      display_name = "Home Manager";
+      icon = "/emojis/1f3e0.png";
+      script = ''
+        if [ ! -z "$DOTFILES_REPO" ] then
+          echo "Dotfiles present, reloading home-manager profile"
+          reload-dotfiles
+        else
+          echo "No dotfiles repo specified, skipping..."
+        fi
+      '';
+      run_on_start = true;
+      start_blocks_login = true;
+    };
   };
 }
diff --git a/nix-kubernetes/kubernetes.nix b/nix-kubernetes/kubernetes.nix
index 482d017..1c5cc30 100644
--- a/nix-kubernetes/kubernetes.nix
+++ b/nix-kubernetes/kubernetes.nix
@@ -54,6 +54,10 @@
                 name = "CODER_AGENT_TOKEN";
                 value = "\${resource.coder_agent.coder.token}";
               }
+              {
+                name = "DOTFILES_REPO";
+                value = "\${data.coder_parameter.dotfiles_repo.value}";
+              }
             ];
             resources = {
               requests = {
diff --git a/nix-kubernetes/parameters.nix b/nix-kubernetes/parameters.nix
index cd305f9..630bfbb 100644
--- a/nix-kubernetes/parameters.nix
+++ b/nix-kubernetes/parameters.nix
@@ -1,12 +1,25 @@
 {...}: {
   data.coder_parameter = {
+    dotfiles_repo = {
+      name = "Dotfiles Repository (passed to home-manager)";
+      description = ''
+        Nix flake URI to your dotfiles repository, eg.
+          github:example/dotfiles#coder
+
+        Your flake.nix has to expose a homeManagerConfiguration.coder in this case.
+      '';
+      default = "";
+      order = 1;
+      type = "string";
+      mutable = true;
+    };
     git_repo = {
       name = "Git Repository";
       description = ''
         URI for a git repository which should automatically be cloned to ~/repos/<name>
       '';
       default = "";
-      order = 1;
+      order = 2;
       type = "string";
       mutable = true;
     };
@@ -16,7 +29,7 @@
         Which container image tag should be used.
       '';
       default = "latest";
-      order = 2;
+      order = 3;
       type = "string";
       mutable = true;
     };
@@ -26,7 +39,7 @@
         CPU Limit for Kubernetes Pod. Kubernetes Notation (eg. 500m)
       '';
       default = "500m";
-      order = 3;
+      order = 4;
       type = "string";
       mutable = true;
     };
@@ -36,7 +49,7 @@
         Memory Limit for Kubernetes Pod. Kubernetes Notation (eg. 1Gi)
       '';
       default = "1Gi";
-      order = 4;
+      order = 5;
       type = "string";
       mutable = true;
     };
@@ -46,7 +59,7 @@
         Size for the /home PV in GB
       '';
       default = 5;
-      order = 5;
+      order = 6;
       type = "number";
       mutable = true;
       validation = [
@@ -63,7 +76,7 @@
         Size for the /nix PV in GB. This might grow pretty big.
       '';
       default = 5;
-      order = 6;
+      order = 7;
       type = "number";
       mutable = true;
       validation = [