Extend dotfiles to support Linux via standalone home-manager (#6)

4 files changed, 35 insertions, 8 deletions

diff --git a/README.md b/README.md
index 3ac45ac..8f41851 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # dotfiles
 
-My Development Setup, managed with [Nix](https://nixos.org), [nix-darwin](https://github.com/LnL7/nix-darwin), and [home-manager](https://github.com/nix-community/home-manager).
+My Development Setup, managed with [Nix](https://nixos.org), [nix-darwin](https://github.com/LnL7/nix-darwin), and [home-manager](https://github.com/nix-community/home-manager). Works on macOS and Linux.
 
 ## Quickstart
 
@@ -20,6 +20,8 @@ git submodule update --init --recursive
 
 ### 3. Apply the configuration
 
+#### macOS
+
 On first run, bootstrap nix-darwin:
 
 ```shell
@@ -32,18 +34,30 @@ On subsequent runs:
 darwin-rebuild switch --flake .#default
 ```
 
+#### Linux
+
+Install [home-manager](https://github.com/nix-community/home-manager) as a standalone tool and apply the configuration:
+
+```shell
+# x86_64 (most common)
+home-manager switch --flake .#simenandre
+
+# aarch64 (ARM64, e.g. Raspberry Pi or ARM cloud instances)
+home-manager switch --flake .#simenandre@aarch64-linux
+```
+
 ## Structure
 
 ```
-flake.nix               # Entry point – nix-darwin + home-manager
+flake.nix               # Entry point – nix-darwin (macOS) + home-manager (macOS & Linux)
 modules/
   darwin/
     default.nix         # System-level configuration (nix settings, core packages)
     homebrew.nix        # Homebrew packages (taps, brews, casks, Mac App Store)
     macos.nix           # macOS system defaults (replaces macos/macos script)
   home/
-    default.nix         # home-manager entry point
-    git.nix             # Git configuration (programs.git)
+    default.nix         # home-manager entry point (platform-aware home directory)
+    git.nix             # Git configuration (platform-aware SSH signing path)
     zsh.nix             # Zsh configuration files
     starship.nix        # Starship prompt configuration
     tmux.nix            # Tmux configuration
diff --git a/flake.nix b/flake.nix
index fa2e203..0e5bab4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,5 +1,5 @@
 {
-  description = "Simen Andre's macOS configuration";
+  description = "Simen Andre's dotfiles configuration";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
@@ -35,5 +35,15 @@
           }
         ];
       };
+
+      homeConfigurations."simenandre" = home-manager.lib.homeManagerConfiguration {
+        pkgs = nixpkgs.legacyPackages."x86_64-linux";
+        modules = [ ./modules/home ];
+      };
+
+      homeConfigurations."simenandre@aarch64-linux" = home-manager.lib.homeManagerConfiguration {
+        pkgs = nixpkgs.legacyPackages."aarch64-linux";
+        modules = [ ./modules/home ];
+      };
     };
 }
diff --git a/modules/home/default.nix b/modules/home/default.nix
index 1c0ae0e..bf1900d 100644
--- a/modules/home/default.nix
+++ b/modules/home/default.nix
@@ -11,7 +11,7 @@
 
   home = {
     username = "simenandre";
-    homeDirectory = "/Users/simenandre";
+    homeDirectory = if pkgs.stdenv.isDarwin then "/Users/simenandre" else "/home/simenandre";
     # Do not change this after the first installation
     stateVersion = "24.11";
   };
diff --git a/modules/home/git.nix b/modules/home/git.nix
index b42161e..e79a760 100644
--- a/modules/home/git.nix
+++ b/modules/home/git.nix
@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   programs.git = {
@@ -40,7 +40,10 @@
       merge.log = true;
       push.autoSetupRemote = true;
       gpg.format = "ssh";
-      "gpg \"ssh\"".program = "/Applications/1Password.app/Contents/MacOS/op-ssh-sign";
+      "gpg \"ssh\"".program =
+        if pkgs.stdenv.isDarwin
+        then "/Applications/1Password.app/Contents/MacOS/op-ssh-sign"
+        else "/opt/1Password/op-ssh-sign";
       github.user = "simenandre";
       pull.rebase = true;
       "url \"ssh://git@github.com/\"".insteadOf = "https://github.com/";