initial commit

users/modules/vcs/jujutsu.nix

@@ -0,0 +1,55 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.modules.jj;
+in {
+  options.modules.jj = {
+    enable = mkEnableOption "enables jj";
+    name = mkOption {
+      type = types.str;
+      default = "Lucien Cartier-Tilet";
+    };
+    email = mkOption {
+      type = types.str;
+      default = "lucien@phundrak.com";
+    };
+    editor = mkOption {
+      type = types.str;
+      default = "${pkgs.emacs}/bin/emacsclient -c -a ${pkgs.emacs}/bin/emacs";
+    };
+    signing = {
+      enable = mkEnableOption "enables signing jj commits";
+      sshKey = mkOption {
+        type = with types; nullOr (either path str);
+        example = "~/.ssh/id_ed25519.pub";
+        default = "~/.ssh/id_ed25519.pub";
+        description = "Path to the public SSH key or its content.";
+      };
+    };
+  };
+
+  config.programs.jujutsu = mkIf cfg.enable {
+    enable = true;
+    settings = {
+      user = {
+        inherit (cfg) name email;
+      };
+      ui = {
+        default-command = "st";
+        pager = ":builtin";
+        inherit (cfg) editor;
+      };
+      signing = mkIf cfg.signing.enable {
+        behavior = "own";
+        backend = "ssh";
+        key = cfg.signing.sshKey;
+        backends."ssh.allowed-signers" = "~/.ssh/allowed_signers";
+        backends."ssh.program" = "${pkgs.openssh}/bin/ssh-keygen";
+      };
+    };
+  };
+}