modularize git

modules/home/programs/git/default.nix

@@ -0,0 +1,59 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.home.programs.git;
+in {
+  options = {
+    home.programs.git.enable = mkEnableOption "Enables git";
+  };
+  config = mkIf cfg.enable {
+    home.packages = [pkgs.gh];
+    programs.git = {
+      enable = true;
+      userName = config.accounts.username;
+      userEmail = config.accounts.mail;
+      delta = {
+        enable = true;
+        options.dark = true;
+      };
+      extraConfig = {
+        # user.signingkey = "${config.home.homeDirectory}/.ssh/id_ed25519.pub";
+        user.signingkey = "${config.home.homeDirectory}/.config/git/allowed_signers";
+        signing = {
+          format = lib.mkDefault "ssh";
+          key = "${config.home.homeDirectory}/.ssh/id_ed25519";
+          signByDefault = true;
+        };
+        gpg = {
+          # format = lib.mkDefault "ssh";
+          ssh.allowedSignersFile = config.home.homeDirectory + "/" + config.xdg.configFile."git/allowed_signers".target;
+        };
+        commit = {
+          verbose = true;
+          gpgSign = false;
+        };
+        init.defaultBranch = "main";
+        merge.conflictStyle = "diff3";
+        diff.algorithm = "histogram";
+        log.date = "iso";
+        column.ui = "auto";
+        branch.sort = "committerdate";
+        push.autoSetupRemote = true;
+        rerere.enabled = true;
+      };
+      lfs.enable = true;
+      ignores = [
+        ".direnv"
+        "result"
+        ".jj"
+      ];
+    };
+    xdg.configFile."git/allowed_signers".text = ''
+      ${config.accounts.mail} namespaces="git" ${config.accounts.sshKey}
+    '';
+  };
+}