Basic configuration for new servers and start modularizing config

modules/git.nix

@@ -0,0 +1,57 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options.chvp.git = {
+    enable = lib.mkOption {
+      default = true;
+      example = false;
+    };
+    email = lib.mkOption {
+      type = lib.types.str;
+      default = "charlotte@vanpetegem.me";
+      example = "charlotte@vanpetegem.me";
+      description = ''
+        Default email set in global git config.
+      '';
+    };
+  };
+
+  config =
+    let
+      base = {
+        home.packages = with pkgs; [
+          gitAndTools.gitflow
+          git-crypt
+        ];
+        programs.git = {
+          enable = true;
+          extraConfig = {
+            branch = {
+              autosetuprebase = "always";
+            };
+            pull = {
+              rebase = true;
+            };
+          };
+          ignores = [
+            ".direnv"
+            ".envrc"
+            "shell.nix"
+            # Ruby dependencies in source tree
+            "/vendor/bundle"
+            "**/*.patch"
+          ];
+          signing = {
+            key = "charlotte@vanpetegem.me";
+            signByDefault = config.chvp.graphical;
+          };
+          userEmail = config.chvp.git.email;
+          userName = "Charlotte Van Petegem";
+        };
+      };
+    in
+    lib.mkIf config.chvp.git.enable {
+      home-manager.users.charlotte = { ... }: base;
+      home-manager.users.root = { ... }: base;
+    };
+}