Modularize programs and add starship

modules/programs/git.nix

@@ -0,0 +1,46 @@
+{ lib, config, options, pkgs, ... }:
+{
+  options.mods.git = {
+    username = lib.mkOption {
+      default = "DashieTM";
+      example = "globi";
+      type = lib.types.str;
+      description = "Git user name";
+    };
+    email = lib.mkOption {
+      default = "fabio.lenherr@gmail.com";
+      example = "globi@globus.glob";
+      type = lib.types.str;
+      description = "Git email";
+    };
+    ssh_config = lib.mkOption {
+      default = ''
+        Host github.com
+          ${if (config.sops.secrets?hub.path) then "IdentityFile ${config.sops.secrets.hub.path}" else ""}
+        Host gitlab.com
+          ${if (config.sops.secrets?lab.path) then "IdentityFile ${config.sops.secrets.lab.path}" else ""}
+        Host dashie.org
+          ${if (config.sops.secrets?dashie.path) then "IdentityFile ${config.sops.secrets.dashie.path}" else ""}
+      '';
+      example = '''';
+      type = lib.types.lines;
+      description = "ssh configuration (keys for git)";
+    };
+  };
+  config = (lib.optionalAttrs (options?programs.git && options?home.file) {
+    programs.git = {
+      enable = true;
+      userName = config.mods.git.username;
+      userEmail = config.mods.git.email;
+      extraConfig = {
+        merge = {
+          tool = "nvimdiff";
+        };
+        diff = {
+          tool = "nvimdiff";
+        };
+      };
+    };
+    home.file.".ssh/config".text = config.mods.git.ssh_config;
+  });
+}