From f96686128fc076b0b64bbc336b1e48b6c0d8d2c3 Mon Sep 17 00:00:00 2001
From: Aloys23 <aloys23@outlook.com>
Date: Sat, 30 May 2026 16:06:38 +0800
Subject: [PATCH] add generation limit (10) and weekly garbage collection

---
 configuration.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/configuration.nix b/configuration.nix
index 69737c6..a5d4944 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -18,6 +18,7 @@
 
   # ── 引导 ────────────────────────────────────────────────────
   boot.loader.systemd-boot.enable = true;
+  boot.loader.systemd-boot.configurationLimit = 10; # 只保留最近 10 次迭代
   boot.loader.efi.canTouchEfiVariables = true;
 
   # ── 网络 ────────────────────────────────────────────────────
@@ -138,6 +139,13 @@
     ffmpeg
   ];
 
+  # ── 自动清理旧的系统迭代 ────────────────────────────────────
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 7d";
+  };
+
   # ── 系统状态版本（请勿修改） ────────────────────────────────
   system.stateVersion = "25.11";
 }