From 97072e8eae24c480938e53144ce6974ed0cedeb8 Mon Sep 17 00:00:00 2001
From: Guanran Wang <guanran928@outlook.com>
Date: Mon, 27 Nov 2023 20:33:27 +0800
Subject: [PATCH] treewide: set mirrors by timezone

---
 darwin/profiles/core/nix/nix.nix | 30 ++++++++++++++++++++----------
 nixos/profiles/core/nix/nix.nix  | 29 +++++++++++++++++++----------
 2 files changed, 39 insertions(+), 20 deletions(-)

diff --git a/darwin/profiles/core/nix/nix.nix b/darwin/profiles/core/nix/nix.nix
index c365c6d..8d6881a 100755
--- a/darwin/profiles/core/nix/nix.nix
+++ b/darwin/profiles/core/nix/nix.nix
@@ -1,15 +1,25 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}: {
   nix.settings = {
     trusted-users = ["@admin"];
-    substituters = [
-      "https://mirrors.ustc.edu.cn/nix-channels/store" # USTC - 中国科学技术大学 Mirror
-      "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store" # TUNA - 清华大学 Mirror
-      "https://mirrors.bfsu.edu.cn/nix-channels/store" # BFSU - 北京外国语大学 Mirror
-      "https://mirror.sjtu.edu.cn/nix-channels/store" # SJTU - 上海交通大学 Mirror
-
-      "https://nix-community.cachix.org"
-      "https://cache.garnix.io"
-    ];
+    substituters =
+      lib.mkMerge
+      [
+        (lib.mkIf (config.time.timeZone == "Asia/Shanghai") [
+          "https://mirrors.ustc.edu.cn/nix-channels/store" # USTC - 中国科学技术大学 Mirror
+          "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store" # TUNA - 清华大学 Mirror
+          "https://mirrors.bfsu.edu.cn/nix-channels/store" # BFSU - 北京外国语大学 Mirror
+          "https://mirror.sjtu.edu.cn/nix-channels/store" # SJTU - 上海交通大学 Mirror
+        ])
+        [
+          "https://nix-community.cachix.org"
+          "https://cache.garnix.io"
+        ]
+      ];
     trusted-public-keys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
       "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
diff --git a/nixos/profiles/core/nix/nix.nix b/nixos/profiles/core/nix/nix.nix
index 51db219..16bd75d 100755
--- a/nixos/profiles/core/nix/nix.nix
+++ b/nixos/profiles/core/nix/nix.nix
@@ -1,15 +1,24 @@
-{lib, ...}: {
+{
+  lib,
+  config,
+  ...
+}: {
   nix.settings = {
     trusted-users = ["@wheel"];
-    substituters = [
-      "https://mirrors.ustc.edu.cn/nix-channels/store" # USTC - 中国科学技术大学 Mirror
-      "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store" # TUNA - 清华大学 Mirror
-      "https://mirrors.bfsu.edu.cn/nix-channels/store" # BFSU - 北京外国语大学 Mirror
-      "https://mirror.sjtu.edu.cn/nix-channels/store" # SJTU - 上海交通大学 Mirror
-
-      "https://nix-community.cachix.org"
-      "https://cache.garnix.io"
-    ];
+    substituters =
+      lib.mkMerge
+      [
+        (lib.mkIf (config.time.timeZone == "Asia/Shanghai") [
+          "https://mirrors.ustc.edu.cn/nix-channels/store" # USTC - 中国科学技术大学 Mirror
+          "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store" # TUNA - 清华大学 Mirror
+          "https://mirrors.bfsu.edu.cn/nix-channels/store" # BFSU - 北京外国语大学 Mirror
+          "https://mirror.sjtu.edu.cn/nix-channels/store" # SJTU - 上海交通大学 Mirror
+        ])
+        [
+          "https://nix-community.cachix.org"
+          "https://cache.garnix.io"
+        ]
+      ];
     trusted-public-keys = [
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
       "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="