core: 将 github 代理放到文件头部

reinstall.bat

@@ -1,6 +1,7 @@
 @echo off
-set confhome=https://raw.githubusercontent.com/bin456789/reinstall/main
 setlocal EnableDelayedExpansion
+set confhome=https://raw.githubusercontent.com/bin456789/reinstall/main
+set github_proxy=https://ghps.cc
 
 :: Windows 7 SP1 winhttp 默认不支持 tls 1.2
 :: https://support.microsoft.com/en-us/topic/update-to-enable-tls-1-1-and-tls-1-2-as-default-secure-protocols-in-winhttp-in-windows-c4bd73d2-31d7-761e-0178-11268bb10392
@@ -31,9 +32,11 @@ if !errorlevel! == 0 (
     :: mirrors.tuna.tsinghua.edu.cn 会强制跳转 https
     set mirror=http://mirror.nju.edu.cn
 
-    echo !confhome! | findstr /c:"://raw.githubusercontent.com/" >nul
-    if !errorlevel! == 0 (
-        set confhome=https://ghps.cc/!confhome!
+    if defined github_proxy (
+        echo !confhome! | findstr /c:"://raw.githubusercontent.com/" >nul
+        if !errorlevel! == 0 (
+            set confhome=!github_proxy!/!confhome!
+        )
     )
 ) else (
     :: mirrors.kernel.org 在荷兰太慢

reinstall.sh

@@ -3,6 +3,7 @@
 
 set -eE
 confhome=https://raw.githubusercontent.com/bin456789/reinstall/main
+github_proxy=https://ghps.cc
 
 this_script=$(realpath "$0")
 trap 'trap_err $LINENO $?' ERR
@@ -1301,9 +1302,8 @@ esac
 # gitee 不支持ipv6
 # jsdelivr 有12小时缓存
 # https://github.com/XIU2/UserScript/blob/master/GithubEnhanced-High-Speed-Download.user.js#L31
-if [[ "$confhome" == http*://raw.githubusercontent.com/* ]] &&
-    is_in_china; then
-    confhome=https://ghps.cc/$confhome
+if [ -n "$github_proxy" ] && [[ "$confhome" = http*://raw.githubusercontent.com/* ]] && is_in_china; then
+    confhome=$github_proxy/$confhome
 fi
 
 # 以下目标系统不需要进入alpine