[box.tool] Add option to download sing-box "Pre-release" and "Latest release" https://github.com/taamarin/box_for_magisk/issues/133

box/scripts/box.tool

@@ -10,6 +10,7 @@ url_ghproxy="https://mirror.ghproxy.com"
 use_ghproxy="true"
 # to enable/disable download the stable mihomo kernel
 mihomo_stable="enable"
+singbox_stable="disable"
 
 # Updating files from URLs
 upfile() {
@@ -349,7 +350,21 @@ upkernel() {
       api_url="https://api.github.com/repos/SagerNet/sing-box/releases"
       url_down="https://github.com/SagerNet/sing-box/releases"
 
-      latest_version=$(busybox wget --no-check-certificate -qO- "${api_url}" | grep "tag_name" | busybox grep -oE "v[0-9].*" | head -1 | cut -d'"' -f1)
+      if [ "${singbox_stable}" = "disable" ]; then
+        # Pre-release
+        log Debug "download ${bin_name} Pre-release"
+        latest_version=$(busybox wget --no-check-certificate -qO- "${api_url}" | grep "tag_name" | busybox grep -oE "v[0-9].*" | head -1 | cut -d'"' -f1)
+      else
+        # Latest
+        log Debug "download ${bin_name} Latest-stable"
+        latest_version=$(busybox wget --no-check-certificate -qO- "${api_url}/latest" | grep "tag_name" | busybox grep -oE "v[0-9.]*" | head -1)
+      fi
+
+      if [ -z "$latest_version" ]; then
+        log Error "Failed to get latest stable/beta/alpha version of sing-box"
+        return 1
+      fi
+
       download_link="${url_down}/download/${latest_version}/sing-box-${latest_version#v}-${platform}-${arch}.tar.gz"
       log Debug "download ${download_link}"
       upfile "${box_dir}/${file_kernel}.tar.gz" "${download_link}" && xkernel