Fix stable sing-box variant detection

forkop/files/usr/lib/singbox/runtime.uc

@@ -292,6 +292,17 @@ function sing_box_supports_tailscale(version, version_output) {
     return output_has_build_tag(sing_box_version_output(), "with_tailscale");
 }
 
+function module_command(args) {
+    let command_args = [ "ucode", "-L", LIB_DIR ];
+    for (let arg in args)
+        push(command_args, arg);
+    return command_from_args(command_args);
+}
+
+function module_success(args) {
+    return command_status(module_command(args)) == 0;
+}
+
 function sing_box_package_installed(name) {
     return module_success([ LIB_DIR + "/core/packages.uc", "installed", as_string(name) ]);
 }
@@ -332,17 +343,6 @@ function log_message(message, level) {
     command_success_from_args([ "logger", "-t", "forkop", "[" + level + "] " + as_string(message) ]);
 }
 
-function module_command(args) {
-    let command_args = [ "ucode", "-L", LIB_DIR ];
-    for (let arg in args)
-        push(command_args, arg);
-    return command_from_args(command_args);
-}
-
-function module_success(args) {
-    return command_status(module_command(args)) == 0;
-}
-
 function module_env_capture(env, args) {
     let output_path = temp_path();
     if (output_path == "")

tests/sing_box_runtime.sh

@@ -76,6 +76,24 @@ END {
   fail "reload-state cleanup must not delete subscription section-cache"
 fi
 
+mkdir -p "$WORK_DIR/bin"
+cat >"$WORK_DIR/bin/sing-box" <<'EOF_SING_BOX'
+#!/bin/sh
+echo 'sing-box version 1.12.25'
+EOF_SING_BOX
+chmod +x "$WORK_DIR/bin/sing-box"
+stable_variant="$({
+  PATH="$WORK_DIR/bin:$PATH" \
+    FORKOP_LIB="$FORKOP_LIB" \
+    SB_VARIANT_STATE_FILE="$WORK_DIR/sing-box-variant" \
+    ucode -L "$FORKOP_LIB" "$SINGBOX_RUNTIME_UC" variant
+} 2>"$WORK_DIR/stable-variant.stderr")" ||
+  fail "singbox/runtime.uc must detect a stable binary without a ucode call-order failure"
+[ "$stable_variant" = "stable" ] ||
+  fail "singbox/runtime.uc should classify a regular sing-box binary as stable"
+[ ! -s "$WORK_DIR/stable-variant.stderr" ] ||
+  fail "stable sing-box variant detection must not emit ucode runtime errors"
+
 mkdir -p "$WORK_DIR/etc" "$WORK_DIR/tmp"
 printf 'old config\n' >"$WORK_DIR/etc/config.json"
 printf 'new config\n' >"$WORK_DIR/tmp/config.json"