From 97b44dfe716cec39d8c303864444fc12a84e1625 Mon Sep 17 00:00:00 2001
From: Iampete1 <iampete@hotmail.co.uk>
Date: Tue, 27 Oct 2020 01:08:14 +0000
Subject: [PATCH] AP_Scripting: add DIR_DISABLE param

---
 libraries/AP_Scripting/AP_Scripting.cpp |  8 ++++++++
 libraries/AP_Scripting/AP_Scripting.h   |  7 +++++++
 libraries/AP_Scripting/lua_scripts.cpp  | 16 ++++++++++++++--
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/libraries/AP_Scripting/AP_Scripting.cpp b/libraries/AP_Scripting/AP_Scripting.cpp
index 31c92d16e07c3..807d90d24b22d 100644
--- a/libraries/AP_Scripting/AP_Scripting.cpp
+++ b/libraries/AP_Scripting/AP_Scripting.cpp
@@ -101,6 +101,14 @@ const AP_Param::GroupInfo AP_Scripting::var_info[] = {
     // @User: Standard
     AP_GROUPINFO("USER4", 8, AP_Scripting, _user[3], 0.0),
 
+    // @Param: DIR_DISABLE
+    // @DisplayName: Directory disable
+    // @Description: This will stop scripts being loaded from the given locations
+    // @Bitmask: 0:ROMFS, 1:APM/scripts
+    // @RebootRequired: True
+    // @User: Advanced
+    AP_GROUPINFO("DIR_DISABLE", 9, AP_Scripting, _dir_disable, 0),
+
     AP_GROUPEND
 };
 
diff --git a/libraries/AP_Scripting/AP_Scripting.h b/libraries/AP_Scripting/AP_Scripting.h
index 01ccbc6dbeb7d..71891fef4fedb 100644
--- a/libraries/AP_Scripting/AP_Scripting.h
+++ b/libraries/AP_Scripting/AP_Scripting.h
@@ -50,6 +50,12 @@ class AP_Scripting
         bool session;
     } terminal;
 
+    enum class SCR_DIR {
+        ROMFS = 1 << 0,
+        SCRIPTS = 1 << 1,
+    };
+    uint16_t get_disabled_dir() { return uint16_t(_dir_disable.get());}
+
 private:
 
     bool repl_start(void);
@@ -63,6 +69,7 @@ class AP_Scripting
     AP_Int32 _script_vm_exec_count;
     AP_Int32 _script_heap_size;
     AP_Int8 _debug_level;
+    AP_Int16 _dir_disable;
 
     bool _init_failed;  // true if memory allocation failed
 
diff --git a/libraries/AP_Scripting/lua_scripts.cpp b/libraries/AP_Scripting/lua_scripts.cpp
index 3b6f85392d056..e497496094540 100644
--- a/libraries/AP_Scripting/lua_scripts.cpp
+++ b/libraries/AP_Scripting/lua_scripts.cpp
@@ -363,8 +363,20 @@ void lua_scripts::run(void) {
     load_generated_bindings(L);
 
     // Scan the filesystem in an appropriate manner and autostart scripts
-    load_all_scripts_in_dir(L, SCRIPTING_DIRECTORY);
-    load_all_scripts_in_dir(L, "@ROMFS/scripts");
+    // Skip those directores disabled with SCR_DIR_DISABLE param
+    uint16_t dir_disable = AP_Scripting::get_singleton()->get_disabled_dir();
+    bool loaded = false;
+    if ((dir_disable & uint16_t(AP_Scripting::SCR_DIR::SCRIPTS)) == 0) {
+        load_all_scripts_in_dir(L, SCRIPTING_DIRECTORY);
+        loaded = true;
+    }
+    if ((dir_disable & uint16_t(AP_Scripting::SCR_DIR::ROMFS)) == 0) {
+        load_all_scripts_in_dir(L, "@ROMFS/scripts");
+        loaded = true;
+    }
+    if (!loaded) {
+        gcs().send_text(MAV_SEVERITY_CRITICAL, "Lua: All directory's disabled see SCR_DIR_DISABLE");
+    }
 
 #ifndef __clang_analyzer__
     succeeded_initial_load = true;