little improvements

cmd/packets/main.go

@@ -541,6 +541,7 @@ func Install(packagepath string, serial uint) error {
 
 	L.SetGlobal("packets_package_dir", lua.LString(cfg.Config.DataDir))
 	L.SetGlobal("packets_bin_dir", lua.LString(cfg.Config.BinDir))
+	L.SetGlobal("script", lua.LString(manifest.Hooks.Install))
 	osObject.RawSetString("execute", lua.LNil)
 	osObject.RawSetString("exit", lua.LNil)
 	osObject.RawSetString("getenv", lua.LNil)

internal/internal.go

@@ -199,10 +199,11 @@ func SafeRemove(L *lua.LState) int {
 	if err != nil {
 		L.Push(lua.LFalse)
 		L.Push(lua.LString("[packets] remove failed\n" + err.Error()))
-		return 1
+		return 2
 	}
 	L.Push(lua.LTrue)
-	return 1
+	L.Push(lua.LNil)
+	return 2
 }
 
 func SafeRename(L *lua.LState) int {
@@ -334,7 +335,7 @@ func SafeOpen(L *lua.LState) int {
 	file, err := os.OpenFile(path, modeFlags(mode), 0644)
 	if err != nil {
 		L.Push(lua.LNil)
-		L.Push(lua.LString(err.Error()))
+		L.Push(lua.LString("[packets] open failed\n" + err.Error()))
 		return 2
 	}