small fix on scripting stop func, added quick start guide

README.md

@@ -1,6 +1,6 @@
 # Evented Scripting Cluster (name subject to change)
 
-This project is an study and attempt to create an replicated cluster of scripts to fire events and commands on and off.
+This project is an study and attempt to create a replicated cluster of scripts to fire events and commands on and off.
 
 ## Features
 
@@ -21,7 +21,23 @@ Soon:
 - Docker swarm compatible 
 - Join mode / non-discovery mode
 
-## Usage
+## Quick start
+
+Download the proper binary from the [releases page](https://github.com/diogok/esc/releases):
+
+    $ wget https://github.com/diogok/esc/releases/download/0.0.1/esc-amd64 -O esc
+
+Create scripts directory:
+
+    $ mkdir scripts
+
+Start the program on proper network interface:
+
+    $ ./esc -iface wlan0
+
+Repeat on all nodes, edit the scripts on any one of them.
+
+## Complete usage
 
 Download the binary from the [releases page](https://github.com/diogok/esc/releases).
 

scripting.go

@@ -16,11 +16,14 @@ type Script struct {
 	Lua       *lua.LState
 	Listeners []*Listener
 
+	Active bool
+
 	File string
 	Hash string
 }
 
 func stopScript(script *Script) {
+	script.Active = false
 	for _, listener := range script.Listeners {
 		Off(listener)
 	}
@@ -126,11 +129,14 @@ func luaSelf(vm *lua.LState) int {
 	return 1
 }
 
-func luaTicker(vm *lua.LState) int {
+func luaTicker(script *Script, vm *lua.LState) int {
 	sec := vm.ToInt(1)
 	fun := vm.ToFunction(2)
 	go func() {
 		for {
+			if !script.Active {
+				return
+			}
 			err := vm.CallByParam(lua.P{
 				Fn:      fun,
 				NRet:    1,
@@ -156,11 +162,11 @@ func startScript(file string) *Script {
 	vm := lua.NewState()
 
 	script := Script{
-		Lua:  vm,
-		File: file,
+		Lua:    vm,
+		File:   file,
+		Active: true,
 	}
 
-	vm.SetGlobal("tick", vm.NewFunction(luaTicker))
 	vm.SetGlobal("self", vm.NewFunction(luaSelf))
 	vm.SetGlobal("log", vm.NewFunction(luaLog))
 	vm.SetGlobal("set", vm.NewFunction(luaSet))
@@ -171,6 +177,9 @@ func startScript(file string) *Script {
 	vm.SetGlobal("onCommand", vm.NewFunction(func(vm *lua.LState) int {
 		return luaOnCmd(&script, vm)
 	}))
+	vm.SetGlobal("tick", vm.NewFunction(func(vm *lua.LState) int {
+		return tick(&script, vm)
+	}))
 	vm.SetGlobal("sendEvent", vm.NewFunction(luaSendEvt))
 	vm.SetGlobal("sendCommand", vm.NewFunction(luaSendCmd))
 	vm.SetGlobal("sendCommandC", vm.NewFunction(luaSendCmdC))