feat: args variable (resolves #49)

anytime hilbish is ran as shebang or given a script to run,
itll provide an `args` variable which will be the args a user
provides to the script.
it includes the execute path, as most argv's do

lua.go

@@ -65,9 +65,9 @@ func LuaInit() {
 	.. os.getenv 'HOME'	.. '/.local/share/hilbish/libs/?.lua'
 	`)
 
-	err := l.DoFile("/usr/share/hilbish/preload.lua")
+	err := l.DoFile("preload.lua")
 	if err != nil {
-		err = l.DoFile("preload.lua")
+		err = l.DoFile("/usr/share/hilbish/preload.lua")
 		if err != nil {
 			fmt.Fprintln(os.Stderr,
 				"Missing preload file, builtins may be missing.")

main.go

@@ -14,10 +14,11 @@ import (
 	"github.com/pborman/getopt"
 	"github.com/bobappleyard/readline"
 	"github.com/yuin/gopher-lua"
+	"layeh.com/gopher-luar"
 	"golang.org/x/term"
 )
 
-const version = "0.4.0"
+const version = "0.4.1-dev.7"
 
 var (
 	l *lua.LState
@@ -46,7 +47,7 @@ func main() {
 //	parser := argparse.NewParser("hilbish", "A shell for lua and flower lovers")
 	verflag := getopt.BoolLong("version", 'v', "Prints Hilbish version")
 	setshflag := getopt.BoolLong("setshellenv", 'S', "Sets $SHELL to Hilbish's executed path")
-	cmdflag := getopt.StringLong("command", 'c', "", /*TODO: Help description*/ "")
+	cmdflag := getopt.StringLong("command", 'c', "", "Executes a command on startup")
 	configflag := getopt.StringLong("config", 'C', defaultconfpath, "Sets the path to Hilbish's config")
 	getopt.BoolLong("login", 'l', "Makes Hilbish act like a login shell")
 	getopt.BoolLong("interactive", 'i', "Force Hilbish to be an interactive shell")
@@ -108,13 +109,17 @@ func main() {
 		}
 	}
 
+	go HandleSignals()
 	LuaInit()
-
 	RunLogin()
-	RunInput(*cmdflag)
 	RunConfig(*configflag)
 
+	readline.Completer = readline.FilenameCompleter
+	readline.LoadHistory(homedir + "/.hilbish-history")
+
+	RunInput(*cmdflag)
 	if getopt.NArgs() > 0 {
+		l.SetGlobal("args", luar.New(l, getopt.Args()))
 		err := l.DoFile(getopt.Arg(0))
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
@@ -123,11 +128,6 @@ func main() {
 		os.Exit(0)
 	}
 
-	readline.Completer = readline.FilenameCompleter
-	readline.LoadHistory(homedir + "/.hilbish-history")
-
-	go HandleSignals()
-
 	for interactive {
 		running = false
 

preload.lua

@@ -20,8 +20,8 @@ commander.register('cd', function (args)
 			if err == 1 then
 				print('directory does not exist')
 			end
-			bait.throw('command.exit', err)
-		else bait.throw('command.exit', 0) end
+			return err
+		end
 		return
 	end
 	fs.cd(os.getenv 'HOME')

shell.go

@@ -52,9 +52,17 @@ func RunInput(input string) {
 					l.GetGlobal("commanding"),
 					lua.LString("__commands")),
 				cmdArgs[0]),
-			NRet:    0,
+			NRet:    1,
 			Protect: true,
 		}, luar.New(l, cmdArgs[1:]))
+		luaexitcode := l.Get(-1)
+		exitcode := lua.LNumber(0)
+
+		l.Pop(1)
+
+		if code, ok := luaexitcode.(lua.LNumber); luaexitcode != lua.LNil && ok {
+			exitcode = code
+		}
 		if err != nil {
 			fmt.Fprintln(os.Stderr,
 				"Error in command:\n\n" + err.Error())
@@ -62,6 +70,7 @@ func RunInput(input string) {
 		if cmdArgs[0] != "exit" {
 			HandleHistory(cmdString)
 		}
+		hooks.Em.Emit("command.exit", exitcode)
 		return
 	}