refactor: make `hilbish` an already required module and add run function

idk how to explain this man
in code `hilbish` is now a module, which can also be required like
others. but it is already a global export as the variable of the same
name.
also

hilbish.go

@@ -3,9 +3,44 @@
 // go here.
 package main
 
-type Hilbish struct {
-	Version string // Hilbish's version
-	User string // Name of the user
-	Hostname string
+import (
+	"os"
+
+	"github.com/yuin/gopher-lua"
+	"mvdan.cc/sh/v3/interp"
+)
+
+var exports = map[string]lua.LGFunction {
+	"run": run,
+}
+
+func HilbishLoader(L *lua.LState) int {
+	mod := L.SetFuncs(L.NewTable(), exports)
+
+	host, _ := os.Hostname()
+
+	L.SetField(mod, "ver", lua.LString(version))
+	L.SetField(mod, "user", lua.LString(curuser.Username))
+	L.SetField(mod, "host", lua.LString(host))
+
+	L.Push(mod)
+
+	return 1
+}
+
+// Runs a command
+func run(L *lua.LState) int {
+	var exitcode uint8 = 0
+	cmd := L.CheckString(1)
+	err := execCommand(cmd)
+
+	if code, ok := interp.IsExitStatus(err); ok {
+		exitcode = code
+	} else if err != nil {
+		exitcode = 1
+	}
+
+	L.Push(lua.LNumber(exitcode))
+	return 1
 }
 

lua.go

@@ -12,7 +12,6 @@ import (
 	"hilbish/golibs/fs"
 
 	"github.com/yuin/gopher-lua"
-	"layeh.com/gopher-luar"
 )
 
 var minimalconf = `
@@ -32,7 +31,9 @@ func LuaInit() {
 	l.SetGlobal("appendPath", l.NewFunction(hshappendPath))
 	l.SetGlobal("exec", l.NewFunction(hshexec))
 
-	l.SetGlobal("hilbish", luar.New(l, hilbish))
+	// yes this is stupid, i know
+	l.PreloadModule("hilbish", HilbishLoader)
+	l.DoString("hilbish = require 'hilbish'")
 
 	// Add fs module to Lua
 	l.PreloadModule("fs", fs.Loader)

main.go

@@ -37,7 +37,6 @@ var (
 	interactive bool
 	login bool // Are we the login shell?
 	noexecute bool // Should we run Lua or only report syntax errors
-	hilbish *Hilbish // dont ask
 )
 
 func main() {
@@ -109,14 +108,6 @@ func main() {
 		}
 	}
 
-	host, _ := os.Hostname()
-
-	hilbish = &Hilbish {
-		Version: version,
-		User: curuser.Username,
-		Hostname: host,
-	}
-
 	go HandleSignals()
 	LuaInit()
 	RunLogin()