doing lua functions for build files, to run only in afero.FS

internal/build/lua.go

@@ -0,0 +1,116 @@
+package build
+
+import (
+	"os"
+	"strings"
+
+	lua "github.com/yuin/gopher-lua"
+)
+
+func (container Container) lRemove(L *lua.LState) int {
+	filename := L.CheckString(1)
+
+	err := container.FS.RemoveAll(filename)
+	if err != nil {
+		L.Push(lua.LFalse)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+	L.Push(lua.LTrue)
+	L.Push(lua.LNil)
+	return 2
+}
+
+func (container Container) lRename(L *lua.LState) int {
+	oldname := L.CheckString(1)
+	newname := L.CheckString(2)
+
+	if err := container.FS.Rename(oldname, newname); err != nil {
+		L.Push(lua.LFalse)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+
+	L.Push(lua.LTrue)
+	return 1
+}
+func (container Container) lCopy(L *lua.LState) int {
+	oldname := L.CheckString(1)
+	newname := L.CheckString(2)
+
+	if err := container.copyContainer(oldname, newname); err != nil {
+		L.Push(lua.LFalse)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+
+	L.Push(lua.LTrue)
+	L.Push(lua.LNil)
+	return 2
+
+}
+
+func modeFlags(mode string) int {
+	switch mode {
+	case "r", "rb":
+		return os.O_RDONLY
+	case "w", "wb":
+		return os.O_CREATE | os.O_WRONLY | os.O_TRUNC
+	case "a", "ab":
+		return os.O_CREATE | os.O_WRONLY | os.O_APPEND
+	case "r+", "r+b", "rb+", "br+":
+		return os.O_RDWR
+	case "w+", "w+b", "wb+", "bw+":
+		return os.O_CREATE | os.O_RDWR | os.O_TRUNC
+	case "a+", "a+b", "ab+", "ba+":
+		return os.O_CREATE | os.O_RDWR | os.O_APPEND
+	default:
+		return os.O_RDONLY
+	}
+}
+
+func (container Container) lOpen(L *lua.LState) int {
+	path := L.CheckString(1)
+	mode := L.OptString(2, "r")
+
+	file, err := container.FS.OpenFile(path, modeFlags(mode), 0644)
+	if err != nil {
+		L.Push(lua.LNil)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+
+	ud := L.NewUserData()
+	ud.Value = file
+	L.SetMetatable(ud, L.GetTypeMetatable("file"))
+	L.Push(ud)
+	L.Push(lua.LNil)
+	return 2
+}
+
+func (container Container) lMkdir(L *lua.LState) int {
+	path := L.CheckString(1)
+	perm := L.CheckInt(2)
+
+	if err := container.FS.MkdirAll(path, os.FileMode(perm)); err != nil {
+		L.Push(lua.LFalse)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+
+	L.Push(lua.LTrue)
+	L.Push(lua.LNil)
+	return 2
+}
+
+func (container Container) lexecute(L *lua.LState) {
+	cmdString := L.CheckString(1)
+
+	cmdSlice := strings.Fields(cmdString)
+}
+
+func (container Container) GetLuaState() error {
+
+	lua.NewState(lua.Options{})
+	return nil
+}