added lua functions from old version of packets

internal/lua/luafunctions.go

@@ -0,0 +1,120 @@
+package lua
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+
+	lua "github.com/yuin/gopher-lua"
+)
+
+func LRemove(L *lua.LState) int {
+	filename := L.CheckString(1)
+
+	err := os.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 LRename(L *lua.LState) int {
+	oldname := L.CheckString(1)
+	newname := L.CheckString(2)
+
+	if err := os.Rename(oldname, newname); err != nil {
+		L.Push(lua.LFalse)
+		L.Push(lua.LString(err.Error()))
+		return 2
+	}
+
+	L.Push(lua.LTrue)
+	return 1
+}
+func LCopy(L *lua.LState) int {
+	oldname := L.CheckString(1)
+	newname := L.CheckString(2)
+
+	if err := copyDir(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 LSymlink(L *lua.LState) int {
+	fileName := L.CheckString(1)
+	destination := L.CheckString(2)
+
+	_ = os.RemoveAll(destination)
+	if err := os.Symlink(fileName, destination); 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 Ljoin(L *lua.LState) int {
+
+	n := L.GetTop()
+	parts := make([]string, 0, n)
+
+	for i := 1; i <= n; i++ {
+		val := L.Get(i)
+		parts = append(parts, val.String())
+	}
+
+	result := filepath.Join(parts...)
+	L.Push(lua.LString(result))
+	return 1
+}
+
+func LMkdir(L *lua.LState) int {
+	path := L.CheckString(1)
+	perm := L.CheckInt(2)
+
+	if err := os.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 LError(L *lua.LState) int {
+	n := L.GetTop()
+	parts := make([]any, 0, n)
+
+	for i := 1; i <= n; i++ {
+		val := L.Get(i)
+		parts = append(parts, val.String())
+	}
+
+	llogger().Panic(parts...)
+	return 0
+}
+
+func LSetEnv(L *lua.LState) int {
+	env := L.CheckString(1)
+	value := L.CheckString(2)
+	os.Setenv(env, value)
+	return 0
+}
+
+func llogger() *log.Logger { return log.New(os.Stderr, "script error: ", 0) }

internal/lua/utils.go

@@ -0,0 +1,95 @@
+package lua
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+)
+
+func copyDir(src string, dest string) error {
+	if stats, err := os.Stat(src); err != nil {
+		return err
+	} else {
+		if stats.IsDir() {
+			files, err := os.ReadDir(src)
+			if err != nil {
+				return err
+			}
+
+			if err := os.MkdirAll(dest, 0o755); err != nil {
+				return err
+			}
+
+			for _, file := range files {
+				if file.IsDir() {
+					copyDir(filepath.Join(src, file.Name()), filepath.Join(dest, file.Name()))
+					continue
+				}
+				srcFile := filepath.Join(src, file.Name())
+
+				f, err := os.Create(filepath.Join(dest, file.Name()))
+				if err != nil {
+					return err
+				}
+				defer f.Close()
+
+				opennedSrcFile, err := os.Open(srcFile)
+				if err != nil {
+					return err
+				}
+				defer opennedSrcFile.Close()
+				if _, err := io.Copy(f, opennedSrcFile); err != nil {
+					return err
+				}
+
+			}
+		} else {
+			if err := copyFile(src, dest); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func copyFile(source string, destination string) error {
+	src, err := os.Open(source)
+	if err != nil {
+		return err
+	}
+	defer src.Close()
+
+	status, err := src.Stat()
+	if err != nil {
+		return err
+	}
+
+	err = os.MkdirAll(filepath.Dir(destination), 0o755)
+	if err != nil {
+		return err
+	}
+
+	dst, err := os.Create(destination)
+	if err != nil {
+		if !os.IsExist(err) {
+			dst, err = os.Open(destination)
+			if err != nil {
+				return err
+			}
+		} else {
+			return err
+		}
+	}
+
+	defer dst.Close()
+	if err := dst.Chmod(status.Mode()); err != nil {
+		return err
+	}
+
+	_, err = io.Copy(dst, src)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}