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

internal/build/utils.go

@@ -0,0 +1,79 @@
+package build
+
+import (
+	"io"
+	"path/filepath"
+
+	"github.com/spf13/afero"
+)
+
+func (container Container) copyContainer(src string, dest string) error {
+	stats, err := container.FS.Stat(src)
+	if err != nil {
+		return err
+	}
+
+	if stats.IsDir() {
+		files, err := afero.ReadDir(container.FS, src)
+		if err != nil {
+			return err
+		}
+
+		if err := container.FS.MkdirAll(dest, 0755); err != nil {
+			return err
+		}
+
+		for _, file := range files {
+			srcPath := filepath.Join(src, file.Name())
+			destPath := filepath.Join(dest, file.Name())
+
+			if file.IsDir() {
+				if err := container.CopyHostToContainer(srcPath, destPath); err != nil {
+					return err
+				}
+				continue
+			}
+
+			if err := container.copySingleFileLtoL(srcPath, destPath); err != nil {
+				return err
+			}
+		}
+	} else {
+		if err := container.copySingleFileLtoL(src, dest); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (container Container) copySingleFileLtoL(source string, destination string) error {
+	src, err := container.FS.Open(source)
+	if err != nil {
+		return err
+	}
+	defer src.Close()
+
+	stats, err := src.Stat()
+	if err != nil {
+		return err
+	}
+	if err := container.FS.MkdirAll(filepath.Dir(destination), 0755); err != nil {
+		return err
+	}
+	dst, err := container.FS.Create(destination)
+	if err != nil {
+		return err
+	}
+	defer dst.Close()
+
+	if _, err := io.Copy(dst, src); err != nil {
+		return err
+	}
+
+	if err := container.FS.Chmod(destination, stats.Mode()); err != nil {
+		return err
+	}
+
+	return nil
+}