Initial commit

internal/osutils/move.go

@@ -0,0 +1,110 @@
+/*
+ * LURE - Linux User REpository
+ * Copyright (C) 2023 Elara Musayelyan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package osutils
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+)
+
+// Move attempts to use os.Rename and if that fails (such as for a cross-device move),
+// it instead copies the source to the destination and then removes the source.
+func Move(sourcePath, destPath string) error {
+	// Try to rename the source to the destination
+	err := os.Rename(sourcePath, destPath)
+	if err == nil {
+		return nil // Successful move
+	}
+
+	// Rename failed, so copy the source to the destination
+	err = copyDirOrFile(sourcePath, destPath)
+	if err != nil {
+		return err
+	}
+
+	// Copy successful, remove the original source
+	err = os.RemoveAll(sourcePath)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func copyDirOrFile(sourcePath, destPath string) error {
+	sourceInfo, err := os.Stat(sourcePath)
+	if err != nil {
+		return err
+	}
+
+	if sourceInfo.IsDir() {
+		return copyDir(sourcePath, destPath, sourceInfo)
+	} else if sourceInfo.Mode().IsRegular() {
+		return copyFile(sourcePath, destPath, sourceInfo)
+	} else {
+		// ignore non-regular files
+		return nil
+	}
+}
+
+func copyDir(sourcePath, destPath string, sourceInfo os.FileInfo) error {
+	err := os.MkdirAll(destPath, sourceInfo.Mode())
+	if err != nil {
+		return err
+	}
+
+	entries, err := os.ReadDir(sourcePath)
+	if err != nil {
+		return err
+	}
+
+	for _, entry := range entries {
+		sourceEntry := filepath.Join(sourcePath, entry.Name())
+		destEntry := filepath.Join(destPath, entry.Name())
+
+		err = copyDirOrFile(sourceEntry, destEntry)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func copyFile(sourcePath, destPath string, sourceInfo os.FileInfo) error {
+	sourceFile, err := os.Open(sourcePath)
+	if err != nil {
+		return err
+	}
+	defer sourceFile.Close()
+
+	destFile, err := os.OpenFile(destPath, os.O_CREATE|os.O_TRUNC|os.O_RDWR, sourceInfo.Mode())
+	if err != nil {
+		return err
+	}
+	defer destFile.Close()
+
+	_, err = io.Copy(destFile, sourceFile)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}