initial commit

.gitignore

@@ -0,0 +1 @@
+bin/

go.mod

@@ -0,0 +1,3 @@
+module renamedit
+
+go 1.24.1

main.go

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+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+func main() {
+	// Check command line arguments
+	if len(os.Args) != 2 {
+		fmt.Println("Usage: renamedit <directory path>")
+		os.Exit(1)
+	}
+
+	dirPath := os.Args[1]
+
+	// Check if directory exists
+	info, err := os.Stat(dirPath)
+	if err != nil {
+		fmt.Printf("Error: %v\n", err)
+		os.Exit(1)
+	}
+	if !info.IsDir() {
+		fmt.Printf("Error: %s is not a directory\n", dirPath)
+		os.Exit(1)
+	}
+
+	// Get list of files in the directory
+	files, err := os.ReadDir(dirPath)
+	if err != nil {
+		fmt.Printf("Error reading directory: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Create temporary file
+	tmpFile, err := os.CreateTemp("", "rename-*.txt")
+	if err != nil {
+		fmt.Printf("Error creating temporary file: %v\n", err)
+		os.Exit(1)
+	}
+	defer os.Remove(tmpFile.Name())
+
+	// Write filenames to temporary file
+	fileNames := make([]string, 0)
+	for _, file := range files {
+		if !file.IsDir() {
+			fileName := file.Name()
+			fileNames = append(fileNames, fileName)
+			tmpFile.WriteString(fileName + "\n")
+		}
+	}
+	tmpFile.Close()
+
+	// Open temporary file with editor
+	editor := os.Getenv("EDITOR")
+	if editor == "" {
+		editor = "vim" // Default editor
+	}
+
+	cmd := exec.Command(editor, tmpFile.Name())
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	err = cmd.Run()
+	if err != nil {
+		fmt.Printf("Editor error: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Read edited file
+	content, err := os.ReadFile(tmpFile.Name())
+	if err != nil {
+		fmt.Printf("Error reading temporary file: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Parse new filenames
+	scanner := bufio.NewScanner(strings.NewReader(string(content)))
+	var newFileNames []string
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line != "" {
+			newFileNames = append(newFileNames, line)
+		}
+	}
+
+	// Check if the number of files matches
+	if len(newFileNames) != len(fileNames) {
+		fmt.Println("Error: Number of new and old filenames doesn't match")
+		os.Exit(1)
+	}
+
+	// Perform renaming
+	for i, oldName := range fileNames {
+		newName := newFileNames[i]
+		if oldName != newName {
+			oldPath := filepath.Join(dirPath, oldName)
+			newPath := filepath.Join(dirPath, newName)
+
+			err := os.Rename(oldPath, newPath)
+			if err != nil {
+				fmt.Printf("Failed to rename %s to %s: %v\n", oldName, newName, err)
+			} else {
+				fmt.Printf("Renamed: %s -> %s\n", oldName, newName)
+			}
+		}
+	}
+}