Added some comments

main.go

@@ -11,11 +11,13 @@ import (
 )
 
 func main() {
+	// Check for arguments
 	if len(os.Args) < 2 {
 		fmt.Println("Usage: runner <file-or-directory>")
 		os.Exit(1)
 	}
 
+	// Select first argument, and check if it's a file or directory
 	targetPath := os.Args[1]
 
 	info, err := os.Stat(targetPath)
@@ -53,12 +55,14 @@ func main() {
 }
 
 func runCommandsFromFile(filename string, currentDir *string) error {
+	// Try to open the file
 	f, err := os.Open(filename)
 	if err != nil {
 		return fmt.Errorf("Error opening file: %w", err)
 	}
 	defer f.Close()
 
+	// Create a scanner to read the file line by line
 	scanner := bufio.NewScanner(f)
 	for scanner.Scan() {
 		cmdLine := strings.TrimSpace(scanner.Text())
@@ -86,6 +90,7 @@ func runCommandsFromFile(filename string, currentDir *string) error {
 			continue
 		}
 
+		// Execute the command
 		fmt.Println(">>> Executing:", cmdLine)
 		cmd := exec.Command("bash", "-c", cmdLine)
 		cmd.Stdout = os.Stdout