How can I implement file locking in Go?

How can I implement file locking in Go?

You can use the flock package in Go to implement file locking. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

package main

import (
    "fmt"
    "os"
    "github.com/gofrs/flock"
)

func main() {
    fileLock := flock.New("myfile.txt")
    locked, err := fileLock.TryLock()
    if err != nil {
        fmt.Println("Error locking file:", err)
        return
    }
    if locked {
        fmt.Println("File locked successfully!")
        // Perform file operations here
        fileLock.Unlock()
    } else {
        fmt.Println("File is already locked.")
    }
}

This code tries to lock myfile.txt. If successful, you can perform your file operations.

What happens if the file is already locked?

If the file is already locked, the TryLock() method will return false, and you can handle that case accordingly in your code.