Cross plateform library to have only one instance of a software (based on python's tendo).

package main

import (
	"fmt"
	"time"

	"github.com/allan-simon/go-singleinstance"
)

func main() {
	lockFile, err := singleinstance.CreateLockFile("plop.lock")
	if err != nil {
		fmt.Println("An instance already exists")
		return
	}
	defer lockFile.Close()

	fmt.Println("Sleeping...")
	time.Sleep(10 * time.Second)
	fmt.Println("Done")
}

If you try to launch it twice, the second instance will fail.

For the python library trendo, from which I've shamelessly adapted the code.

Don't be afraid if it says "last commit 2 years ago", this library is made to be small and simple so it's unlikely it changes after some times, however I'm pretty reactive on github overall, so feel free to use issues to ask question, propose patch etc. :)

MIT