Go package for working with a system's hostsfile

Reads the content of a file in the hosts format into go structs for easy manipulation in go programs. When all changes are complete you can Flush the hosts file back to disk to save your changes. Supports an indexing system on both ips and hosts for quick management of large hosts files.

Simple Usage

Simple usage reading in your system's hosts file and adding an entry for the ip 192.168.1.1 and the host my-hostname

package main

import (
	"log"
	
	"github.com/goodhosts/hostsfile"
)

func main() {
    hosts, err := hostsfile.NewHosts()
    if err != nil {
        log.Fatal(err.Error())
    }
    if err := hosts.Add("192.168.1.1", "my-hostname"); err != nil {
        log.Fatal(err.Error())
    }
    if err := hosts.Flush(); err != nil {
        log.Fatal(err.Error())
    }
}

Other Usage

Read in a hosts file from a custom location which is not the system default, this is useful for tests or systems with non-standard hosts file locations.

hosts, err := hostsfile.NewCustomHosts("./my-custom-hostsfile")

Use Add to put an ip and host combination in the hosts file

err := hosts.Add("192.168.1.1", "my-hostname")

Add is variadic and can take multiple hosts to add for the same ip

err := hosts.Add("192.168.1.1", "my-hostname", "another-hostname")

Use Remove to drop an ip and host combination from the hosts file

err := hosts.Remove("192.168.1.1", "my-hostname")

Remove is variadic and can take multiple hosts to remove from the same ip

err := hosts.Remove("192.168.1.1", "my-hostname", "another-hostname")

Flush the hosts file changes back to disk

err := hosts.Flush()