Hostify

Hostify is a module that help us to work with the hosts file of our operating system.

It supports both a CLI tool and a module you can use in your own project.

NOTE: library in progress. Please use with caution and report any issue on here: https://github.com/eridem/hostify/issues

CLI tool operations

# Usage 
hostify [COMMAND] [OPTIONS]
 
# For help 
hostify --help
hostify [COMMAND] --help

Command	Description	Example
list	Show all entries in the host file	hostify list
list --ipFilterExp "REGEXP"	Show entries which IPs match with RegExp	hostify list --ipFilterExp ".*\.255"
list --hostFilterExp "REGEXP"	Show entries which Host match with RegExp	hostify list --hostFilterExp ".*tracking.*"
list --ipFilterExp "REGEXP" --hostFilterExp "REGEXP"	Show entries which IP and Host match with both each RegExp	hostify list --ipFilterExp "0.0.0.0" --hostFilterExp ".*tracking.*"
add --ip "IP" --host "HOST" [--comment "COMMENT"]	Add a single entry to the hosts file	hostify add --ip "0.0.0.0" --host "tracking.localhost" --comment "Tracking entry"
delete --ipFilterExp "REGEXP" [--what-if]	Delete entries which IPs match with RegExp	hostify delete --ipFilterExp "127.0.0.\d+"
delete --hostFilterExp "REGEXP" [--what-if]	Delete entries which Host match with RegExp	hostify delete --hostFilterExp ".*project\.local"

Special options

Option	Description	Example
--path	Specify path of another hosts file	hostify list --path ./my-hosts.txt

Module interface

Import module with:

const hostify = require('hostify').operations

List

hostify.list(options): <Array>{ ip: string, host: string }`

Show entries in the host file.

Option	Model	Default
filterIpFn	filterIpFn: (val: string) => boolean	(v) => true
filterHostFn	filterHostFn: (val: string) => boolean	(v) => true
path	path: string	OS hosts path

const options = {
  filterIpFn: (val) => val.endsWith('.255'),       // Filter IPs
  filterHostFn: (val) => val.contains('tracking')  // Filter Hosts
  // path: './my-hosts-file.txt'                   // Hosts file
}
 
const entries = hostify.list(options)
 
entries.forEach(entry => console.log(entry.ip, entry.host, entry.comment))

Add

hostify.add(options): <Array>{ ip: string, host: string }

Add entries in the host file.

Option	Model	Default
entries	<Array>{ ip: string, host: string, comment: string }	null
path	path: string	OS hosts path

const options = {
  entries: [                                       // Entries to add
    { ip: '0.0.0.0', host: 'ad.localhost' },
    { ip: '0.0.0.0', host: 'tracking.localhost', comment: 'Track entry' }
  ],
  // path: './my-hosts-file.txt'                   // Hosts file
}
 
const entries = hostify.add(options)
 
entries.forEach(entry => console.log(entry.ip, entry.host, entry.comment))

Delete

hostify.delete(options): <Array>{ ip: string, host: string }

Delete entries in the host file.

Option	Model	Default
filterIpFn	filterIpFn: (val: string) => boolean	(v) => true
filterHostFn	filterHostFn: (val: string) => boolean	(v) => true
whatIf	whatIf: boolean	false
path	path: string	OS hosts path

const options = {
  filterIpFn: (val) => val.endsWith('.255'),       // Filter IPs
  filterHostFn: (val) => val.contains('tracking'), // Filter Hosts
  whatIf: true                                     // Do not execute delete operation, only obtain results
  // path: './my-hosts-file.txt'                   // Hosts file
}
 
const entries = hostify.delete(options)
 
entries.forEach(entry => console.log(entry.ip, entry.host, entry.comment))