Support for IPv6 addresses

[joel0]

wait-for-it mangles IPv6 address literals by considering the first : as the end of the host field.

$ ./wait-for-it.sh "[2607:f8b0:400e:c08::66]:80"
wait-for-it.sh: waiting 15 seconds for [2607:f8b0
wait-for-it.sh: timeout occurred after waiting 15 seconds for [2607:f8b0

$ ./wait-for-it.sh "[::1]"
wait-for-it.sh: waiting 15 seconds for [:1]
wait-for-it.sh: timeout occurred after waiting 15 seconds for [:1]

[atkrad]

Hey @joel0
You can use the Wait4X, it supports IPV6:

wait4x tcp '[::1]:3306'

[juliaszone]

Sadly this script is outdated. I'm looking into updating it for IPv6 using RFCs. No guarantees tho, as I have limited mental capacity ATM.

[juliaszone]

A very easy fix idea: splitting by the last colon matched, not the first. That should do the trick.
Text representation can be found here: https://datatracker.ietf.org/doc/html/rfc2373#section-2.2
Maybe it's better to add a regex checking for Domain/IPv6/IPv4. I'll also see about the connections that the script makes, to make sure it follows happy eyeballs for domains: https://datatracker.ietf.org/doc/html/rfc8305
netcat to my knowledge is very sticky to one protocol unless specified differently. Maybe I'd check both IPv6 and IPv4 if a domain resolves to both.