IPv6 connection addresses are invalid, cannot connect via ssh #245
Description
Overview of the Issue
Packer cannot connect to hosts using an ipv6 addresses, The format for the connection address is invalid.
The current construction of the connection address is a simple: fmt.Sprintf("%s:%d", host, port) but this does not work for ipv6, as the host needs to be wrapped between brackets when using ipv6.
2a01:4f9:c012:e095::1:22: invalid[2a01:4f9:c012:e095::1]:22: valid
I'll open a Pull Request.
Reproduction Steps
Try to run a build against an ipv6 only host.
Packer Plugin SDK version
Current main branch: 1a2b341
Operating system and Environment details
Linux, probably also windows.
Log Fragments and crash.log files
==> hcloud.example: Waiting for SSH to become available...
2024/06/06 10:00:10 packer-plugin-hcloud_v1.5.1_x5.0_linux_amd64 plugin: 2024/06/06 10:00:10 [DEBUG] TCP connection to SSH ip/port failed: dial tcp: address 2a01:4f9:c012:e095::1:22: too many colons in address
2024/06/06 10:00:15 packer-plugin-hcloud_v1.5.1_x5.0_linux_amd64 plugin: 2024/06/06 10:00:15 [DEBUG] TCP connection to SSH ip/port failed: dial tcp: address 2a01:4f9:c012:e095::1:22: too many colons in address
2024/06/06 10:00:20 packer-plugin-hcloud_v1.5.1_x5.0_linux_amd64 plugin: 2024/06/06 10:00:20 [DEBUG] TCP connection to SSH ip/port failed: dial tcp: address 2a01:4f9:c012:e095::1:22: too many colons in address
2024/06/06 10:00:25 packer-plugin-hcloud_v1.5.1_x5.0_linux_amd64 plugin: 2024/06/06 10:00:25 [DEBUG] TCP connection to SSH ip/port failed: dial tcp: address 2a01:4f9:c012:e095::1:22: too many colons in address