wg create: infinite loop when file exists #4665
Description
Describe the bug
When specifying config for wireguard tunnel, if the file exists, the command enters an endless loop that can not be interrupted or killed.
touch wgvpn.conf
fly wg create personal ams wgvpn wgvpn.conf
fly version
flyctl v0.3.217 linux/amd64 Commit: a6da01f BuildDate: 2025-11-14T20:30:19Z
** Command output: **
$ fly wg create personal ams wgvpn /tmp
Creating WireGuard peer "wgvpn" in region "ams" for organization personal
!!!! WARNING: Output includes private key. Private keys cannot be recovered !!!!
!!!! after creating the peer; if you lose the key, you'll need to remove !!!!
!!!! and re-add the peering connection. !!!!
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file exists
Can't create '/tmp': open /tmp: file existsThere is a one liner fix to return the error here.
But the code looks a bit messy, so I decided to make it more readable first #4664