File push with ..-ending src behaves unexpectedly

[ppepos]

Required information

• Distribution: Arch
• Distribution version: lol
• The output of "incus info" or if that fails:
  • Kernel version: 6.13.6-arch1-1
  • LXC version: 6.0.3-1
  • Incus version: 6.10.1
  • Storage backend in use: btrfs

Issue description

Pushing a directory ending in .. does not behave as I would expect it to. I would expect the following to move the parent directory inside the /opt/target directory but it insteads copies it to the /opt directory.

incus file push -r .. /opt/target

Steps to reproduce

set -x

mkdir -p dir
touch dir/a
incus launch images:ubuntu/24.04 u1
incus launch images:ubuntu/24.04 u2

incus exec u1 -- mkdir -p /opt/target
incus file push -r dir u1/opt/target/.
incus exec u1 -- find /opt

incus exec u2 -- mkdir -p /opt/target
cd dir/
incus file push -r .. u2/opt/target/.
cd ../
incus exec u2 -- find /opt

incus rm u1 --force
incus rm u2 --force

Although not equivalent, in u2, I believe dir should be inside target but it is instead at /opt/dir.

I am not certain if this will be considered a bug or not but since I hit it and had to fiddle a bit to find the issue, I figured I'd let our benevolent dictators decide. ;)

Thanks.

PS: The issue template is not working anymore, github did you dirty.