`omc upgrade` fails with "invalid cross-device link"

[palonsoro]

On a system with the following characteristics:

• Linux (Fedora 41) on x86-64
• /tmp folder is on a different mount point than omc installation folder (omc is installed in ~/bin, /tmp is a tmpfs).

The following error happens:

rename /tmp/omcExecutable_3663917093.tmp /home/someuser/bin/omc: invalid cross-device link

As per what I could confirm with a quick strace, the os.Rename call used in #177 results on a renameat syscall in Linux:

424907 12:24:49.433105 renameat(AT_FDCWD</home/someuser>, "/tmp/omcExecutable_3663917093.tmp", AT_FDCWD</home/someuser>, "/home/someuser/bin/omc") = -1 EXDEV (Invalid cross-device link) <0.000016>

And as per what man renameat says, it is required that they are in the same mount point.

Not sure what would the best approach, maybe copying and deleting instead of renaming.