Updates available reported for Arch/CachyOS when there are none

[valankar]

I was trying to figure out why byobu is reporting updates available on CachyOS, which is basically Arch.

Here is what I could find:

❯ env |grep BYOBU
BYOBU_WINDOW_NAME=-
BYOBU_RUN_DIR=/dev/shm/byobu-valankar-Yr5oyLER

❯ ls -l /dev/shm/byobu-valankar-Yr5oyLER/cache.tmux
.rw-r--r-- 2 valankar 27 Apr 15:20  updates-available
.rw-r--r-- 0 valankar 27 Apr 12:54  updates-available.lock

❯ cat /dev/shm/byobu-valankar-Yr5oyLER/cache.tmux/updates-available
1

❯ ls -l /var/lib/pacman/sync/*.db
.rw-r--r-- 508k root 27 Apr 15:00  /var/lib/pacman/sync/cachyos.db
.rw-r--r-- 120k root 27 Apr 02:13  /var/lib/pacman/sync/core.db
.rw-r--r-- 8.0M root 27 Apr 15:14  /var/lib/pacman/sync/extra.db
.rw-r--r-- 139k root 24 Apr 20:14  /var/lib/pacman/sync/multilib.db

❯ pacman -Sup | grep -vc "^\(::\| \)"
0

❯ sudo pacman -Syu
[sudo] password for valankar:
:: Synchronizing package databases...
 cachyos is up to date
 core is up to date
 extra is up to date
 multilib is up to date
:: Starting full system upgrade...
 there is nothing to do

It still reports 1! in the status bar despite no packages available.

I see the cache is only updated when the DB is newer:

byobu/usr/lib/byobu/updates_available

Line 120 in 34ca6fe

[ "$db" -nt "$mycache" ] && return 0

But it seems the cache is never updated if that is not the case? That seems like it would stay like this forever.