Export CHROME_WRAPPER environment variable inside AppImage for correct KeePassXC interaction

[pezeee001]

Context: KeePassXC is a self-hosted password manager with browser integration like autotyping. I've been using Ungoogled Chromium native with KeePassXC AppImage for some time now but UC OBS stalled at 112 and some sites started to break so I've decided to migrate to this AppImage. Everything works fine except KeePassXC keeps focusing every 10 seconds or so and browser integration also doesn't work.

After extracting both AppImages, I found out that KeePassXC AppRun checks if CHROME_WRAPPER env variable is set, which then launches KeePassXC-proxy that handles native messaging, and if it isn't, launches KeePassXC normally, which caused the app to focus:

# KeePassXC AppRun

if [ "$1" == "cli" ]; then
    shift
    exec keepassxc-cli "$@"
elif [ "$1" == "proxy" ]; then
    shift
    exec keepassxc-proxy "$@"
elif [ -v CHROME_WRAPPER ] || [ -v MOZ_LAUNCHED_CHILD ]; then
    exec keepassxc-proxy "$@"
else
    exec keepassxc "$@"
fi

I've managed to fix the issue by repacking this AppImage and adding this to AppRun code:

export CHROME_WRAPPER="$(readlink -f "${0}")"

It's based on Chromium source but I think CHROME_WRAPPER value doesn't matter in this case.