bazzite/system_files/desktop/shared/usr/libexec/ublue-motd

#!/usr/bin/bash
escape() {
	sed 's/[&/\]/\\&/g' <<< "$1"
}

TIP_FILE=$(ls "/usr/share/ublue-os/motd/tips/"*".md" | shuf -n 1)
if [[ -f "$TIP_FILE" ]]; then
	IMAGE_INFO="/usr/share/ublue-os/image-info.json"
	IMAGE_NAME=$(jq -r '."image-name"' < $IMAGE_INFO)
	IMAGE_NAME_ESCAPED=$(escape "$IMAGE_NAME")
	IMAGE_BRANCH=$(jq -r '."image-branch"' < $IMAGE_INFO)
	IMAGE_BRANCH_ESCAPED=$(escape "$IMAGE_BRANCH")
	TIP="󰋼 $(shuf -n 1 "$TIP_FILE")"

	IMAGE_DATE=$(rpm-ostree status --booted | sed -n 's/.*Timestamp: \(.*\)/\1/p')
	IMAGE_DATE_SECONDS=$(date -d "$IMAGE_DATE" +%s)
	CURRENT_SECONDS=$(date +%s)
	DIFFERENCE=$((CURRENT_SECONDS - IMAGE_DATE_SECONDS))
	MONTH=$((30 * 24 * 60 * 60))
	if [ "$DIFFERENCE" -ge "$MONTH" ]; then
		TIP='# 󰇻 Your current image is over 1 month old, run `ujust update`'
	fi

	TIP_ESCAPED=$(escape "$TIP")

	sed -e "s/%IMAGE_NAME%/$IMAGE_NAME_ESCAPED/g" -e "s/%IMAGE_BRANCH%/$IMAGE_BRANCH_ESCAPED/g" -e "s/%TIP%/$TIP_ESCAPED/g" /usr/share/ublue-os/motd/bazzite.md | tr '~' '\n' | /usr/bin/glow -s auto -
fi