bazzite/system_files/deck/usr/bin/steamos-update

#!/bin/bash

if command -v ublue-update > /dev/null; then
  if [ "$1" == "check" ]; then
    if [ -f '/tmp/upgrade-installed' ]; then
      exit 7 # Upgrade already installed
    else
      # Check system state
      ublue-update --check
      if [ $? -eq 0 ]; then
        # Perform connectivity check
        wget -q --spider https://github.com
        if [ $? -eq 0 ]; then
          # Compare installation digest to latest image
          IMAGE=$(rpm-ostree status | grep -m1 ghcr | sed 's/^.*ghcr/ghcr/')
          CURRENT=$(rpm-ostree status | grep -m1 Digest | tr -d '[:space:]' | sed 's/'Digest:'//g')
          LATEST=$(skopeo inspect docker://${IMAGE} | jq '.Digest' | tr -d '"')
          if [ ${CURRENT} == ${LATEST} ]; then
            exit 7 # Up to date
          else
            exit 0 # Upgrade available
          fi
        else
          exit 7 # Connectivity check failed
        fi
      else
        exit 7 # System in use
      fi
    fi
  elif [ "$1" == "--supports-duplicate-detection" ]; then
    exit 0
  else
    # Fake upgrade progress bar
    fake_progress() {
      local value=0
      while read -r line; do
        if [ ${value} -lt '100' ]; then
          echo ${value}'%'
          value=$(( value + 3 ))
        fi
      done
      echo 100%
    }
    upgrade() {
      # Pull exit code from ublue-update
      ublue-update --force
      echo $? > /tmp/upgrade-check
    }
    upgrade | fake_progress
    # Check if upgrade failed
    UPGRADE_CHECK=/tmp/upgrade-check
    rm /tmp/upgrade-check
    if [ ${UPGRADE_CHECK} -eq 0 ]; then
      touch /tmp/upgrade-installed
    else
      exit 0 # Upgrade failed
    fi
  fi
else
  exit 7 # ublue-update not installed
fi