bridgehead/lib/update-bridgehead.sh

#!/bin/bash
source lib/functions.sh

log "INFO" "Checking for updates of services"

# Check git updates
for DIR in /etc/bridgehead $(pwd); do
  old_git_hash="$(git -C $DIR rev-parse --verify HEAD)"
  git -C $DIR fetch 2>&1
  git -C $DIR pull 2>&1
  git -C $DIR remote -v
  new_git_hash="$(git -C $DIR rev-parse --verify HEAD)"
  git_updated="false"
  if [ "$old_git_hash" != "$new_git_hash" ]; then
    log "INFO" "Updated git repository in ${DIR} from commit $old_git_hash to $new_git_hash"
    # NOTE: Link generation doesn't work on repositories placed at an self-hosted instance of bitbucket.
    # See: https://community.atlassian.com/t5/Bitbucket-questions/BitBucket-4-14-diff-between-any-two-commits/qaq-p/632974
    if [ "$(git -C $DIR remote get-url origin | grep "github.com")" ]; then
      log "INFO" "You can review all changes on the repository with https://github.com/samply/bridgehead/compare/$old_git_hash...$new_git_hash"
    fi
    git_updated="true"
  fi
done

# Check docker updates
docker_updated="false"
for IMAGE in $(docker ps --filter "name=bridgehead" --format {{.Image}}); do
  log "INFO" "Checking for Updates of Image: $IMAGE"
  if docker pull $IMAGE | grep "Downloaded newer image"; then
    log "INFO" "$IMAGE updated."
    docker_updated="true"
  fi
done

# If anything is updated, restart service
if [ $git_updated = "true" ] || [ $docker_updated = "true" ]; then
  log "INFO" "Due to previous updates now restarting bridgehead"
  systemctl restart 'bridgehead@*'
fi
log "INFO" "checking updates finished"
exit 0

# TODO: Print last commit explicit