Status report for the Unvanquished Nightly Server

[necessarily-equal]

ToDo:

• [x] build and package dependencies as nix flakes
• [x] build and package engine
• [x] build and package assets (I've given up on handling assets in nix)
• [x] seemless rebuild and restarts every 15 minutes (that only restarts if daemon has been rebuilt)
• [ ] ensure server is empty before restarting
• [x] upstream the dependencies to the master branch of each repo
  • [x] Sloth (https://github.com/DaemonEngine/Sloth/pull/9)
  • [x] Crunch (https://github.com/DaemonEngine/crunch/pull/21)
  • [x] NetRadiant (ended up packaging only q3map&co, https://gitlab.com/xonotic/netradiant/-/merge_requests/192)
  • [x] Urcheon (https://github.com/DaemonEngine/Urcheon/pull/41)
• [ ] make navmesh generation correct (@slipher: any idea on how can I make that work?)
• [x] Unvanquished/Unvanquished#1747
• [x] add bots
• [x] add documentation at the top of each file to explain what it does to make the code somewhat possible to maintain by others
• [x] make a repository on gitlab for people to be able to see the code and contribute (https://gitlab.com/afontain/unvanquished-nightly-server)
• [x] have the server report the running versions/commits somehow (https://users.unvanquished.net/~afontain/pkg/nightly/current-versions.txt)
• [ ] have some form of notification for when (if) it eventually stops updating (e.g. the build breaks)
• [ ] have some form of crash report generated
• [ ] be notified when a crash report is generated (how? issue on github?)

[illwieckz]

have some form of notification for when (if) it eventually stops updating (e.g. the build breaks)

maybe we can feed the overmind IRC bot with such notice

[necessarily-equal]

maybe we can feed the overmind IRC bot with such notice

any idea on how to do that?

[illwieckz]

For this:

ensure server is empty before restarting

You can use this script (for example name it isServerEmpty):

#! /usr/bin/env bash

set -e
set -u

if [ -z "${1:-}" ]
then
    echo 'ERROR: missing server address' >&2
    exit 1
fi

data="$(qstat -raw $'\n' -R -unvanquisheds "${1}" | egrep '^B=|^P=')"
player_count="$(echo "${data}" | egrep '^P=' | cut -c3- | sed -e 's/-//g;s/0//g' | wc -c)"
bot_count="$(echo "${data}" | egrep '^B=' | cut -c3- | sed -e 's/-//g' | wc -c)"

if [ "$((${player_count} - ${bot_count}))" = 0 ]
then
    echo "true"
    exit
fi

echo "false"
exit 1

You can use it that way:

./isServerEmpty 172.86.178.34:27961
true

Or this way:

if ./isServerEmpty 172.86.178.34:27961 >/dev/null; then echo "let's do it"; fi
let's do it

On the server you'll probably want to address localhost or 127.0.0.1.

You'll also prefer to have a fixed port. 27961 looks to be basically the “next one” after 27960 which is used by the vanilla server. I would prefer if you use a port that is not in the immediate following of 27960 because we may spawn more vanilla servers if needed (like I did at 0.52.0 release time), so it's better if optional extra servers don't steal the port of the nightly one. For example, what if you set 27959 for the nightly server? Extra servers will never claim this port automatically.

For the script to work you will need qstat: https://github.com/Unity-Technologies/qstat

Note: on the server you can use quakestat -raw $'\n' -R -tremulous "${1}" instead of qstat -raw $'\n' -R -unvanquisheds "${1}" but maybe you'll want to add qstat to your nix stuff and get recent qstat instead.