The first part of hosting a Horizon server with one small program
(docs/server.md). horizon-server is a new 1.3 MB binary with no window,
GPU, audio or controller code; it runs the game headless
(horizon-client --dedicated) as its engine.
- horizon-server-files: server.properties, eula.txt and the user lists,
moved out of horizon-client unchanged so both programs share vanilla's
exact reading and writing; horizon_client::server re-exports it.
- server.toml: typed settings for what owners change, [properties] for
any other vanilla key, vanilla 26.3's defaults (a test checks them
against ServerProperties). It is written into server.properties before
every start; keys the game changes there itself (/whitelist on) are
copied back afterwards, keeping the owner's comments (toml_edit).
`import` turns a vanilla server.properties into server.toml.
- init: the EULA (only a yes writes eula=true), world, seed, port (checked
free), whitelist and first operator; every question has a flag, so it
also runs unattended.
- run: the console on stdin, a clean `stop` on Ctrl-C, SIGTERM or SIGHUP
(the game runs in its own process group), and a restart when the game
crashes: 5 s, doubling to 5 min, giving up after 5 crashes in 10 min.
One supervisor per folder (a file lock).
- op, deop and whitelist for a stopped server, with vanilla's messages.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie
9d21209ae8