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nix-packages/minecraft/papermc/default.nix

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{
stdenvNoCC,
openjdk_headless,
callPackage,
lib,
writeScript,
}: let
paperJar = callPackage ./jar.nix {};
versionInfo = builtins.fromJSON (builtins.readFile ./paper.json);
in
stdenvNoCC.mkDerivation {
preferLocalBuild = true;
pname = "paper";
version = "${versionInfo.version}.${toString versionInfo.build}";
dontUnpack = true;
dontConfigure = true;
buildPhase = ''
cat > minecraft-server << EOF
#!/bin/sh
exec ${openjdk_headless}/bin/java \$@ -jar $out/share/papermc/papermc.jar nogui
'';
installPhase = ''
mkdir -p $out/share/papermc
ln -s ${paperJar} $out/share/papermc/papermc.jar
install -Dm555 -t $out/bin minecraft-server
'';
meta = {
description = "High performance minecraft server";
# This is a fun one because while papermcs patches are released under the gpl, they apply patches to a proprietary binary which they then execute, so
license = lib.licenses.gpl3;
unfree = true;
};
passthru.updateScript = writeScript "update-paper" '' #! /usr/bin/env nix-shell
#! nix-shell -i bash -p curl jq
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curl -L https://papermc.io/api/v2/projects/paper/versions/1.19.3/builds | jq '{"version":.version, "build":.builds[-1].build, "name":.builds[-1].downloads.application.name, "sha256":.builds[-1].downloads.application.sha256}' > minecraft/papermc/paper.json
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'';
}