Game clients

When assembling the client, you can go 3 ways:

• Downloading the client from the official Mojang server (by default) + adding a modloader, such as Fabric or Quilt
• Using ready-made clients from mirrors
• Manual assembly

The last option is for advanced users is described in the article Building Minecraft game clients (the information is a little outdated).

Downloading client

Command

downloadclient <version> <client name> <?source type>

Vanilla

downloadclient 1.19.4 TestClient

Fabric

downloadclient 1.19.4 TestClient fabric

Quilt

downloadclient 1.19.4 TestClient quilt

NeoForge

downloadclient 1.19.4 TestClient neoforge

Forge

downloadclient 1.19.4 TestClient forge

Mirror

downloadclient 1.19.4 TestClient mirror

• version - game version or build name from mirror
• client name - the name of the folder where the client will be saved
• source type - source type (optional), default: mojang

Working with the mirrors

To download assemblies from a mirror, you must first find its address in the community and post it in this form:

LauncherServerConfig.hjson

{
    mirrors: [
        "https://example1.com/"
        "https://example2.com/"
    ]
}

Afterwards, you need to specify the format in which the versions are named. This can be done by simply going to the mirror address and looking at the file names on it. The file name is the client name for the command. Accordingly, the source type will be mirror
You can look at the mirror architecture here.

Information:

To install Forge and NeoForge you will need to install the Java JDK

The downloaded client will be placed in the path gameFiles/clients/Client_Name. Here you can place all additional files for the game.

Setting up profile

The profile file is located in the profiles folder with the name of the downloaded client.

profiles/TestClient.json

{
    "configVersion": 0,
    "uuid": "016ed45e-93ba-45d9-972a-7de258ad778c",
    "sortIndex": 0,
    "servers": [
        {
            "hostname": "example.com",
            "title": "Test"
        },
        {
            "ip": "127.0.0.1",
            "port": 25565,
            "title": "Test 2"
        }
    ],
    "javaVersion": 17,
    "version": "1.19.4",
    "clientDir": "Test",
    "assetIndex": "3",
    "libraries": [...],
    "gameJar": "minecraft.jar",
    "mainClass": "net.fabricmc.loader.impl.launch.knot.KnotClient",
    "jvmArgs": [],
    "clientArgs": [],
    "update": ["server.dat"],
    "updateVerify": ["mods/", "config/"],
    "updateExclusions": ["mods/.cache/"],
    "whiteListType": "null"
}

Description of config settings

• uuid - a unique id that can be referenced if needed. Do not change it if you do not understand what it is for
• sortIndex - in what order should the profile be in the Launcher
• ip - game server address to get the number of online players
• port - game server port
• hostname - replaces ip and port with a domain with an SRV record
• title - server name in profile list
• javaVersion - Java version that will be downloaded for the game
• version - game version
• clientDir - name of game folder in gameFiles/clients
• assetIndex - asset version for the game
• libraries - list of libraries that are used
• gameJar - file name to start the game
• mainClass - game start class in gameJar file
• jvmArgs - game launch arguments. Those that are passed to Java
• clientArgs - game launch arguments. Those that are passed to the game
• update - Details here
• updateVerify - Details here
• updateExclusions - Details here
• whiteListType - Not implemented

File synchronization

Synchronization is performed automatically when files are changed. But if necessary, it can be performed using commands:

Synchronization all

syncall

Synchronization profile

syncprofiles

Synchronization gameFiles

syncclients <?Profile name>

Installing mods

To install mods you need to:

1. Go to the path: YOUR_LAUNCHSERVER/gameFiles/clients/CLIENT_NAME/
2. Create a mods folder next to minecraft.jar
3. Upload the necessary modifications to this folder.
4. Installation is complete!