Weather MCP Server

Okay, here's an example of creating an MCP (Minecraft Coder Pack) server setup. This focuses on the core steps and assumes you have some basic familiarity with command lines and file management. Keep in mind that MCP is primarily used for *mod development*, not for running a standard Minecraft server. This setup is to allow you to decompile, modify, and recompile the Minecraft server code. **Important Considerations:** * **MCP is for Mod Development, Not Server Hosting:** MCP is designed to let you *modify* the Minecraft code. It's not a replacement for a standard Minecraft server (like the official server.jar or a Spigot/Paper server). You'll use MCP to change the code, then build a modified server jar. * **Minecraft Version Compatibility:** MCP is tied to specific Minecraft versions. You *must* use the correct MCP version for the Minecraft version you want to work with. Using the wrong versions will lead to errors. * **Legality:** You are allowed to modify the Minecraft code for personal use and mod development. Distributing the *original* Minecraft code (even modified) is generally not allowed. You can distribute your *mod* (the changes you made). * **Complexity:** Mod development with MCP is a complex process. This example provides a basic outline. Expect to encounter challenges and consult the MCP documentation and community resources. **Steps (Simplified):** 1. **Download MCP:** * Go to a reliable source for MCP downloads. A common place is often linked from the MinecraftForge forums or related modding communities. Search for "MCP [Minecraft Version]" (e.g., "MCP 1.19.2"). Make sure you download the correct version for the Minecraft version you want to mod. * Extract the downloaded MCP archive (usually a `.zip` or `.tar.gz` file) to a directory on your computer. For example, `C:\mcp` (Windows) or `/home/user/mcp` (Linux/macOS). This directory will be your MCP working directory. 2. **Download the Minecraft Server Jar:** * Download the official Minecraft server `.jar` file from the Minecraft website ([https://www.minecraft.net/en-us/download/server](https://www.minecraft.net/en-us/download/server)). Make sure it's the same version as the MCP version you downloaded. * Place the server `.jar` file in the `jars` subdirectory within your MCP directory. For example, `C:\mcp\jars\server.jar`. Rename the server jar to `minecraft_server.jar`. 3. **Configure MCP ( `mcp.cfg` ):** * Open the `mcp.cfg` file in your MCP directory with a text editor. * **Important:** Verify that the `MinecraftVersion` setting in `mcp.cfg` matches the Minecraft version of your server jar. If it doesn't, change it. For example: ``` MinecraftVersion = 1.19.2 ``` * You might need to adjust other settings in `mcp.cfg` depending on your specific needs and the MCP version. Refer to the MCP documentation for details. 4. **Decompile Minecraft:** * Open a command prompt or terminal. * Navigate to your MCP directory using the `cd` command. For example: ```bash cd C:\mcp (Windows) cd /home/user/mcp (Linux/macOS) ``` * Run the `decompile.sh` (Linux/macOS) or `decompile.bat` (Windows) script. This will decompile the Minecraft server code. ```bash ./decompile.sh (Linux/macOS) decompile.bat (Windows) ``` * **This step takes a significant amount of time (minutes to hours), depending on your computer and the Minecraft version.** Be patient. Watch the output in the command prompt/terminal for any errors. If you encounter errors, carefully read the error messages and consult the MCP documentation or online forums for solutions. Common errors are related to incorrect Java versions or missing dependencies. 5. **Understanding the Decompiled Code:** * After successful decompilation, the decompiled source code will be located in the `src/minecraft_server` directory within your MCP directory. * The code is organized into packages and classes, mirroring the structure of the original Minecraft code. * **Important:** The decompiled code is often obfuscated (variable and method names are meaningless). MCP uses mappings (stored in `.csv` files) to deobfuscate the code, making it more readable. 6. **Modifying the Code (Example):** * Open the `src/minecraft_server` directory in your IDE (Integrated Development Environment) like Eclipse or IntelliJ IDEA. You'll need to configure your IDE to use the MCP project structure. This usually involves creating a new project and importing the `src/minecraft_server` directory as the source folder. * **Example:** Let's say you want to change the default message that appears when a player joins the server. You would need to find the relevant class and method that handles player joining and modify the string that is sent to the player. This requires understanding the Minecraft server code. * **Important:** Make small, incremental changes and test frequently. It's easy to introduce errors that can prevent the server from starting or cause unexpected behavior. 7. **Recompiling and Reobfuscating:** * After making your changes, you need to recompile the code and reobfuscate it (convert it back to the original obfuscated form). * In your command prompt/terminal (still in the MCP directory), run the `recompile.sh` (Linux/macOS) or `recompile.bat` (Windows) script. ```bash ./recompile.sh (Linux/macOS) recompile.bat (Windows) ``` * If the recompilation is successful, run the `reobfuscate.sh` (Linux/macOS) or `reobfuscate.bat` (Windows) script. ```bash ./reobfuscate.sh (Linux/macOS) reobfuscate.bat (Windows) ``` * These steps will create a new, modified server `.jar` file in the `reobf/minecraft_server.jar` directory. 8. **Testing Your Modified Server:** * Copy the `reobf/minecraft_server.jar` file to a new directory where you want to run your modified server. * Create an `eula.txt` file in that directory and set `eula=true`. * Run the modified server jar: ```bash java -jar minecraft_server.jar ``` * Connect to your server using the Minecraft client and test your changes. **Example `mcp.cfg` (Illustrative):** ``` # Configuration file for MCP # Minecraft Version MinecraftVersion = 1.19.2 # Java location # If not set, MCP will try to find it in your PATH #JavaDir = C:\Program Files\Java\jdk1.8.0_201 # Options for the decompile process Decompile = true Recompile = true Reobfuscate = true # Location of the Minecraft server jar ServerJar = jars/minecraft_server.jar # Location of the Minecraft client jar (optional) ClientJar = jars/minecraft_client.jar # Location of the mappings #Mappings = conf/server.srg # Output directories OutputDir = bin ReobfDir = reobf SourceDir = src # Logging level (DEBUG, INFO, WARN, ERROR) LogLevel = INFO ``` **Chinese Translation of Key Terms:** * **MCP (Minecraft Coder Pack):** Minecraft 代码包 (Minecraft Dàimǎ Bāo) * **Decompile:** 反编译 (Fǎnbiānyì) * **Recompile:** 重新编译 (Chóngxīn Biānyì) * **Reobfuscate:** 重新混淆 (Chóngxīn Hùnxiáo) * **Server Jar:** 服务器 Jar 文件 (Fúwùqì Jar Wénjiàn) * **Mappings:** 映射 (Yìngshè) * **Source Code:** 源代码 (Yuán Dàimǎ) * **Mod:** 模组 (Mózǔ) **Important Notes and Troubleshooting:** * **Java Version:** MCP often requires a specific Java version (usually Java 8 or Java 17, depending on the Minecraft version). Make sure you have the correct Java Development Kit (JDK) installed and that your `JAVA_HOME` environment variable is set correctly. The `mcp.cfg` file may have a `JavaDir` setting you need to adjust. * **Errors During Decompilation/Recompilation:** Carefully read the error messages. Common causes include: * Incorrect Java version * Missing dependencies * Corrupted server jar file * Incorrect MCP version for the Minecraft version * **IDE Setup:** Configuring your IDE (Eclipse, IntelliJ IDEA) correctly is crucial for mod development. Refer to the MCP documentation and tutorials for instructions on setting up your IDE. * **MCP Documentation:** The official MCP documentation (if available for your version) is your best resource for detailed information and troubleshooting. * **Community Forums:** The MinecraftForge forums and other modding communities are excellent places to ask questions and get help from experienced modders. This is a simplified example. Mod development with MCP is a complex and challenging process. Be prepared to spend time learning and troubleshooting. Good luck!