Add version command

connector/pom.xml

@@ -164,6 +164,7 @@
                     <skipPoms>false</skipPoms>
                     <excludeProperties>
                         <excludeProperty>git.user.*</excludeProperty>
+                        <excludeProperty>git.commit.user.*</excludeProperty>
                     </excludeProperties>
                     <commitIdGenerationMode>flat</commitIdGenerationMode>
                     <gitDescribe>

connector/src/main/java/org/geysermc/connector/command/CommandManager.java

@@ -49,6 +49,7 @@ public CommandManager(GeyserConnector connector) {
         registerCommand(new ReloadCommand(connector, "reload", "Reloads the Geyser configurations. Kicks all players when used!", "geyser.command.reload"));
         registerCommand(new StopCommand(connector, "stop", "Shuts down Geyser.", "geyser.command.stop"));
         registerCommand(new OffhandCommand(connector, "offhand", "Puts an items in your offhand.", "geyser.command.offhand"));
+        registerCommand(new VersionCommand(connector, "version", "Shows the current geyser version and checks for updates.", "geyser.command.version"));
     }
 
     public void registerCommand(GeyserCommand command) {

connector/src/main/java/org/geysermc/connector/command/defaults/VersionCommand.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2019-2020 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.connector.command.defaults;
+
+import com.github.steveice10.mc.protocol.MinecraftConstants;
+import org.geysermc.connector.GeyserConnector;
+import org.geysermc.connector.command.CommandSender;
+import org.geysermc.connector.command.GeyserCommand;
+import org.geysermc.connector.utils.FileUtils;
+import org.geysermc.connector.utils.WebUtils;
+
+import java.util.Properties;
+
+public class VersionCommand extends GeyserCommand {
+
+    public GeyserConnector connector;
+
+    public VersionCommand(GeyserConnector connector, String name, String description, String permission) {
+        super(name, description, permission);
+        this.connector = connector;
+    }
+
+    @Override
+    public void execute(CommandSender sender, String[] args) {
+        sender.sendMessage("This server is running " + GeyserConnector.NAME + " version " + GeyserConnector.VERSION + " (Java: " + MinecraftConstants.GAME_VERSION + ", Bedrock: " + GeyserConnector.BEDROCK_PACKET_CODEC.getMinecraftVersion() + ")");
+
+        // Disable update checking in dev mode
+        if (!GeyserConnector.VERSION.equals("DEV")) {
+            sender.sendMessage("Checking version, please wait...");
+            try {
+                Properties gitProp = new Properties();
+                gitProp.load(FileUtils.getResource("git.properties"));
+
+                String buildXML = WebUtils.getBody("https://ci.nukkitx.com/job/GeyserMC/job/Geyser/job/" + gitProp.getProperty("git.branch") + "/lastSuccessfulBuild/api/xml?xpath=//master/buildNumber");
+                if (buildXML.startsWith("<buildNumber>")) {
+                    int latestBuildNum = Integer.parseInt(buildXML.replaceAll("<(\\\\)?buildNumber>", ""));
+                    int buildNum = Integer.parseInt(gitProp.getProperty("git.build.number"));
+                    if (latestBuildNum != buildNum) {
+                        sender.sendMessage("No updates available");
+                    } else {
+                        sender.sendMessage("You are " + (latestBuildNum - buildNum) + " versions behind, download the latest build from http://ci.geysermc.org/");
+                    }
+                } else {
+                    throw new AssertionError();
+                }
+            } catch (Exception e) {
+                sender.sendMessage("Failed to check for updates");
+            }
+        }
+    }
+}