Fix: Extensions should specify geyser api version instead of base api version

api/build.gradle.kts

@@ -1,8 +1,24 @@
 plugins {
+    // Allow blossom to mark sources root of templates
+    idea
     id("geyser.publish-conventions")
+    alias(libs.plugins.blossom)
 }
 
 dependencies {
     api(libs.base.api)
     api(libs.math)
-}
+}
+
+version = property("version")!!
+val apiVersion = (version as String).removeSuffix("-SNAPSHOT")
+
+sourceSets {
+    main {
+        blossom {
+            javaSources {
+                property("version", apiVersion)
+            }
+        }
+    }
+}

api/src/main/java-templates/org.geysermc.geyser.api/BuildData.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2024 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.geyser.api;
+
+import org.geysermc.api.util.ApiVersion;
+
+/**
+ * Not a public API. For internal use only. May change without notice.
+ * This class is processed before compilation to insert build properties.
+ */
+class BuildData {
+    static final String VERSION = "{{ version }}";
+    static final ApiVersion API_VERSION;
+
+    static {
+        String[] parts = VERSION.split("\\.");
+        if (parts.length != 3) {
+            throw new RuntimeException("Invalid api version: " + VERSION);
+        }
+
+        try {
+            int human = Integer.parseInt(parts[0]);
+            int major = Integer.parseInt(parts[1]);
+            int minor = Integer.parseInt(parts[2]);
+            API_VERSION = new ApiVersion(human, major, minor);
+        } catch (Exception e) {
+            throw new RuntimeException("Invalid api version: " + VERSION, e);
+        }
+    }
+}

api/src/main/java/org/geysermc/geyser/api/GeyserApi.java

@@ -29,6 +29,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.geysermc.api.Geyser;
 import org.geysermc.api.GeyserApiBase;
+import org.geysermc.api.util.ApiVersion;
 import org.geysermc.geyser.api.command.CommandSource;
 import org.geysermc.geyser.api.connection.GeyserConnection;
 import org.geysermc.geyser.api.event.EventBus;
@@ -169,4 +170,14 @@ public interface GeyserApi extends GeyserApiBase {
     static GeyserApi api() {
         return Geyser.api(GeyserApi.class);
     }
+
+    /**
+     * Returns the {@link ApiVersion} representing the current Geyser api version.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     *
+     * @return the current geyser api version
+     */
+     default ApiVersion geyserApiVersion() {
+        return BuildData.API_VERSION;
+     }
 }

api/src/main/java/org/geysermc/geyser/api/extension/ExtensionDescription.java

@@ -59,33 +59,46 @@ public interface ExtensionDescription {
     String main();
 
     /**
-     * Gets the extension's major api version
+     * Represents the human api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
      *
-     * @return the extension's major api version
+     * @return the extension's requested human api version
+     */
+    int humanApiVersion();
+
+    /**
+     * Represents the major api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
+     *
+     * @return the extension's requested major api version
      */
     int majorApiVersion();
 
     /**
-     * Gets the extension's minor api version
+     * Represents the minor api version that the extension requires.
+     * See the <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">Geyser version outline</a>)
+     * for more details on the Geyser API version.
      *
-     * @return the extension's minor api version
+     * @return the extension's requested minor api version
      */
     int minorApiVersion();
 
     /**
-     * Gets the extension's patch api version
-     *
-     * @return the extension's patch api version
+     * No longer in use. Geyser is now using an adaption of the romantic versioning scheme.
+     * See <a href="https://github.com/geysermc/api/blob/master/geyser-versioning.md">here</a> for details.
      */
-    int patchApiVersion();
+    @Deprecated(forRemoval = true)
+    default int patchApiVersion() {
+        return minorApiVersion();
+    }
 
     /**
-     * Gets the extension's api version.
-     *
-     * @return the extension's api version
+     * Returns the extension's requested Geyser Api version.
      */
     default String apiVersion() {
-        return majorApiVersion() + "." + minorApiVersion() + "." + patchApiVersion();
+        return humanApiVersion() + "." + majorApiVersion() + "." + minorApiVersion();
     }
 
     /**

core/src/main/java/org/geysermc/geyser/extension/GeyserExtensionDescription.java

@@ -43,9 +43,9 @@
 public record GeyserExtensionDescription(@NonNull String id,
                                          @NonNull String name,
                                          @NonNull String main,
+                                         int humanApiVersion,
                                          int majorApiVersion,
                                          int minorApiVersion,
-                                         int patchApiVersion,
                                          @NonNull String version,
                                          @NonNull List<String> authors) implements ExtensionDescription {
 
@@ -82,9 +82,9 @@ public static GeyserExtensionDescription fromYaml(Reader reader) throws InvalidD
             throw new InvalidDescriptionException(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_format", name, apiVersion));
         }
         String[] api = apiVersion.split("\\.");
-        int majorApi = Integer.parseUnsignedInt(api[0]);
-        int minorApi = Integer.parseUnsignedInt(api[1]);
-        int patchApi = Integer.parseUnsignedInt(api[2]);
+        int humanApi = Integer.parseUnsignedInt(api[0]);
+        int majorApi = Integer.parseUnsignedInt(api[1]);
+        int minorApi = Integer.parseUnsignedInt(api[2]);
 
         List<String> authors = new ArrayList<>();
         if (source.author != null) {
@@ -94,7 +94,7 @@ public static GeyserExtensionDescription fromYaml(Reader reader) throws InvalidD
             authors.addAll(source.authors);
         }
 
-        return new GeyserExtensionDescription(id, name, main, majorApi, minorApi, patchApi, version, authors);
+        return new GeyserExtensionDescription(id, name, main, humanApi, majorApi, minorApi, version, authors);
     }
 
     @NonNull

core/src/main/java/org/geysermc/geyser/extension/GeyserExtensionLoader.java

@@ -29,18 +29,28 @@
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import lombok.RequiredArgsConstructor;
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.geysermc.api.Geyser;
+import org.geysermc.api.util.ApiVersion;
 import org.geysermc.geyser.GeyserImpl;
+import org.geysermc.geyser.api.GeyserApi;
 import org.geysermc.geyser.api.event.ExtensionEventBus;
-import org.geysermc.geyser.api.extension.*;
+import org.geysermc.geyser.api.extension.Extension;
+import org.geysermc.geyser.api.extension.ExtensionDescription;
+import org.geysermc.geyser.api.extension.ExtensionLoader;
+import org.geysermc.geyser.api.extension.ExtensionLogger;
+import org.geysermc.geyser.api.extension.ExtensionManager;
 import org.geysermc.geyser.api.extension.exception.InvalidDescriptionException;
 import org.geysermc.geyser.api.extension.exception.InvalidExtensionException;
 import org.geysermc.geyser.extension.event.GeyserExtensionEventBus;
 import org.geysermc.geyser.text.GeyserLocale;
 
 import java.io.IOException;
 import java.io.Reader;
-import java.nio.file.*;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -176,16 +186,22 @@ protected void loadAllExtensions(@NonNull ExtensionManager extensionManager) {
                         return;
                     }
 
-                    // Completely different API version
-                    if (description.majorApiVersion() != Geyser.api().majorApiVersion()) {
-                        GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_version", name, description.apiVersion()));
-                        return;
-                    }
-
-                    // If the extension requires new API features, being backwards compatible
-                    if (description.minorApiVersion() > Geyser.api().minorApiVersion()) {
-                        GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_version", name, description.apiVersion()));
-                        return;
+                    // Check whether an extensions' requested api version is compatible
+                    ApiVersion.Compatibility compatibility = GeyserApi.api().geyserApiVersion().supportsRequestedVersion(
+                        description.humanApiVersion(),
+                        description.majorApiVersion(),
+                        description.minorApiVersion()
+                    );
+
+                    if (compatibility != ApiVersion.Compatibility.COMPATIBLE) {
+                        // Workaround for the switch to the Geyser API version instead of the Base API version in extensions
+                        if (compatibility == ApiVersion.Compatibility.HUMAN_DIFFER && description.humanApiVersion() == 1) {
+                            GeyserImpl.getInstance().getLogger().warning("The extension %s requested the Base API version %s, which is deprecated in favor of specifying the Geyser API version. Please update the extension, or contact its developer."
+                                .formatted(name, description.apiVersion()));
+                        } else {
+                            GeyserImpl.getInstance().getLogger().error(GeyserLocale.getLocaleStringLog("geyser.extensions.load.failed_api_version", name, description.apiVersion()));
+                            return;
+                        }
                     }
 
                     GeyserExtensionContainer container = this.loadExtension(path, description);

gradle.properties

@@ -7,5 +7,5 @@ org.gradle.vfs.watch=false
 
 group=org.geysermc
 id=geyser
-version=2.4.0-SNAPSHOT
+version=2.4.1-SNAPSHOT
 description=Allows for players from Minecraft: Bedrock Edition to join Minecraft: Java Edition servers.

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-base-api = "1.0.0-SNAPSHOT"
+base-api = "1.0.1-SNAPSHOT"
 cumulus = "1.1.2"
 erosion = "1.1-20240515.191456-1"
 events = "1.1-SNAPSHOT"