chore: Build java 21 modules only when java 21 is available

Author: Xephi

README.md

@@ -115,13 +115,16 @@ You can also create your own translation file and, if you want, you can share it
 ## Requirements
 
 ##### Compiling requirements:
->- JDK 17+
+>- JDK 17+ for `authme-core` and `authme-spigot-legacy`
+>- JDK 21+ for the full multi-module build (`authme-spigot-1.21`, `authme-paper-common`, `authme-paper`, `authme-folia`)
 >- Maven (3.8.8+)
 >- Git/GitHub (Optional)
 
 ##### How to compile the project:
 >- Clone the project with Git/GitHub
->- Execute command "mvn clean package"
+>- Execute command `mvn clean package`
+>- With JDK 17, Maven builds only the Java 17-compatible modules
+>- With JDK 21+, Maven builds the full reactor
 
 ##### Running requirements:
 >- Java 17+

authme-core/pom.xml

@@ -256,7 +256,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <finalName>${project.finalNameBase}</finalName>
-                    <source>${java.source}</source>
+                    <source>${module.java.version}</source>
                 </configuration>
                 <executions>
                     <execution>

authme-folia/pom.xml

@@ -16,6 +16,7 @@
     <description>AuthMe plugin for Folia 1.21</description>
 
     <properties>
+        <module.java.version>21</module.java.version>
         <plugin.api-version>1.21.11</plugin.api-version>
         <module.classifier>Folia</module.classifier>
     </properties>
@@ -116,7 +117,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <finalName>${project.build.finalName}</finalName>
-                    <source>${java.source}</source>
+                    <source>${module.java.version}</source>
                     <detectOfflineLinks>false</detectOfflineLinks>
                 </configuration>
                 <executions>

authme-paper-common/pom.xml

@@ -15,6 +15,10 @@
     <name>AuthMe Paper Common</name>
     <description>Shared Paper-derived implementation code for AuthMe Paper and Folia</description>
 
+    <properties>
+        <module.java.version>21</module.java.version>
+    </properties>
+
     <dependencies>
         <dependency>
             <groupId>fr.xephi</groupId>

authme-paper/pom.xml

@@ -16,6 +16,7 @@
     <description>AuthMe plugin for PaperMC 1.21</description>
 
     <properties>
+        <module.java.version>21</module.java.version>
         <plugin.api-version>1.21.11</plugin.api-version>
         <module.classifier>Paper</module.classifier>
     </properties>
@@ -116,7 +117,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <finalName>${project.build.finalName}</finalName>
-                    <source>${java.source}</source>
+                    <source>${module.java.version}</source>
                     <detectOfflineLinks>false</detectOfflineLinks>
                 </configuration>
                 <executions>

authme-spigot-1.21/pom.xml

@@ -16,6 +16,7 @@
     <description>AuthMe plugin for Spigot 1.20.x and 1.21.x</description>
 
     <properties>
+        <module.java.version>21</module.java.version>
         <spigot.api.version>1.21.11-R0.2-SNAPSHOT</spigot.api.version>
         <plugin.api-version>1.21.11</plugin.api-version>
         <module.classifier>Spigot-1.21</module.classifier>
@@ -152,7 +153,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <finalName>${project.build.finalName}</finalName>
-                    <source>${java.source}</source>
+                    <source>${module.java.version}</source>
                 </configuration>
                 <executions>
                     <execution>

authme-spigot-legacy/pom.xml

@@ -124,7 +124,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <configuration>
                     <finalName>${project.build.finalName}</finalName>
-                    <source>${java.source}</source>
+                    <source>${module.java.version}</source>
                 </configuration>
                 <executions>
                     <execution>

pom.xml

@@ -57,10 +57,6 @@
     <modules>
         <module>authme-core</module>
         <module>authme-spigot-legacy</module>
-        <module>authme-spigot-1.21</module>
-        <module>authme-paper-common</module>
-        <module>authme-paper</module>
-        <module>authme-folia</module>
     </modules>
 
     <properties>
@@ -71,10 +67,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <revision>6.0.0-SNAPSHOT</revision>
-        <java.source>17</java.source>
-        <java.target>17</java.target>
-        <java.apiVersion>17</java.apiVersion>
-        <java.compiler.minimumVersion>17</java.compiler.minimumVersion>
+        <module.java.version>17</module.java.version>
         <maven.minimumVersion>3.8.8</maven.minimumVersion>
 
         <!-- Versioning properties -->
@@ -132,6 +125,18 @@
                 <project.buildNumber>${env.BUILD_NUMBER}</project.buildNumber>
             </properties>
         </profile>
+        <profile>
+            <id>java21-modules</id>
+            <activation>
+                <jdk>[21,)</jdk>
+            </activation>
+            <modules>
+                <module>authme-spigot-1.21</module>
+                <module>authme-paper-common</module>
+                <module>authme-paper</module>
+                <module>authme-folia</module>
+            </modules>
+        </profile>
         <!-- Skip long hash tests, reduce the test time of 20-30 seconds -->
         <profile>
             <id>skipLongHashTests</id>
@@ -183,7 +188,7 @@
                                         <version>${maven.minimumVersion}</version>
                                     </requireMavenVersion>
                                     <requireJavaVersion>
-                                        <version>[${java.compiler.minimumVersion},)</version>
+                                        <version>[${module.java.version},)</version>
                                     </requireJavaVersion>
                                 </rules>
                                 <fail>true</fail>
@@ -206,9 +211,9 @@
                     <artifactId>maven-compiler-plugin</artifactId>
                     <version>3.13.0</version>
                     <configuration>
-                        <source>${java.source}</source>
-                        <target>${java.target}</target>
-                        <release>${java.apiVersion}</release>
+                        <source>${module.java.version}</source>
+                        <target>${module.java.version}</target>
+                        <release>${module.java.version}</release>
                     </configuration>
                 </plugin>
                 <plugin>
@@ -305,6 +310,10 @@
         </pluginManagement>
 
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-enforcer-plugin</artifactId>
+            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>flatten-maven-plugin</artifactId>