LUCENE-10234: Change module prefix to org.apache.* (#487)

gradle/java/jar-manifest.gradle

@@ -1,3 +1,6 @@
+import java.util.jar.JarFile
+import java.util.regex.Matcher
+
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -47,8 +50,7 @@ subprojects {
             }
           }
 
-          manifest {
-            attributes([
+          def manifestAttrs = [
               "Extension-Name"        : implementationTitle,
 
               "Implementation-Vendor" : "The Apache Software Foundation",
@@ -64,10 +66,17 @@ subprojects {
               "X-Compile-Target-JDK"  : "${-> project.targetCompatibility}",
 
               "X-Build-JDK"           : "${System.properties['java.version']} (${System.properties['java.vendor']} ${System.properties['java.vm.version']})",
-              "X-Build-OS"            : "${System.properties['os.name']} ${System.properties['os.arch']} ${System.properties['os.version']}",
+              "X-Build-OS"            : "${System.properties['os.name']} ${System.properties['os.arch']} ${System.properties['os.version']}"
+          ]
 
-              "Automatic-Module-Name" : "${-> project.path.replaceFirst(":", "").replace(':', '.').replace("-", "_")}"
-            ])
+          // Only apply automatic module name to jar task.
+          if (task.name in ["jar"]) {
+            manifestAttrs["Automatic-Module-Name"] =
+              "${->  project.path.replaceFirst(/^:lucene/, Matcher.quoteReplacement(project.group)).replace(':', '.').replace('-', '_')}"
+          }
+
+          manifest {
+            attributes(manifestAttrs)
           }
 
           // Copy legalese into META-INF.
@@ -79,3 +88,29 @@ subprojects {
           }
       }
 }
+
+configure(rootProject) {
+  tasks.register("showModuleNames", { showModuleTask ->
+    def allJarTasks = []
+
+    rootProject.subprojects.each { subproject ->
+      subproject.tasks.matching { it.name == 'jar' }.all {
+        allJarTasks.add it
+      }
+    }
+
+    dependsOn allJarTasks
+
+    doFirst {
+      allJarTasks.each { jarTask ->
+        File jarFile = jarTask.outputs.files.singleFile
+        try (def jar = new JarFile(jarFile)) {
+          logger.lifecycle(String.format(Locale.ROOT,
+              "%-50s -> %s",
+              jarFile.name,
+              jar.manifest.mainAttributes.getValue("Automatic-Module-Name")))
+        }
+      }
+    }
+  })
+}

lucene/CHANGES.txt

@@ -254,7 +254,9 @@ API Changes
 Improvements
 ---------------------
 
-* LUCENE-10234: Added Automatic-Module-Name to all JARs. (Dawid Weiss)
+* LUCENE-10234: Added Automatic-Module-Name to all JARs. This is the first step to enable full Java
+  module system (JMS) support in later Lucene versions. At the moment, the automatic names should
+  not be considered stable. (Dawid Weiss, Uwe Schindler)
 
 * LUCENE-10182: TestRamUsageEstimator used RamUsageTester.sizeOf throughout, making some of the
   tests trivial. Now, it compares results from RamUsageEstimator with those from RamUsageTester.

lucene/distribution/src/binary-release/bin/luke.cmd

@@ -17,5 +17,5 @@
 
 SETLOCAL
 SET MODULES=%~dp0..
-start javaw --module-path "%MODULES%\modules;%MODULES%\modules-thirdparty" --add-modules org.apache.logging.log4j --module lucene.luke
+start javaw --module-path "%MODULES%\modules;%MODULES%\modules-thirdparty" --add-modules org.apache.logging.log4j --module org.apache.lucene.luke
 ENDLOCAL

lucene/distribution/src/binary-release/bin/luke.sh

@@ -17,4 +17,4 @@
 
 MODULES=`dirname "$0"`/..
 MODULES=`cd "$MODULES" && pwd`
-java --module-path "$MODULES/modules:$MODULES/modules-thirdparty" --add-modules org.apache.logging.log4j --module lucene.luke
+java --module-path "$MODULES/modules:$MODULES/modules-thirdparty" --add-modules org.apache.logging.log4j --module org.apache.lucene.luke

lucene/luke/src/distribution/README.md

@@ -27,7 +27,7 @@ java -jar ${luke.cmd}
 or, using Java modules:
 
 ```
-java --module-path . --add-modules org.apache.logging.log4j --module lucene.luke
+java --module-path . --add-modules org.apache.logging.log4j --module org.apache.lucene.luke
 ```
 
 Happy index hacking!