From 73a024cf458d6af0ffcad6a24afff3c2c9cec1ce Mon Sep 17 00:00:00 2001
From: Eduardo Martins <emartins@redhat.com>
Date: Wed, 29 May 2024 11:30:48 +0100
Subject: [PATCH] [CMTOOL-372] skips migration of internal modules

---
 .../migration/core/jboss/JBossServer.java     | 17 ++++++++
 .../core/jboss/ModulesMigrationTask.java      | 10 +++--
 testsuite/server-migration-simple-test-raw.sh | 39 +++++++++++++++++++
 3 files changed, 63 insertions(+), 3 deletions(-)
 create mode 100755 testsuite/server-migration-simple-test-raw.sh

diff --git a/core/src/main/java/org/jboss/migration/core/jboss/JBossServer.java b/core/src/main/java/org/jboss/migration/core/jboss/JBossServer.java
index 9e9b16f9a..dd63b9d84 100644
--- a/core/src/main/java/org/jboss/migration/core/jboss/JBossServer.java
+++ b/core/src/main/java/org/jboss/migration/core/jboss/JBossServer.java
@@ -347,6 +347,14 @@ public static class Modules {
         private final List<Path> addonDirs;
         private final Path overlayDir;
 
+        private static final ModuleIdentifier[] INTERNAL_MODULES = {
+                ModuleIdentifier.fromString("java.desktop"),
+                ModuleIdentifier.fromString("java.logging"),
+                ModuleIdentifier.fromString("java.sql"),
+                ModuleIdentifier.fromString("java.xml"),
+                ModuleIdentifier.fromString("org.jboss.modules")
+        };
+
         public Modules(Path serverBaseDir) {
             this.modulesDir = serverBaseDir.resolve("modules");
             this.layerDirs = new ArrayList<>();
@@ -459,6 +467,15 @@ public Path getModuleDir(ModuleIdentifier moduleId) {
             }
             return modulesDir.resolve(modulePath);
         }
+
+        public boolean isInternalModule(ModuleIdentifier moduleIdentifier) {
+            for (ModuleIdentifier internalModuleIdentifier : INTERNAL_MODULES) {
+                if (internalModuleIdentifier.equals(moduleIdentifier)) {
+                    return true;
+                }
+            }
+            return false;
+        }
     }
 
     public static class Extensions {
diff --git a/core/src/main/java/org/jboss/migration/core/jboss/ModulesMigrationTask.java b/core/src/main/java/org/jboss/migration/core/jboss/ModulesMigrationTask.java
index 72957ebe3..6aa37190e 100644
--- a/core/src/main/java/org/jboss/migration/core/jboss/ModulesMigrationTask.java
+++ b/core/src/main/java/org/jboss/migration/core/jboss/ModulesMigrationTask.java
@@ -123,14 +123,18 @@ public void migrateModule(final ModuleIdentifier moduleIdentifier, final String
                 context.getLogger().debugf("Skipping module %s migration, it's excluded by environment.", moduleIdentifier);
                 return;
             }
-            final JBossServer.Module sourceModule = sourceModules.getModule(moduleIdentifier);
-            if (sourceModule == null) {
-                throw new IllegalStateException("Migration of module "+moduleIdentifier+" required, but module not found in source server.");
+            if (targetModules.isInternalModule(moduleIdentifier)) {
+                context.getLogger().debugf("Skipping module %s migration, it's an internal target server's module.", moduleIdentifier);
+                return;
             }
             if (targetModules.getModule(moduleIdentifier) != null) {
                 context.getLogger().debugf("Skipping module %s migration, already exists in target.", moduleIdentifier, reason);
                 return;
             }
+            final JBossServer.Module sourceModule = sourceModules.getModule(moduleIdentifier);
+            if (sourceModule == null) {
+                throw new IllegalStateException("Migration of module "+moduleIdentifier+" required, but module not found in source server.");
+            }
             final ServerMigrationTaskName taskName = new ServerMigrationTaskName.Builder(context.getTaskName().getName()+".migrate-module").addAttribute("id", moduleIdentifier.toString()).build();
             final ServerMigrationTask subtask = new ServerMigrationTask() {
                 @Override
diff --git a/testsuite/server-migration-simple-test-raw.sh b/testsuite/server-migration-simple-test-raw.sh
new file mode 100755
index 000000000..b8106246e
--- /dev/null
+++ b/testsuite/server-migration-simple-test-raw.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+set -e
+set -o pipefail
+
+DIRNAME=`dirname "$0"`
+TEST_DIR=`cd "$DIRNAME"; pwd`
+TEST_BEFORE_DIR=$TEST_DIR/before/dist
+TEST_AFTER_DIR=$TEST_DIR/after
+TOOL_DIR="$TEST_DIR/jboss-server-migration"
+SOURCE_DIST_DIR="$1"
+TARGET_DIST_DIR="$2"
+
+if [ "x$SOURCE_DIST_DIR" != "x" ]; then
+    if [[ $SOURCE_DIST_DIR != /* ]]; then
+        SOURCE_DIST_DIR="$TEST_DIR/$SOURCE_DIST_DIR"
+    fi
+else
+    echo "### Usage: ./server-migration-simple-test.sh SOURCE_DIST_DIR TARGET_DIST_DIR"
+    exit
+fi
+
+if [ ! -d $SOURCE_DIST_DIR ]; then
+    echo "### Source Server base directory $SOURCE_DIST_DIR does not exists!"
+    exit 1;
+fi
+echo "### Source Server base directory: $SOURCE_DIST_DIR"
+
+if [ ! -d $TARGET_DIST_DIR ]; then
+    echo "### Target Server dist directory $TARGET_DIST_DIR does not exists!"
+    exit 1;
+fi
+echo "### Target Server dist directory: $TARGET_DIST_DIR"
+
+echo "### Preparing JBoss Server Migration Tool binary..."
+rm -Rf $TOOL_DIR
+unzip $TEST_DIR/../dist/standalone/target/jboss-server-migration-*.zip -d $TEST_DIR
+
+echo "### Executing the migration..."
+$TOOL_DIR/jboss-server-migration.sh -n -s $SOURCE_DIST_DIR -t $TARGET_DIST_DIR  -Djboss.server.migration.modules.excludes=""
\ No newline at end of file