adding a maven assembly descriptor for the standalone jar

Author: ngbsn

pom.xml

@@ -176,16 +176,14 @@
                 <artifactId>maven-assembly-plugin</artifactId>
                 <version>${maven.assembly.plugin.version}</version>
                 <configuration>
-                    <descriptorRefs>
-                        <descriptorRef>jar-with-dependencies</descriptorRef>
-                    </descriptorRefs>
+                    <descriptors>
+                        <descriptor>src/main/resources/assembly/standalone.xml</descriptor>
+                    </descriptors>
                     <archive>
                         <manifest>
                             <mainClass>io.github.ngbsn.generator.JPACodeGenerator</mainClass>
                         </manifest>
                     </archive>
-                    <finalName>sqlscript2jpa-codegen-standalone-${project.version}</finalName>
-                    <appendAssemblyId>false</appendAssemblyId>
                 </configuration>
                 <executions>
                     <execution>

src/main/resources/assembly/standalone.xml

@@ -0,0 +1,18 @@
+<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.2.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.2.0 https://maven.apache.org/xsd/assembly-2.2.0.xsd">
+    <!-- TODO: a jarjar format would be better -->
+    <id>standalone</id>
+    <formats>
+        <format>jar</format>
+    </formats>
+    <includeBaseDirectory>false</includeBaseDirectory>
+    <dependencySets>
+        <dependencySet>
+            <outputDirectory>/</outputDirectory>
+            <useProjectArtifact>true</useProjectArtifact>
+            <unpack>true</unpack>
+            <scope>runtime</scope>
+        </dependencySet>
+    </dependencySets>
+</assembly>