How to merge files under different folders with same name using maven plugin - maven

Question

I have a requirement to merge all the files with same name under two different folders and output that to another folder.
Ex:
common
|
V1.sql
V2.sql
module
|
V1.sql
V2.sql
Now my target directory should be
target dir
|
V1.sql(has both the contents of common and module)
V2.sql(has both the contents of common and module)
I have looked at several maven plugins, but they dont seemed to support this. Please guide if anyone has come across such problem or implemented a plugin,

Answer 1

Not really pretty, but i achived this with the maven exec plugin:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.4.0</version>
<executions>
<execution>
<id>resourceMerge</id>
<goals>
<goal>java</goal>
</goals>
<phase>prepare-package</phase>
<configuration>
<mainClass>mavenProcessor.Resourcesmerger</mainClass>
<arguments>
<argument>${project.build.directory}/resourcesDefault</argument>
<argument>${project.build.directory}/resourcesProfile</argument>
<argument>${project.build.directory}/resourcesMerged</argument>
</arguments>
</configuration>
</execution>
</executions>
</plugin>
The Processor looks like this
package mavenProcessor;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.stream.Collectors;
public class Resourcesmerger {
public static void main(String[] args) throws Throwable {
Path inputDir1 = new File(args[0]).toPath();
Path inputDir2 = new File(args[1]).toPath();
Path outputDir = new File(args[2]).toPath();
copyAppending(inputDir1, outputDir);
if (Files.exists(inputDir2)) {
copyAppending(inputDir2, outputDir);
}
}
private static void copyAppending(Path inputDir1, Path outputDir) throws IOException, FileNotFoundException {
List<Path> defaultResources = Files.walk(inputDir1).collect(Collectors.toList());
for (Path path : defaultResources) {
if (Files.isRegularFile(path)) {
Path relativePath = inputDir1.relativize(path);
Path targetPath = outputDir.resolve(relativePath);
targetPath.getParent().toFile().mkdirs();
try (FileOutputStream fos = new FileOutputStream(targetPath.toFile(), true)) {
System.out.println("Merge " + path + " to " + targetPath);
System.out.flush();
Files.copy(path, fos);
}
}
}
}
}