It build flatten POM and signed artifacts

Author: vitalijr2

pom.xml

@@ -79,6 +79,7 @@
     <!-- plugins -->
     <enforcer-plugin.version>3.0.0</enforcer-plugin.version>
     <clean-plugin.version>3.2.0</clean-plugin.version>
+    <flatten-plugin.version>1.2.7</flatten-plugin.version>
     <compiler-plugin.version>3.10.1</compiler-plugin.version>
     <surefire-plugin.version>2.22.2</surefire-plugin.version>
     <jar-plugin.version>3.2.2</jar-plugin.version>
@@ -89,6 +90,7 @@
     <site-plugin.version>3.12.0</site-plugin.version>
     <docs-maven-skin.version>2.2.6</docs-maven-skin.version>
     <info-reports-plugin.version>3.2.2</info-reports-plugin.version>
+    <sign-plugin.version>1.0.1</sign-plugin.version>
     <!-- test -->
     <junit-jupiter.version>5.8.2</junit-jupiter.version>
     <mockito.version>4.4.0</mockito.version>
@@ -201,6 +203,30 @@
         <artifactId>maven-clean-plugin</artifactId>
         <version>${clean-plugin.version}</version>
       </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>flatten-maven-plugin</artifactId>
+        <version>${flatten-plugin.version}</version>
+        <configuration>
+          <flattenMode>ossrh</flattenMode>
+        </configuration>
+        <executions>
+          <execution>
+            <id>flatten</id>
+            <phase>process-resources</phase>
+            <goals>
+              <goal>flatten</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>clean</id>
+            <phase>clean</phase>
+            <goals>
+              <goal>clean</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
@@ -440,5 +466,24 @@
         </plugins>
       </build>
     </profile>
+    <profile>
+      <id>release</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.simplify4u.plugins</groupId>
+            <artifactId>sign-maven-plugin</artifactId>
+            <version>${sign-plugin.version}</version>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
   </profiles>
 </project>