Update pom.xml

Author: mmadson

innersource-maven-plugin/pom.xml

@@ -122,5 +122,38 @@
                 </executions>
             </plugin>
         </plugins>
-    </build>   
+    </build> 
+
+    <profiles>
+        <profile>
+            <id>sign</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-gpg-plugin</artifactId>
+                        <version>3.0.1</version>
+                        <executions>
+                            <execution>
+                                <id>sign-artifacts</id>
+                                <phase>verify</phase>
+                                <goals>
+                                    <goal>sign</goal>
+                                </goals>
+                                <configuration>
+                                  <keyname>${env.GPG_KEYID}</keyname>
+                                  <passphraseServerId>${env.GPG_KEYID}</passphraseServerId>
+                                  <gpgArguments>
+                                      <arg>--pinentry-mode</arg>
+                                      <arg>loopback</arg>
+                                  </gpgArguments>
+                                </configuration>
+                            </execution>
+                        </executions>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+  
 </project>