[incubator-kie-issues#1347] Enforce reproducible build

.github/workflows/pr-drools.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Build Chain
         uses: apache/incubator-kie-kogito-pipelines/.ci/actions/build-chain@main
         env:
-          BUILD_MVN_OPTS_CURRENT: -Dfull
+          BUILD_MVN_OPTS_CURRENT: '-Dfull -Dreproducible'
           MAVEN_OPTS: "-Dfile.encoding=UTF-8"
         with:
           definition-file: https://raw.githubusercontent.com/${GROUP:apache}/incubator-kie-kogito-pipelines/${BRANCH:main}/.ci/pull-request-config.yaml

drools-examples-api/default-kiesession-from-file/src/test/java/org/drools/example/api/defaultkiesessionfromfile/DefaultKieSessionFromByteArrayExampleTest.java

@@ -21,8 +21,10 @@
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FilenameFilter;
 import java.io.InputStream;
 import java.io.PrintStream;
+import java.util.Arrays;
 
 import org.junit.Test;
 import org.kie.api.KieServices;
@@ -120,11 +122,19 @@ public static File getFile(String exampleName) {
                 throw new RuntimeException("The target folder does not exist, please build project " + exampleName + " first");
             }
 
-            for (String str : targetFolder.list()) {
-                if (str.startsWith(exampleName) && !str.endsWith("-sources.jar") && !str.endsWith("-tests.jar") && !str.endsWith("-javadoc.jar")) {
-                    return new File(targetFolder, str);
-                }
+            FilenameFilter expectedJArFilter = (d, str ) -> str.startsWith(exampleName) &&
+                    str.endsWith(".jar") &&
+                    !str.endsWith("-sources.jar") &&
+                    !str.endsWith("-tests.jar") &&
+                    !str.endsWith("-javadoc.jar");
+            String[] foundFile = targetFolder.list(expectedJArFilter);
+            if (foundFile == null || foundFile.length == 0) {
+                throw new RuntimeException("The target jar does not exist, please build project " + exampleName + " first");
+            } else if (foundFile.length > 1) {
+                String errorFiles =  Arrays.toString(foundFile);
+                throw new RuntimeException("Multiple matching files exists: " + errorFiles + "; please check!");
             }
+            return new File(targetFolder, foundFile[0]);
         }
 
         throw new RuntimeException("The target jar does not exist, please build project " + exampleName + " first");

pom.xml

@@ -239,6 +239,42 @@
         <module>drools-distribution</module>
       </modules>
     </profile>
+    <profile>
+      <id>reproducible-build</id>
+      <activation>
+        <property>
+          <name>reproducible</name>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-artifact-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>check-buildplan</id>
+                <goals>
+                  <goal>check-buildplan</goal>
+                </goals>
+                <!-- The execution's configuration is part of the pluginManagement. This piece here only makes sure the
+                     execution is enabled (by specifying a phase) for full profile builds. -->
+                <phase>validate</phase>
+              </execution>
+              <execution>
+                <id>compare</id>
+                <goals>
+                  <goal>compare</goal>
+                </goals>
+                <!-- The execution's configuration is part of the pluginManagement. This piece here only makes sure the
+                     execution is enabled (by specifying a phase) for full profile builds. -->
+                <phase>install</phase>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
     <profile><!-- this profile is defined here in order to be available from the root of the drools repository and maven reactor build -->
       <id>rewrite</id>
       <build>