Add Maven Build Cache plugin

The build cache extension caches the results of
maven goal executions and skips re-running them if
the same inputs are detected again.

This helps both local development (re run tests of
affected modules only) and CI builds eventually (a
subsequent commit will introduce sharing of the cache
between CI runs)

Signed-off-by: Eric Bottard <[email protected]>

Author: ericbottard

.mvn/extensions.xml

@@ -21,4 +21,9 @@
       <artifactId>maven-profiler</artifactId>
       <version>3.2</version>
     </extension>
+	<extension>
+		<groupId>org.apache.maven.extensions</groupId>
+		<artifactId>maven-build-cache-extension</artifactId>
+		<version>1.2.1</version>
+	</extension>
 </extensions>

.mvn/maven-build-cache-config.xml

@@ -0,0 +1,32 @@
+<cache xmlns="http://maven.apache.org/BUILD-CACHE-CONFIG/1.2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/BUILD-CACHE-CONFIG/1.2.0 https://maven.apache.org/xsd/build-cache-config-1.2.0.xsd">
+	<configuration>
+		<attachedOutputs>
+			<dirNames>
+				<dirName>antora</dirName>
+			</dirNames>
+		</attachedOutputs>
+	</configuration>
+	<input>
+		<global>
+			<includes>
+				<!--  By default, project sources and resources directories are included (src/main/java and src/main/resources)  -->
+				<!--  Here, the goal is to include a wider range of src directories (like src/main/assembly or src/main/antora)  -->
+				<include>src/</include>
+			</includes>
+		</global>
+	</input>
+	<executionControl>
+		<reconcile>
+			<plugins>
+				<plugin artifactId="maven-surefire-plugin" goal="test">
+					<reconciles>
+						<reconcile propertyName="skip" skipValue="true"/>
+						<reconcile propertyName="skipExec" skipValue="true"/>
+						<reconcile propertyName="skipTests" skipValue="true"/>
+						<reconcile propertyName="testFailureIgnore" skipValue="true"/>
+					</reconciles>
+				</plugin>
+			</plugins>
+		</reconcile>
+	</executionControl>
+</cache>

.mvn/wrapper/maven-wrapper.properties

@@ -13,5 +13,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.6/apache-maven-3.8.6-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.1/apache-maven-3.9.1-bin.zip
 wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar