Add API checking using clirr

In order to generate API reports run: mvn clirr:clirr

The reports are generated to the folder
target/site/clirr-report.html under the respective
project.

In order to check API compatibility and fail the build
on incompatible changes run: mvn clirr:check

For now we compare the API against the latest release
1.1.0.201109151100-r.

Bug: 336849
Change-Id: I21baaf3a6883c5b4db263f712705cc7b8ab6d888
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Kevin Sawicki <kevin@github.com>

org.eclipse.jgit.ant/pom.xml

@@ -110,6 +110,25 @@
 					<encoding>UTF-8</encoding>
 				</configuration>
 			</plugin>
+
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>clirr-maven-plugin</artifactId>
+			</plugin>
 		</plugins>
 	</build>
+
+	<reporting>
+		<plugins>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>clirr-maven-plugin</artifactId>
+				<version>${clirr-version}</version>
+				<configuration>
+					<comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+					<minSeverity>info</minSeverity>
+				</configuration>
+			</plugin>
+		</plugins>
+	</reporting>
 </project>

org.eclipse.jgit.console/pom.xml

@@ -108,6 +108,25 @@
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+      </plugin>
     </plugins>
   </build>
+
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+        <version>${clirr-version}</version>
+        <configuration>
+          <comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+          <minSeverity>info</minSeverity>
+        </configuration>
+      </plugin>
+    </plugins>
+  </reporting>
 </project>

org.eclipse.jgit.http.server/pom.xml

@@ -125,6 +125,25 @@
           </archive>
         </configuration>
       </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+      </plugin>
     </plugins>
   </build>
+
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+        <version>${clirr-version}</version>
+        <configuration>
+          <comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+          <minSeverity>info</minSeverity>
+        </configuration>
+      </plugin>
+    </plugins>
+  </reporting>
 </project>

org.eclipse.jgit.storage.dht/pom.xml

@@ -157,6 +157,25 @@
                </execution>
             </executions>
          </plugin>
+
+         <plugin>
+            <groupId>org.codehaus.mojo</groupId>
+            <artifactId>clirr-maven-plugin</artifactId>
+         </plugin>
     </plugins>
   </build>
+
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+        <version>${clirr-version}</version>
+        <configuration>
+          <comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+          <minSeverity>info</minSeverity>
+        </configuration>
+      </plugin>
+    </plugins>
+  </reporting>
 </project>

org.eclipse.jgit/pom.xml

@@ -142,7 +142,13 @@
           </archive>
         </configuration>
       </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+      </plugin>
     </plugins>
+
     <pluginManagement>
       <plugins>
         <plugin>
@@ -155,4 +161,18 @@
       </plugins>
     </pluginManagement>
   </build>
+
+  <reporting>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>clirr-maven-plugin</artifactId>
+        <version>${clirr-version}</version>
+        <configuration>
+          <comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+          <minSeverity>info</minSeverity>
+        </configuration>
+      </plugin>
+    </plugins>
+  </reporting>
 </project>

pom.xml

@@ -130,14 +130,23 @@
     <maven.build.timestamp.format>yyyyMMddHHmm</maven.build.timestamp.format>
     <bundle-manifest>${project.build.directory}/META-INF/MANIFEST.MF</bundle-manifest>
 
+    <jgit-last-release-version>1.1.0.201109151100-r</jgit-last-release-version>
     <jsch-version>0.1.44-1</jsch-version>
     <junit-version>4.5</junit-version>
     <args4j-version>2.0.12</args4j-version>
     <servlet-api-version>2.5</servlet-api-version>
     <jetty-version>7.1.6.v20100715</jetty-version>
     <protobuf-version>2.4.0a</protobuf-version>
+    <clirr-version>2.3</clirr-version>
   </properties>
 
+  <repositories>
+    <repository>
+      <id>jgit-repository</id>
+      <url>http://download.eclipse.org/jgit/maven</url>
+    </repository>
+  </repositories>
+
   <build>
     <pluginManagement>
       <plugins>
@@ -246,6 +255,16 @@
             </execution>
           </executions>
         </plugin>
+
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>clirr-maven-plugin</artifactId>
+          <version>${clirr-version}</version>
+          <configuration>
+            <comparisonVersion>${jgit-last-release-version}</comparisonVersion>
+            <minSeverity>info</minSeverity>
+          </configuration>
+        </plugin>
       </plugins>
     </pluginManagement>