Add a new property dedicated to the continuous deployment of the project.

Add a new Maven plugin to get the current commit hash from git and add
a configuration section to the source, jar and war plugins in order to
set additional properties into the MANIFEST.MF file: the git commit hash,
the build version and the build timestamp.
The git commit hash will be used by our CI to determine from which commit
hash the release of a stable version has to be done.

The sources are also packaged and deployed into our Nexus repo.

Author: mmoqui

pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (C) 2000 - 2017 Silverpeas
+    Copyright (C) 2000 - 2018 Silverpeas
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as
@@ -94,6 +94,8 @@
   </distributionManagement>
 
   <properties>
+    <!-- property used by the CI to both deploy a build version and release the next stable version -->
+    <next.release>1.0</next.release>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -194,8 +196,73 @@
             <showDeprecation>true</showDeprecation>
           </configuration>
         </plugin>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-source-plugin</artifactId>
+          <version>3.0.1</version>
+          <configuration>
+            <archive>
+              <manifestEntries>
+                <Build-Version>${project.version}</Build-Version>
+                <Git-Commit>${git.commit.id.abbrev}</Git-Commit>
+                <Build-Timestamp>${maven.build.timestamp}</Build-Timestamp>
+              </manifestEntries>
+            </archive>
+          </configuration>
+        </plugin>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+          <configuration>
+            <archive>
+              <manifestEntries>
+                <Build-Version>${project.version}</Build-Version>
+                <Git-Commit>${git.commit.id.abbrev}</Git-Commit>
+                <Build-Timestamp>${maven.build.timestamp}</Build-Timestamp>
+              </manifestEntries>
+            </archive>
+          </configuration>
+        </plugin>
+        <plugin>
+          <groupId>pl.project13.maven</groupId>
+          <artifactId>git-commit-id-plugin</artifactId>
+          <version>2.2.4</version>
+          <configuration>
+            <dotGitDirectory>${project.basedir}/.git</dotGitDirectory>
+            <dateFormat>yyyy-MM-dd'T'HH:mm:ssZ</dateFormat>
+            <generateGitPropertiesFile>false</generateGitPropertiesFile>
+          </configuration>
+        </plugin>
       </plugins>
     </pluginManagement>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>attach-sources</id>
+            <phase>verify</phase>
+            <goals>
+              <goal>jar-no-fork</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>pl.project13.maven</groupId>
+        <artifactId>git-commit-id-plugin</artifactId>
+        <executions>
+          <execution>
+            <phase>validate</phase>
+            <goals>
+              <goal>revision</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
   </build>
 
   <profiles>