Commit id in production

pom.xml

<project>
    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <!-- outputFile doesn't work in the regular v1.2 (see MEXEC-86) -->
                <version>1.2.1-BRING</version>
                <executions>
                    <execution>
                        <id>git-revision</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>exec</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <executable>bash</executable>
                    <arguments>
                        <argument>${project.basedir}/revision.sh</argument>
                    </arguments>
                    <outputFile>${project.basedir}/src/main/webapp/revision.txt</outputFile>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

revision.sh

#!/bin/bash

BRANCHES=$(git show -s --pretty=%d HEAD)
REVISION=$(git log --format=format:"%H %ci" -1)
echo "$REVISION $BRANCHES"