Question

I am using the “Merge before build” option of the git plugin to build a maven job. I have tried using ${GIT_BRANCH} and ${GIT_COMMIT} in my maven pom to write the commit information into my built artifacts but these variable are set to the branch being merged and its commit SHA-1.

Is there a way that I can find the SHA-1 of merged code and pass it into maven?

Answer 1

The Mojo’s Buildnumber Maven Plugin can fetch this information for you.

The project site has not been fully updated to reflect the fact that it works with GIT.

<build>
  <plugins>
    <plugin>
      <groupId>org.codehaus.mojo</groupId>
      <artifactId>buildnumber-maven-plugin</artifactId>
      <version>1.1</version>
      <executions>
        <execution>
          <phase>validate</phase>
          <goals>
            <goal>create</goal>
          </goals>
        </execution>
      </executions>
      <configuration>
        <doCheck>true</doCheck>
        <doUpdate>true</doUpdate>
      </configuration>
    </plugin>
  </plugins>
</build>

That will set the ${buildNumber} property to the full GIT hash of your workspace.

It also will have the side-effect of ensuring that the build is the same on either a developers machine or the CI build server.