Add git commit id in fat jar manifest using sbt

Question

I am using sbt-assembly plugin to build a fat Jar for my scala project. Is there a way I can include git commit id in the jar manifest, something similar to what git-commit-id-plugin does for maven.

Thanks

Answer 1

Old question but there I go...

You could use sbt-git plugin with sbt-assembly for including git information in your MANIFEST.MF file.

For adding information to your MANIFEST.MF file you can use the packageOptions sbt key in this way:

import sbt.Package.ManifestAttributes
import com.typesafe.sbt.SbtGit.git
packageOptions := Seq(ManifestAttributes(("Repository-Commit", git.gitHeadCommit.value.get)))

See example over here: spark-authorizer

This information will be stored in your MANIFEST.MF file included in the fat jar generated by sbt-assembly :

Manifest-Version: 1.0 
Implementation-Title: spark-authorizer
Repository-Commit: 12538262c1be14800eb820163de6c46cdbd69c99
Implementation-Version: 0.1.0-SNAPSHOT
Specification-Vendor: de.example.playground.spark.authorizer
Specification-Title: spark-authorizer
Implementation-Vendor-Id: de.example.playground.spark.authorizer
Specification-Version: 0.1.0-SNAPSHOT
Implementation-Vendor: de.example.playground.spark.authorizer

You can add as many values as you want to packageOptions. All of them will be included in the MANIFEST.MF file.