Automatically update property project.build.outputTimestamp at release time

[Jurrie]

I am trying to get my build to be reproducible. For this, you have to supply the project.build.outputTimestamp property. This property needs to be updated at release time.

The maven-release-plugin already does this. This is implemented in cfcc8ca59e483. Maybe gitflow-maven-plugin can implement the same?

[aleksandr-m]

@Jurrie Thanks for pointing this out!
Do you think project.build.outputTimestamp should be updated on release-start also, or only when finishing a release?

[Jurrie]

Hi @aleksandr-m, I don't know :) I'm currently trying to get our build to be reproducible, updating plugins etc. I'm not yet at the point where I want to update this property.

I think gitflow-maven-plugin should follow maven-release-plugin here as much as possible. The Maven guide states that the maven-release-plugin updates this property in the same commit where it updates the version. I don't actually know if the property will be updated again when the version is set to -SNAPSHOT.

[aleksandr-m]

1.16.0 is released.