Dynamic Pre-Release-Versioning

[triplem]

New plugin motivation

In Java-Projects it is quite common, that pre-release-versions are marked with the -SNAPSHOT suffix. Since the whole Java (Maven/gradle) eco-system depends on this highly opinionated suffix, it would be good, to be able to support this in the semantic-release system, probably by an own plugin.

Right now the versioning of prereleasse-versions with the pre-release "SNAPSHOT" would produce something like "SNAPSHOT.2", but it would be great to customize this, so that the incremented number is not on the end but before the suffix (eg. -2-SNAPSHOT).

As an additonal feature, it would be great to be able to attach additional information to the version, like eg. the current datetime and/or thea commit-id. So with this, the version could look something like ---SNAPSHOT.

At best, this could be done via a regular expression in the prerelease-property, but an additonal plugin-like system could be used as well.

What do you think?

[ifalex]

Would be also interested in such feature.
While looking through the code, get-next-release for prerelease shouldn't be hardcoded. Is there any option to replace branch name with an env variable? Or commit short sha?