Make dirty mark configurable

[BadHorseMonkey]

What happened?

I'm looking for something that approximates subversion, which uses a dirty mark of 'M'.

I can get this via git describe on the command line

 git describe --tags --always --first-parent --dirty=M --abbrev=0
r25718M

[sbaier1]

seems like you would only have to make https://github.com/palantir/gradle-git-version/blob/develop/src/main/java/com/palantir/gradle/gitversion/VersionDetailsImpl.java#L51 configurable

[rocketraman]

Also, using git describe --tags --always --first-parent --dirty appends -dirty as opposed to .dirty like this plugin.