the + in version is not compatible with docker tags

[xelax]

When combining sbt-dynver with sbt-native-packager it creates versions that are not compatible with docker tag names:
"A tag name may contain lowercase and uppercase characters, digits, underscores, periods and dashes. A tag name may not start with a period or a dash and may contain a maximum of 128 characters."

this is the error I am getting:

invalid argument "blah.com/real-mine:1.0.0+5-abeb6d22" for t: Error parsing reference: "blah.com/real-mine:1.0.0+5-abeb6d22" is not a valid repository/tag

[dwijnand]

Using + for me is one of the benefits over git describe as it conveys the meaning much clearly.

But I think I can structure the data that forms the version such that you can define the final version string any way you want.

[daddykotex]

I use sbt-docker but could solve the issue by adding this to my build:

imageNames in docker := {
  (imageNames in docker).value.map(img => img.copy(tag = img.tag.map(_.replace("+", "_"))))
}

Note that imageNames is already filled here by a internal plugin. There are two images one with the tag latest and one with the version. Here I simply override the settings with the current value but I replace any + in the tag.

There is probably a similar way to do this with sbt-native-packager.

[dwijnand]

Hi all,

The solution, as documented in the top half of https://github.com/dwijnand/sbt-dynver#custom-version-string is to post-process, like so:

version in ThisBuild ~= (_.replace('+', '-'))
 dynver in ThisBuild ~= (_.replace('+', '-'))

See the rest of https://github.com/dwijnand/sbt-dynver#custom-version-string for guidance if you want/need a more sophisticated solution.