Comparing versions in sbt

Question

Is there a simple way to compare versions in sbt build files without handcrafting. E.g.

scalacOptions <++= scalaVersion { sv =>
  if (sv >= "2.10.0") "-feature" :: Nil else Nil
}

(The above compiles, but for some reason "2.9.2" >= "2.10.0" ... ?!)

I mean, don't tell me [this is the recommended way to compare versions](http://stackoverflow.com/questions/12626197/conditional-scalacoptions-with-sbt#12628568) — 0__, Jan 26 '13 at 19:23
Those are strings, you know... "2.9.2" _is_ greater than "2.10.0"! — Randall Schulz, Jan 26 '13 at 19:29
Yes I was surprised that by default an implicit `Ordering` with lexicographic rules seems to be in place. But surely sbt has some comparison function somewhere that breaks down the strings properly? — 0__, Jan 26 '13 at 19:30
Take a look at the way scalaz uses scalaVersion. It looks like they use pattern matching and not string comparisions: https://github.com/scalaz/scalaz/blob/master/project/ScalazBuild.scala — Noah, Jan 27 '13 at 01:35
`case "2.9.1" | "2.9.2" | "2.9.3-RC1" | "2.10.0" => ...` doesn't convince me — 0__, Jan 31 '13 at 19:11
Does this answer your question? [Conditional scalacOptions with SBT](https://stackoverflow.com/questions/12626197/conditional-scalacoptions-with-sbt) — Suma, Apr 22 '22 at 16:35

score 3 · Answer 1 · answered Jan 28 '13 at 00:34

3

semverfi is a Scala library that you can add to your project/plugins.sbt and it will be available for use in build definitions:

libraryDependencies += "me.lessis" %% "semverfi" % "0.1.2"

answered Jan 28 '13 at 00:34

Mark Harrah

score 2 · Accepted Answer · answered Jun 13 '19 at 19:02

2

For example you can do

VersionNumber("2.12.5").matchesSemVer(SemanticSelector(">=2.12"))

answered Jun 13 '19 at 19:02

nafg

2 Answers2