scala - Re-download a SNAPSHOT version of a dependency using SBT

Question

I have the following lines in my build.sbt file.

resolvers += "specs2 snapshot repo" at "http://scala-tools.org/repo-snapshots"

libraryDependencies += "org.specs2" %% "specs2" % "1.7-SNAPSHOT" % "test"

Now if the snapshot has changed (is this reasonable at all, that a maven SNAPSHOT version changes without its version number changing?), how can I tell sbt to download the new version? Using update does nothing.

Answer 1

you should try :

libraryDependencies += "org.specs2" %% "specs2" % "1.7-SNAPSHOT" % "test" changing()

changing() will specify that the dependency can change and that it ivy must download it on each update.

Maybe you could also try to define your repository using ivyXML. Something like this :

ivyXML :=
  <resolvers>
    ????<ibiblio name="specs2 snapshot repo" changingPattern="*-SNAPSHOT" m2compatible="true" root="http://scala-tools.org/repo-snapshots"/>
  </resolvers>

Hope this will help.