How to force a specific version of dependency?

Question

A dependency bar depends on foo 1.2.3, but that version of foo has a bug and I need to use version 1.2.2.

I can do that with force().

libraryDependencies += "foo" %% "foo" % "1.2.2" force()

That method is not recommended by the docs:

Forcing a revision (Not recommended)

Note: Forcing can create logical inconsistencies so it’s no longer recommended.

Does this mean SBT has a different, better way than force() to use a specific version of a dependency? If so, what?

Or am I to infer from the documentation that this entire problem is one that I'm recommended not to have?

Answer 1

you can use dependencyOverrides:

dependencyOverrides += "foo" %% "foo" % "1.2.2" 

You're not avoiding "logical inconsistencies" anyway. If you force a version, you have to manually take care of compatibility with other libraries, there's no way out of that.

From the documentation:

Overriding a version

For binary compatible conflicts, sbt provides dependency overrides. They are configured with the dependencyOverrides setting, which is a set of ModuleIDs. For example, the following dependency definitions conflict because spark uses log4j 1.2.16 and scalaxb uses log4j 1.2.17:

libraryDependencies ++= Seq(   "org.spark-project" %% "spark-core" % "0.5.1",       "org.scalaxb" %% "scalaxb" % "1.0.0" )  

The default conflict manager chooses the latest revision of log4j, 1.2.17:

show update  [info] compile:  [info]    log4j:log4j:1.2.17: ... ...  [info]    (EVICTED) log4j:log4j:1.2.16 ...  

To change the version selected, add an override:

dependencyOverrides += "log4j" % "log4j" % "1.2.16"