How to find out where sbt resolves dependencies from?

Question

I am using sbt 0.12 RC2.

My project has a bunch of library dependencies, and some of these trigger other dependencies. Some of these dependencies are unmanaged (in lib/), some are in my local .ivy2 repository, some are found in various remote repositories.

I'm looking for an sbt update-verbose or similar that will tell me exactly where sbt found each JAR file when it says:

[info] Resolving com.nicta#sbt-scoobi;0.0.1 ...
[info] Resolving org.scala-lang#scala-library;2.9.2 ...
[info] Resolving org.apache.opennlp#opennlp-maxent;3.0.1-incubating ...
[info] Resolving jwnl#jwnl;1.3.3 ...

Answer 1

sbtgenerates a very extensive report on how exactly the dependencies were resolved in target/resolution-cache/reports. Open one of the .xml files in a web browser, and you should see all the detail you need.

Answer 2

I'm not sure if this applies to sbt 0.12.x, but in 0.13.x, if you can find where your library lives in in the ~/.ivy/cache/... directory structure, the library's parent directory has a file named ivydata-x.y.z.properties which contains the URL where it found the dependency.

For example, if you cache for akka-streams looks like this:

.ivy2
└── cache
    └── com.typesafe.akka
        └── akka-stream_2.11
            ├── docs
            │   └── akka-stream_2.11-2.4.14-javadoc.jar
            ├── jars
            │   └── akka-stream_2.11-2.4.14.jar
            └── srcs
                └── akka-stream_2.11-2.4.14-sources.jar

you should find a file like this, containing download URL:

.ivy2
└── cache
    └── com.typesafe.akka
        └── akka-stream_2.11
            └──ivydata-2.4.14.properties

Answer 3

You can use show compile:dependency-classpath to show where the depedencies are