I would like to have a different version of library in test scope.
I was hoping the simplified version of project descriptor could look like that.
Please mind it's a simplified view, in my real project it's more convoluted. I need to use dependencyOverrides to enforce certain library version.
import sbt._, Keys._
organization := "me"
name := "test"
version := "0.1"
libraryDependencies := Seq("ch.qos.logback" % "logback-classic" % "1.2.3")
dependencyOverrides := Seq(
"ch.qos.logback" % "logback-classic" % "1.2.2"
)
dependencyOverrides in Test := Seq(
"ch.qos.logback" % "logback-classic" % "1.2.1"
)
I'd be hoping to see logback-classic version 1.2.1 when I run:
show test:managedClasspath.
Instead I get logback-classic version 1.2.2 as if dependencyOverrides in Test was ignored.
At the same time when I run show Test/dependencyOverrides I get the expected result which is:
ch.qos.logback:logback-classic:1.2.1
Does anyone has a clue what am I missing in the relation between dependencyOverrides in Test scope and managedClasspath?
It appears the problem cannot be solve the way I imagined. The main reason is libraryDependencies and update are not scoped to configuration.
I think the best solution is in case I need a different version of library in some tests to extract those tests to a separate module with independent set of libraryDependencies.
Related
An example of this comes from a sample github project:
libraryDependencies ++= Seq(
"javax.servlet" % "servlet-api" % "2.5" % "provided->default",
...
}
I'm only vaguely clear on what the 'fourth column' in these configurations mean, but this is the first time I've seen either provided or provided->default, and it's unclear how I can go about finding what should be expected here in the documentation. Can anyone help explain this construct?
It means that your provided configuration depends on the default configuration of "java.servlet" % "servlet-api" % "2.5".
Maven scopes describe what these configurations or scopes mean.
For instance, if you're using a library to write your tests, you've probably come across something like "org.scalacheck" %% "scalacheck" % "1.13.2" % "test" or similar. Here, the second part of the configuration is omitted and refers to the default configuration (usually compile). Equivalently, you could write "org.scalacheck" %% "scalacheck" % "1.13.2" % "test->compile". It means that your test configuration depends on the default configuration of ScalaCheck: your tests need ScalaCheck on the class path to compile and run.
You may find more details in the Ivy documentation.
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?
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"
I am looking for a way to control what library dependency exported, and what not. Something along those lines:
"org.slf4j" % "slf4j-api" % "1.7.6" doNotExport
or perhaps at the point where the project is imported, like this:
lazy val main = Project(appName, file("."), settings = buildSettings)
.dependsOn(ProjectRef(uri("../Utils"), "Utils").exceptLibraryDependency(organization="org.slf4j"))
Is there anything like this in SBT?
Well, it all depends on configurations. Default configurations expose dependencies again. So similar behavior can be achieved like this:
val compileOnly = config("compileOnly").hide
ivyConfigurations += compileOnly
unmanagedClasspath in Compile ++=
update.value.select(configurationFilter(compileOnly.name))
"org.slf4j" % "slf4j-api" % "1.7.6" % compileOnly
Note that this technique was descibed in an answer to Add a compile time only dependency in sbt.
This question should be closed as a duplicate, but the bounty prevents this.
After many struggles I finally got a large project converted over from Maven to SBT. One of the remaining issues, however, is that some of the unit tests in the project use jMockit which can be a bit high-maintenance when it comes to configuring the environment.
Specifically the jmockit dependency/jar has two difficult requirements:
The jmockit jar must appear in the classpath before the junit jar
On many JVM's, such as the OpenJDK one I'm using, the JVM argument -javaagent:<path/to/jmockit.jar> is required
If both of these conditions are not met, I'm faced with the error:
[error] Test <mytestclass>.initializationError failed: java.lang.Exception: Method <mytestmethod> should have no parameters
[error] at mockit.integration.junit4.JMockit.<init>(JMockit.java:32)
I think I eventually managed to take care of #1 with SBT but I'm still having trouble with the second one. The debug SBT logs do not show enough detail about the forked process invocation to tell me if my settings are working or not. But the test output consistently indicates that it's not working. I have what I think are all the relevant settings:
lazy val myproj = Project(
...
settings = otherSettings ++ Seq(
libraryDependencies ++= Seq(
"com.googlecode.jmockit" % "jmockit" % "1.7" % "test",
"junit" % "junit" % "4.8.1" % "test"
),
fork in Test := true,
javaOptions in test += "-javaagent:<hardcode-path-to-jmockit.jar>"
)
I think the classpath is OK based on the output of the test:dependencyClasspath:
sbt> project <myproject>
sbt> show test:dependencyClasspath
[info] List(...., Attributed(/var/build/ivy2/cache/junit/junit/jars/junit-4.8.1.jar), ...
..., Attributed(/var/build/ivy2/cache/com.googlecode.jmockit/jmockit/jars/jmockit-1.7.jar), ...)
So I'm thinking that my javaagent setting is not having the intended result.
If I do happen to get this to work, my next question is how to get the hard-coded jmockit.jar path out of there but for now I'll settle for a passing test case.
So, how do I set the JVM options used for testing? How do I view/verify what options are actually used when the tests are launched?
You need to change your javaOptions to javaOptions in Test (note the T in Test is capitalized).
You can check your options by executing show test:javaOptions
> show test:javaOptions
[info] List(-javaagent:/home/lpiepiora/.ivy2/cache/com.googlecode.jmockit/jmockit/jars/jmockit-1.7.jar)
Additionally if you want to use dynamic path to the jmockit jar, you can set your javaOptions like this:
def jmockitPath(f: Seq[File]) = f.filter(_.name.endsWith("jmockit-1.7.jar")).head
javaOptions in Test += s"-javaagent:${jmockitPath((dependencyClasspath in Test).value.files)}"
build.sbt for reference
libraryDependencies += "com.novocode" % "junit-interface" % "0.9" % "test"
libraryDependencies ++= Seq(
"com.googlecode.jmockit" % "jmockit" % "1.7" % "test",
"junit" % "junit" % "4.8.1" % "test"
)
fork in Test := true
def jmockitPath(f: Seq[File]) = f.filter(_.name.endsWith("jmockit-1.7.jar")).head
javaOptions in Test += s"-javaagent:${jmockitPath((dependencyClasspath in Test).value.files)}"
I am trying to import akka.dispatch.Future in my class but the compiler is unable to find that particular package. The one that it's able to find is akka.dispatch.Futures.
Can somebody point out what I might be doing wrong? My build.sbt is as follows:
name := "SomeApp"
version := "0.1"
scalaVersion := "2.10.1"
libraryDependencies ++= Seq("com.typesafe.akka" %% "akka-actor" % "2.1.2")
It's all in the docs: http://doc.akka.io/docs/akka/2.1.2/project/migration-guide-2.0.x-2.1.x.html
See the "Pieces Moved to Scala Standard Library" section.