Scala-reflect not found - scala

I have a Kotlin based Gradle project, where I'm using Scala. All my dependencies are coming from the internal repository, so I cannot use any Scala version, but only the ones available.
Because of that I have the following list of dependencies:
plugins {
java
}
//...
apply(plugin = "scala")
//...
dependencies {
implementation("org.scala-lang.scala-reflect:2.12.5")
compileOnly("org.scala-lang.scala-library:2.12.9") {
exclude("org.scala-lang.scala-reflect")
}
On paper it should work - I defined dependencies available on internal nexus.
However, when I try to build the project, I'm getting the following error:
Execution failed for task ':compileScala'.
> Could not resolve all files for configuration ':zinc'.
> Could not find scala-reflect-2.12.10.jar (org.scala-lang.scala-reflect:2.10.10).
> Searched in the following locations:
<nexus_url>
Is it because of scala plugin?
UPDATE
I have checked that the error occurs, because the version of Zinc I have is built on top of Scala 2.12.10. And since the version is not available on the nexus, it cannot be ran.
Is there a way to change the Scala version Zinc is using?

After searching through Gradle Scala plugin documentation (https://docs.gradle.org/current/userguide/scala_plugin.html#sec:configure_zinc_compiler)
I have found the solution.
What I had to do was changing the Zinc version:
scala {
zincVersion.set("1.3.1")
}

Related

What scala-library dependenecy version can be used with Gradle 7.2 for Gatling performance testing

I am trying to do performance testing for my API using Gatling and Scala.
Below are the plugins/libraries I am using
gradle version : 7.2
gradle.plugin.com.github.lkishalmi.gatling:gradle-gatling-plugin:3.3.0
dependency : gatling 'org.scala-lang:scala-library:2.13.10'
I get the below error when I try to resolve dependencies
A problem occurred evaluating project ':performance-test'.
> Could not find method compile() for arguments [org.scala-lang:scala-library:2.13.10] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.
My guess is that the scala version 2.13.10 is not compatible with the gradle version 7.2. I tried changing the scala version to latest and many others, but nothing seems to work.
I have also seen another project using gradle 6.6 and scala version 2.12.2 which works. In my case I can't downgrade the gradle version, unfortunately.
Does anyone know what scala version is compatible with gradle 7.2?
The com.github.lkishalmi.gatling:gradle-gatling-plugin plugin has been deprecated for a long time. Please use the official plugin: https://gatling.io/docs/gatling/reference/current/extensions/gradle_plugin/

Compilation error in the Scala/Play example application for Heroku using Intellij

I am trying to compile the scala/Play framework example application on my local machine, but I am getting compilation errors when trying to compile using the SBT console in IntelliJ:
error: scala.reflect.internal.MissingRequirementError: object java.lang.Object in compiler mirror not found.
I also got this message in the event log related to different SBT versions:
14:48 Started sbt shell with sbt version 0.13.18 instead of 0.13.11 configured by project.
Update sbt version
Disable version override
Any suggestions on how to fix this?
For the first error
error: scala.reflect.internal.MissingRequirementError: object java.lang.Object in compiler mirror not found.
You might want to try and ensure that you are using a compatible java version. Like #cbley suggested, try making you are using version 8 of the JDK.
For the second error
14:48 Started sbt shell with sbt version 0.13.18 instead of 0.13.11 configured by project.
Update sbt version
Disable version override
Its just suggesting you update the version of sbt (which is most likely declared in your build.properties file in a folder called project. You can just search for it by double tapping shift in IntelliJ. But you are safe to ignore it if you cloned some example repository as well.
check

Gradle Scala plugin - How to specify scala version

How can I specify the Scala version in a Gradle Scala project?
The official documentation states that the scala-library dependency is used to get hold of the compiler.
dependencies {
compile 'org.scala-lang:scala-library:2.11.1'
}
Does this mean that Scala 2.11.1 will be used?
Specify the Scala library in the dependencies like so:
dependencies {
compile 'org.scala-lang:scala-library:2.11.1'
}

How to setup JUnit testing in Gluon Project with Gradle

I am trying to setup JUnit testing in my Gluon JavaFX Application. I am using the Gluon Eclipse Plugin with Gradle and Java 8.
My build.gradle file looks like this:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.javafxports:jfxmobile-plugin:1.0.0-b10'
}
}
apply plugin: 'org.javafxports.jfxmobile'
repositories {
jcenter()
}
dependencies {
compile 'com.gluonhq:ignite-dagger:1.0.0'
compile 'org.elasticsearch:elasticsearch:1.6.0'
compile 'ch.qos.logback:logback-classic:1.1.5'
testCompile 'junit:junit:4.12'
}
mainClassName = 'com.me.MyApplication'
jfxmobile {
android {
manifest = 'src/android/AndroidManifest.xml'
}
ios {
infoPList = file('src/ios/Default-Info.plist')
}
}
Resolving the dependency is no problem, but when running the 'test' task, gradle throws an error like this:
When running gradle with java 8, you must set the path to the old jdk, either with property retrolambda.oldJdk or environment variable JAVA6_HOME/JAVA7_HOME
Could not execute build using Gradle distribution 'https://services.gradle.org/distributions/gradle-2.2.1-all.zip'.
I already tried to add the retrolambda plugin to gradle according to the plugin's README on GitHub, but it doesn't work so far. Could someone tell me what to do to configure my Gluon project so that I am able to run my JUnit tests with Gradle?
Some important addidtions:
For the plugin version it says: Gluon Tools 1.0.0.201508201514
I think I fogot to mention that I want to use Dagger dependency injection with Gluon Ignite which might be the real problem in my case as it requires Java 8 and might conflict with javafxports or something else. However, I'm not able to make full sense of the various error messages I've seen.
My tests are empty, but they aren't even run, because it fails before.
Your problem seems like a retroLambda configuration issue. If you go through the configuration page for the plugin, it states that if you don't have an environment variable set for JAVA6_HOME or JAVA7_HOME than you need to explicitly define oldJdk for the plugin to work properly.

Can JetGradle Be Used In IntelliJ 12 Alongside Gradle Generated Project Files That Have Scala Facets?

I've been trying to make the switch to IntelliJ and Gradle for the Java/Scala projects at my company. From the command line Gradle has been great but I've run into a problem when using Gradle with IntelliJ and projects with Scala facets.
I've tried importing projects in both ways and the only one I've been able to get Scala facets working is to run:
gradle idea
using the Gradle IDEA plugin. After that all I need to do it open the ipr file for the project and the projects work fine.
However, there are some Gradle tasks that I would like to run from within IntelliJ for various things (code generation being the biggest one). I would like to be able to use JetGradle to run those tasks. The problem is when I link the Gradle project to JetGradle, the dependencies in each project break the Scala facet's compiler settings.
It's a multi-module project. Here is the build.gradle for the parent:
allprojects {
apply plugin: 'idea'
version = '1.0'
group = 'company-x'
repositories {
mavenCentral()
}
}
And here's the build.gradle for the scala modules:
apply plugin: 'scala'
dependencies {
compile 'org.scala-lang:scala-library:2.10.1',
'org.scala-lang:scala-reflect:2.10.1',
'org.scala-lang:scala-compiler:2.10.1',
'org.slf4j:slf4j-log4j12:1.7.2',
'com.typesafe.akka:akka-actor_2.10:2.1.4'
testCompile 'junit:junit:4.8.1',
'org.scalatest:scalatest:1.2'
}
Before linking the project to JetGradle the Scala facet is setup with a library called 'scala-compiler-2.10.1' that contains the Scala compiler, library, and reflect jars and src. After linking the project, the project libraries are replaced with all of the Gradle project dependencies. The Scala facet then gives the error:
Compiler library: no scala-library*.jar found
When I look at the libraries again, there is still a library called 'scala-compiler-2.10.1' but it's only the compiler. The library and reflect jars are now separated out.
Has anyone out there figured out how to get the Scala facet and JetGradle to play nicely with one another?
From this IntelliJ blog (Better Gradle Support in IntelliJ IDEA 12.1) it seems JetGradle is not ready to support Scala.
I'm waiting for IntelliJ 13.x and stick to Maven for the time being.