Scalavista, or Scala Syntax (official) - these are the Scala extensions I have.
I have in build.sbt e.g.
, "org.scalatra" %% "scalatra-json" % "latest.integration"
and when I write
import org.scalatra.json._
then it marks it as an error and says object scalatra is not a member of package org. And it's just one example, my code is full of red waves. And that's only in vscode; when I run the program from sbt, it compiles and works OK.
Shouldn't it be aware of the dependencies?
You should install the sbt-scalavista SBT plugin in order to let it generate the scalavista config for your project.
Related
I'm using IntelliJ, and the sbt shell. I added an external jar to my project via Project Structure, and then ran sbt assembly. My code looks something like this:
package myPackage
import com.myExternalPackage.stuff
// implementation using com.myExternalPackage.stuff
IntelliJ recognizes this external jar and there are no red lines in the IDE. If I CTRL-click on myExternalPackage in the editor, it even opens up the exact place in External Libraries where the package is coming from.
But sbt assembly complains that
object myExternalPackage is not a member of package com
Do I need to do something to my build.sbt? Other people in my company are using this code without a problem.
In your build.sbt, you should have:
libraryDependencies ++= Seq(
"com.myExternalPackage" % "xxxx" % "version"
)
I'm following this tutorial to create a scala jar to upload to streamsets to use in a spark evaluator.
I'm using Intellij 2017.3.4.
If I use Intellij to build the artifact into the out folder, it's over 100mb in size.
If i use the 'sbt clean package' option from the command line, the jar is 3mb.
They both work fine.
Could anyone tell me why there's such a difference, and how I'd setup my Intellij so I create the smaller version?
Thanks
Matt
Without further knowledge of your build.sbt and your IntelliJ settings I can only guess that your build.sbt contains a line like this:
libraryDependencies += "org.apache.spark" %% "spark-core" % "2.3.0" % Provided
Notice the Provided. It means that spark is not bundled in the jar that sbt prepares, but is expected to already be present at the server in which you run your program (on your class path).
IntelliJ uses all the jars (including those marked provided) so that you can debug/run your program via IntelliJ. Since you did not add your build settings in IntelliJ this is the best I can do for now.
If you use sbt assembly to package your artifact, and you want to do this with a run configuration in IntelliJ you can go to Run/Debug Configurations, click the + button, select sbt task and fill in assembly as the task.
Read more about packaging your spark app here.
I hope that helps :)
I'm trying to run Specs2 tests from IDEA from both Windows and Mac versions of Intellij IDEA 14. I generated the idea project files using both gen-idea and the built in SBT plugin and get the same results...
When I try to run them, I get
Error running Specs2 in 'scala': Test class not found
I've added packages and switched "search for tests" to in single module but still no avail. I also get the message below on the run config.
Multiple suite traits detected: List(ScTrait: SpecificationStructure, ScTrait: SpecificationStructure,)
The similar post How to run all Specs2 tests under IntelliJ IDEA? doesn't help and it all runs fine from SBT, BTW. I can't run individual tests via the short-cut either :'(
I'm suspecting it's a combination of scalamock and specs2, as if I remove the following from my build.sbt, I can run them again.
"org.scalamock" %% "scalamock-specs2-support" % "3.2" % "test"
Here's the run config.
You should check if you have multiple specs2 jars dependencies in your module. If you just leave one jar dependency the configuration error should disappear.
To help other googlers, it could also be that you have one package depending on specs2-core, and scalamock-specs2-support which depends on specs2. The solution is to add an explicit dependency on specs2, and both dependencies should be evicted to the one you import. I was just able to fix this with the following dependency: "org.specs2" %% "specs2" % "3.7" % "test"
I have written a Scala program with Eclipse Scala IDE that uses scala.util.parsing.JSON and I would like to transform it to support Scala 2.11 version. In Scala 2.11 I get an error:
error: object parsing is not a member of package util.
I have found out that the parsing library is not anymore in the util package by default, but has to be downloaded separately here.
I have downloaded that and tried to add it to my Eclipse project as a new source folder, but that didn't work out. The instructions are only for adding it to sbt, but I don't think that is relevant to me if I want to just use it in Eclipse.
Should I try to find a JAR file somewhere?
Should I try to find a JAR file somewhere?
Yes, you should. :)
And specifically, you should use this one (in SBT syntax):
libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.0.2"
The above line should be all you need to add to build.sbt if you're using SBT. If you want to manually add it to your project by downloading it, you can find it on Maven Central.
The scala-parser-combinators library was removed in 2.11 so that people who don't use it don't have to pay a price for having it in the scala runtime library. Consequently, people who do want to use it have to now explicitly include it in their build. Note that the XML library was similarly removed in 2.11 to its own library.
is any IDE supporting SBT in a proper way (like Maven for example)? Because I've found a lot of tools that generate IDE-related configuration files but I haven't found any plugins that give any support of SBT interaction form within IDE.
I want to make an IDE-agnostic project based on SBT, but also I want to be able to use full spectrum of features that IDE provide and not just use it as an editor and do all the other stuff from console.
Does Intellij fit the bill ? It has an SBT plugin (and a Scala plugin, obviously!)
I know this isn't exactly what you're looking for, but putting it here as a work-around for working with SBT in eclipse for whoever is interested.
SBT generates eclipse config files, but after you import it, it works fine from within eclipse. You just need to set up the project for the first time outside of Eclipse, run SBT to resolve dependencies, generate eclipse structure using the eclipse sbt plugin and import into Eclipse. After that, you can run the code directly from Eclipse and it works fine.
Here're the steps in detail:
Create the folder structure as follows:
Create a file called plugins.sbt in the project folder and add the following line to it:
addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.1.0")
Create build.sbt in the root directory i.e. ScalaSBTProject with content similar to the following. I'm using akka here, but add and remove libraries as you require:
name := "ScalaSBTProject"
version := "1.0"
scalaVersion := "2.10.0-RC2"
resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"
libraryDependencies += "com.typesafe.akka" % "akka-cluster-experimental_2.10.0-RC2" % "2.1.0-RC2"
Open command prompt and run sbt in the directory ScalaSBTProject. SBT will download and resolve whatever dependencies are required
Run the command eclipse at the SBT command line. This will generate all the eclipse related project files
Import ScalaSBTProject into Eclipse using File->Import->Existing Project to workspace, and make sure you check Import into workspace
EDIT: Just as a Post-Script, you can quite easily create a batch file to take the name of the project and generate the eclipse compatible project, just a way to speed up the process.