How to get IntelliJ to recognize imports in Scala script?

Question

I'm having trouble getting IntelliJ to recognize Ammonite imports in my Scala script. This is a new feature, reported here, where there are also instructions. I followed the instructions and I started a new sbt project in IntelliJ to try it out, but it's not working.

I see the Ammonite dependencies in the project's "External Libraries", which I specified in the build.sbt: libraryDependencies += "com.lihaoyi" %% "ammonite-ops" % "1.0.3" libraryDependencies += "com.lihaoyi" % "ammonite" % "1.0.3" cross CrossVersion.full

The (quite simple) project seems to successfully build. I also specified that Scala worksheet files should be treated as "Always Ammonite".

All this, yet the IDE shows the script like:

What more do I need to do to get this to work?

Versions:

• Java 1.8.0
• Scala 2.12.4
• sbt 1.0.3
• IntelliJ CE 2017.3.2
• IntelliJ scala plugin 2017.3.11

Answer 1

I think IntelliJ IDEA won't find a dependency in a local cache if you're working mostly with Scala 2.13 and SBT 1.3+ with the Coursier library management. We need to help IntelliJ IDEA by downloading dependencies to the Ivy cache.

I solved this issue by:

1. Creating the ivy.xml somewhere with required dependencies, e.g:

   <ivy-module version="1.0">
       <info organisation="test" module="download-deps"/>
       <dependencies>
           <dependency org="com.softwaremill.sttp.client" name="core_2.12" rev="2.1.1"/>
           <dependency org="com.softwaremill.sttp.client" name="okhttp-backend_2.12" rev="2.1.1"/>
           <dependency org="com.github.tototoshi" name="scala-csv_2.12" rev="1.3.6"/>
       </dependencies>
   </ivy-module>
   

   Note, I specified Scala 2.12 here.

2. Running ivy -refresh from the directory with the created ivy.xml.

3. Then we need is to "Create library from jar..." from the red import's context actions in IntelliJ IDEA.

That's all!