使用 IntelliJ 设置 Scala

Question

I have Intellij ultimate 11.1, with the scala plugin installed.

I installed scala 2.9.2 using homebrew, which put scala in:

/usr/local/Cellar/scala/2.9.2>



>which scala
/usr/local/bin/scala
>scala -version
Scala code runner version 2.9.2 -- Copyright 2002-2011, LAMP/EPFL

Creating a new java module project, I get this:

Can someone help me fix these issues, why didn't the scala plugin make this work out of the box? :)

Answer 1

You need to specify /usr/local/Cellar/scala/2.9.2/libexec directory on your first screenshot. This is Mac brew specific, the same case is valid for grails installed via brew .

Standard Scala distribution download has different layout which IDEA understands correctly, brew is creating libexec directory where it writes /lib and /src directories expected by IDEA.

Answer 2

Updated for Intellij 11.1.5

Here's a step by step for any of those who are trying to get Scala in IntelliJ up and running.

Download Scala Plugin

IntelliJ > Preferences > Plugins > Browse Repositories... > Scala Click Ok and allow IntelliJ to restart

Download Scala

In Terminal enter

brew install scala --with-docs

Setup symbolic links for IntelliJ discovery process

ln -s /usr/local/Cellar/scala/<version>/libexec/src /usr/local/Cellar/scala/<version>/src
ln -s /usr/local/Cellar/scala/<version>/libexec/lib /usr/local/Cellar/scala/<version>/lib
mkdir -p /usr/local/Cellar/scala/<version>/doc/scala-devel-docs
ln -s /usr/local/Cellar/scala/<version>/share/doc/scala /usr/local/Cellar/scala/<version>/doc/scala-devel-docs/api

Create Project in IntelliJ

Here you are going to create a Java project from scratch as you normally would. However, in the last step, you will select Scala in the "Technologies" page.

In the Use Scala Distribution enter /usr/local/Cellar/scala/<version>

In the Compiler dropdown select scala-compiler

Click Ok and you are ready to create your first Scala object

For reference -> http://scalacookbook.blogspot.com/2012/09/scala-for-intellij.html

Answer 3

The latest Brew has already realized this problem and created automatic symlinks upon installing Scala.

Firstly, install Scala with Documentation

brew install scala --with-docs

Secondly, provide the following path in IntelliJ

/usr/local/opt/scala/idea

Answer 4

Rather than downloading the docs separately you can use the --with-docs option when installing scala with homebrew:

brew install scala --with-docs

Then in IntelliJ point your JavaDocs path in the scala-library to /usr/local/Cellar/scala/2.9.2/share/doc .

Answer 5

I'm just found another way to configure scala with intelJIdea. If scala installed with brew then just write in terminal:

brew info scala

you will see smth like that:

scala: stable 2.11.4 (bottled)
http://www.scala-lang.org/
/usr/local/Cellar/scala/2.11.4 (3401 files, 433M) *
  Built from source with: --with-docs
From: https://github.com/Homebrew/homebrew/blob/master/Library/Formula/scala.rb
==> Options
--with-docs
    Also install library documentation
--with-src
    Also install sources for IDE support
==> Caveats
To use with IntelliJ, set the Scala home to:
  /usr/local/opt/scala/idea

Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

Then just include /usr/local/opt/scala/idea into your idea config panel.

Answer 6

I am using Yosemite, and the following worked for me.

brew install scala --with-docs

Then I tested IntelliJ by creating a new project, using the Java SDK, and for compiler putting in:

/usr/local/Cellar/scala/[insertversion]/libexec

Here is what I see in IntelliJ when I created a new project with these settings

I tested compiling a Hello World program via this and it compiled correctly to the console.

Note, I ignored what @Zagorulkin said above even though it seems logical that if Homebrew is saying so my compile path should be different to the above.

Answer 7

Now is 2021 year. my (latest) environment is:

• IntelliJ IDEA : IntelliJ IDEA 2020.3.2 (Community Edition)
• OS : macOS 10.14.6

Steps to setup Scala using IntelliJ IEA

in Mac

• install scala using brew
  • brew install scala

in IntelliJ

• install Scala plugin
  • IntelliJ IDEA -> Preferences -> Plugins ->search: scala -> Search in Marketplace -> Install -> Restart IDE
    • 
• configure Java JDK + configure Scala SDK : when first time open *.scala file, will notice you:
  • Project JDK is not defined
    • click Setup SDK -> choose (your installed) Java 11
      • 
  • No Scala SDK in module
    • clcik Setup Scala SDK
      • Add Scala Support -> Use library -> Create -> Select JAR's for the new Scala SDK -> Click and choose Brew -> OK
        • 
      • Add Scala Support -> Use library -> (then) selected: scala-sdk-2.13.5 -> OK
        • 

finally can happy debug scala (file's class's main function):

Answer 8

将/usr/local/Cellar/scala/2.9.2更改为/usr/local/Cellar/scala/就可以了。