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POIntellij Idea 12 Ultimate cannot correctly import pom for Scala project
 

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    <p>I have a project I've been working with in Idea for weeks with no issues. I added a new maven dependency and it was not able to find the classes in it, even with maven re-import run, invalidating caches, etc. So, I started over by re-importing the pom - but now it cannot find ANY of the Scala symbols, even auto-imported Scala symbols. I have tried this multiple times with the same result. Here is the pom in question (with some details changed):</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;com.aa&lt;/groupId&gt; &lt;artifactId&gt;test-project&lt;/artifactId&gt; &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt; &lt;properties&gt; &lt;!-- Explicitly declaring the source encoding eliminates the following message: --&gt; &lt;!-- [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent! --&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;compiler.plugin.version&gt;2.3.1&lt;/compiler.plugin.version&gt; &lt;maven.compiler.target&gt;1.8&lt;/maven.compiler.target&gt; &lt;maven.compiler.source&gt;1.8&lt;/maven.compiler.source&gt; &lt;/properties&gt; &lt;dependencies&gt; &lt;!-- Scala --&gt; &lt;dependency&gt; &lt;groupId&gt;org.scala-lang&lt;/groupId&gt; &lt;artifactId&gt;scala-library&lt;/artifactId&gt; &lt;version&gt;2.10.1&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.scalatest&lt;/groupId&gt; &lt;artifactId&gt;scalatest_2.10.0&lt;/artifactId&gt; &lt;version&gt;2.0.M5&lt;/version&gt; &lt;/dependency&gt; &lt;!-- Akka --&gt; &lt;dependency&gt; &lt;groupId&gt;com.typesafe.akka&lt;/groupId&gt; &lt;artifactId&gt;akka-actor_2.10&lt;/artifactId&gt; &lt;version&gt;2.1.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.typesafe.akka&lt;/groupId&gt; &lt;artifactId&gt;akka-remote_2.10&lt;/artifactId&gt; &lt;version&gt;2.1.2&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.typesafe.akka&lt;/groupId&gt; &lt;artifactId&gt;akka-kernel_2.10&lt;/artifactId&gt; &lt;version&gt;2.1.2&lt;/version&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.scala-tools&lt;/groupId&gt; &lt;artifactId&gt;maven-scala-plugin&lt;/artifactId&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;compile&lt;/id&gt; &lt;goals&gt; &lt;goal&gt;compile&lt;/goal&gt; &lt;/goals&gt; &lt;phase&gt;compile&lt;/phase&gt; &lt;/execution&gt; &lt;execution&gt; &lt;id&gt;test-compile&lt;/id&gt; &lt;goals&gt; &lt;goal&gt;testCompile&lt;/goal&gt; &lt;/goals&gt; &lt;phase&gt;test-compile&lt;/phase&gt; &lt;/execution&gt; &lt;execution&gt; &lt;phase&gt;process-resources&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;compile&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;org.scalastyle&lt;/groupId&gt; &lt;artifactId&gt;scalastyle-maven-plugin&lt;/artifactId&gt; &lt;version&gt;0.2.0&lt;/version&gt; &lt;configuration&gt; &lt;verbose&gt;false&lt;/verbose&gt; &lt;failOnViolation&gt;true&lt;/failOnViolation&gt; &lt;includeTestSourceDirectory&gt;true&lt;/includeTestSourceDirectory&gt; &lt;failOnWarning&gt;false&lt;/failOnWarning&gt; &lt;sourceDirectory&gt;${basedir}/src/main/scala&lt;/sourceDirectory&gt; &lt;testSourceDirectory&gt;${basedir}/src/test/scala&lt;/testSourceDirectory&gt; &lt;configLocation&gt;${basedir}/src/main/resources/scalastyle_config.xml&lt;/configLocation&gt; &lt;outputFile&gt;${project.basedir}/scalastyle-output.xml&lt;/outputFile&gt; &lt;outputEncoding&gt;UTF-8&lt;/outputEncoding&gt; &lt;/configuration&gt; &lt;executions&gt; &lt;execution&gt; &lt;goals&gt; &lt;goal&gt;check&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt; &lt;version&gt;${compiler.plugin.version}&lt;/version&gt; &lt;configuration&gt; &lt;source&gt;${maven.compiler.source}&lt;/source&gt; &lt;target&gt;${maven.compiler.target}&lt;/target&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>I've been fighting with this for an hour now and am about at my wit's end. It builds fine from the command-line. But, again, nothing builds in Idea - it doesn't even see the symbols in scala.predef, etc.</p> <p>Enabling the Scala facet for the module doesn't make any difference either.</p> <p>I didn't find any reports of similar issues so perhaps I really am missing something.</p>
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    1. CORemoving the Scala facet then re-adding it with "Add Framework Support..." got me halfway there. I was still not able to get it to pick up maven dependencies (nothing special about them at all), so I finally resorted to adding them manually as Idea maven libraries in project structure. It's now building & running again. I guess this is why the Scala plugin is well < 1.0
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      1. USScala Newb
    2. COThis sounds like a bug I often experience on Java projects. My solution is to delete a character from the pom, let intellij process that mistake, then undo. This seems to force it to realize the dependencies in my project. See if that works for you.
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      1. USDaniel Kaplan
    3. CONo - I tried that too. Tried everything, including re-importing multiple times. I suspect this is specific to using the Scala plugin. Adding the dependencies as project libs is the workaround, but will be painful with lots of them.
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