Lexer can't handle underscore in string interpolation extractor

[987Nabil]

I am using sonar-scala (can't tell you the current version, sorry but I try to find out) and sbt-sonar 2.2.0 , which is using scalariform to parse the source code.
I am using plays sird syntax have some code that looks like this

case GET(p"/urlpart1/$_/urlpart2") =>

This leads to

[error] scalariform.lexer.ScalaLexerException: invalid string interpolation
[error] 	at scalariform.lexer.ScalaOnlyLexer$class.getStringPart(ScalaOnlyLexer.scala:253)
[error] 	at scalariform.lexer.ScalaLexer.getStringPart(ScalaLexer.scala:14)
[error] 	at scalariform.lexer.ScalaLexer.fetchStringInterpolationToken(ScalaLexer.scala:220)
[error] 	at scalariform.lexer.ScalaLexer.next(ScalaLexer.scala:194)
[error] 	at scalariform.lexer.ScalaLexer.next(ScalaLexer.scala:14)
[error] 	at scala.collection.Iterator$class.foreach(Iterator.scala:893)
[error] 	at scalariform.lexer.ScalaLexer.foreach(ScalaLexer.scala:14)
[error] 	at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
[error] 	at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:183)
[error] 	at scala.collection.mutable.ListBuffer.$plus$plus$eq(ListBuffer.scala:45)
[error] 	at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
[error] 	at scalariform.lexer.ScalaLexer.to(ScalaLexer.scala:14)
[error] 	at scala.collection.TraversableOnce$class.toList(TraversableOnce.scala:294)
[error] 	at scalariform.lexer.ScalaLexer.toList(ScalaLexer.scala:14)
[error] 	at com.sagacify.sonar.scala.Scala$.tokenize(ScalaPlugin.scala:31)
[error] 	at com.sagacify.sonar.scala.ScalaSensor$$anonfun$analyse$1.apply(ScalaSensor.scala:30)
[error] 	at com.sagacify.sonar.scala.ScalaSensor$$anonfun$analyse$1.apply(ScalaSensor.scala:26)
[error] 	at scala.collection.Iterator$class.foreach(Iterator.scala:893)
[error] 	at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
[error] 	at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
[error] 	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
[error] 	at com.sagacify.sonar.scala.ScalaSensor.analyse(ScalaSensor.scala:26)
[error] 	at org.sonar.scanner.phases.SensorsExecutor.executeSensor(SensorsExecutor.java:88)
[error] 	at org.sonar.scanner.phases.SensorsExecutor.execute(SensorsExecutor.java:82)
[error] 	at org.sonar.scanner.phases.SensorsExecutor.execute(SensorsExecutor.java:68)
[error] 	at org.sonar.scanner.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:88)
[error] 	at org.sonar.scanner.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:177)
[error] 	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:135)
[error] 	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:121)
[error] 	at org.sonar.scanner.scan.ProjectScanContainer.scan(ProjectScanContainer.java:291)
[error] 	at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:286)
[error] 	at org.sonar.scanner.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:284)
[error] 	at org.sonar.scanner.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:264)
[error] 	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:135)
[error] 	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:121)
[error] 	at org.sonar.scanner.task.ScanTask.execute(ScanTask.java:48)
[error] 	at org.sonar.scanner.task.TaskContainer.doAfterStart(TaskContainer.java:84)
[error] 	at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:135)
[error] 	at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:121)
[error] 	at org.sonar.scanner.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:121)
[error] 	at org.sonar.batch.bootstrapper.Batch.doExecuteTask(Batch.java:116)
[error] 	at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:71)
[error] 	at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:46)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
[error] 	at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
[error] 	at com.sun.proxy.$Proxy669.execute(Unknown Source)
[error] 	at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:189)
[error] 	at org.sonarsource.scanner.api.EmbeddedScanner.execute(EmbeddedScanner.java:138)
[error] 	at sbtsonar.SonarPlugin$.useEmbeddedScanner(SonarPlugin.scala:253)
[error] 	at sbtsonar.SonarPlugin$.$anonfun$projectSettings$5(SonarPlugin.scala:110)
[error] 	at sbtsonar.SonarPlugin$.$anonfun$projectSettings$5$adapted(SonarPlugin.scala:84)
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:67)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:281)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:19)
[error] 	at sbt.Execute.work(Execute.scala:290)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:281)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] 	at java.base/java.lang.Thread.run(Thread.java:830)
[error] (sonarScan) scalariform.lexer.ScalaLexerException: invalid string interpolation

If I replace the underscore with anything else, the error is gone.
But even with the underscore, it is valid scala code and compiles.

[mwz]

It appears that this project hasn't been maintained for over a year now, so you're probably not going to have much luck here.

I tried to fix another issue not that long ago (#287), but haven't had any response yet.