Uncaught exception in the intellij plugin when switching to a branch that does not have the config.yml

[Pasukaru]

I just setup detekt in our project and also installed and enabled the IntelliJ Plugin.
After switching to a branch that was not having the detekt.yml, intellij caught this error from the plugin:

annotator: io.gitlab.arturbosch.detekt.DetektAnnotator@7547cc76 (class io.gitlab.arturbosch.detekt.DetektAnnotator)

com.beust.jcommander.ParameterException: Provided path '<snip-full-path-to-project>/detekt.yml' does not exist!
	at io.gitlab.arturbosch.detekt.cli.ExistingPathConverter.convert(PathConverters.kt:19)
	at io.gitlab.arturbosch.detekt.cli.ExistingPathConverter.convert(PathConverters.kt:15)
	at io.gitlab.arturbosch.detekt.cli.DetektInputPathConverter$convert$2.invoke(PathConverters.kt:35)
	at io.gitlab.arturbosch.detekt.cli.DetektInputPathConverter$convert$2.invoke(PathConverters.kt:30)
	at kotlin.sequences.TransformingSequence$iterator$1.next(Sequences.kt:174)
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:691)
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:721)
	at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:712)
	at io.gitlab.arturbosch.detekt.cli.DetektInputPathConverter$DefaultImpls.convert(PathConverters.kt:36)
	at io.gitlab.arturbosch.detekt.cli.MultipleExistingPathConverter.convert(PathConverters.kt:45)
	at io.gitlab.arturbosch.detekt.cli.ConfigurationsKt.parsePathConfig(Configurations.kt:56)
	at io.gitlab.arturbosch.detekt.cli.ConfigurationsKt.loadConfiguration(Configurations.kt:31)
	at io.gitlab.arturbosch.detekt.DetektAnnotator.processingSettings(DetektAnnotator.kt:94)
	at io.gitlab.arturbosch.detekt.DetektAnnotator.runDetekt(DetektAnnotator.kt:62)
	at io.gitlab.arturbosch.detekt.DetektAnnotator.doAnnotate(DetektAnnotator.kt:51)
	at io.gitlab.arturbosch.detekt.DetektAnnotator.doAnnotate(DetektAnnotator.kt:29)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.doAnnotate(ExternalToolPass.java:184)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass.access$600(ExternalToolPass.java:40)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.lambda$run$1(ExternalToolPass.java:158)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$runUnderDisposeAwareIndicator$10(BackgroundTaskUtil.java:244)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$3(CoreProgressManager.java:180)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:164)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:582)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:87)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:151)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:180)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:264)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.runUnderDisposeAwareIndicator(BackgroundTaskUtil.java:243)
	at com.intellij.codeInsight.daemon.impl.ExternalToolPass$1.run(ExternalToolPass.java:157)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:336)
	at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:326)
	at com.intellij.util.ui.update.MergingUpdateQueue.lambda$flush$1(MergingUpdateQueue.java:276)
	at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:290)
	at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:245)
	at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:232)
	at com.intellij.util.Alarm$Request.runSafely(Alarm.java:356)
	at com.intellij.util.Alarm$Request.run(Alarm.java:343)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:228)
	at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:227)
	at com.intellij.util.concurrency.BoundedTaskExecutor.access$100(BoundedTaskExecutor.java:26)
	at com.intellij.util.concurrency.BoundedTaskExecutor$2$1.run(BoundedTaskExecutor.java:200)
	at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:229)
	at com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:194)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

Expected Behavior

• Show a warning that the configuration file was not found.
• Use detekt's default values as fallback.

Observed Behavior

IntelliJ caught an exception and showed the 'IDE Fatal Errors' dialog with the exception above.

Steps to Reproduce

• Create a valid detekt.yml file in the project
• Install and setup the IntelliJ detekt plugin to use that file
• Use git to switch to a branch that does not have the detekt.yml file

Environment

------------------------------------------------------------
Gradle 4.9
------------------------------------------------------------

Build time:   2018-07-16 08:14:03 UTC
Revision:     efcf8c1cf533b03c70f394f270f46a174c738efc

Kotlin DSL:   0.18.4
Kotlin:       1.2.41
Groovy:       2.4.12
Ant:          Apache Ant(TM) version 1.9.11 compiled on March 23 2018
JVM:          11.0.1 (Oracle Corporation 11.0.1+13)
OS:           Mac OS X 10.13.6 x86_64

[Mauin]

Thank you for the report. As you mention this is a bug in the IntelliJ Plugin this issue should be moved to the according repository: https://github.com/arturbosch/detekt-intellij-plugin