add detailed error config (#71) (#142)

* add detailed error config (#71)

* alter name of detailed error config (#71)

* fix compilation errors and format changes (#71)

Co-authored-by: Muhammed Behram <muhammed.behram@cimri.com>

plugin/src/main/scala/org/scalafmt/sbt/ScalafmtPlugin.scala

@@ -62,6 +62,10 @@ object ScalafmtPlugin extends AutoPlugin {
       "Execute the scalafmtCheck task for all configurations in which it is enabled. " +
         "(By default this means the Compile and Test configurations.)"
     )
+    val scalafmtDetailedError =
+      settingKey[Boolean](
+        "Enables logging of detailed errors with stacktraces, disabled by default"
+      )
   }
 
   import autoImport._
@@ -100,11 +104,12 @@ object ScalafmtPlugin extends AutoPlugin {
       config: Path,
       log: Logger,
       writer: OutputStreamWriter,
-      resolvers: Seq[Resolver]
+      resolvers: Seq[Resolver],
+      detailedErrorEnabled: Boolean
   )(
       onFormat: (File, Input, Output) => T
   ): Seq[Option[T]] = {
-    val reporter = new ScalafmtSbtReporter(log, writer)
+    val reporter = new ScalafmtSbtReporter(log, writer, detailedErrorEnabled)
     val repositories = resolvers.collect {
       case r: MavenRepository => r.root
     }
@@ -147,7 +152,8 @@ object ScalafmtPlugin extends AutoPlugin {
       config: Path,
       log: Logger,
       writer: OutputStreamWriter,
-      resolvers: Seq[Resolver]
+      resolvers: Seq[Resolver],
+      detailedErrorEnabled: Boolean
   ): Unit = {
     trackSourcesAndConfig(cacheStoreFactory, sources, config) {
       (outDiff, configChanged, prev) =>
@@ -162,7 +168,14 @@ object ScalafmtPlugin extends AutoPlugin {
           }
         if (filesToFormat.nonEmpty) {
           log.info(s"Formatting ${filesToFormat.size} Scala sources...")
-          formatSources(filesToFormat, config, log, writer, resolvers)
+          formatSources(
+            filesToFormat,
+            config,
+            log,
+            writer,
+            resolvers,
+            detailedErrorEnabled
+          )
         }
         ScalafmtAnalysis(Set.empty)
     }
@@ -173,10 +186,18 @@ object ScalafmtPlugin extends AutoPlugin {
       config: Path,
       log: Logger,
       writer: OutputStreamWriter,
-      resolvers: Seq[Resolver]
+      resolvers: Seq[Resolver],
+      detailedErrorEnabled: Boolean
   ): Unit = {
     val cnt =
-      withFormattedSources(sources.toSeq, config, log, writer, resolvers)(
+      withFormattedSources(
+        sources.toSeq,
+        config,
+        log,
+        writer,
+        resolvers,
+        detailedErrorEnabled
+      )(
         (file, input, output) => {
           if (input != output) {
             IO.write(file, output)
@@ -199,7 +220,8 @@ object ScalafmtPlugin extends AutoPlugin {
       config: Path,
       log: Logger,
       writer: OutputStreamWriter,
-      resolvers: Seq[Resolver]
+      resolvers: Seq[Resolver],
+      detailedErrorEnabled: Boolean
   ): ScalafmtAnalysis = {
     trackSourcesAndConfig(cacheStoreFactory, sources, config) {
       (outDiff, configChanged, prev) =>
@@ -213,7 +235,14 @@ object ScalafmtPlugin extends AutoPlugin {
           else prev.failedScalafmtCheck & outDiff.unmodified
         prevFailed foreach { warnBadFormat(_, log) }
         val result =
-          checkSources(filesToCheck.toSeq, config, log, writer, resolvers)
+          checkSources(
+            filesToCheck.toSeq,
+            config,
+            log,
+            writer,
+            resolvers,
+            detailedErrorEnabled
+          )
         prev.copy(
           failedScalafmtCheck = result.failedScalafmtCheck | prevFailed
         )
@@ -239,13 +268,21 @@ object ScalafmtPlugin extends AutoPlugin {
       config: Path,
       log: Logger,
       writer: OutputStreamWriter,
-      resolvers: Seq[Resolver]
+      resolvers: Seq[Resolver],
+      detailedErrorEnabled: Boolean
   ): ScalafmtAnalysis = {
     if (sources.nonEmpty) {
       log.info(s"Checking ${sources.size} Scala sources...")
     }
     val unformatted =
-      withFormattedSources(sources, config, log, writer, resolvers)(
+      withFormattedSources(
+        sources,
+        config,
+        log,
+        writer,
+        resolvers,
+        detailedErrorEnabled
+      )(
         (file, input, output) => {
           val diff = input != output
           if (diff) {
@@ -330,7 +367,8 @@ object ScalafmtPlugin extends AutoPlugin {
         scalaConfig.value,
         streams.value.log,
         outputStreamWriter(streams.value),
-        fullResolvers.value
+        fullResolvers.value,
+        scalafmtDetailedError.value
       )
     } tag (ScalafmtTagPack: _*)
 
@@ -341,14 +379,16 @@ object ScalafmtPlugin extends AutoPlugin {
         sbtConfig.value,
         streams.value.log,
         outputStreamWriter(streams.value),
-        fullResolvers.value
+        fullResolvers.value,
+        scalafmtDetailedError.value
       )
       formatSources(
         metabuildSources.value.toSet,
         scalaConfig.value,
         streams.value.log,
         outputStreamWriter(streams.value),
-        fullResolvers.value
+        fullResolvers.value,
+        scalafmtDetailedError.value
       )
     } tag (ScalafmtTagPack: _*)
 
@@ -360,7 +400,8 @@ object ScalafmtPlugin extends AutoPlugin {
         scalaConfig.value,
         streams.value.log,
         outputStreamWriter(streams.value),
-        fullResolvers.value
+        fullResolvers.value,
+        scalafmtDetailedError.value
       )
       trueOrBoom(analysis)
     } tag (ScalafmtTagPack: _*)
@@ -373,7 +414,8 @@ object ScalafmtPlugin extends AutoPlugin {
           sbtConfig.value,
           streams.value.log,
           outputStreamWriter(streams.value),
-          fullResolvers.value
+          fullResolvers.value,
+          scalafmtDetailedError.value
         )
       )
       trueOrBoom(
@@ -382,7 +424,8 @@ object ScalafmtPlugin extends AutoPlugin {
           scalaConfig.value,
           streams.value.log,
           outputStreamWriter(streams.value),
-          fullResolvers.value
+          fullResolvers.value,
+          scalafmtDetailedError.value
         )
       )
     } tag (ScalafmtTagPack: _*)
@@ -420,7 +463,8 @@ object ScalafmtPlugin extends AutoPlugin {
         scalaConfig.value,
         streams.value.log,
         outputStreamWriter(streams.value),
-        fullResolvers.value
+        fullResolvers.value,
+        scalafmtDetailedError.value
       )
     }
   )
@@ -446,7 +490,8 @@ object ScalafmtPlugin extends AutoPlugin {
 
   override def globalSettings: Seq[Def.Setting[_]] =
     Seq(
-      scalafmtOnCompile := false
+      scalafmtOnCompile := false,
+      scalafmtDetailedError := false
     )
 
 }

plugin/src/main/scala/org/scalafmt/sbt/ScalafmtSbtReporter.scala

@@ -3,24 +3,27 @@ package org.scalafmt.sbt
 import java.io.PrintWriter
 import java.io.OutputStreamWriter
 import java.nio.file.Path
-
 import org.scalafmt.interfaces.ScalafmtReporter
 import sbt.internal.util.MessageOnlyException
 import sbt.util.Logger
 
 import scala.util.control.NoStackTrace
 
-class ScalafmtSbtReporter(log: Logger, out: OutputStreamWriter)
-    extends ScalafmtReporter {
+class ScalafmtSbtReporter(
+    log: Logger,
+    out: OutputStreamWriter,
+    detailedErrorEnabled: Boolean
+) extends ScalafmtReporter {
   override def error(file: Path, message: String): Unit = {
     throw new MessageOnlyException(s"$message: $file")
   }
 
   override def error(file: Path, e: Throwable): Unit = {
-    if (e.getMessage != null) {
-      error(file, e.getMessage)
-    } else {
-      throw new FailedToFormat(file.toString, e)
+    Option(e.getMessage) match {
+      case Some(_) if detailedErrorEnabled =>
+        throw new ScalafmtSbtError(file, e)
+      case Some(_) => error(file, e.getMessage)
+      case None => throw new FailedToFormat(file.toString, e)
     }
   }
 
@@ -44,4 +47,7 @@ class ScalafmtSbtReporter(log: Logger, out: OutputStreamWriter)
   private class FailedToFormat(filename: String, cause: Throwable)
       extends Exception(filename, cause)
       with NoStackTrace
+
+  private class ScalafmtSbtError(file: Path, cause: Throwable)
+      extends Exception(s"sbt-scalafmt failed on $file", cause)
 }