Add -convertedonly argument

Closes #2

README.md

@@ -16,6 +16,7 @@ Options:
 -vbr quality             VBR quality (1-5 for AAC and 0-9 for MP3)
 -volume mode             volume mode (track for track ReplayGain application, album for album ReplayGain application)
 -threads count           number of parallel threads to use
+-convertedonly           only copy converted files (i.e. do not copy other files)
 -copycovers              copy cover art to sub-directories (useful for e.g. Logitech Media Server)
 -force                   force convert/copy even if destination file exists and is up-to-date
 -noop                    do not convert, copy, or remove any file in the destination directory

build.sbt

@@ -1,11 +1,11 @@
 name := "flac-to-mp3"
-version := "1.2"
-scalaVersion := "2.13.8"
+version := "1.3"
+scalaVersion := "2.13.12"
 
-libraryDependencies += "commons-io" % "commons-io" % "2.6"
+libraryDependencies += "commons-io" % "commons-io" % "2.11.0"
 
-mainClass in assembly := Some("org.bruchez.olivier.flactomp3.FlacToMp3")
+assembly / mainClass := Some("org.bruchez.olivier.flactomp3.FlacToMp3")
 
-assemblyJarName in assembly := "flac-to-mp3.jar"
+assembly / assemblyJarName := "flac-to-mp3.jar"
 
-scalafmtOnCompile in ThisBuild := true
+ThisBuild / scalafmtOnCompile := true

src/main/scala/org/bruchez/olivier/flactomp3/Arguments.scala

@@ -12,6 +12,7 @@ case class Arguments(
     outputBitrateOption: Option[Bitrate] = None,
     volume: Volume = NoVolumeChange,
     threadCount: Int = Math.max(1, Runtime.getRuntime.availableProcessors()),
+    convertedOnly: Boolean = false,
     copyCoversToSubDirectories: Boolean = false,
     force: Boolean = false,
     noop: Boolean = false
@@ -23,7 +24,8 @@ case class Arguments(
 }
 
 object Arguments {
-  val DefaultInputExtensionsToConvert = Set("flac", "flv", "m4a", "mp2", "mp3", "mpc", "ogg", "wav")
+  private val DefaultInputExtensionsToConvert =
+    Set("flac", "flv", "m4a", "mp2", "mp3", "mpc", "ogg", "wav")
 
   def apply(args: Array[String]): Try[Arguments] = {
     if (args.length >= 2) {
@@ -104,6 +106,8 @@ object Arguments {
                   new IllegalArgumentException(s"Unexpected thread count: ${remainingArgs.head}")
                 )
             }
+          case ConvertedOnlyArgument =>
+            Success((arguments.copy(convertedOnly = true), remainingArgs))
           case CopyCoversToSubDirectoriesArgument =>
             Success((arguments.copy(copyCoversToSubDirectories = true), remainingArgs))
           case ForceArgument =>
@@ -134,6 +138,7 @@ object Arguments {
       |-vbr quality             VBR quality (1-5 for AAC and 0-9 for MP3)
       |-volume mode             volume mode (track for track ReplayGain application, album for album ReplayGain application)
       |-threads count           number of parallel threads to use
+      |-convertedonly           only copy converted files (i.e. do not copy other files)
       |-copycovers              copy cover art to sub-directories (useful for e.g. Logitech Media Server)
       |-force                   force convert/copy even if destination file exists and is up-to-date
       |-noop                    do not convert, copy, or remove any file in the destination directory""".stripMargin
@@ -145,6 +150,7 @@ object Arguments {
   private val VariableBitrateArgument = "-vbr"
   private val VolumeArgument = "-volume"
   private val ThreadCountArgument = "-threads"
+  private val ConvertedOnlyArgument = "-convertedonly"
   private val CopyCoversToSubDirectoriesArgument = "-copycovers"
   private val ForceArgument = "-force"
   private val NoopArgument = "-noop"

src/main/scala/org/bruchez/olivier/flactomp3/FlacToMp3.scala

@@ -75,7 +75,6 @@ object FlacToMp3 {
       )
     }
   }
-  // scalastyle:on method.length
 
   private def actionGroups(srcPaths: Seq[Path], dstPaths: Seq[Path])(implicit
       arguments: Arguments
@@ -109,9 +108,16 @@ object FlacToMp3 {
       ConvertFileAction(srcPath, dstPath)
     }
 
-    val copyFileActions = filesToCopy.map { case (srcPath, dstPath) =>
-      CopyFileAction(srcPath, dstPath)
+    val copyFileActions = {
+      if (!arguments.convertedOnly) {
+        filesToCopy.map { case (srcPath, dstPath) =>
+          CopyFileAction(srcPath, dstPath)
+        }
+      } else {
+        Seq()
+      }
     }
+    // scalastyle:on method.length
 
     Seq(
       ActionGroup("Symbolic link removal", removeSymbolicLinkActions, parallelExecution = true),