Revert "Check duplicated classes in dependencies tool"

README.md

@@ -20,7 +20,6 @@ A sbt plugin for creating distributable Scala packages that include dependent ja
   - The latest version is linked from `~/local/{project name}/current`
 - You can add other resources in `src/pack` folder. 
   - All resources in this folder will be copied to `target/pack`.
-- Check duplicated classes in dependencies.  
 
 * [Release Notes](ReleaseNotes.md)
 
@@ -169,10 +168,6 @@ export PATH=$(HOME)/local/bin:$PATH
 
     $ sbt pack-archive
 
-### Find duplicated classes in dependencies
-
-This feature is documented in a [separate page](USAGE.md)
-
 ### Example projects
 
 See also [examples](src/sbt-test/sbt-pack) folder

src/main/scala/xerial/sbt/Pack.scala

@@ -7,10 +7,6 @@
 
 package xerial.sbt
 
-import java.io.InputStream
-import java.security.{DigestInputStream, MessageDigest}
-import java.util.zip.ZipFile
-
 import sbt._
 import org.fusesource.scalate.TemplateEngine
 import Keys._
@@ -70,9 +66,6 @@ object Pack extends sbt.Plugin with PackArchive {
   val packJarNameConvention = SettingKey[String]("pack-jarname-convention", "default: (artifact name)-(version).jar; original: original JAR name; full: (organization).(artifact name)-(version).jar; no-version: (organization).(artifact name).jar")
   val packDuplicateJarStrategy = SettingKey[String]("deal with duplicate jars. default to use latest version", "latest: use the jar with a higher version; exit: exit the task with error")
 
-  val checkDuplicatedExclude = settingKey[Seq[(ModuleID, ModuleID)]]("List of pair of modules whose duplicated dependencies are ignored, because they are known to be harmless.")
-  val checkDuplicatedDependencies = taskKey[Unit]("Checks there are no duplicated dependencies, incompatible between them.")
-
   import complete.DefaultParsers._
   private val targetFolderParser: complete.Parser[Option[String]] =
     (Space ~> token(StringBasic, "(target folder)")).?.!!!("invalid input. please input target folder name")
@@ -302,109 +295,6 @@ object Pack extends sbt.Plugin with PackArchive {
 
       out.log.info("done.")
       distDir
-    },
-
-    checkDuplicatedExclude := Seq.empty,
-
-    checkDuplicatedDependencies := {
-      val log = streams.value.log
-
-      val dependentJars =
-        for {
-          (r: sbt.UpdateReport, projectRef) <- packUpdateReports.value
-          c <- r.configurations if c.configuration == "runtime"
-          m <- c.modules
-          (artifact, file) <- m.artifacts if !packExcludeArtifactTypes.value.contains(artifact.`type`)
-        } yield {
-          val mid = m.module
-          val me = ModuleEntry(mid.organization, mid.name, VersionString(mid.revision), artifact.name, artifact.classifier, file.getName, projectRef)
-          me -> file
-        }
-
-      def hash(is: InputStream) = {
-        val md = MessageDigest.getInstance("MD5")
-        val dis = new DigestInputStream(is, md)
-        Iterator.continually(dis.read()).takeWhile(_ >= 0).foreach{_ ⇒ ()}
-        md.digest()
-      }
-
-      def modID(m: ModuleEntry) = m.org % m.artifactName % m.revision.toString
-
-      val distinctDpJars = dependentJars
-          .groupBy(_._1.noVersionModuleName)
-          .map {
-            case (key, entries) if entries.groupBy(_._1.revision).size == 1 ⇒
-              val e0 = entries(0)
-              (modID(e0._1), e0._2)
-            case (key, entries) ⇒
-              val revisions = entries.groupBy(_._1.revision).map(_._1).toList.sorted
-              val latestRevision = revisions.last
-              packDuplicateJarStrategy.value match {
-                case "latest" =>
-                  log.warn(s"Version conflict on $key. Using ${latestRevision} (found ${revisions.mkString(", ")})")
-                  val entry = entries.filter(_._1.revision == latestRevision)(0)
-                  (modID(entry._1), entry._2)
-                case "exit" =>
-                  sys.error(s"Version conflict on $key (found ${revisions.mkString(", ")})")
-                case x =>
-                  sys.error("Unknown duplicate JAR strategy '%s'".format(x))
-              }
-          }.par
-
-      val allClasses = distinctDpJars.map { case (mod, file) ⇒
-        import scala.collection.JavaConversions._
-        log debug s"Scanning $file"
-        val jar = new ZipFile(file)
-        val classes = try {
-          jar.entries
-              .filter { e ⇒ !e.isDirectory && e.getName.endsWith(".class") }
-              .toList
-              .map { e ⇒
-                val h = hash(jar.getInputStream(e))
-                //log debug s"${e.getName} ⇒ ${h.map(a ⇒ f"$a%02X").mkString}"
-                (e.getName, h)
-              }
-        } finally
-          jar.close()
-        (mod, classes)
-      }
-
-      val conflicts = for {
-        ((mod1, hashes1), index) ← allClasses.zipWithIndex
-        others = allClasses.seq.view(index+1, allClasses.size).par
-        (file1, hash1) ← hashes1
-        (mod2, hashes2) ← others
-        if !checkDuplicatedExclude.value.exists{ case (m1, m2) ⇒
-          m1 == mod1 && m2 == mod2 || m2 == mod1 && m1 == mod2
-        }
-        (file2, hash2) ← hashes2
-        if file1 == file2 && !(hash1 sameElements hash2)
-      } yield {
-          //log debug mod+" "+mod2+" "+file1
-          (mod1, mod2, file1)
-      }
-
-      if (conflicts.size > 0) {
-        val groupedConflicts = conflicts.groupBy { case (mod1, mod2, file) ⇒
-          (mod1, mod2)
-        }.mapValues { _.map{ case (mod1, mod2, file) ⇒ file } }
-        groupedConflicts.foreach { case ((m1, m2), files) ⇒
-          val f = files.map{ "\n  "+_.replaceFirst(".class$", "")}.mkString
-          println(s"Conflict between $m1 and $m2:"+f)
-        }
-
-        def toStr(m: ModuleID) = s""""${m.organization}" % "${m.name}" % "${m.revision}""""
-        val excludes = groupedConflicts.map{ case ((m1, m2), _) ⇒ s"  ${toStr(m1)} -> ${toStr(m2)}" }.mkString(",\n")
-
-        println(s"""
-			  |If you consider these conflicts are inoffensive, in order to ignore them, use:
-			  |set checkDuplicatedExclude := Seq(
-			  |$excludes
-			  |)
-			""".stripMargin)
-        sys.error(s"Detected ${conflicts.size} conflict(s)")
-      } else
-        log info s"No conflicts detected, scanned ${dependentJars.size} jar files."
     }
   ) ++ packArchiveSettings