Better handling of attributes from SBT

cli/src/main/scala/coursier/cli/Coursier.scala

@@ -30,6 +30,8 @@ case class CommonOptions(
     repository: List[String],
   @HelpMessage("Do not add default repositories (~/.ivy2/local, and Central)")
     noDefault: Boolean = false,
+  @HelpMessage("Modify names in Maven repository paths for SBT plugins")
+    sbtPluginHack: Boolean = false,
   @HelpMessage("Force module version")
   @ValueDescription("organization:name:forcedVersion")
   @ExtraName("V")

cli/src/main/scala/coursier/cli/Helper.scala

@@ -114,10 +114,19 @@ class Helper(
     sys.exit(255)
   }
 
-  val repositories =
+  val repositories1 =
     (if (common.noDefault) Nil else defaultRepositories) ++
       repositories0.collect { case Right(r) => r }
 
+  val repositories =
+    if (common.sbtPluginHack)
+      repositories1.map {
+        case m: MavenRepository => m.copy(sbtAttrStub = true)
+        case other => other
+      }
+    else
+      repositories1
+
   val (rawDependencies, extraArgs) = {
     val idxOpt = Some(remainingArgs.indexOf("--")).filter(_ >= 0)
     idxOpt.fold((remainingArgs, Seq.empty[String])) { idx =>