Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/3670#discussion_r23971392
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -513,13 +516,44 @@ private[spark] object Utils extends Logging {
Files.move(sourceFile, destFile)
} else {
logInfo(s"Copying ${sourceFile.getAbsolutePath} to
${destFile.getAbsolutePath}")
- Files.copy(sourceFile, destFile)
+ copyRecursive(sourceFile, destFile)
+ }
+ }
+
+ private def filesEqualRecursive(file1: File, file2: File): Boolean = {
+ if (file1.isDirectory && file2.isDirectory) {
+ val subfiles1 = file1.listFiles()
+ val subfiles2 = file2.listFiles()
+ if (subfiles1.size != subfiles2.size) {
+ return false
+ }
+
subfiles1.sortBy(_.getName).zip(subfiles2.sortBy(_.getName)).dropWhile {
--- End diff --
Instead of `dropWhile { ... }.isEmpty`, I think you can do `forAll`:
```scala
scala> Seq(1, 2, 3).forall { _ >= 3 }
res1: Boolean = false
scala> Seq(1, 2, 3).forall { _ >= 0 }
res2: Boolean = true
```
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