Github user ryan-williams commented on a diff in the pull request: https://github.com/apache/spark/pull/2848#discussion_r21386501 --- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala --- @@ -412,6 +403,48 @@ private[spark] object Utils extends Logging { } /** + * Download a file from @in to @tempFile, then move it to @destFile, checking whether @destFile + * already exists, is equal to the downloaded file, and can be overwritten. + */ + private def maybeMoveFile( + url: String, + sourceFile: File, + destFile: File, + fileOverwrite: Boolean): Unit = { + + var shouldCopy = true + if (destFile.exists) { + if (!Files.equal(sourceFile, destFile)) { + if (fileOverwrite) { + destFile.delete() + logInfo(("File %s exists and does not match contents of %s, " + --- End diff -- sure, done
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