Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/13212#discussion_r64278795
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/resources.scala
---
@@ -46,3 +51,52 @@ case class AddFileCommand(path: String) extends
RunnableCommand {
Seq.empty[Row]
}
}
+
+/**
+ * Return a list of file paths that are added to resources.
+ * If file paths are provided, return the ones that are added to resources.
+ */
+case class ListFilesCommand(files: Seq[String] = Seq.empty[String])
extends RunnableCommand {
+ override val output: Seq[Attribute] = {
+ AttributeReference("Results", StringType, nullable = false)() :: Nil
+ }
+ override def run(sparkSession: SparkSession): Seq[Row] = {
+ val fileList = sparkSession.sparkContext.listFiles()
+ if (files.size > 0) {
+ files.map { f =>
+ val uri = new URI(f)
+ val schemeCorrectedPath = uri.getScheme match {
+ case null | "local" => new
File(f).getCanonicalFile.toURI.toString
+ case _ => f
+ }
+ new Path(schemeCorrectedPath).toUri.toString
+ }.collect {
+ case f if fileList.contains(f) => f
+ }.map(Row(_))
+ } else {
+ fileList.map(Row(_))
+ }
+ }
+}
+
+/**
+ * Return a list of jar files that are added to resources.
+ * If jar files are provided, return the ones that are added to resources.
+ */
+case class ListJarsCommand(jars: Seq[String] = Seq.empty[String]) extends
RunnableCommand {
+ override val output: Seq[Attribute] = {
+ AttributeReference("Results", StringType, nullable = false)() :: Nil
+ }
+ override def run(sparkSession: SparkSession): Seq[Row] = {
+ val jarList = sparkSession.sparkContext.listJars()
+ if (jars.size > 0) {
+ jars.map { f =>
+ new Path(f).getName
+ }.flatMap {f =>
+ jarList.filter(_.contains(f))
+ }.map(Row(_))
+ } else {
+ jarList.map(Row(_))
+ }
+ }
--- End diff --
I wonder whether the following form is more readable...
```scala
if (jars.nonEmpty) {
for {
jarName <- jars.map(f => new Path(f).getName)
jarPath <- jarList if jarPath.contains(jarName)
} yield Row(jarPath)
} else {
jarList.map(Row(_))
}
```
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
