xkrogen commented on a change in pull request #34120:
URL: https://github.com/apache/spark/pull/34120#discussion_r718770998
##########
File path:
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
##########
@@ -1470,6 +1471,84 @@ private object Client extends Logging {
(mainUri ++ secondaryUris).toArray
}
+ /**
+ * Returns a list of local, absolute file URLs representing the user
classpath. Note that this
+ * must be executed on the same host which will access the URLs, as it will
resolve relative
+ * paths based on the current working directory, as well as environment
variables.
+ *
+ * @param conf Spark configuration.
+ * @param useClusterPath Whether to use the 'cluster' path when resolving
paths with the
+ * `local` scheme. This should be used when running on
the cluster, but
+ * not when running on the gateway (i.e. for the
driver in `client` mode).
+ * @return Array of local URLs ready to be passed to a
[[java.net.URLClassLoader]].
+ */
+ def getUserClasspathUrls(conf: SparkConf, useClusterPath: Boolean):
Array[URL] = {
+ Client.getUserClasspath(conf).map { uri =>
+ val inputPath = uri.getPath
+ val replacedFilePath = if (Utils.isLocalUri(uri.toString) &&
useClusterPath) {
+ Client.getClusterPath(conf, inputPath)
+ } else {
+ // Any other URI schemes should have been resolved by this point
+ assert(uri.getScheme == null || uri.getScheme == "file" ||
Utils.isLocalUri(uri.toString),
+ "getUserClasspath should only return 'file' or 'local' URIs but
found: " + uri)
+ inputPath
+ }
+ val envVarResolvedFilePath = replaceEnvVars(replacedFilePath, sys.env)
+ Paths.get(envVarResolvedFilePath).toAbsolutePath.toUri.toURL
+ }
+ }
+
+ /**
+ * Replace environment variables in a string according to the same rules
[[Environment]]:
+ * `$VAR_NAME` for Unix, `%VAR_NAME%` for Windows, and `{{VAR_NAME}}` for
all OS.
+ * This support escapes for `$` and `%` characters, e.g.
+ * `\$FOO` and `%%FOO%%` will be resolved to `$FOO` and `%FOO%`,
respectively, instead of being
+ * treated as variable names.
+ *
+ * @param unresolvedString The unresolved string which may contain variable
references.
+ * @param env The System environment
+ * @param isWindows True iff running in a Windows environment
+ * @return The input string with variables replaced with their values from
`env`
+ */
+ def replaceEnvVars(
+ unresolvedString: String,
+ env: IMap[String, String],
+ isWindows: Boolean = Shell.WINDOWS): String = {
+ val osResolvedString = if (isWindows) {
+ // Environment variable names can contain anything besides = and %
+ // Ref:
https://docs.microsoft.com/en-us/windows/win32/procthread/environment-variables
+ val windowsPattern = "(?:%%|%([^=%]+)%)".r
+ windowsPattern.replaceAllIn(unresolvedString, m =>
+ Regex.quoteReplacement(m.matched match {
+ case "%%" => "%"
+ case _ => env.getOrElse(m.group(1), "")
+ })
+ )
+ } else {
+ // Environment variables are alphanumeric plus underscore,
case-sensitive, can't start with
+ // a digit, based on Shell and Utilities volume of IEEE Std 1003.1-2001
+ // Ref:
https://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html
+ val unixPattern =
"""(?i)(?:\\\\|\\\$|\$([A-Z_][A-Z0-9_]*))|\$\{([A-Z_][A-Z0-9_]*)}""".r
+ unixPattern.replaceAllIn(unresolvedString, m =>
+ Regex.quoteReplacement(m.matched match {
+ case """\\""" => """\"""
+ case """\$""" => """$"""
+ case _ => m.subgroups.filterNot(_ == null).headOption match {
+ case Some(v) => env.getOrElse(v, "")
+ case None =>
+ // Note that this should never be reached and indicates a bug
+ throw new IllegalStateException(s"No valid capture group was
found for match: $m")
+ }
+ })
+ )
+ }
+
+ // {{...}} is a YARN thing and not OS-specific. Follow Unix shell naming
conventions
+ val yarnPattern = "(?i)\\{\\{([A-Z_][A-Z0-9_]*)}}".r
+ yarnPattern.replaceAllIn(osResolvedString,
+ m => Regex.quoteReplacement(env.getOrElse(m.group(1), "")))
Review comment:
Updated, thanks for the suggestion
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