private List<String> buildPySparkShellCommand(Map<String, String> env) throws IOException {
// For backwards compatibility, if a script is specified in
// the pyspark command line, then run it using spark-submit.
if (!appArgs.isEmpty() && appArgs.get(0).endsWith(".py")) {
System.err.println(
"Running python applications through 'pyspark' is not supported as of Spark 2.0.\n"
+ "Use ./bin/spark-submit <python file>");
System.exit(-1);
}
checkArgument(appArgs.isEmpty(), "pyspark does not support any application options.");
// When launching the pyspark shell, the spark-submit arguments should be stored in the
// PYSPARK_SUBMIT_ARGS env variable.
constructEnvVarArgs(env, "PYSPARK_SUBMIT_ARGS");
// The executable is the PYSPARK_DRIVER_PYTHON env variable set by the pyspark script,
// followed by PYSPARK_DRIVER_PYTHON_OPTS.
List<String> pyargs = new ArrayList<>();
pyargs.add(firstNonEmpty(System.getenv("PYSPARK_DRIVER_PYTHON"), "python"));
String pyOpts = System.getenv("PYSPARK_DRIVER_PYTHON_OPTS");
if (!isEmpty(pyOpts)) {
pyargs.addAll(parseOptionString(pyOpts));
}
return pyargs;
}
private List<String> buildSparkRCommand(Map<String, String> env) throws IOException {
if (!appArgs.isEmpty() && appArgs.get(0).endsWith(".R")) {
System.err.println(
"Running R applications through 'sparkR' is not supported as of Spark 2.0.\n"
+ "Use ./bin/spark-submit <R file>");
System.exit(-1);
}
// When launching the SparkR shell, store the spark-submit arguments in the SPARKR_SUBMIT_ARGS
// env variable.
constructEnvVarArgs(env, "SPARKR_SUBMIT_ARGS");
// Set shell.R as R_PROFILE_USER to load the SparkR package when the shell comes up.
String sparkHome = System.getenv("SPARK_HOME");
env.put(
"R_PROFILE_USER",
join(File.separator, sparkHome, "R", "lib", "SparkR", "profile", "shell.R"));
List<String> args = new ArrayList<>();
args.add(firstNonEmpty(System.getenv("SPARKR_DRIVER_R"), "R"));
return args;
}