Automatically download and install livy. livy provides a REST API to Spark.
Find the LIVY_HOME directory for a given version of Livy that
was previously installed using
livy_install(version = "0.6.0", spark_home = NULL, spark_version = NULL)
livy_home_dir(version = NULL)
Version of Livy
The path to a Spark installation. The downloaded and installed version of livy will then be associated with this Spark installation. When unset (NULL), the value is inferred based on the value of spark_version supplied.
The version of Spark to use. When unset (NULL), the value is inferred based on the value of livy_version supplied. A version of Spark known to be compatible with the requested version of livy is chosen when possible.
Path to LIVY_HOME (or
NULL if the specified version
was not found).