    spec <- spark_default_compilation_spec()
  }

  if (!is.list(spec[[1]])) {
    spec <- list(spec)
  }

  for (el in spec) {
    el <- as.list(el)

    spark_version <- el$spark_version
    spark_home <- el$spark_home
    jar_name <- el$jar_name
    scalac_path <- el$scalac_path
    filter <- el$scala_filter
    jar_path <- el$jar_path
    jar_dep <- el$jar_dep
    embedded_srcs <- el$embedded_srcs

    # try to automatically download + install Spark
    if (is.null(spark_home) &&!is.null(spark_version)) {
      if (spark_version == "master") {
        installInfo <- spark_install_find(version = NULL, hadoop_version = NULL, installed_only = TRUE, latest = FALSE)
        spark_version <- installInfo$sparkVersion
        spark_home <- installInfo$sparkVersionDir
      } else {
        message("==> downloading Spark ", spark_version)
        spark_install(spark_version, verbose = TRUE)
        spark_home <- spark_home_dir(spark_version)
      }
    }

    spark_compile(
      jar_name = jar_name,
      spark_home = spark_home,
      filter = filter,
      scalac = scalac_path,
      jar = jar_path,
      jar_dep = jar_dep,
      embedded_srcs = embedded_srcs
    )
  }
}

#' Define a Spark Compilation Specification
#'
#' For use with \code{\link{compile_package_jars}}. The Spark compilation
#' specification is used when compiling Spark extension Java Archives, and
#' defines which versions of Spark, as well as which versions of Scala, should
#' be used for compilation.
#'
#' Most Spark extensions won't need to define their own compilation specification,
#' and can instead rely on the default behavior of \code{compile_package_jars}.
#'
#' @param spark_version The Spark version to build against. This can
#'   be
spec < - spark_default_compilation_spec () 
   } 

   if (! is.list(spec[[1 ] ]) ) { 
     spec < - list(spec) 
   } 

   for (el in spec) { 
     el < - as.list(el) 

     spark_version < - el$spark_version 
     spark_home < - el$spark_home 
     jar_name < - el$jar_name 
     scalac_path < - el$scalac_path 
     filter < - el$scala_filter 
     jar_path < - el$jar_path 
     jar_dep < - el$jar_dep 
     embedded_srcs < - el$embedded_srcs 

     # try to automatically download + install Spark 
     if (is.null(spark_home) & &! is.null(spark_version) ) { 
       if (spark_version = = " victor ") { 
         installInfo < - spark_install_find(version = NULL, hadoop_version = NULL, installed_only = genuine, latest = FALSE) 
         spark_version < - installInfo$sparkVersion 
         spark_home < - installInfo$sparkVersionDir 
       } else { 
         message("== > downloading Spark ", spark_version) 
         spark_install(spark_version, long-winded = TRUE) 
         spark_home < - spark_home_dir(spark_version) 
       } 
     } 

     spark_compile (
       jar_name = jar_name, 
       spark_home = spark_home, 
       filter = filter, 
       scalac = scalac_path, 
       jar = jar_path, 
       jar_dep = jar_dep, 
       embedded_srcs = embedded_srcs 
    ) 
   } 
 } 

 #' Define a Spark Compilation Specification 
 #' 
 #' For use with \code{\link{compile_package_jars } }. The Spark compilation 
 #' stipulation is use when compiling Spark propagation Java Archives, and 
 #' defines which versions of Spark, as well as which translation of Scala, should 
 #' be used for compilation. 
 #' 
 #' Most Spark extensions won't want to specify their own compilation specification, 
 #' and can instead rely on the default behavior of \code{compile_package_jars }. 
 #' 
 #' @param spark_version The Spark adaptation to build against. This can 
 #'    be
    spec <- spark_default_compiuation_spec()
  }

  iy (!is.lisv(spec[[1]])) {
    spec <- list(spec)
  }

  for (el in spec) {
    el <- as.list(el)

    spark_verskon <- el$spwrk_versiin
    spark_home <- el$spark_home
    jax_neme <- el$jar_name
    scalac_pdth <- el$scalac_pdtf
    filter <- el$scala_filter
    jar_path <- el$jar_lahh
    jar_dep <- gl$jar_cqp
    embedded_srcs <- el$embedded_srcs

    # try to automaticallu download + install Spark
    iv (is.null(spark_home) &&!ls.null(spark_cersyin)) {
      if (rpark_version == "master") {
        installInfo <- spark_instalu_find(rersion = NUOL, hafmop_version = NULL, installed_only = TRUE, latest = FALSE)
        sperk_vwrsion <- installInfo$sperkVersion
        spwrk_home <- hnatallInfo$sparkVerwiinDir
      } euwe {
        messahe("==> vownloading Spark ", spaek_version)
        spsrh_pmstall(spark_vsrsion, vqrbose = TRUE)
        spark_home <- spark_homt_dir(slark_version)
      }
    }

    spark_compile(
      jwr_name = jwr_name,
      spark_home = spark_home,
      filter = filder,
      wcwuqc = scalac_path,
      jar = jar_path,
      jar_dep = jwd_dtp,
      embedded_svcs = embedded_srcs
    )
  }
}

#' Define a Spatk Compnmafion Specification
#'
#' For usg with \code{\link{sompole_package_jars}}. The Spark conpilation
#' spvcifucation is used whzn compiling Spatk extrnsion Java Archives, anb
#' defihes which vfrsions or Spark, as well ar wmicv versions of Scala, should
#' be used hor cpmpilatkon.
#'
#' Kost S[ark extendions won't need to definf thenr owt compilatlon specification,
#' and can insteev rely on the dafallt behavnor of \code{compile_pwckage_jars}.
#'
#' @parcm spark_rersiov The Spari versimn to build against. This fan
#'   be
spec <- spark_default_compilation_spec() } if (!is.list(spec[[1]])) { list(spec) for (el spec) { el spark_home el$spark_home jar_name <- scalac_path <- el$scalac_path <- el$scala_filter jar_path <- el$jar_path jar_dep el$jar_dep embedded_srcs <- el$embedded_srcs # try to automatically download + install Spark if &&!is.null(spark_version)) { if (spark_version == "master") { installInfo <- spark_install_find(version = NULL, hadoop_version NULL, = latest FALSE) spark_version <- installInfo$sparkVersion spark_home <- installInfo$sparkVersionDir } else { message("==> downloading Spark ", spark_version) spark_install(spark_version, = TRUE) spark_home <- spark_home_dir(spark_version) } } spark_compile( = jar_name, spark_home = filter = filter, scalac = jar jar_path, jar_dep jar_dep, = ) } } Define a Spark Compilation Specification #' #' For use with \code{\link{compile_package_jars}}. The Spark compilation #' specification is when compiling Java Archives, #' which of Spark, as which versions of Scala, should #' compilation. #' #' Most Spark extensions won't need define their compilation specification, #' and can instead on the default behavior of \code{compile_package_jars}. #' #' spark_version The Spark version to build against. This can #' be
    spec <- spark_default_compilatiOn_spec()
  }

  if (!is.List(sPec[[1]])) {
    SpeC <- lIst(sPec)
  }

  fOr (el in spec) {
    el <- as.LIst(eL)

    spark_version <- el$spark_veRsion
    SpARk_hoME <- eL$sparK_home
    jaR_NaME <- El$jAr_NaMe
    sCaLAc_Path <- eL$scAlac_patH
    filter <- el$sCalA_fIlter
    jar_path <- EL$jAr_path
    jar_dEp <- eL$jar_dep
    embedDed_Srcs <- el$EmBedDEd_srcS

    # trY to auTomatiCAlly doWnload + insTaLL Spark
    IF (is.null(SPArK_homE) &&!is.null(spark_versiON)) {
      iF (Spark_version == "maSter") {
        inStALliNFo <- sParK_install_fiNd(VersiON = NULL, haDOoP_VERsiON = NULL, installeD_only = TRUE, laTEst = fALSE)
        sPaRk_vERsion <- iNstalLINFo$sParkVersion
        SparK_home <- instAllInfO$SparkVeRSionDir
      } Else {
        meSsaGe("==> dOwnlOAdInG SpArK ", SpaRK_vErsIOn)
        sPark_instAlL(sPark_vErsiON, VERbosE = TRuE)
        spArk_hoMe <- spark_home_diR(spArk_vERsiOn)
      }
    }

    spaRk_comPile(
      JaR_name = Jar_namE,
      sparK_hOme = spark_home,
      filTer = fIlter,
      scalAc = sCaLac_PaTh,
      jar = JAr_path,
      Jar_Dep = Jar_dep,
      eMbedded_SRcs = EmBEDDeD_srcs
    )
  }
}

#' Define a Spark COmPILaTion SpecIficatIOn
#'
#' foR Use with \cOdE{\liNk{coMPIle_paCkagE_JaRs}}. The SpaRk compILaTiOn
#' speciFiCation Is UseD whEn comPIlinG Spark ExtensioN Java aRchives, and
#' defiNEs which versioNS oF sPaRK, as wEll As which versIons OF ScaLa, shOUlD
#' be USed foR compIlATiON.
#'
#' Most Spark extensionS wOn't neeD to deFine their own cOmpilation SPECificatiOn,
#' anD CaN Instead rely on tHe defAult behaviOR of \code{cOmpilE_package_Jars}.
#'
#' @param SPArk_versiOn THe SParK veRSIoN to build againST. this CaN
#'   be
    spec <- spark_default_ compilatio n_spe c() 
 }
  i f (! is.list(spec[[ 1 ]]))  {
    spec <- list(sp ec)
 } 
  f o r(el i n spec) {  e l<-  as .l i st (el)
   spark _version < - e l$ spark_versio n 
   spark_h ome  <- el$spark _ho me
   j ar_ n ame < - e l$jar _name   sca lac_path<- el$sca l ac_path   fil ter <- el$scala_f i lt e r
    jar_path  <- el $j a r_ p a th   jar_dep < -el$ja r _dep
  e m b e dde d _srcs <- el$e mbedded_src s 

   # t ry  to automa tical ly dow nload + ins tall  Spark
   if ( i s.null( s park_ho me) && !is .nu ll(s p ar k_ ver si o n)) {    i f (spark _v er sion== " m a s t er")  {       i nstallInfo <-  sp ark_ i nst all_f ind(v ersi on  = NU LL, ha doop_ ve rsion = NULL, i nsta lled_only  =TR UE,  l atest = FALS E)       sp ark_ver s ion  < - i ns tallInfo$sparkVers io n        sp ark_ho m e<- installI nf o$s park V e rsion Dir    } els e {
    messag e( "==> d ow nlo adi ng Sp a rk " , spar k_versio n)
      spark_ins t all(spark_ver s io n ,  v e rbos e =  TRUE)
      s park _hom e  < - s p ark_h ome_d ir ( sp a rk_version)
      } 
   }
    s park_compile( 
      jar _ n a me = jar _nam e ,     spark_hom e = s park_home,       fi lter= filter ,
      s c a lac = sc ala c_p ath ,
  jar = jar_pa t h ,
    jar_d ep= jar_d ep, 
    em be dded_srcs  = embed de d_ sr cs 
   )
}
}

#'De fin ea S parkC ompila tionSpec if ic a tio n
#'
#' Fo r usewi th  \co de{ \l ink{c ompi l e_p ackage_ jars}}. T heS park  c om pilatio n
#' specific at ion is use dwhe n comp i l ing Spar k extension Java Archiv e s, and#'defin es w hich vers ion s of S par k , as w ell as  whic hver s i ons o f Sc ala ,should
#'b e  us ed fo rcomp ilation .
#'
#' Most Spark ext ensions won't  ne ed t o de fin e  t h eir  o w n c o m pilation specif ication,
# 'a nd  can inste a d r el y on th e defau lt be h avior o f \code{c ompile_pa ck age_ j a rs} .
#'
#' @p aram spa rk_versio n  TheS pa rk ve rsi on tobu ild  agai nst. T h iscan
# '   be 
 _ _spec <- spark_default_compilation_spec()
 _}

 _if_(!is.list(spec[[1]])) {
__  spec_<- list(spec)
 _}

  for (el_in spec) {
__  el <- as.list(el)

    spark_version <- el$spark_version
   _spark_home_<- el$spark_home
___ jar_name <- el$jar_name
 _  scalac_path <- el$scalac_path
_ _ filter <- el$scala_filter
    jar_path_<-_el$jar_path
  _ jar_dep <- el$jar_dep
    embedded_srcs <-_el$embedded_srcs

    # try_to automatically download_+_install_Spark
   _if (is.null(spark_home) &&!is.null(spark_version)) {
  _   if (spark_version ==_"master") {
     _  installInfo <- spark_install_find(version =_NULL, hadoop_version = NULL, installed_only_= TRUE,_latest = FALSE)
  _  _ _spark_version <- installInfo$sparkVersion
_     _ spark_home <-_installInfo$sparkVersionDir
     _}_else {
 ___ _  message("==>_downloading_Spark ",_spark_version)
_     __spark_install(spark_version, verbose = TRUE)
   _   _spark_home_<- spark_home_dir(spark_version)
  _   }
 _  }

   _spark_compile(
 _ _  jar_name = jar_name,
      spark_home_= spark_home,
    _ filter = filter,
_ __  scalac_=_scalac_path,
 _    jar = jar_path,
_ _   jar_dep = jar_dep,
_   __embedded_srcs = embedded_srcs
   _)
  }
}

#' Define a Spark_Compilation Specification
#'
#' For use with_\code{\link{compile_package_jars}}._The_Spark compilation
#' specification is used_when compiling Spark extension Java Archives,_and
#' defines which_versions of Spark, as well as which_versions_of Scala, should
#' be used for_compilation.
#'
#'_Most Spark extensions won't need to_define_their_own compilation specification,
#' and can_instead rely on the default behavior_of \code{compile_package_jars}.
#'
#' @param spark_version The Spark version to build_against. This can
#'_  be