dev/appveyor-install-dependencies.ps1

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regarding copyright ownership.  The ASF licenses this file
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  http://www.apache.org/licenses/LICENSE-2.0
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#>

$CRAN = "https://cloud.r-project.org"

Function InstallR {
  if ( -not(Test-Path Env:\R_ARCH) ) {
    $arch = "i386"
  }
  Else {
    $arch = $env:R_ARCH
  }

  $urlPath = ""
  $latestVer = $(ConvertFrom-JSON $(Invoke-WebRequest https://rversions.r-pkg.org/r-release-win).Content).version
  If ($rVer -ne $latestVer) {
    $urlPath = ("old/" + $rVer + "/")
  }

  $rurl = $CRAN + "/bin/windows/base/" + $urlPath + "R-" + $rVer + "-win.exe"

  # Downloading R
  Start-FileDownload $rurl "R-win.exe"

  # Running R installer
  Start-Process -FilePath .\R-win.exe -ArgumentList "/VERYSILENT /DIR=C:\R" -NoNewWindow -Wait

  $RDrive = "C:"
  echo "R is now available on drive $RDrive"

  $env:PATH = $RDrive + '\R\bin\' + $arch + ';' + 'C:\MinGW\msys\1.0\bin;' + $env:PATH

  # Testing R installation
  Rscript -e "sessionInfo()"
}

Function InstallRtools {
  $rtoolsver = $rToolsVer.Split('.')[0..1] -Join ''
  $rtoolsurl = $CRAN + "/bin/windows/Rtools/Rtools$rtoolsver.exe"

  # Downloading Rtools
  Start-FileDownload $rtoolsurl "Rtools-current.exe"

  # Running Rtools installer
  Start-Process -FilePath .\Rtools-current.exe -ArgumentList /VERYSILENT -NoNewWindow -Wait

  $RtoolsDrive = "C:"
  echo "Rtools is now available on drive $RtoolsDrive"

  if ( -not(Test-Path Env:\GCC_PATH) ) {
    $gccPath = "gcc-4.6.3"
  }
  Else {
    $gccPath = $env:GCC_PATH
  }
  $env:PATH = $RtoolsDrive + '\Rtools\bin;' + $RtoolsDrive + '\Rtools\MinGW\bin;' + $RtoolsDrive + '\Rtools\' + $gccPath + '\bin;' + $env:PATH
  $env:BINPREF=$RtoolsDrive + '/Rtools/mingw_$(WIN)/bin/'
}

# create tools directory outside of Spark directory
$up = (Get-Item -Path ".." -Verbose).FullName
$tools = "$up\tools"
if (!(Test-Path $tools)) {
    New-Item -ItemType Directory -Force -Path $tools | Out-Null
}

# ========================== Maven
Push-Location $tools

$mavenVer = "3.5.4"
Start-FileDownload "https://archive.apache.org/dist/maven/maven-3/$mavenVer/binaries/apache-maven-$mavenVer-bin.zip" "maven.zip"

# extract
Invoke-Expression "7z.exe x maven.zip"

# add maven to environment variables
$env:Path += ";$tools\apache-maven-$mavenVer\bin"
$env:M2_HOME = "$tools\apache-maven-$mavenVer"
$env:MAVEN_OPTS = "-Xmx2g -XX:ReservedCodeCacheSize=1g"

Pop-Location

# ========================== Hadoop bin package
$hadoopVer = "2.6.4"
$hadoopPath = "$tools\hadoop"
if (!(Test-Path $hadoopPath)) {
    New-Item -ItemType Directory -Force -Path $hadoopPath | Out-Null
}
Push-Location $hadoopPath

Start-FileDownload "https://github.com/steveloughran/winutils/archive/master.zip" "winutils-master.zip"

# extract
Invoke-Expression "7z.exe x winutils-master.zip"

# add hadoop bin to environment variables
$env:HADOOP_HOME = "$hadoopPath/winutils-master/hadoop-$hadoopVer"
$env:Path += ";$env:HADOOP_HOME\bin"

Pop-Location

# ========================== R
$rVer = "3.4.1"
$rToolsVer = "3.4.0"

InstallR
InstallRtools

$env:R_LIBS_USER = 'c:\RLibrary'
if ( -not(Test-Path $env:R_LIBS_USER) ) {
  mkdir $env:R_LIBS_USER
}