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iof-tools / networkxMiCe / networkx-master / tools / appveyor / install.ps1 @ 5cef0f13

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# Sample script to install Python and pip under Windows
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# Authors: Olivier Grisel and Kyle Kastner
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# License: BSD 3 clause
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$BASE_URL = "https://www.python.org/ftp/python/"
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$GET_PIP_URL = "https://bootstrap.pypa.io/get-pip.py"
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$GET_PIP_PATH = "C:\get-pip.py"
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function DownloadPython ($python_version, $platform_suffix) {
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    $webclient = New-Object System.Net.WebClient
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    $filename = "python-" + $python_version + $platform_suffix + ".msi"
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    $url = $BASE_URL + $python_version + "/" + $filename
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    $basedir = $pwd.Path + "\"
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    $filepath = $basedir + $filename
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    if (Test-Path $filename) {
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        Write-Host "Reusing" $filepath
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        return $filepath
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    }
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    # Download and retry up to 3 times in case of network transient errors.
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    Write-Host "Downloading" $filename "from" $url
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    $retry_attempts = 2
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    for($i=0; $i -lt $retry_attempts; $i++){
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        try {
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            $webclient.DownloadFile($url, $filepath)
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            break
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        }
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        Catch [Exception] {
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            Start-Sleep 1
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        }
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   }
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   if (Test-Path $filepath) {
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       Write-Host "File saved at" $filepath
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   } else {
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       # Retry once to get the error message if any at the last try
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       $webclient.DownloadFile($url, $filepath)
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   }
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   return $filepath
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}
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function InstallPython ($python_version, $architecture, $python_home) {
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    Write-Host "Installing Python" $python_version "for" $architecture "bit architecture to" $python_home
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    if (Test-Path $python_home) {
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        Write-Host $python_home "already exists, skipping."
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        return $false
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    }
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    if ($architecture -eq "32") {
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        $platform_suffix = ""
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    } else {
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        $platform_suffix = ".amd64"
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    }
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    $msipath = DownloadPython $python_version $platform_suffix
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    Write-Host "Installing" $msipath "to" $python_home
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    $install_log = $python_home + ".log"
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    $install_args = "/qn /log $install_log /i $msipath TARGETDIR=$python_home"
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    $uninstall_args = "/qn /x $msipath"
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    RunCommand "msiexec.exe" $install_args
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    if (-not(Test-Path $python_home)) {
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        Write-Host "Python seems to be installed else-where, reinstalling."
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        RunCommand "msiexec.exe" $uninstall_args
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        RunCommand "msiexec.exe" $install_args
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    }
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    if (Test-Path $python_home) {
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        Write-Host "Python $python_version ($architecture) installation complete"
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    } else {
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        Write-Host "Failed to install Python in $python_home"
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        Get-Content -Path $install_log
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        Exit 1
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    }
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}
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function RunCommand ($command, $command_args) {
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    Write-Host $command $command_args
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    Start-Process -FilePath $command -ArgumentList $command_args -Wait -Passthru
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}
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function InstallPip ($python_home) {
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    $pip_path = $python_home + "\Scripts\pip.exe"
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    $python_path = $python_home + "\python.exe"
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    if (-not(Test-Path $pip_path)) {
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        Write-Host "Installing pip..."
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        $webclient = New-Object System.Net.WebClient
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        $webclient.DownloadFile($GET_PIP_URL, $GET_PIP_PATH)
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        Write-Host "Executing:" $python_path $GET_PIP_PATH
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        Start-Process -FilePath "$python_path" -ArgumentList "$GET_PIP_PATH" -Wait -Passthru
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    } else {
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        Write-Host "pip already installed."
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    }
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}
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function main () {
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    InstallPython $env:PYTHON_VERSION $env:PYTHON_ARCH $env:PYTHON
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    InstallPip $env:PYTHON
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}
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main