Update and rename appveyor to appveyor/install-miniconda.ps1

appveyor/install-miniconda.ps1

@@ -0,0 +1,71 @@
+# Sample script to install anaconda under windows
+# Authors: Stuart Mumford
+# Borrwed from: Olivier Grisel and Kyle Kastner
+# License: BSD 3 clause
+
+$MINICONDA_URL = "http://repo.continuum.io/miniconda/"
+
+function DownloadMiniconda ($version, $platform_suffix) {
+    $webclient = New-Object System.Net.WebClient
+    $filename = "Miniconda-" + $version + "-Windows-" + $platform_suffix + ".exe"
+
+    $url = $MINICONDA_URL + $filename
+
+    $basedir = $pwd.Path + "\"
+    $filepath = $basedir + $filename
+    if (Test-Path $filename) {
+        Write-Host "Reusing" $filepath
+        return $filepath
+    }
+
+    # Download and retry up to 3 times in case of network transient errors.
+    Write-Host "Downloading" $filename "from" $url
+    $retry_attempts = 2
+    for($i=0; $i -lt $retry_attempts; $i++){
+        try {
+            $webclient.DownloadFile($url, $filepath)
+            break
+        }
+        Catch [Exception]{
+            Start-Sleep 1
+        }
+   }
+   if (Test-Path $filepath) {
+       Write-Host "File saved at" $filepath
+   } else {
+       # Retry once to get the error message if any at the last try
+       $webclient.DownloadFile($url, $filepath)
+   }
+   return $filepath
+}
+
+function InstallMiniconda ($python_version, $architecture, $python_home) {
+    Write-Host "Installing miniconda" $python_version "for" $architecture "bit architecture to" $python_home
+    if (Test-Path $python_home) {
+        Write-Host $python_home "already exists, skipping."
+        return $false
+    }
+    if ($architecture -eq "x86") {
+        $platform_suffix = "x86"
+    } else {
+        $platform_suffix = "x86_64"
+    }
+    $filepath = DownloadMiniconda $python_version $platform_suffix
+    Write-Host "Installing" $filepath "to" $python_home
+    $args = "/InstallationType=AllUsers /S /AddToPath=1 /RegisterPython=1 /D=" + $python_home
+    Write-Host $filepath $args
+    Start-Process -FilePath $filepath -ArgumentList $args -Wait -Passthru
+    #Start-Sleep -s 15
+    if (Test-Path C:\conda) {
+        Write-Host "Miniconda $python_version ($architecture) installation complete"
+    } else {
+        Write-Host "Failed to install Python in $python_home"
+        Exit 1
+    }
+}
+
+function main () {
+    InstallMiniconda $env:MINICONDA_VERSION $env:PLATFORM $env:PYTHON
+}
+
+main