AppVeyor: Update config file and install script

appveyor.yml

 # https://ci.appveyor.com/project/cython/cython
 
-version: {branch}-{build}
-
 environment:
 
   global:
@@ -81,5 +79,8 @@ test_script:
 artifacts:
   - path: dist\*
 
+cache:
+  - C:\Downloads\Cython -> appveyor\install.ps1
+
 #on_success:
 #  - TODO: upload the content of dist/*.whl to a public wheelhouse

appveyor/install.ps1

@@ -2,64 +2,76 @@
 # Authors: Olivier Grisel and Kyle Kastner
 # License: CC0 1.0 Universal: http://creativecommons.org/publicdomain/zero/1.0/
 
-$BASE_URL = "https://www.python.org/ftp/python/"
+$PYTHON_BASE_URL = "https://www.python.org/ftp/python/"
 $GET_PIP_URL = "https://bootstrap.pypa.io/get-pip.py"
 $GET_PIP_PATH = "C:\get-pip.py"
 
+$DOWNLOADS = "C:\Downloads\Cython"
 
-function DownloadPython ($python_version, $platform_suffix) {
-    $webclient = New-Object System.Net.WebClient
-    $filename = "python-" + $python_version + $platform_suffix + ".msi"
-    $url = $BASE_URL + $python_version + "/" + $filename
 
-    $basedir = $pwd.Path + "\"
-    $filepath = $basedir + $filename
-    if (Test-Path $filename) {
-        Write-Host "Reusing" $filepath
+function Download ($url, $filename, $destdir) {
+    if ($destdir) {
+        $item = New-Item $destdir -ItemType directory -Force
+        $destdir = $item.FullName
+    } else {
+        $destdir = $pwd.Path
+    }
+    $filepath = Join-Path $destdir $filename
+    if (Test-Path $filepath) {
+        Write-Host "Reusing" $filename "from" $destdir
         return $filepath
     }
-
-    # Download and retry up to 5 times in case of network transient errors.
     Write-Host "Downloading" $filename "from" $url
-    $retry_attempts = 3
-    for($i=0; $i -lt $retry_attempts; $i++){
+    $webclient = New-Object System.Net.WebClient
+    foreach($i in 1..3) {
         try {
             $webclient.DownloadFile($url, $filepath)
-            break
+            Write-Host "File saved at" $filepath
+            return $filepath
         }
-        Catch [Exception]{
+        Catch [Exception] {
             Start-Sleep 1
         }
     }
-   Write-Host "File saved at" $filepath
-   return $filepath
+    Write-Host "Failed to download" $filename "from" $url
+    return $null
 }
 
 
 function InstallPython ($python_version, $architecture, $python_home) {
-    Write-Host "Installing Python" $python_version "for" $architecture "bit architecture to" $python_home
+    Write-Host "Installing Python $python_version ($architecture-bit) to $python_home"
     if (Test-Path $python_home) {
         Write-Host $python_home "already exists, skipping."
-        return $false
+        return
+    }
+    $py_major = $python_version[0]; $py_minor = $python_version[2]
+    $installer_exe = ($py_major + $py_minor) -as [int] -ge 35
+    if ($installer_exe) {
+        $arch_suffix = @{"32"="";"64"="-amd64"}[$architecture]
+        $filename = "python-" + $python_version + $arch_suffix + ".exe"
+    } else {
+        $arch_suffix = @{"32"="";"64"=".amd64"}[$architecture]
+        $filename = "python-" + $python_version + $arch_suffix + ".msi"
     }
-    if ($architecture -eq "32") {
-        $platform_suffix = ""
+    $url = $PYTHON_BASE_URL + $python_version + "/" + $filename
+    $filepath = Download $url $filename $DOWNLOADS
+    Write-Host "Installing" $filename "to" $python_home
+    if ($installer_exe) {
+        $prog = "$filepath"
+        $args = "/quiet TargetDir=$python_home"
     } else {
-        $platform_suffix = ".amd64"
+        $prog = "msiexec.exe"
+        $args = "/quiet /qn /i $filepath TARGETDIR=$python_home"
     }
-    $filepath = DownloadPython $python_version $platform_suffix
-    Write-Host "Installing" $filepath "to" $python_home
-    $args = "/qn /i $filepath TARGETDIR=$python_home"
-    Write-Host "msiexec.exe" $args
-    Start-Process -FilePath "msiexec.exe" -ArgumentList $args -Wait
-    Write-Host "Python $python_version ($architecture) installation complete"
-    return $true
+    Write-Host $prog $args
+    Start-Process -FilePath $prog -ArgumentList $args -Wait
+    Write-Host "Python $python_version ($architecture-bit) installation complete"
 }
 
 
 function InstallPip ($python_home) {
-    $pip_path = $python_home + "\Scripts\pip.exe"
-    $python_path = $python_home + "\python.exe"
+    $python_path = Join-Path $python_home "python.exe"
+    $pip_path = Join-Path $python_home "Scripts\pip.exe"
     if (Test-Path $pip_path) {
         Write-Host "Upgrading pip"
         $args = "-m pip.__main__ install --upgrade pip"
@@ -71,24 +83,25 @@ function InstallPip ($python_home) {
         $webclient = New-Object System.Net.WebClient
         $webclient.DownloadFile($GET_PIP_URL, $GET_PIP_PATH)
         Write-Host "Executing:" $python_path $GET_PIP_PATH
-        Start-Process -FilePath "$python_path" -ArgumentList "$GET_PIP_PATH"
+        Start-Process -FilePath $python_path -ArgumentList "$GET_PIP_PATH" -Wait
         Write-Host "pip installation complete"
     }
-   Write-Host "Upgrading setuptools"
-   $args = "install --upgrade setuptools"
-   Write-Host "Executing:" $pip_path $args
-   Start-Process -FilePath $pip_path -ArgumentList $args -Wait
-   Write-Host "setuptools upgrade complete"
 }
 
-function InstallPipPackage ($python_home, $pkg) {
-    $pip_path = $python_home + "\Scripts\pip.exe"
-    & $pip_path install $pkg
+
+function InstallPipPackage ($python_home, $package) {
+    $pip_path = Join-Path $python_home "Scripts\pip.exe"
+    Write-Host "Installing/Upgrading $package"
+    $args = "install --upgrade $package"
+    Write-Host "Executing:" $pip_path $args
+    Start-Process -FilePath $pip_path -ArgumentList $args -Wait
+    Write-Host "$package install/upgrade complete"
 }
 
 function main () {
     InstallPython $env:PYTHON_VERSION $env:PYTHON_ARCH $env:PYTHON
     InstallPip $env:PYTHON
+    InstallPipPackage $env:PYTHON setuptools
     InstallPipPackage $env:PYTHON wheel
 }