Update setup pip script

setup_pip.ps1

@@ -1,29 +1,29 @@
 $Version = $env:PYTHON_VERSION
 $PythonPath = $env:SETUP_PYTHON_PATH
 $Semver = $Version.Split('.')
-$pip = 0
 Write-Output "Setting up pip for python $Version in path $PythonPath"
-if ([int]$Semver[0] -eq 3 -and [int]$Semver[1] -ge 4) {
-    Write-Output "Using ensurepip..."
-    Invoke-Expression -Command "$PythonPath -m ensurepip"
-    if ([int]$Semver[1] -gt 4) {
-        Write-Output "Updating pip..."
-        Invoke-Expression -Command "$PythonPath -m pip install --upgrade pip"
-    }
-    $pip = 1
-} elseif ([int]$Semver[1] -ge 3) {
-    Write-Output "Using get_pip.py..."
-    $GetPipFile = New-TemporaryFile
-    Invoke-WebRequest -Uri 'https://bootstrap.pypa.io/pip/3.3/get-pip.py' -OutFile $GetPipFile
-    Invoke-Expression -Command "$PythonPath $GetPipFile"
-    Remove-Item $GetPipFile
-    $pip = 1
-}
-if ($pip) {
-    if ([int]$Semver[0] -eq 3 -and [int]$Semver[1] -lt 5) {
+if ([int]$Semver[0] -eq 3 -and [int]$Semver[1] -lt 5) {
+    if ([int]$Semver[1] -gt 2) {
+        Write-Output "Using get_pip.py..."
+        $VersionNumber = $Semver[0]
+        $Major = $Semver[1]
+        $GetPipFile = New-TemporaryFile
+        Invoke-WebRequest -Uri "https://bootstrap.pypa.io/pip/$VersionNumber.$Major/get-pip.py" -OutFile $GetPipFile
+        Invoke-Expression -Command "$PythonPath $GetPipFile"
         Write-Output "Installing typing for old Python versions..."
         Invoke-Expression -Command "$PythonPath -m pip install typing"
+        Remove-Item $GetPipFile
+        if ([int]$Semver[1] -eq 4) {
+            Invoke-Expression -Command "$PythonPath -m pip install --upgrade wheel setuptools"
+        }
+    } else {
+        Write-Output "Pip is not available for version $Version"
+        Write-Output "Proceed with manualk installation at own risk"
     }
+} else {
+    Write-Output "Using ensurepip..."
+    Invoke-Expression -Command "$PythonPath -m ensurepip"
+    Invoke-Expression -Command "$PythonPath -m pip install --upgrade pip"
     Write-Output "Installing wheel and setuptools..."
     Invoke-Expression -Command "$PythonPath -m pip install --upgrade wheel setuptools"
 }