Update installer scripts

externals/install-dotnet.ps1

@@ -340,9 +340,8 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel) {
     elseif ($Runtime -eq "aspnetcore") {
         $VersionFileUrl = "$UncachedFeed/aspnetcore/Runtime/$Channel/latest.version"
     }
-    # Currently, the WindowsDesktop runtime is manufactured with the .Net core runtime
     elseif ($Runtime -eq "windowsdesktop") {
-        $VersionFileUrl = "$UncachedFeed/Runtime/$Channel/latest.version"
+        $VersionFileUrl = "$UncachedFeed/WindowsDesktop/$Channel/latest.version"
     }
     elseif (-not $Runtime) {
         $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.version"
@@ -438,7 +437,16 @@ function Get-Download-Link([string]$AzureFeed, [string]$SpecificVersion, [string
         $PayloadURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/aspnetcore-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
     }
     elseif ($Runtime -eq "windowsdesktop") {
+        # The windows desktop runtime is part of the core runtime layout prior to 5.0
         $PayloadURL = "$AzureFeed/Runtime/$SpecificVersion/windowsdesktop-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
+        if ($SpecificVersion -match '^(\d+)\.(.*)$')
+        {
+            $majorVersion = [int]$Matches[1]
+            if ($majorVersion -ge 5)
+            {
+                $PayloadURL = "$AzureFeed/WindowsDesktop/$SpecificVersion/windowsdesktop-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
+            }
+        }
     }
     elseif (-not $Runtime) {
         $PayloadURL = "$AzureFeed/Sdk/$SpecificVersion/dotnet-sdk-$SpecificProductVersion-win-$CLIArchitecture.zip"
@@ -480,7 +488,16 @@ function Get-Product-Version([string]$AzureFeed, [string]$SpecificVersion) {
         $ProductVersionTxtURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/productVersion.txt"
     }
     elseif ($Runtime -eq "windowsdesktop") {
+        # The windows desktop runtime is part of the core runtime layout prior to 5.0
         $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/productVersion.txt"
+        if ($SpecificVersion -match '^(\d+)\.(.*)')
+        {
+            $majorVersion = [int]$Matches[1]
+            if ($majorVersion -ge 5)
+            {
+                $ProductVersionTxtURL = "$AzureFeed/WindowsDesktop/$SpecificVersion/productVersion.txt"
+            }
+        }
     }
     elseif (-not $Runtime) {
         $ProductVersionTxtURL = "$AzureFeed/Sdk/$SpecificVersion/productVersion.txt"
@@ -885,10 +902,10 @@ Say "Note that the script does not resolve dependencies during installation."
 Say "To check the list of dependencies, go to https://docs.microsoft.com/dotnet/core/install/windows#dependencies"
 Say "Installation finished"
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@@ -960,29 +977,29 @@ Say "Installation finished"
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@@ -1043,7 +1060,7 @@ Say "Installation finished"
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@@ -1052,27 +1069,27 @@ Say "Installation finished"
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 # SIG # End signature block

externals/install-dotnet.sh

@@ -303,7 +303,7 @@ get_machine_architecture() {
             echo "arm"
             return 0
             ;;
-        aarch64)
+        aarch64|arm64)
             echo "arm64"
             return 0
             ;;
@@ -744,13 +744,31 @@ download() {
     fi
 
     local failed=false
+    local attempts=0
+    while [ $attempts -lt 3 ]; do
+        attempts=$((attempts+1))
+        failed=false
         if machine_has "curl"; then
             downloadcurl "$remote_path" "$out_path" || failed=true
         elif machine_has "wget"; then
             downloadwget "$remote_path" "$out_path" || failed=true
         else
-        failed=true
+            unset http_code
+            download_error_msg="Missing dependency: neither curl nor wget was found."
+            break
         fi
+
+        if [ "$failed" = false ] || [ $attempts -ge 3 ] || { [ ! -z $http_code ] && [ $http_code = "404" ]; }; then
+            break
+        fi
+
+        say "Download attempt #$attempts has failed: $http_code $download_error_msg"
+        say "Attempt #$((attempts+1)) will start in $((attempts*10)) seconds."
+        sleep $((attempts*20))
+    done
+
+
+
     if [ "$failed" = true ]; then
         say_verbose "Download failed: $remote_path"
         return 1
@@ -761,6 +779,8 @@ download() {
 # Updates global variables $http_code and $download_error_msg
 downloadcurl() {
     eval $invocation
+    unset http_code
+    unset download_error_msg
     local remote_path="$1"
     local out_path="${2:-}"
     # Append feed_credential as late as possible before calling curl to avoid logging feed_credential
@@ -789,6 +809,8 @@ downloadcurl() {
 # Updates global variables $http_code and $download_error_msg
 downloadwget() {
     eval $invocation
+    unset http_code
+    unset download_error_msg
     local remote_path="$1"
     local out_path="${2:-}"
     # Append feed_credential as late as possible before calling wget to avoid logging feed_credential
@@ -882,7 +904,6 @@ install_dotnet() {
     say "Downloading primary link $download_link"
 
     # The download function will set variables $http_code and $download_error_msg in case of failure.
-    http_code=""; download_error_msg=""
     download "$download_link" "$zip_path" 2>&1 || download_failed=true
     primary_path_http_code="$http_code"; primary_path_download_error_msg="$download_error_msg"
 
@@ -906,7 +927,6 @@ install_dotnet() {
             say "Downloading legacy link $download_link"
 
             # The download function will set variables $http_code and $download_error_msg in case of failure.
-            http_code=""; download_error_msg=""
             download "$download_link" "$zip_path" 2>&1 || download_failed=true
             legacy_path_http_code="$http_code";  legacy_path_download_error_msg="$download_error_msg"