Update installers scripts

externals/install-dotnet.ps1

@@ -16,15 +16,27 @@
     - LTS - most current supported release
     - 2-part version in a format A.B - represents a specific release
           examples: 2.0, 1.0
-    - Branch name
+    - 3-part version in a format A.B.Cxx - represents a specific SDK release
-          examples: release/2.0.0, Master
+          examples: 5.0.1xx, 5.0.2xx
-    Note: The version parameter overrides the channel parameter.
+          Supported since 5.0 release
+    Note: The version parameter overrides the channel parameter when any version other than 'latest' is used.
+.PARAMETER Quality
+    Download the latest build of specified quality in the channel. The possible values are: daily, signed, validated, preview, GA.
+    Works only in combination with channel. Not applicable for current and LTS channels and will be ignored if those channels are used. 
+    For SDK use channel in A.B.Cxx format: using quality together with channel in A.B format is not supported.
+    Supported since 5.0 release.
+    Note: The version parameter overrides the channel parameter when any version other than 'latest' is used, and therefore overrides the quality.     
 .PARAMETER Version
     Default: latest
     Represents a build version on specific channel. Possible values:
     - latest - most latest build on specific channel
     - 3-part version in a format A.B.C - represents specific version of build
           examples: 2.0.0-preview2-006120, 1.1.0
+.PARAMETER Internal
+    Download internal builds. Requires providing credentials via -FeedCredential parameter.
+.PARAMETER FeedCredential
+    Token to access Azure feed. Used as a query string to append to the Azure feed.
+    This parameter typically is not specified.
 .PARAMETER InstallDir
     Default: %LocalAppData%\Microsoft\dotnet
     Path to where to install dotnet. Note that binaries will be placed directly in a given directory.
@@ -59,9 +71,6 @@
 .PARAMETER UncachedFeed
     This parameter typically is not changed by the user.
     It allows changing the URL for the Uncached feed used by this installer.
-.PARAMETER FeedCredential
-    Used as a query string to append to the Azure feed.
-    It allows changing the URL to use non-public blob storage accounts.
 .PARAMETER ProxyAddress
     If set, the installer will use the proxy when making web requests
 .PARAMETER ProxyUseDefaultCredentials
@@ -81,11 +90,12 @@
 [cmdletbinding()]
 param(
    [string]$Channel="LTS",
+   [string]$Quality,
    [string]$Version="Latest",
+   [switch]$Internal,
    [string]$JSonFile,
    [string]$InstallDir="<auto>",
    [string]$Architecture="<auto>",
-   [ValidateSet("dotnet", "aspnetcore", "windowsdesktop", IgnoreCase = $false)]
    [string]$Runtime,
    [Obsolete("This parameter may be removed in a future version of this script. The recommended alternative is '-Runtime dotnet'.")]
    [switch]$SharedRuntime,
@@ -205,7 +215,7 @@ function Get-Machine-Architecture() {
 function Get-CLIArchitecture-From-Architecture([string]$Architecture) {
     Say-Invocation $MyInvocation
 
-    switch ($Architecture.ToLower()) {
+    switch ($Architecture.ToLowerInvariant()) {
         { $_ -eq "<auto>" } { return Get-CLIArchitecture-From-Architecture $(Get-Machine-Architecture) }
         { ($_ -eq "amd64") -or ($_ -eq "x64") } { return "x64" }
         { $_ -eq "x86" } { return "x86" }
@@ -215,6 +225,53 @@ function Get-CLIArchitecture-From-Architecture([string]$Architecture) {
     }
 }
 
+
+function Get-NormalizedQuality([string]$Quality) {
+    Say-Invocation $MyInvocation
+
+    if ([string]::IsNullOrEmpty($Quality)) {
+        return ""
+    }
+
+    switch ($Quality) {
+        { @("daily", "signed", "validated", "preview") -contains $_ } { return $Quality.ToLowerInvariant() }
+        #ga quality is available without specifying quality, so normalizing it to empty
+        { $_ -eq "ga" } { return "" }
+        default { throw "'$Quality' is not a supported value for -Quality option. Supported values are: daily, signed, validated, preview, ga. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues." }
+    }
+}
+
+function Get-NormalizedChannel([string]$Channel) {
+    Say-Invocation $MyInvocation
+
+    if ([string]::IsNullOrEmpty($Channel)) {
+        return ""
+    }
+
+    if ($Channel.StartsWith('release/')) {
+        Say-Warning 'Using branch name with -Channel option is no longer supported with newer releases. Use -Quality option with a channel in X.Y format instead, such as "-Channel 5.0 -Quality Daily."'
+    }
+
+    switch ($Channel) {
+        { $_ -eq "lts" } { return "LTS" }
+        { $_ -eq "current" } { return "current" }
+        default { return $Channel.ToLowerInvariant() }
+    }
+}
+
+function Get-NormalizedProduct([string]$Runtime) {
+    Say-Invocation $MyInvocation
+
+    switch ($Runtime) {
+        { $_ -eq "dotnet" } { return "dotnet-runtime" }
+        { $_ -eq "aspnetcore" } { return "aspnetcore-runtime" }
+        { $_ -eq "windowsdesktop" } { return "windowsdesktop-runtime" }
+        { [string]::IsNullOrEmpty($_) } { return "dotnet-sdk" }
+        default { throw "'$Runtime' is not a supported value for -Runtime option, supported values are: dotnet, aspnetcore, windowsdesktop. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues." }
+    }
+}
+
+
 # The version text returned from the feeds is a 1-line or 2-line string:
 # For the SDK and the dotnet runtime (2 lines):
 # Line 1: # commit_hash
@@ -243,7 +300,7 @@ function Load-Assembly([string] $Assembly) {
     }
 }
 
-function GetHTTPResponse([Uri] $Uri)
+function GetHTTPResponse([Uri] $Uri, [bool]$HeaderOnly, [bool]$DisableRedirect, [bool]$DisableFeedCredential)
 {
     Invoke-With-Retry(
     {
@@ -270,26 +327,42 @@ function GetHTTPResponse([Uri] $Uri)
                 }
             }
 
+            $HttpClientHandler = New-Object System.Net.Http.HttpClientHandler
             if($ProxyAddress) {
-                $HttpClientHandler = New-Object System.Net.Http.HttpClientHandler
                 $HttpClientHandler.Proxy =  New-Object System.Net.WebProxy -Property @{
                     Address=$ProxyAddress;
                     UseDefaultCredentials=$ProxyUseDefaultCredentials;
                     BypassList = $ProxyBypassList;
                 }
-                $HttpClient = New-Object System.Net.Http.HttpClient -ArgumentList $HttpClientHandler
+            }       
+            if ($DisableRedirect)
+            {
+                $HttpClientHandler.AllowAutoRedirect = $false
             }
-            else {
+            $HttpClient = New-Object System.Net.Http.HttpClient -ArgumentList $HttpClientHandler
 
-                $HttpClient = New-Object System.Net.Http.HttpClient
-            }
             # Default timeout for HttpClient is 100s.  For a 50 MB download this assumes 500 KB/s average, any less will time out
             # 20 minutes allows it to work over much slower connections.
             $HttpClient.Timeout = New-TimeSpan -Minutes 20
-            $Task = $HttpClient.GetAsync("${Uri}${FeedCredential}").ConfigureAwait("false");
+
+            if ($HeaderOnly){
+                $completionOption = [System.Net.Http.HttpCompletionOption]::ResponseHeadersRead
+            }
+            else {
+                $completionOption = [System.Net.Http.HttpCompletionOption]::ResponseContentRead
+            }
+
+            if ($DisableFeedCredential) {
+                $UriWithCredential = $Uri
+            }
+            else {
+                $UriWithCredential = "${Uri}${FeedCredential}"
+            }
+
+            $Task = $HttpClient.GetAsync("$UriWithCredential", $completionOption).ConfigureAwait("false");
             $Response = $Task.GetAwaiter().GetResult();
 
-            if (($null -eq $Response) -or (-not ($Response.IsSuccessStatusCode))) {
+            if (($null -eq $Response) -or ((-not $HeaderOnly) -and (-not ($Response.IsSuccessStatusCode)))) {
                 # The feed credential is potentially sensitive info. Do not log FeedCredential to console output.
                 $DownloadException = [System.Exception] "Unable to download $Uri."
 
@@ -349,6 +422,9 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel) {
     else {
         throw "Invalid value for `$Runtime"
     }
+
+    Say-Verbose "Constructed latest.version URL: $VersionFileUrl"
+
     try {
         $Response = GetHTTPResponse -Uri $VersionFileUrl
     }
@@ -411,7 +487,7 @@ function Get-Specific-Version-From-Version([string]$AzureFeed, [string]$Channel,
     Say-Invocation $MyInvocation
 
     if (-not $JSonFile) {
-        if ($Version.ToLower() -eq "latest") {
+        if ($Version.ToLowerInvariant() -eq "latest") {
             $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel
             return $LatestVersionInfo.Version
         }
@@ -478,58 +554,116 @@ function Get-LegacyDownload-Link([string]$AzureFeed, [string]$SpecificVersion, [
     return $PayloadURL
 }
 
-function Get-Product-Version([string]$AzureFeed, [string]$SpecificVersion) {
+function Get-Product-Version([string]$AzureFeed, [string]$SpecificVersion, [string]$PackageDownloadLink) {
     Say-Invocation $MyInvocation
 
-    if ($Runtime -eq "dotnet") {
+    # Try to get the version number, using the productVersion.txt file located next to the installer file.
-        $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/productVersion.txt"
+    $ProductVersionTxtURLs = (Get-Product-Version-Url $AzureFeed $SpecificVersion $PackageDownloadLink -Flattened $true),
-    }
+                             (Get-Product-Version-Url $AzureFeed $SpecificVersion $PackageDownloadLink -Flattened $false)
-    elseif ($Runtime -eq "aspnetcore") {
+    
-        $ProductVersionTxtURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/productVersion.txt"
+    Foreach ($ProductVersionTxtURL in $ProductVersionTxtURLs) {
-    }
+        Say-Verbose "Checking for the existence of $ProductVersionTxtURL"
-    elseif ($Runtime -eq "windowsdesktop") {
+
-        # The windows desktop runtime is part of the core runtime layout prior to 5.0
+        try {
-        $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/productVersion.txt"
+            $productVersionResponse = GetHTTPResponse($productVersionTxtUrl)
-        if ($SpecificVersion -match '^(\d+)\.(.*)')
+
-        {
+            if ($productVersionResponse.StatusCode -eq 200) {
-            $majorVersion = [int]$Matches[1]
+                $productVersion = $productVersionResponse.Content.ReadAsStringAsync().Result.Trim()
-            if ($majorVersion -ge 5)
+                if ($productVersion -ne $SpecificVersion)
-            {
+                {
-                $ProductVersionTxtURL = "$AzureFeed/WindowsDesktop/$SpecificVersion/productVersion.txt"
+                    Say "Using alternate version $productVersion found in $ProductVersionTxtURL"
+                }
+                return $productVersion
             }
+            else {
+                Say-Verbose "Got StatusCode $($productVersionResponse.StatusCode) when trying to get productVersion.txt at $productVersionTxtUrl."
+            }
+        } 
+        catch {
+            Say-Verbose "Could not read productVersion.txt at $productVersionTxtUrl (Exception: '$($_.Exception.Message)'. )"
         }
     }
-    elseif (-not $Runtime) {
+
-        $ProductVersionTxtURL = "$AzureFeed/Sdk/$SpecificVersion/productVersion.txt"
+    # Getting the version number with productVersion.txt has failed. Try parsing the download link for a version number.
-    }
+    if ([string]::IsNullOrEmpty($PackageDownloadLink))
-    else {
+    {
-        throw "Invalid value '$Runtime' specified for `$Runtime"
+        Say-Verbose "Using the default value '$SpecificVersion' as the product version."
+        return $SpecificVersion
     }
 
-    Say-Verbose "Checking for existence of $ProductVersionTxtURL"
+    $productVersion = Get-ProductVersionFromDownloadLink $PackageDownloadLink $SpecificVersion
+    return $productVersion
+}
 
-    try {
+function Get-Product-Version-Url([string]$AzureFeed, [string]$SpecificVersion, [string]$PackageDownloadLink, [bool]$Flattened) {
-        $productVersionResponse = GetHTTPResponse($productVersionTxtUrl)
+    Say-Invocation $MyInvocation
 
-        if ($productVersionResponse.StatusCode -eq 200) {
+    $majorVersion=$null
-            $productVersion = $productVersionResponse.Content.ReadAsStringAsync().Result.Trim()
+    if ($SpecificVersion -match '^(\d+)\.(.*)') {
-            if ($productVersion -ne $SpecificVersion)
+        $majorVersion = $Matches[1] -as[int]
-            {
+    }
-                Say "Using alternate version $productVersion found in $ProductVersionTxtURL"
-            }
 
-            return $productVersion
+    $pvFileName='productVersion.txt'
+    if($Flattened) {
+        if(-not $Runtime) {
+            $pvFileName='sdk-productVersion.txt'
+        }
+        elseif($Runtime -eq "dotnet") {
+            $pvFileName='runtime-productVersion.txt'
         }
         else {
-            Say-Verbose "Got StatusCode $($productVersionResponse.StatusCode) trying to get productVersion.txt at $productVersionTxtUrl, so using default value of $SpecificVersion"
+            $pvFileName="$Runtime-productVersion.txt"
-            $productVersion = $SpecificVersion
         }
-    } catch {
-        Say-Verbose "Could not read productVersion.txt at $productVersionTxtUrl, so using default value of $SpecificVersion (Exception: '$($_.Exception.Message)' )"
-        $productVersion = $SpecificVersion
     }
 
-    return $productVersion
+    if ([string]::IsNullOrEmpty($PackageDownloadLink)) {
+        if ($Runtime -eq "dotnet") {
+            $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/$pvFileName"
+        }
+        elseif ($Runtime -eq "aspnetcore") {
+            $ProductVersionTxtURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/$pvFileName"
+        }
+        elseif ($Runtime -eq "windowsdesktop") {
+            # The windows desktop runtime is part of the core runtime layout prior to 5.0
+            $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/$pvFileName"
+            if ($majorVersion -ne $null -and $majorVersion -ge 5) {
+                $ProductVersionTxtURL = "$AzureFeed/WindowsDesktop/$SpecificVersion/$pvFileName"
+            }
+        }
+        elseif (-not $Runtime) {
+            $ProductVersionTxtURL = "$AzureFeed/Sdk/$SpecificVersion/$pvFileName"
+        }
+        else {
+            throw "Invalid value '$Runtime' specified for `$Runtime"
+        }
+    }
+    else {
+        $ProductVersionTxtURL = $PackageDownloadLink.Substring(0, $PackageDownloadLink.LastIndexOf("/"))  + "/$pvFileName"
+    }
+
+    Say-Verbose "Constructed productVersion link: $ProductVersionTxtURL"
+
+    return $ProductVersionTxtURL
+}
+
+function Get-ProductVersionFromDownloadLink([string]$PackageDownloadLink, [string]$SpecificVersion)
+{
+    Say-Invocation $MyInvocation
+
+    #product specific version follows the product name
+    #for filename 'dotnet-sdk-3.1.404-win-x64.zip': the product version is 3.1.400
+    $filename = $PackageDownloadLink.Substring($PackageDownloadLink.LastIndexOf("/") + 1)
+    $filenameParts = $filename.Split('-')
+    if ($filenameParts.Length -gt 2)
+    {
+        $productVersion = $filenameParts[2]
+        Say-Verbose "Extracted product version '$productVersion' from download link '$PackageDownloadLink'."
+    }
+    else {
+        Say-Verbose "Using the default value '$SpecificVersion' as the product version."
+        $productVersion = $SpecificVersion
+    }
+    return $productVersion 
 }
 
 function Get-User-Share-Path() {
@@ -702,15 +836,150 @@ function Prepend-Sdk-InstallRoot-To-Path([string]$InstallRoot, [string]$BinFolde
     }
 }
 
+function Get-AkaMSDownloadLink([string]$Channel, [string]$Quality, [bool]$Internal, [string]$Product, [string]$Architecture) {
+    Say-Invocation $MyInvocation 
+
+    #quality is not supported for LTS or current channel
+    if (![string]::IsNullOrEmpty($Quality) -and (@("LTS", "current") -contains $Channel)) {
+        $Quality = ""
+        Say-Warning "Specifying quality for current or LTS channel is not supported, the quality will be ignored."
+    }
+    Say-Verbose "Retrieving primary payload URL from aka.ms link for channel: '$Channel', quality: '$Quality' product: '$Product', os: 'win', architecture: '$Architecture'." 
+   
+    #construct aka.ms link
+    $akaMsLink = "https://aka.ms/dotnet"
+    if ($Internal) {
+        $akaMsLink += "/internal"
+    }
+    $akaMsLink += "/$Channel"
+    if (-not [string]::IsNullOrEmpty($Quality)) {
+        $akaMsLink +="/$Quality"
+    }
+    $akaMsLink +="/$Product-win-$Architecture.zip"
+    Say-Verbose  "Constructed aka.ms link: '$akaMsLink'."
+    $akaMsDownloadLink=$null
+
+    for ($maxRedirections = 9; $maxRedirections -ge 0; $maxRedirections--)
+    {
+        #get HTTP response
+        #do not pass credentials as a part of the $akaMsLink and do not apply credentials in the GetHTTPResponse function
+        #otherwise the redirect link would have credentials as well
+        #it would result in applying credentials twice to the resulting link and thus breaking it, and in echoing credentials to the output as a part of redirect link
+        $Response= GetHTTPResponse -Uri $akaMsLink -HeaderOnly $true -DisableRedirect $true -DisableFeedCredential $true
+        Say-Verbose "Received response:`n$Response"
+
+        if ([string]::IsNullOrEmpty($Response)) {
+            Say-Verbose "The link '$akaMsLink' is not valid: failed to get redirect location. The resource is not available."
+            return $null
+        }
+
+        #if HTTP code is 301 (Moved Permanently), the redirect link exists
+        if  ($Response.StatusCode -eq 301)
+        {
+            try {
+                $akaMsDownloadLink = $Response.Headers.GetValues("Location")[0]
+
+                if ([string]::IsNullOrEmpty($akaMsDownloadLink)) {
+                    Say-Verbose "The link '$akaMsLink' is not valid: server returned 301 (Moved Permanently), but the headers do not contain the redirect location."
+                    return $null
+                }
+
+                Say-Verbose "The redirect location retrieved: '$akaMsDownloadLink'."
+                # This may yet be a link to another redirection. Attempt to retrieve the page again.
+                $akaMsLink = $akaMsDownloadLink
+                continue
+            }
+            catch {
+                Say-Verbose "The link '$akaMsLink' is not valid: failed to get redirect location."
+                return $null
+            }
+        }
+        elseif ((($Response.StatusCode -lt 300) -or ($Response.StatusCode -ge 400)) -and (-not [string]::IsNullOrEmpty($akaMsDownloadLink)))
+        {
+            # Redirections have ended.
+            return $akaMsDownloadLink
+        }
+
+        Say-Verbose "The link '$akaMsLink' is not valid: failed to retrieve the redirection location."
+        return $null
+    }
+
+    Say-Verbose "Aka.ms links have redirected more than the maximum allowed redirections. This may be caused by a cyclic redirection of aka.ms links."
+    return $null
+
+}
+
 Say "Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:"
 Say "- The SDK needs to be installed without user interaction and without admin rights."
 Say "- The SDK installation doesn't need to persist across multiple CI runs."
 Say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.`r`n"
 
+if ($Internal -and [string]::IsNullOrWhitespace($FeedCredential)) {
+    $message = "Provide credentials via -FeedCredential parameter."
+    if ($DryRun) {
+        Say-Warning "$message"
+    } else {
+        throw "$message"
+    }
+}
+
+#FeedCredential should start with "?", for it to be added to the end of the link.
+#adding "?" at the beginning of the FeedCredential if needed.
+if ((![string]::IsNullOrWhitespace($FeedCredential)) -and ($FeedCredential[0] -ne '?')) {
+    $FeedCredential = "?" + $FeedCredential
+}
+
 $CLIArchitecture = Get-CLIArchitecture-From-Architecture $Architecture
-$SpecificVersion = Get-Specific-Version-From-Version -AzureFeed $AzureFeed -Channel $Channel -Version $Version -JSonFile $JSonFile
+$NormalizedQuality = Get-NormalizedQuality $Quality
-$DownloadLink, $EffectiveVersion = Get-Download-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
+Say-Verbose "Normalized quality: '$NormalizedQuality'"
-$LegacyDownloadLink = Get-LegacyDownload-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
+$NormalizedChannel = Get-NormalizedChannel $Channel
+Say-Verbose "Normalized channel: '$NormalizedChannel'"
+$NormalizedProduct = Get-NormalizedProduct $Runtime
+Say-Verbose "Normalized product: '$NormalizedProduct'"
+$DownloadLink = $null
+
+#try to get download location from aka.ms link
+#not applicable when exact version is specified via command or json file
+if ([string]::IsNullOrEmpty($JSonFile) -and ($Version -eq "latest")) {
+    $AkaMsDownloadLink = Get-AkaMSDownloadLink -Channel $NormalizedChannel -Quality $NormalizedQuality -Internal $Internal -Product $NormalizedProduct -Architecture $CLIArchitecture
+   
+    if ([string]::IsNullOrEmpty($AkaMsDownloadLink)){
+        if (-not [string]::IsNullOrEmpty($NormalizedQuality)) {
+            # if quality is specified - exit with error - there is no fallback approach
+            Say-Error "Failed to locate the latest version in the channel '$NormalizedChannel' with '$NormalizedQuality' quality for '$NormalizedProduct', os: 'win', architecture: '$CLIArchitecture'."
+            Say-Error "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support."
+            throw "aka.ms link resolution failure"
+        }
+        Say-Verbose "Falling back to latest.version file approach."
+    }
+    else {
+        Say-Verbose "Retrieved primary named payload URL from aka.ms link: '$AkaMsDownloadLink'."
+        $DownloadLink = $AkaMsDownloadLink
+        Say-Verbose  "Downloading using legacy url will not be attempted."
+        $LegacyDownloadLink = $null
+
+        #get version from the path
+        $pathParts = $DownloadLink.Split('/')
+        if ($pathParts.Length -ge 2) { 
+            $SpecificVersion = $pathParts[$pathParts.Length - 2]
+            Say-Verbose "Version: '$SpecificVersion'."
+        }
+        else {
+            Say-Error "Failed to extract the version from download link '$DownloadLink'."
+        }
+
+        #retrieve effective (product) version
+        $EffectiveVersion = Get-Product-Version -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -PackageDownloadLink $DownloadLink
+        Say-Verbose "Product version: '$EffectiveVersion'."
+    }
+}
+
+if ([string]::IsNullOrEmpty($DownloadLink)) {
+    $SpecificVersion = Get-Specific-Version-From-Version -AzureFeed $AzureFeed -Channel $Channel -Version $Version -JSonFile $JSonFile
+    $DownloadLink, $EffectiveVersion = Get-Download-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
+    $LegacyDownloadLink = Get-LegacyDownload-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
+}
+
 
 $InstallRoot = Resolve-Installation-Path $InstallDir
 Say-Verbose "InstallRoot: $InstallRoot"
@@ -718,9 +987,9 @@ $ScriptName = $MyInvocation.MyCommand.Name
 
 if ($DryRun) {
     Say "Payload URLs:"
-    Say "Primary named payload URL: $DownloadLink"
+    Say "Primary named payload URL: ${DownloadLink}"
     if ($LegacyDownloadLink) {
-        Say "Legacy named payload URL: $LegacyDownloadLink"
+        Say "Legacy named payload URL: ${LegacyDownloadLink}"
     }
     $RepeatableCommand = ".\$ScriptName -Version `"$SpecificVersion`" -InstallDir `"$InstallRoot`" -Architecture `"$CLIArchitecture`""
     if ($Runtime -eq "dotnet") {
@@ -729,11 +998,20 @@ if ($DryRun) {
     elseif ($Runtime -eq "aspnetcore") {
        $RepeatableCommand+=" -Runtime `"aspnetcore`""
     }
+
+    if (-not [string]::IsNullOrEmpty($NormalizedQuality))
+    {
+        $RepeatableCommand+=" -Quality `"$NormalizedQuality`""
+    }
+
     foreach ($key in $MyInvocation.BoundParameters.Keys) {
-        if (-not (@("Architecture","Channel","DryRun","InstallDir","Runtime","SharedRuntime","Version") -contains $key)) {
+        if (-not (@("Architecture","Channel","DryRun","InstallDir","Runtime","SharedRuntime","Version","Quality","FeedCredential") -contains $key)) {
             $RepeatableCommand+=" -$key `"$($MyInvocation.BoundParameters[$key])`""
         }
     }
+    if ($MyInvocation.BoundParameters.Keys -contains "FeedCredential") {
+        $RepeatableCommand+=" -FeedCredential `"<feedCredential>`""
+    }
     Say "Repeatable invocation: $RepeatableCommand"
     if ($SpecificVersion -ne $EffectiveVersion)
     {
@@ -779,9 +1057,16 @@ if ($isAssetInstalled) {
 
 New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null
 
-$installDrive = $((Get-Item $InstallRoot).PSDrive.Name);
+$installDrive = $((Get-Item $InstallRoot -Force).PSDrive.Name);
-$diskInfo = Get-PSDrive -Name $installDrive
+$diskInfo = $null
-if ($diskInfo.Free / 1MB -le 100) {
+try{
+    $diskInfo = Get-PSDrive -Name $installDrive
+}
+catch{
+    Say-Warning "Failed to check the disk space. Installation will continue, but it may fail if you do not have enough disk space."
+}
+
+if ( ($diskInfo -ne $null) -and ($diskInfo.Free / 1MB -le 100)) {
     throw "There is not enough disk space on drive ${installDrive}:"
 }
 
@@ -902,42 +1187,42 @@ 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"
 # SIG # Begin signature block
-# MIIjjwYJKoZIhvcNAQcCoIIjgDCCI3wCAQExDzANBglghkgBZQMEAgEFADB5Bgor
+# MIIjkgYJKoZIhvcNAQcCoIIjgzCCI38CAQExDzANBglghkgBZQMEAgEFADB5Bgor
 # BgEEAYI3AgEEoGswaTA0BgorBgEEAYI3AgEeMCYCAwEAAAQQH8w7YFlLCE63JNLG
-# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCCNsnhcJvx/hXmM
+# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCAGF/0aIv/nK8pL
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@@ -977,55 +1262,55 @@ Say "Installation finished"
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@@ -1060,36 +1345,36 @@ Say "Installation finished"
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 # SIG # End signature block

externals/install-dotnet.sh

@@ -24,7 +24,7 @@ exec 3>&1
 # See if stdout is a terminal
 if [ -t 1 ] && command -v tput > /dev/null; then
     # see if it supports colors
-    ncolors=$(tput colors)
+    ncolors=$(tput colors || echo 0)
     if [ -n "$ncolors" ] && [ $ncolors -ge 8 ]; then
         bold="$(tput bold       || echo)"
         normal="$(tput sgr0     || echo)"
@@ -368,6 +368,75 @@ get_normalized_os() {
     return 0
 }
 
+# args:
+# quality - $1
+get_normalized_quality() {
+    eval $invocation
+
+    local quality="$(to_lowercase "$1")"
+    if [ ! -z "$quality" ]; then
+        case "$quality" in
+            daily | signed | validated | preview)
+                echo "$quality"
+                return 0
+                ;;
+            ga)
+                #ga quality is available without specifying quality, so normalizing it to empty
+                return 0
+                ;;
+            *)
+                say_err "'$quality' is not a supported value for --quality option. Supported values are: daily, signed, validated, preview, ga. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues."
+                return 1
+                ;;
+        esac
+    fi
+    return 0
+}
+
+# args:
+# channel - $1
+get_normalized_channel() {
+    eval $invocation
+
+    local channel="$(to_lowercase "$1")"
+
+    if [[ $channel == release/* ]]; then
+        say_warning 'Using branch name with -Channel option is no longer supported with newer releases. Use -Quality option with a channel in X.Y format instead.';
+    fi
+
+    if [ ! -z "$channel" ]; then
+        case "$channel" in
+            lts)
+                echo "LTS"
+                return 0
+                ;;
+            *)
+                echo "$channel"
+                return 0
+                ;;
+        esac
+    fi
+
+    return 0
+}
+
+# args:
+# runtime - $1
+get_normalized_product() {
+    eval $invocation
+
+    local runtime="$(to_lowercase "$1")"
+    if [[ "$runtime" == "dotnet" ]]; then
+        product="dotnet-runtime"
+    elif [[ "$runtime" == "aspnetcore" ]]; then
+        product="aspnetcore-runtime"
+    elif [ -z "$runtime" ]; then
+        product="dotnet-sdk"
+    fi
+    echo "$product"
+    return 0
+}
+
 # The version text returned from the feeds is a 1-line or 2-line string:
 # For the SDK and the dotnet runtime (2 lines):
 # Line 1: # commit_hash
@@ -541,43 +610,131 @@ construct_download_link() {
 # args:
 # azure_feed - $1
 # specific_version - $2
+# download link - $3 (optional)
 get_specific_product_version() {
     # If we find a 'productVersion.txt' at the root of any folder, we'll use its contents
     # to resolve the version of what's in the folder, superseding the specified version.
+    # if 'productVersion.txt' is missing but download link is already available, product version will be taken from download link
     eval $invocation
 
     local azure_feed="$1"
     local specific_version="${2//[$'\t\r\n']}"
-    local specific_product_version=$specific_version
+    local package_download_link=""
+    if [ $# -gt 2  ]; then
+        local package_download_link="$3"
+    fi
+    local specific_product_version=null
+
+    # Try to get the version number, using the productVersion.txt file located next to the installer file.
+    local download_links=($(get_specific_product_version_url "$azure_feed" "$specific_version" true "$package_download_link")
+        $(get_specific_product_version_url "$azure_feed" "$specific_version" false "$package_download_link"))
+
+    for download_link in "${download_links[@]}"
+    do
+        say_verbose "Checking for the existence of $download_link"
+
+        if machine_has "curl"
+        then
+            specific_product_version=$(curl -s --fail "${download_link}${feed_credential}")
+            if [ $? = 0 ]; then
+                echo "${specific_product_version//[$'\t\r\n']}"
+                return 0
+            fi
+        elif machine_has "wget"
+        then
+            specific_product_version=$(wget -qO- "${download_link}${feed_credential}")
+            if [ $? = 0 ]; then
+                echo "${specific_product_version//[$'\t\r\n']}"
+                return 0
+            fi
+        fi
+    done
+    
+    # Getting the version number with productVersion.txt has failed. Try parsing the download link for a version number.
+    say_verbose "Failed to get the version using productVersion.txt file. Download link will be parsed instead."
+    specific_product_version="$(get_product_specific_version_from_download_link "$package_download_link" "$specific_version")"
+    echo "${specific_product_version//[$'\t\r\n']}"
+    return 0
+}
+
+# args:
+# azure_feed - $1
+# specific_version - $2
+# is_flattened - $3
+# download link - $4 (optional)
+get_specific_product_version_url() {
+    eval $invocation
+
+    local azure_feed="$1"
+    local specific_version="$2"
+    local is_flattened="$3"
+    local package_download_link=""
+    if [ $# -gt 3  ]; then
+        local package_download_link="$4"
+    fi
+
+    local pvFileName="productVersion.txt"
+    if [ "$is_flattened" = true ]; then
+        if [ -z "$runtime" ]; then
+            pvFileName="sdk-productVersion.txt"
+        elif [[ "$runtime" == "dotnet" ]]; then
+            pvFileName="runtime-productVersion.txt"
+        else
+            pvFileName="$runtime-productVersion.txt"
+        fi
+    fi
 
     local download_link=null
-    if [[ "$runtime" == "dotnet" ]]; then
+
-        download_link="$azure_feed/Runtime/$specific_version/productVersion.txt${feed_credential}"
+    if [ -z "$package_download_link" ]; then
-    elif [[ "$runtime" == "aspnetcore" ]]; then
+        if [[ "$runtime" == "dotnet" ]]; then
-        download_link="$azure_feed/aspnetcore/Runtime/$specific_version/productVersion.txt${feed_credential}"
+            download_link="$azure_feed/Runtime/$specific_version/${pvFileName}"
-    elif [ -z "$runtime" ]; then
+        elif [[ "$runtime" == "aspnetcore" ]]; then
-        download_link="$azure_feed/Sdk/$specific_version/productVersion.txt${feed_credential}"
+            download_link="$azure_feed/aspnetcore/Runtime/$specific_version/${pvFileName}"
+        elif [ -z "$runtime" ]; then
+            download_link="$azure_feed/Sdk/$specific_version/${pvFileName}"
+        else
+            return 1
+        fi
     else
-        return 1
+        download_link="${package_download_link%/*}/${pvFileName}"
     fi
 
-    if machine_has "curl"
+    say_verbose "Constructed productVersion link: $download_link"
-    then
+    echo "$download_link"
-        specific_product_version=$(curl -s --fail "$download_link")
+    return 0
-        if [ $? -ne 0 ]
+}
-        then
-            specific_product_version=$specific_version
-        fi
-    elif machine_has "wget"
-    then
-        specific_product_version=$(wget -qO- "$download_link")
-        if [ $? -ne 0 ]
-        then
-            specific_product_version=$specific_version
-        fi
-    fi
-    specific_product_version="${specific_product_version//[$'\t\r\n']}"
 
+# args:
+# download link - $1
+# specific version - $2
+get_product_specific_version_from_download_link()
+{
+    eval $invocation
+
+    local download_link="$1"
+    local specific_version="$2"
+    local specific_product_version="" 
+
+    if [ -z "$download_link" ]; then
+        echo "$specific_version"
+        return 0
+    fi
+
+    #get filename
+    filename="${download_link##*/}"
+
+    #product specific version follows the product name
+    #for filename 'dotnet-sdk-3.1.404-linux-x64.tar.gz': the product version is 3.1.404
+    IFS='-'
+    read -ra filename_elems <<< "$filename"
+    count=${#filename_elems[@]}
+    if [[ "$count" -gt 2 ]]; then
+        specific_product_version="${filename_elems[2]}"
+    else
+        specific_product_version=$specific_version
+    fi
+    unset IFS;
     echo "$specific_product_version"
     return 0
 }
@@ -711,19 +868,62 @@ extract_dotnet_package() {
     return 0
 }
 
+# args:
+# remote_path - $1
+# disable_feed_credential - $2
+get_http_header()
+{
+    eval $invocation
+    local remote_path="$1"
+    local disable_feed_credential="$2"
+
+    local failed=false
+    local response
+    if machine_has "curl"; then
+        get_http_header_curl $remote_path $disable_feed_credential || failed=true
+    elif machine_has "wget"; then
+        get_http_header_wget $remote_path $disable_feed_credential || failed=true
+    else
+        failed=true
+    fi
+    if [ "$failed" = true ]; then
+        say_verbose "Failed to get HTTP header: '$remote_path'."
+        return 1
+    fi
+    return 0
+}
+
+# args:
+# remote_path - $1
+# disable_feed_credential - $2
 get_http_header_curl() {
     eval $invocation
     local remote_path="$1"
-    remote_path_with_credential="${remote_path}${feed_credential}"
+    local disable_feed_credential="$2"
+
+    remote_path_with_credential="$remote_path"
+    if [ "$disable_feed_credential" = false ]; then
+        remote_path_with_credential+="$feed_credential"
+    fi
+
     curl_options="-I -sSL --retry 5 --retry-delay 2 --connect-timeout 15 "
     curl $curl_options "$remote_path_with_credential" || return 1
     return 0
 }
 
+# args:
+# remote_path - $1
+# disable_feed_credential - $2
 get_http_header_wget() {
     eval $invocation
     local remote_path="$1"
-    remote_path_with_credential="${remote_path}${feed_credential}"
+    local disable_feed_credential="$2"
+
+    remote_path_with_credential="$remote_path"
+    if [ "$disable_feed_credential" = false ]; then
+        remote_path_with_credential+="$feed_credential"
+    fi
+
     wget_options="-q -S --spider --tries 5 --waitretry 2 --connect-timeout 15 "
     wget $wget_options "$remote_path_with_credential" 2>&1 || return 1
     return 0
@@ -763,7 +963,7 @@ download() {
 
         say "Download attempt #$attempts has failed: $http_code $download_error_msg"
         say "Attempt #$((attempts+1)) will start in $((attempts*10)) seconds."
-        sleep $((attempts*20))
+        sleep $((attempts*10))
     done
 
 
@@ -783,6 +983,7 @@ downloadcurl() {
     local remote_path="$1"
     local out_path="${2:-}"
     # Append feed_credential as late as possible before calling curl to avoid logging feed_credential
+    # Avoid passing URI with credentials to functions: note, most of them echoing parameters of invocation in verbose output.
     local remote_path_with_credential="${remote_path}${feed_credential}"
     local curl_options="--retry 20 --retry-delay 2 --connect-timeout 15 -sSL -f --create-dirs "
     local failed=false
@@ -792,7 +993,8 @@ downloadcurl() {
         curl $curl_options -o "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        local response=$(get_http_header_curl $remote_path_with_credential)
+        local disable_feed_credential=false
+        local response=$(get_http_header_curl $remote_path $disable_feed_credential)
         http_code=$( echo "$response" | awk '/^HTTP/{print $2}' | tail -1 )
         download_error_msg="Unable to download $remote_path."
         if  [[ $http_code != 2* ]]; then
@@ -822,7 +1024,8 @@ downloadwget() {
         wget $wget_options -O "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        local response=$(get_http_header_wget $remote_path_with_credential)
+        local disable_feed_credential=false
+        local response=$(get_http_header_wget $remote_path $disable_feed_credential)
         http_code=$( echo "$response" | awk '/^  HTTP/{print $2}' | tail -1 )
         download_error_msg="Unable to download $remote_path."
         if  [[ $http_code != 2* ]]; then
@@ -834,15 +1037,115 @@ downloadwget() {
     return 0
 }
 
+get_download_link_from_aka_ms() {    
+    eval $invocation
+
+    #quality is not supported for LTS or current channel
+    if [[ ! -z "$normalized_quality"  && ("$normalized_channel" == "LTS" || "$normalized_channel" == "current") ]]; then
+        normalized_quality=""
+        say_warning "Specifying quality for current or LTS channel is not supported, the quality will be ignored."
+    fi
+
+    say_verbose "Retrieving primary payload URL from aka.ms for channel: '$normalized_channel', quality: '$normalized_quality', product: '$normalized_product', os: '$normalized_os', architecture: '$normalized_architecture'." 
+
+    #construct aka.ms link
+    aka_ms_link="https://aka.ms/dotnet"
+    if  [ "$internal" = true ]; then
+        aka_ms_link="$aka_ms_link/internal"
+    fi
+    aka_ms_link="$aka_ms_link/$normalized_channel"
+    if [[ ! -z "$normalized_quality" ]]; then
+        aka_ms_link="$aka_ms_link/$normalized_quality"
+    fi
+    aka_ms_link="$aka_ms_link/$normalized_product-$normalized_os-$normalized_architecture.tar.gz"
+    say_verbose "Constructed aka.ms link: '$aka_ms_link'."
+
+    #get HTTP response
+    #do not pass credentials as a part of the $aka_ms_link and do not apply credentials in the get_http_header function
+    #otherwise the redirect link would have credentials as well
+    #it would result in applying credentials twice to the resulting link and thus breaking it, and in echoing credentials to the output as a part of redirect link
+    disable_feed_credential=true
+    response="$(get_http_header $aka_ms_link $disable_feed_credential)"
+
+    say_verbose "Received response: $response"
+    # Get results of all the redirects.
+    http_codes=$( echo "$response" | awk '$1 ~ /^HTTP/ {print $2}' )
+    # They all need to be 301, otherwise some links are broken (except for the last, which is not a redirect but 200 or 404).
+    broken_redirects=$( echo "$http_codes" | sed '$d' | grep -v '301' )
+
+    # All HTTP codes are 301 (Moved Permanently), the redirect link exists.
+    if [[ -z "$broken_redirects" ]]; then
+        aka_ms_download_link=$( echo "$response" | awk '$1 ~ /^Location/{print $2}' | tail -1 | tr -d '\r')
+
+        if [[ -z "$aka_ms_download_link" ]]; then
+            say_verbose "The aka.ms link '$aka_ms_link' is not valid: failed to get redirect location."
+            return 1
+        fi
+
+        say_verbose "The redirect location retrieved: '$aka_ms_download_link'."
+        return 0
+    else
+        say_verbose "The aka.ms link '$aka_ms_link' is not valid: received HTTP code: $(echo "$broken_redirects" | paste -sd "," -)."
+        return 1
+    fi
+}
+
 calculate_vars() {
     eval $invocation
     valid_legacy_download_link=true
 
+    #normalize input variables
     normalized_architecture="$(get_normalized_architecture_from_architecture "$architecture")"
-    say_verbose "normalized_architecture=$normalized_architecture"
+    say_verbose "Normalized architecture: '$normalized_architecture'."
-
     normalized_os="$(get_normalized_os "$user_defined_os")"
-    say_verbose "normalized_os=$normalized_os"
+    say_verbose "Normalized OS: '$normalized_os'."
+    normalized_quality="$(get_normalized_quality "$quality")"
+    say_verbose "Normalized quality: '$normalized_quality'."
+    normalized_channel="$(get_normalized_channel "$channel")"
+    say_verbose "Normalized channel: '$normalized_channel'."
+    normalized_product="$(get_normalized_product "$runtime")"
+    say_verbose "Normalized product: '$normalized_product'."
+
+    #try to get download location from aka.ms link
+    #not applicable when exact version is specified via command or json file
+    normalized_version="$(to_lowercase "$version")"
+    if [[ -z "$json_file" && "$normalized_version" == "latest" ]]; then
+
+            valid_aka_ms_link=true;
+            get_download_link_from_aka_ms || valid_aka_ms_link=false
+            
+            if [ "$valid_aka_ms_link" == false ]; then
+                # if quality is specified - exit with error - there is no fallback approach
+                if [ ! -z "$normalized_quality" ]; then
+                    say_err "Failed to locate the latest version in the channel '$normalized_channel' with '$normalized_quality' quality for '$normalized_product', os: '$normalized_os', architecture: '$normalized_architecture'."
+                    say_err "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support."
+                    return 1
+                fi
+                say_verbose "Falling back to latest.version file approach."
+            else
+                say_verbose "Retrieved primary payload URL from aka.ms link: '$aka_ms_download_link'."
+                download_link=$aka_ms_download_link
+
+                say_verbose "Downloading using legacy url will not be attempted."
+                valid_legacy_download_link=false
+
+                #get version from the path
+                IFS='/'
+                read -ra pathElems <<< "$download_link"
+                count=${#pathElems[@]}
+                specific_version="${pathElems[count-2]}"
+                unset IFS;
+                say_verbose "Version: '$specific_version'."
+
+                #Retrieve product specific version
+                specific_product_version="$(get_specific_product_version "$azure_feed" "$specific_version" "$download_link")"
+                say_verbose "Product specific version: '$specific_product_version'."
+  
+                install_root="$(resolve_installation_path "$install_dir")"
+                say_verbose "InstallRoot: '$install_root'."
+                return 
+            fi
+    fi
 
     specific_version="$(get_specific_version_from_version "$azure_feed" "$channel" "$normalized_architecture" "$version" "$json_file")"
     specific_product_version="$(get_specific_product_version "$azure_feed" "$specific_version")"
@@ -1011,6 +1314,8 @@ feed_credential=""
 verbose=false
 runtime=""
 runtime_id=""
+quality=""
+internal=false
 override_non_versioned_files=true
 non_dynamic_parameters=""
 user_defined_os=""
@@ -1027,6 +1332,14 @@ do
             shift
             version="$1"
             ;;
+        -q|--quality|-[Qq]uality)
+            shift
+            quality="$1"
+            ;;
+        --internal|-[Ii]nternal)
+            internal=true
+            non_dynamic_parameters+=" $name"
+            ;;
         -i|--install-dir|-[Ii]nstall[Dd]ir)
             shift
             install_dir="$1"
@@ -1084,7 +1397,9 @@ do
         --feed-credential|-[Ff]eed[Cc]redential)
             shift
             feed_credential="$1"
-            non_dynamic_parameters+=" $name "\""$1"\"""
+            #feed_credential should start with "?", for it to be added to the end of the link.
+            #adding "?" at the beginning of the feed_credential if needed.
+            [[ -z "$(echo $feed_credential)" ]] || [[ $feed_credential == \?* ]] || feed_credential="?$feed_credential"
             ;;
         --runtime-id|-[Rr]untime[Ii]d)
             shift
@@ -1116,15 +1431,26 @@ do
             echo "          - LTS - most current supported release"
             echo "          - 2-part version in a format A.B - represents a specific release"
             echo "              examples: 2.0; 1.0"
-            echo "          - Branch name"
+            echo "          - 3-part version in a format A.B.Cxx - represents a specific SDK release"
-            echo "              examples: release/2.0.0; Master"
+            echo "              examples: 5.0.1xx, 5.0.2xx."
-            echo "          Note: The version parameter overrides the channel parameter."
+            echo "              Supported since 5.0 release"
+            echo "          Note: The version parameter overrides the channel parameter when any version other than `latest` is used."
             echo "  -v,--version <VERSION>         Use specific VERSION, Defaults to \`$version\`."
             echo "      -Version"
             echo "          Possible values:"
             echo "          - latest - most latest build on specific channel"
             echo "          - 3-part version in a format A.B.C - represents specific version of build"
             echo "              examples: 2.0.0-preview2-006120; 1.1.0"
+            echo "  -q,--quality <quality>         Download the latest build of specified quality in the channel."
+            echo "      -Quality"
+            echo "          The possible values are: daily, signed, validated, preview, GA."
+            echo "          Works only in combination with channel. Not applicable for current and LTS channels and will be ignored if those channels are used." 
+            echo "          For SDK use channel in A.B.Cxx format. Using quality for SDK together with channel in A.B format is not supported." 
+            echo "          Supported since 5.0 release." 
+            echo "          Note: The version parameter overrides the channel parameter when any version other than `latest` is used, and therefore overrides the quality."
+            echo "  --internal,-Internal               Download internal builds. Requires providing credentials via --feed-credential parameter."
+            echo "  --feed-credential <FEEDCREDENTIAL> Token to access Azure feed. Used as a query string to append to the Azure feed."
+            echo "      -FeedCredential                This parameter typically is not specified."
             echo "  -i,--install-dir <DIR>             Install under specified location (see Install Location below)"
             echo "      -InstallDir"
             echo "  --architecture <ARCHITECTURE>      Architecture of dotnet binaries to be installed, Defaults to \`$architecture\`."
@@ -1145,7 +1471,6 @@ do
             echo "  --verbose,-Verbose                 Display diagnostics information."
             echo "  --azure-feed,-AzureFeed            Azure feed location. Defaults to $azure_feed, This parameter typically is not changed by the user."
             echo "  --uncached-feed,-UncachedFeed      Uncached feed location. This parameter typically is not changed by the user."
-            echo "  --feed-credential,-FeedCredential  Azure feed shared access token. This parameter typically is not specified."
             echo "  --skip-non-versioned-files         Skips non-versioned files if they already exist, such as the dotnet executable."
             echo "      -SkipNonVersionedFiles"
             echo "  --no-cdn,-NoCdn                    Disable downloading from the Azure CDN, and use the uncached feed directly."
@@ -1186,23 +1511,44 @@ say "- The SDK needs to be installed without user interaction and without admin
 say "- The SDK installation doesn't need to persist across multiple CI runs."
 say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.\n"
 
+if [ "$internal" = true ] && [ -z "$(echo $feed_credential)" ]; then
+    message="Provide credentials via --feed-credential parameter."
+    if [ "$dry_run" = true ]; then
+        say_warning "$message"
+    else
+        say_err "$message"
+        exit 1
+    fi
+fi
+
 check_min_reqs
 calculate_vars
 script_name=$(basename "$0")
 
 if [ "$dry_run" = true ]; then
     say "Payload URLs:"
-    say "Primary named payload URL: $download_link"
+    say "Primary named payload URL: ${download_link}"
     if [ "$valid_legacy_download_link" = true ]; then
-        say "Legacy named payload URL: $legacy_download_link"
+        say "Legacy named payload URL: ${legacy_download_link}"
     fi
     repeatable_command="./$script_name --version "\""$specific_version"\"" --install-dir "\""$install_root"\"" --architecture "\""$normalized_architecture"\"" --os "\""$normalized_os"\"""
+    
+    if [ ! -z "$normalized_quality" ]; then
+        repeatable_command+=" --quality "\""$normalized_quality"\"""
+    fi
+
     if [[ "$runtime" == "dotnet" ]]; then
         repeatable_command+=" --runtime "\""dotnet"\"""
     elif [[ "$runtime" == "aspnetcore" ]]; then
         repeatable_command+=" --runtime "\""aspnetcore"\"""
     fi
+
     repeatable_command+="$non_dynamic_parameters"
+
+    if [ -n "$feed_credential" ]; then
+        repeatable_command+=" --feed-credential "\""<feed_credential>"\"""
+    fi
+
     say "Repeatable invocation: $repeatable_command"
     exit 0
 fi
@@ -1219,4 +1565,4 @@ fi
 
 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, select your operating system and check the \"Dependencies\" section."
-say "Installation finished successfully."
+say "Installation finished successfully."