Merge pull request #1367 from dotnet/prkrishn/dotnet-install

* Add support for specifying a version in obtain/install

scripts/obtain/install.ps1

@@ -3,15 +3,21 @@
 # Licensed under the MIT license. See LICENSE file in the project root for full license information.
 #
 
-param([string]$Channel="dev")
-
+param(
+   [string]$Channel="dev",
+   [string]$version="Latest"
+)
 
 $ErrorActionPreference="Stop"
 $ProgressPreference="SilentlyContinue"
 
+$fileVersion = $Version
+if ($fileVersion -eq "Latest") {
+    $fileVersion = "latest"
+}
 $Feed="https://dotnetcli.blob.core.windows.net/dotnet"
-$DotNetFileName="dotnet-win-x64.latest.zip"
-$DotNetUrl="$Feed/$Channel/Binaries/Latest"
+$DotNetFileName="dotnet-win-x64.$fileVersion.zip"
+$DotNetUrl="$Feed/$Channel/Binaries/$Version"
 
 function say($str)
 {
@@ -34,21 +40,29 @@ if (Test-Path $LocalFile)
     $LocalVersion = $LocalData[1].Trim()
     if ($LocalVersion -and $LocalHash)
     {
-        $RemoteResponse = Invoke-WebRequest -UseBasicParsing "$Feed/$Channel/dnvm/latest.win.version"
-        $RemoteData = @([Text.Encoding]::UTF8.GetString($RemoteResponse.Content).Split([char[]]@(), [StringSplitOptions]::RemoveEmptyEntries));
-        $RemoteHash = $RemoteData[0].Trim()
-        $RemoteVersion = $RemoteData[1].Trim()
-
-        if (!$RemoteVersion -or !$RemoteHash) {
-            throw "Invalid response from feed"
-        }
-
-        say "Latest version: $RemoteVersion"
-        say "Local Version: $LocalVersion"
-
-        if($LocalHash -eq $RemoteHash)
+        if ($Version -eq "Latest")
         {
-            say "You already have the latest version"
+            $RemoteResponse = Invoke-WebRequest -UseBasicParsing "$Feed/$Channel/dnvm/latest.win.version"
+            $RemoteData = @([Text.Encoding]::UTF8.GetString($RemoteResponse.Content).Split([char[]]@(), [StringSplitOptions]::RemoveEmptyEntries));
+            $RemoteHash = $RemoteData[0].Trim()
+            $RemoteVersion = $RemoteData[1].Trim()
+
+            if (!$RemoteVersion -or !$RemoteHash) {
+                throw "Invalid response from feed"
+            }
+
+            say "Latest version: $RemoteVersion"
+            say "Local Version: $LocalVersion"
+
+            if($LocalHash -eq $RemoteHash)
+            {
+                say "You already have the latest version"
+                exit 0
+            }
+        }
+        elseif ($LocalVersion -eq $Version)
+        {
+            say "$Version is already installed."
             exit 0
         }
     }

scripts/obtain/install.sh

@@ -1,5 +1,3 @@
-#!/usr/bin/env sh
-#
 # Copyright (c) .NET Foundation and contributors. All rights reserved.
 # Licensed under the MIT license. See LICENSE file in the project root for full license information.
 #
@@ -162,10 +160,17 @@ install_dotnet()
         say_err "Ending install due to missing pre-reqs"
         return 1;
     fi
+
+    if [ "$VERSION" == "Latest" ]; then
+      local fileVersion=latest
+    else
+      local fileVersion=$VERSION
+    fi
+
     local os=$(current_os)
     local installLocation="$PREFIX/share/dotnet"
-    local dotnet_url="https://dotnetcli.blob.core.windows.net/dotnet/$CHANNEL/Binaries/Latest"
-    local dotnet_filename="dotnet-$os-x64.latest.tar.gz"
+    local dotnet_url="https://dotnetcli.blob.core.windows.net/dotnet/$CHANNEL/Binaries/$VERSION"
+    local dotnet_filename="dotnet-$os-x64.$fileVersion.tar.gz"
 
     if [ "$RELINK" = "0" ]; then
         if [ "$FORCE" = "0" ]; then
@@ -246,6 +251,10 @@ do
             shift
             CHANNEL=$1
             ;;
+        -v|--version)
+            shift
+            VERSION=$1
+            ;;
         -d|--destination)
             shift
             DOTNET_INSTALL_DIR=$1
@@ -288,5 +297,6 @@ elif [ -z "$PREFIX" ]; then
 fi
 
 [ -z "$CHANNEL" ] && CHANNEL="dev"
+[ -z "$VERSION" ] && VERSION="Latest"
 
 install_dotnet