Install sxs with the install-dotnet scripts (#124)

* Use dotnet-install scripts for proper sxs * Update dotnet version in testing * Error message cleanup * SxS testing in the dotnet project * Update package lock * Test fixes * Use proper environment variable * Set dotnet root for windows
2025-10-31 23:33:45 +00:00 · 2020-09-15 09:36:09 -07:00 · 2020-09-15 09:36:09 -07:00 · 352338157c
commit 352338157c
parent 3569a93d9f
16 changed files with 775 additions and 1816 deletions
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@ -11,6 +11,7 @@ jobs:
  build:
    runs-on: ${{ matrix.operating-system }}
    strategy:
+      fail-fast: false
      matrix:
        operating-system: [ubuntu-latest, windows-latest, macOS-latest]
    steps:
@ -19,7 +20,7 @@ jobs:
    - name: Set Node.js 12
      uses: actions/setup-node@v1
      with:
-        version: 12.x
+        node-version: 12.x
    - run: npm ci
    - run: npm run build
    - run: npm run format-check
@ -31,27 +32,50 @@ jobs:
  test:
    runs-on: ${{ matrix.operating-system }}
    strategy:
+      fail-fast: false
      matrix:
        operating-system: [ubuntu-latest, windows-latest, macOS-latest]
    steps:
      - name: Checkout
        uses: actions/checkout@v2
-      - name: Clear tool cache
-        run: mv "${{ runner.tool_cache }}" "${{ runner.tool_cache }}.old"
-      - name: Setup dotnet 3.0.100
+      - name: Clear tool cache (macOS)
+        if: runner.os == 'macos'
+        run: |
+          echo $PATH
+          dotnet --info
+          rm -rf "/Users/runner/.dotnet"
+      - name: Clear tool cache (Ubuntu)
+        if: runner.os == 'linux'
+        run: |
+          echo $PATH
+          dotnet --info
+          rm -rf "/usr/share/dotnet"
+      - name: Clear tool cache (Windows)
+        if: runner.os == 'windows'
+        run: |
+          echo $env:PATH
+          dotnet --info
+          Remove-Item $env:LocalAppData\Microsoft\dotnet/*  -Recurse -Force -ErrorAction SilentlyContinue
+          Remove-Item "$env:ProgramFiles\dotnet/*"  -Recurse -Force -ErrorAction SilentlyContinue
+      # Side-by-side install of 2.2 and 3.1 used for the test project
+      - name: Setup dotnet 2.2.402
        uses: ./
        with:
-          dotnet-version: 3.0.100
+          dotnet-version: 2.2.402
+      - name: Setup dotnet 3.1.201
+        uses: ./
+        with:
+          dotnet-version: 3.1.201
          # We are including this veriable to force the generation of the nuget config file to verify that it is created in the correct place
          source-url: https://api.nuget.org/v3/index.json
        env:
          NUGET_AUTH_TOKEN: NOTATOKEN
      - name: Verify dotnet
        if: runner.os != 'windows'
-        run: __tests__/verify-dotnet.sh 3.0.100
+        run: __tests__/verify-dotnet.sh 3.1.201 2.2.402
      - name: Verify dotnet (Windows)
        if: runner.os == 'windows'
-        run: __tests__/verify-dotnet.ps1 3.0.100
+        run: __tests__/verify-dotnet.ps1 3.1.201

  test-proxy:
    runs-on: ubuntu-latest
@ -65,37 +89,42 @@ jobs:
          - 3128:3128
    env:
      https_proxy: http://squid-proxy:3128
+      http_proxy: http://squid-proxy:3128
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Clear tool cache
-        run: rm -rf $RUNNER_TOOL_CACHE/*
-      - name: Setup dotnet 3.0.100
+        run: rm -rf "/usr/share/dotnet"
+      - name: Install curl
+        run: |
+          apt update
+          apt -y install curl
+      - name: Setup dotnet 3.1.201
        uses: ./
        with:
-          dotnet-version: 3.0.100
+          dotnet-version: 3.1.201
          source-url: https://api.nuget.org/v3/index.json
        env:
          NUGET_AUTH_TOKEN: NOTATOKEN
      - name: Verify dotnet
-        run: __tests__/verify-dotnet.sh 3.0.100
+        run: __tests__/verify-dotnet.sh 3.1.201

  test-bypass-proxy:
    runs-on: ubuntu-latest
    env:
      https_proxy: http://no-such-proxy:3128
-      no_proxy: github.com,dotnetcli.blob.core.windows.net,download.visualstudio.microsoft.com,api.nuget.org
+      no_proxy: github.com,dotnetcli.blob.core.windows.net,download.visualstudio.microsoft.com,api.nuget.org,dotnetcli.azureedge.net
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Clear tool cache
-        run: mv "${{ runner.tool_cache }}" "${{ runner.tool_cache }}.old"
-      - name: Setup dotnet 3.0.100
+        run: rm -rf "/usr/share/dotnet"
+      - name: Setup dotnet 3.1.201
        uses: ./
        with:
-          dotnet-version: 3.0.100
+          dotnet-version: 3.1.201
          source-url: https://api.nuget.org/v3/index.json
        env:
          NUGET_AUTH_TOKEN: NOTATOKEN
      - name: Verify dotnet
-        run: __tests__/verify-dotnet.sh 3.0.100
+        run: __tests__/verify-dotnet.sh 3.1.201
--- a/.gitignore
+++ b/.gitignore
@ -95,4 +95,5 @@ typings/
 # DynamoDB Local files
 .dynamodb/

-.vscode/*
+# Ignore .vscode files
+.vscode/
--- a/tests/authutil.test.ts
+++ b/tests/authutil.test.ts
@ -81,7 +81,11 @@ describe('authutil tests', () => {
  beforeEach(async () => {
    await io.rmRF(fakeSourcesDirForTesting);
    await io.mkdirP(fakeSourcesDirForTesting);
-  }, 100000);
+  }, 30000);
+
+  afterAll(async () => {
+    await io.rmRF(fakeSourcesDirForTesting);
+  }, 30000);

  beforeEach(() => {
    if (fs.existsSync(nugetConfigFile)) {
--- a/tests/installer.test.ts
+++ b/tests/installer.test.ts
@ -73,6 +73,9 @@ describe('version tests', () => {

 describe('installer tests', () => {
  beforeAll(async () => {
+    process.env.RUNNER_TOOL_CACHE = toolDir;
+    process.env.DOTNET_INSTALL_DIR = toolDir;
+    process.env.RUNNER_TEMP = tempDir;
    await io.rmRF(toolDir);
    await io.rmRF(tempDir);
  });
@ -84,23 +87,21 @@ describe('installer tests', () => {
    } catch {
      console.log('Failed to remove test directories');
    }
-  }, 100000);
+  }, 30000);

  it('Resolving a normal generic version works', async () => {
    const dotnetInstaller = new installer.DotnetCoreInstaller('3.1.x');
-    let versInfo = await dotnetInstaller.resolveInfos(
-      ['win-x64'],
+    let versInfo = await dotnetInstaller.resolveVersion(
      new installer.DotNetVersionInfo('3.1.x')
    );

-    expect(versInfo.resolvedVersion.startsWith('3.1.'));
+    expect(versInfo.startsWith('3.1.'));
  }, 100000);

  it('Resolving a nonexistent generic version fails', async () => {
    const dotnetInstaller = new installer.DotnetCoreInstaller('999.1.x');
    try {
-      await dotnetInstaller.resolveInfos(
-        ['win-x64'],
+      await dotnetInstaller.resolveVersion(
        new installer.DotNetVersionInfo('999.1.x')
      );
      fail();
@ -111,53 +112,47 @@ describe('installer tests', () => {

  it('Resolving a exact stable version works', async () => {
    const dotnetInstaller = new installer.DotnetCoreInstaller('3.1.201');
-    let versInfo = await dotnetInstaller.resolveInfos(
-      ['win-x64'],
+    let versInfo = await dotnetInstaller.resolveVersion(
      new installer.DotNetVersionInfo('3.1.201')
    );

-    expect(versInfo.resolvedVersion).toBe('3.1.201');
+    expect(versInfo).toBe('3.1.201');
  }, 100000);

  it('Resolving a exact preview version works', async () => {
    const dotnetInstaller = new installer.DotnetCoreInstaller(
-      '5.0.0-preview.4'
+      '5.0.0-preview.6'
    );
-    let versInfo = await dotnetInstaller.resolveInfos(
-      ['win-x64'],
-      new installer.DotNetVersionInfo('5.0.0-preview.4')
+    let versInfo = await dotnetInstaller.resolveVersion(
+      new installer.DotNetVersionInfo('5.0.0-preview.6')
    );

-    expect(versInfo.resolvedVersion).toBe('5.0.0-preview.4');
+    expect(versInfo).toBe('5.0.0-preview.6');
  }, 100000);

  it('Acquires version of dotnet if no matching version is installed', async () => {
-    await getDotnet('2.2.205');
-    const dotnetDir = path.join(toolDir, 'dncs', '2.2.205', os.arch());
-
-    expect(fs.existsSync(`${dotnetDir}.complete`)).toBe(true);
+    await getDotnet('3.1.201');
+    expect(fs.existsSync(path.join(toolDir, 'sdk', '3.1.201'))).toBe(true);
    if (IS_WINDOWS) {
-      expect(fs.existsSync(path.join(dotnetDir, 'dotnet.exe'))).toBe(true);
+      expect(fs.existsSync(path.join(toolDir, 'dotnet.exe'))).toBe(true);
    } else {
-      expect(fs.existsSync(path.join(dotnetDir, 'dotnet'))).toBe(true);
+      expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
    }
  }, 400000); //This needs some time to download on "slower" internet connections

-  it('Acquires version of dotnet if no matching version is installed', async () => {
-    const dotnetDir = path.join(toolDir, 'dncs', '2.2.105', os.arch());
-
+  it('Acquires version of dotnet from global.json if no matching version is installed', async () => {
    const globalJsonPath = path.join(process.cwd(), 'global.json');
-    const jsonContents = `{${os.EOL}"sdk": {${os.EOL}"version": "2.2.105"${os.EOL}}${os.EOL}}`;
+    const jsonContents = `{${os.EOL}"sdk": {${os.EOL}"version": "3.1.201"${os.EOL}}${os.EOL}}`;
    if (!fs.existsSync(globalJsonPath)) {
      fs.writeFileSync(globalJsonPath, jsonContents);
    }
    await setup.run();

-    expect(fs.existsSync(`${dotnetDir}.complete`)).toBe(true);
+    expect(fs.existsSync(path.join(toolDir, 'sdk', '3.1.201'))).toBe(true);
    if (IS_WINDOWS) {
-      expect(fs.existsSync(path.join(dotnetDir, 'dotnet.exe'))).toBe(true);
+      expect(fs.existsSync(path.join(toolDir, 'dotnet.exe'))).toBe(true);
    } else {
-      expect(fs.existsSync(path.join(dotnetDir, 'dotnet'))).toBe(true);
+      expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
    }
    fs.unlinkSync(globalJsonPath);
  }, 100000);
@ -170,30 +165,7 @@ describe('installer tests', () => {
      thrown = true;
    }
    expect(thrown).toBe(true);
-  }, 100000);
-
-  it('Uses version of dotnet installed in cache', async () => {
-    const dotnetDir: string = path.join(toolDir, 'dncs', '250.0.0', os.arch());
-    await io.mkdirP(dotnetDir);
-    fs.writeFileSync(`${dotnetDir}.complete`, 'hello');
-    // This will throw if it doesn't find it in the cache (because no such version exists)
-    await getDotnet('250.0.0');
-    return;
-  });
-
-  it('Doesnt use version of dotnet that was only partially installed in cache', async () => {
-    const dotnetDir: string = path.join(toolDir, 'dncs', '251.0.0', os.arch());
-    await io.mkdirP(dotnetDir);
-    let thrown = false;
-    try {
-      // This will throw if it doesn't find it in the cache (because no such version exists)
-      await getDotnet('251.0.0');
-    } catch {
-      thrown = true;
-    }
-    expect(thrown).toBe(true);
-    return;
-  });
+  }, 30000);

  it('Uses an up to date bash download script', async () => {
    const httpCallbackClient = new hc.HttpClient('setup-dotnet-test', [], {
@ -213,7 +185,7 @@ describe('installer tests', () => {
    expect(normalizeFileContents(currentContents)).toBe(
      normalizeFileContents(upToDateContents)
    );
-  }, 100000);
+  }, 30000);

  it('Uses an up to date powershell download script', async () => {
    var httpCallbackClient = new hc.HttpClient('setup-dotnet-test', [], {
@ -233,7 +205,7 @@ describe('installer tests', () => {
    expect(normalizeFileContents(currentContents)).toBe(
      normalizeFileContents(upToDateContents)
    );
-  }, 100000);
+  }, 30000);
 });

 function normalizeFileContents(contents: string): string {
--- a/tests/sample-csproj/Program.cs
+++ b/tests/sample-csproj/Program.cs
@ -1,14 +1,15 @@
-using System;
-using Newtonsoft.Json;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;

 namespace sample_csproj
 {
-    class Program
+    [TestClass]
+    public class Program
    {
-        static void Main(string[] args)
+        [TestMethod]
+        public void TestMethod1()
        {
-            var json = JsonConvert.SerializeObject(new[] {"Hello", "World!" });
-            Console.WriteLine(json);
+            Console.WriteLine("Hello, World!");
        }
    }
 }
--- a/tests/sample-csproj/runtimeconfig.template.json
+++ b/tests/sample-csproj/runtimeconfig.template.json
@ -1,7 +0,0 @@
-{
-  "runtimeOptions": {
-    "configProperties": {
-      "System.Globalization.Invariant": true
-    }
-  }
-}
--- a/tests/sample-csproj/sample.csproj
+++ b/tests/sample-csproj/sample.csproj
@ -1,13 +1,18 @@
 <Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFrameworks>netcoreapp3.1;netcoreapp2.2</TargetFrameworks>
    <RootNamespace>sample_csproj</RootNamespace>
+
+    <IsPackable>false</IsPackable>
  </PropertyGroup>

  <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+    <!-- These packages will be downloaded over the network for testing proxy settings -->
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.1.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.0" />
+    <PackageReference Include="coverlet.collector" Version="1.2.0" />
  </ItemGroup>

 </Project>
--- a/tests/setup-dotnet.test.ts
+++ b/tests/setup-dotnet.test.ts
@ -0,0 +1,48 @@
+import io = require('@actions/io');
+import fs = require('fs');
+import os = require('os');
+import path = require('path');
+
+const toolDir = path.join(__dirname, 'runner', 'tools2');
+const tempDir = path.join(__dirname, 'runner', 'temp2');
+
+import * as setup from '../src/setup-dotnet';
+
+const IS_WINDOWS = process.platform === 'win32';
+
+describe('setup-dotnet tests', () => {
+  beforeAll(async () => {
+    process.env.RUNNER_TOOL_CACHE = toolDir;
+    process.env.DOTNET_INSTALL_DIR = toolDir;
+    process.env.RUNNER_TEMP = tempDir;
+    await io.rmRF(toolDir);
+    await io.rmRF(tempDir);
+  });
+
+  afterAll(async () => {
+    try {
+      await io.rmRF(path.join(process.cwd(), 'global.json'));
+      await io.rmRF(toolDir);
+      await io.rmRF(tempDir);
+    } catch {
+      console.log('Failed to remove test directories');
+    }
+  }, 30000);
+
+  it('Acquires version of dotnet if no matching version is installed', async () => {
+    const globalJsonPath = path.join(process.cwd(), 'global.json');
+    const jsonContents = `{${os.EOL}"sdk": {${os.EOL}"version": "3.1.201"${os.EOL}}${os.EOL}}`;
+    if (!fs.existsSync(globalJsonPath)) {
+      fs.writeFileSync(globalJsonPath, jsonContents);
+    }
+    await setup.run();
+
+    expect(fs.existsSync(path.join(toolDir, 'sdk', '3.1.201'))).toBe(true);
+    if (IS_WINDOWS) {
+      expect(fs.existsSync(path.join(toolDir, 'dotnet.exe'))).toBe(true);
+    } else {
+      expect(fs.existsSync(path.join(toolDir, 'dotnet'))).toBe(true);
+    }
+    fs.unlinkSync(globalJsonPath);
+  }, 100000);
+});
--- a/tests/verify-dotnet.ps1
+++ b/tests/verify-dotnet.ps1
@ -13,13 +13,23 @@ Write-Host "Found '$dotnet'"

 $version = & $dotnet --version | Out-String | ForEach-Object { $_.Trim() }
 Write-Host "Version $version"
-# if ($version -ne $args[0])
-# {
-#   Write-Host "PATH='$env:path'"
-#   Write-Host "gcm dotnet:"
-#   gcm dotnet | fl
-#   throw "Unexpected version"
-# }
+if ($version -ne $args[0])
+{
+  Write-Host "PATH='$env:path'"
+  throw "Unexpected version"
+}
+
+if ($args[1])
+{
+  # SDKs are listed on multiple lines with the path afterwards in square brackets
+  $version = & $dotnet --list-sdks | ForEach-Object { $_.SubString(0, $_.IndexOf('[')).Trim() }
+  Write-Host "Version $version"
+  if (-not ($version -contains $args[1]))
+  {
+    Write-Host "PATH='$env:path'"
+    throw "Unexpected version"
+  }
+}

 Write-Host "Building sample csproj"
 & $dotnet build __tests__/sample-csproj/ --no-cache
@ -29,9 +39,20 @@ if ($LASTEXITCODE -ne 0)
 }

 Write-Host "Testing compiled app"
-$sample_output = "$(__tests__/sample-csproj/bin/Debug/netcoreapp3.0/sample.exe)".Trim()
+$sample_output = "$(dotnet test __tests__/sample-csproj/ --no-build)"
 Write-Host "Sample output: $sample_output"
-if ($sample_output -notlike "*Hello*World*")
+# For Side-by-Side installs we want to run the tests twice, for a single install the tests will run once
+if ($args[1])
 {
-  throw "Unexpected output"
+  if ($sample_output -notlike "*Test Run Successful.*Test Run Successful.*")
+  {
+    throw "Unexpected output"
+  }
+}
+else
+{
+  if ($sample_output -notlike "*Test Run Successful.*")
+  {
+    throw "Unexpected output"
+  }
 }
--- a/tests/verify-dotnet.sh
+++ b/tests/verify-dotnet.sh
@ -15,13 +15,30 @@ if [ -z "$(echo $dotnet_version | grep $1)" ]; then
  exit 1
 fi

+if [ -n "$2" ]; then
+  dotnet_version="$(dotnet --list-sdks)"
+  echo "Found dotnet version '$dotnet_version'"
+  if [ -z "$(echo $dotnet_version | grep $2)" ]; then
+    echo "Unexpected version"
+    exit 1
+  fi
+fi
+
 echo "Building sample csproj"
 dotnet build __tests__/sample-csproj/ --no-cache || exit 1

 echo "Testing compiled app"
-sample_output="$(__tests__/sample-csproj/bin/Debug/netcoreapp3.0/sample)"
+sample_output=$(dotnet test __tests__/sample-csproj/ --no-build)
 echo "Sample output: $sample_output"
-if [ -z "$(echo $sample_output | grep Hello)" ]; then
-  echo "Unexpected output"
-  exit 1
+# For Side-by-Side installs we want to run the tests twice, for a single install the tests will run once
+if [ -n "$2" ]; then
+  if [ -z "$(echo $sample_output | grep "Test Run Successful.*Test Run Successful.")" ]; then
+    echo "Unexpected output"
+    exit 1
+  fi
+else
+  if [ -z "$(echo $sample_output | grep "Test Run Successful.")" ]; then
+    echo "Unexpected output"
+    exit 1
+  fi
 fi
--- a/dist/index.js
+++ b/dist/index.js
--- a/externals/get-os-distro.sh
+++ b/externals/get-os-distro.sh
@ -1,192 +0,0 @@
-#!/usr/bin/env bash
-# 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.
-#
-
-# Stop script on NZEC
-set -e
-# Stop script if unbound variable found (use ${var:-} if intentional)
-set -u
-# By default cmd1 | cmd2 returns exit code of cmd2 regardless of cmd1 success
-# This is causing it to fail
-set -o pipefail
-
-# Use in the the functions: eval $invocation
-invocation='say_verbose "Calling: ${yellow:-}${FUNCNAME[0]} ${green:-}$*${normal:-}"'
-
-# standard output may be used as a return value in the functions
-# we need a way to write text on the screen in the functions so that
-# it won't interfere with the return value.
-# Exposing stream 3 as a pipe to standard output of the script itself
-exec 3>&1
-
-say_err() {
-    printf "%b\n" "get-os-distro: Error: $1" >&2
-}
-
-# This platform list is finite - if the SDK/Runtime has supported Linux distribution-specific assets,
-#   then and only then should the Linux distribution appear in this list.
-# Adding a Linux distribution to this list does not imply distribution-specific support.
-get_legacy_os_name_from_platform() {
-
-    platform="$1"
-    case "$platform" in
-        "centos.7")
-            echo "centos"
-            return 0
-            ;;
-        "debian.8")
-            echo "debian"
-            return 0
-            ;;
-        "fedora.23")
-            echo "fedora.23"
-            return 0
-            ;;
-        "fedora.27")
-            echo "fedora.27"
-            return 0
-            ;;
-        "fedora.24")
-            echo "fedora.24"
-            return 0
-            ;;
-        "opensuse.13.2")
-            echo "opensuse.13.2"
-            return 0
-            ;;
-        "opensuse.42.1")
-            echo "opensuse.42.1"
-            return 0
-            ;;
-        "opensuse.42.3")
-            echo "opensuse.42.3"
-            return 0
-            ;;
-        "rhel.7"*)
-            echo "rhel"
-            return 0
-            ;;
-        "ubuntu.14.04")
-            echo "ubuntu"
-            return 0
-            ;;
-        "ubuntu.16.04")
-            echo "ubuntu.16.04"
-            return 0
-            ;;
-        "ubuntu.16.10")
-            echo "ubuntu.16.10"
-            return 0
-            ;;
-        "ubuntu.18.04")
-            echo "ubuntu.18.04"
-            return 0
-            ;;
-        "alpine.3.4.3")
-            echo "alpine"
-            return 0
-            ;;
-    esac
-    return 1
-}
-
-get_linux_platform_name() {
-
-    if [ -e /etc/os-release ]; then
-        . /etc/os-release
-        echo "$ID.$VERSION_ID"
-        return 0
-    elif [ -e /etc/redhat-release ]; then
-        local redhatRelease=$(</etc/redhat-release)
-        if [[ $redhatRelease == "CentOS release 6."* || $redhatRelease == "Red Hat Enterprise Linux Server release 6."* ]]; then
-            echo "rhel.6"
-            return 0
-        fi
-    fi
-
-    say_err "Linux specific platform name and version could not be detected: UName = $uname"
-    return 1
-}
-
-get_current_os_name() {
-
-    local uname=$(uname)
-    if [ "$uname" = "Darwin" ]; then
-        echo "osx"
-        return 0
-    elif [ "$uname" = "Linux" ]; then
-        local linux_platform_name
-        linux_platform_name="$(get_linux_platform_name)" || { echo "linux" && return 0 ; }
-
-        if [[ $linux_platform_name == "rhel.6" ]]; then
-            echo "$linux_platform_name"
-            return 0
-        elif [[ $linux_platform_name == alpine* ]]; then
-            echo "linux-musl"
-            return 0
-        else
-            echo "linux"
-            return 0
-        fi
-    fi
-
-    say_err "OS name could not be detected: UName = $uname"
-    return 1
-}
-
-get_legacy_os_name() {
-
-    local uname=$(uname)
-    if [ "$uname" = "Darwin" ]; then
-        echo "osx"
-        return 0
-    else
-        if [ -e /etc/os-release ]; then
-            . /etc/os-release
-            os=$(get_legacy_os_name_from_platform "$ID.$VERSION_ID" || echo "")
-            if [ -n "$os" ]; then
-                echo "$os"
-                return 0
-            fi
-        fi
-    fi
-
-    say_err "Distribution specific OS name and version could not be detected: UName = $uname"
-    return 1
-}
-
-get_machine_architecture() {
-
-    if command -v uname > /dev/null; then
-        CPUName=$(uname -m)
-        case $CPUName in
-        armv7l)
-            echo "arm"
-            return 0
-            ;;
-        aarch64)
-            echo "arm64"
-            return 0
-            ;;
-        esac
-    fi
-
-    # Always default to 'x64'
-    echo "x64"
-    return 0
-}
-
-osName=$(get_current_os_name || echo "")
-legacyOsName=$(get_legacy_os_name || echo "")
-arch=$(get_machine_architecture || echo "")
-
-primaryName="$osName-$arch"
-legacyName="$legacyOsName"
-
-echo "Primary:$primaryName"
-echo "Legacy:$legacyName"
-
-if [ -z "$osName" ] && [ -z "$legacyOsName" ];then
-    exit 1
-fi
--- a/externals/get-os-platform.ps1
+++ b/externals/get-os-platform.ps1
@ -1,18 +0,0 @@
-function Get-Machine-Architecture()
-{
-    # possible values: AMD64, IA64, x86
-    return $ENV:PROCESSOR_ARCHITECTURE
-}
-
-function Get-CLIArchitecture-From-Architecture([string]$Architecture)
-{
-    switch ($Architecture.ToLower())
-    {
-        { ($_ -eq "amd64") -or ($_ -eq "x64") } { return "x64" }
-        { $_ -eq "x86" } { return "x86" }
-        default { throw "Architecture not supported. If you think this is a bug, please report it at https://github.com/dotnet/cli/issues" }
-    }
-}
-
-$CLIArchitecture = Get-CLIArchitecture-From-Architecture $(Get-Machine-Architecture)
-Write-Output "Primary:win-$CLIArchitecture"
--- a/package-lock.json
+++ b/package-lock.json
@ -32,6 +32,13 @@
      "integrity": "sha512-G4JjJ6f9Hb3Zvejj+ewLLKLf99ZC+9v+yCxoYf9vSyH+WkzPLB2LuUtRMGNkooMqdugGBFStIKXOuvH1W+EctA==",
      "requires": {
        "tunnel": "0.0.6"
+      },
+      "dependencies": {
+        "tunnel": {
+          "version": "0.0.6",
+          "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
+          "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg=="
+        }
      }
    },
    "@actions/io": {
@ -39,19 +46,6 @@
      "resolved": "https://registry.npmjs.org/@actions/io/-/io-1.0.2.tgz",
      "integrity": "sha512-J8KuFqVPr3p6U8W93DOXlXW6zFvrQAJANdS+vw0YhusLIq+bszW8zmK2Fh1C2kDPX8FMvwIl1OUcFgvJoXLbAg=="
    },
-    "@actions/tool-cache": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/@actions/tool-cache/-/tool-cache-1.3.1.tgz",
-      "integrity": "sha512-sKoEJv0/c7WzjPEq2PO12Sc8QdEp58XIBHMm3c4lUn/iZWgLz9HBeCuFGpLQjDvXJNfLZ4g+WD+rMjgOmpH4Ag==",
-      "requires": {
-        "@actions/core": "^1.2.0",
-        "@actions/exec": "^1.0.0",
-        "@actions/http-client": "^1.0.3",
-        "@actions/io": "^1.0.1",
-        "semver": "^6.1.0",
-        "uuid": "^3.3.2"
-      }
-    },
    "@babel/code-frame": {
      "version": "7.8.3",
      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
@ -478,6 +472,14 @@
        "jest-message-util": "^26.0.1",
        "jest-util": "^26.0.1",
        "slash": "^3.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "@jest/core": {
@ -513,6 +515,14 @@
        "rimraf": "^3.0.0",
        "slash": "^3.0.0",
        "strip-ansi": "^6.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "@jest/environment": {
@ -581,6 +591,14 @@
        "string-length": "^4.0.1",
        "terminal-link": "^2.0.0",
        "v8-to-istanbul": "^4.1.3"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "@jest/source-map": {
@ -640,6 +658,14 @@
        "slash": "^3.0.0",
        "source-map": "^0.6.1",
        "write-file-atomic": "^3.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "@jest/types": {
@ -964,9 +990,9 @@
      "dev": true
    },
    "@types/semver": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-6.0.1.tgz",
-      "integrity": "sha512-ffCdcrEE5h8DqVxinQjo+2d1q+FV5z7iNtPofw3JsrltSoSVlOGaW0rY8XxtO9XukdTn8TaCGWmk2VFGhI70mg==",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-6.2.1.tgz",
+      "integrity": "sha512-+beqKQOh9PYxuHvijhVl+tIHvT6tuwOrE9m14zd+MT2A38KoKZhh7pYJ0SNleLtwDsiIxHDsIk9bv01oOxvSvA==",
      "dev": true
    },
    "@types/stack-utils": {
@ -1176,6 +1202,14 @@
        "chalk": "^4.0.0",
        "graceful-fs": "^4.2.4",
        "slash": "^3.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "babel-plugin-istanbul": {
@ -2304,6 +2338,14 @@
        "please-upgrade-node": "^3.2.0",
        "slash": "^3.0.0",
        "which-pm-runs": "^1.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "iconv-lite": {
@ -2938,6 +2980,14 @@
        "micromatch": "^4.0.2",
        "slash": "^3.0.0",
        "stack-utils": "^2.0.2"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "jest-mock": {
@ -2975,6 +3025,14 @@
        "read-pkg-up": "^7.0.1",
        "resolve": "^1.17.0",
        "slash": "^3.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "jest-resolve-dependencies": {
@ -3047,6 +3105,14 @@
        "slash": "^3.0.0",
        "strip-bom": "^4.0.0",
        "yargs": "^15.3.1"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+          "dev": true
+        }
      }
    },
    "jest-serializer": {
@ -4345,12 +4411,6 @@
      "integrity": "sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg==",
      "dev": true
    },
-    "slash": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
-      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
-      "dev": true
-    },
    "snapdragon": {
      "version": "0.8.2",
      "resolved": "https://registry.npmjs.org/snapdragon/-/snapdragon-0.8.2.tgz",
@ -4823,7 +4883,8 @@
    "tunnel": {
      "version": "0.0.6",
      "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
-      "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg=="
+      "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==",
+      "dev": true
    },
    "tunnel-agent": {
      "version": "0.6.0",
@ -4960,7 +5021,8 @@
    "uuid": {
      "version": "3.3.2",
      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
+      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+      "dev": true
    },
    "v8-to-istanbul": {
      "version": "4.1.4",
--- a/package.json
+++ b/package.json
@ -35,7 +35,6 @@
    "@actions/github": "^1.1.0",
    "@actions/http-client": "^1.0.8",
    "@actions/io": "^1.0.2",
-    "@actions/tool-cache": "^1.3.1",
    "fast-xml-parser": "^3.15.1",
    "semver": "^6.3.0",
    "xmlbuilder": "^13.0.2"
@ -52,5 +51,8 @@
    "ts-jest": "^26.0.0",
    "typescript": "^3.9.3",
    "wget-improved": "^3.2.1"
+  },
+  "jest": {
+    "testEnvironment": "node"
  }
 }
--- a/src/installer.ts
+++ b/src/installer.ts
@ -1,40 +1,26 @@
 // Load tempDirectory before it gets wiped by tool-cache
-let tempDirectory = process.env['RUNNER_TEMPDIRECTORY'] || '';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 import * as io from '@actions/io';
-import * as tc from '@actions/tool-cache';
 import hc = require('@actions/http-client');
 import {chmodSync} from 'fs';
-import * as os from 'os';
 import * as path from 'path';
+import {ExecOptions} from '@actions/exec/lib/interfaces';
 import * as semver from 'semver';

 const IS_WINDOWS = process.platform === 'win32';

-if (!tempDirectory) {
-  let baseLocation;
-  if (IS_WINDOWS) {
-    // On windows use the USERPROFILE env variable
-    baseLocation = process.env['USERPROFILE'] || 'C:\\';
-  } else {
-    if (process.platform === 'darwin') {
-      baseLocation = '/Users';
-    } else {
-      baseLocation = '/home';
-    }
-  }
-  tempDirectory = path.join(baseLocation, 'actions', 'temp');
-}
-
 /**
 * Represents the inputted version information
 */
 export class DotNetVersionInfo {
+  public inputVersion: string;
  private fullversion: string;
  private isExactVersionSet: boolean = false;

  constructor(version: string) {
+    this.inputVersion = version;
+
    // Check for exact match
    if (semver.valid(semver.clean(version) || '') != null) {
      this.fullversion = semver.clean(version) as string;
@ -89,91 +75,54 @@ export class DotNetVersionInfo {
  }
 }

-/**
- * Represents a resolved version from the Web-Api
- */
-class ResolvedVersionInfo {
-  downloadUrls: string[];
-  resolvedVersion: string;
-
-  constructor(downloadUrls: string[], resolvedVersion: string) {
-    if (downloadUrls.length === 0) {
-      throw 'DownloadUrls can not be empty';
-    }
-
-    if (!resolvedVersion) {
-      throw 'Resolved version is invalid';
-    }
-
-    this.downloadUrls = downloadUrls;
-    this.resolvedVersion = resolvedVersion;
-  }
-}
-
 export class DotnetCoreInstaller {
  constructor(version: string) {
-    this.versionInfo = new DotNetVersionInfo(version);
-    this.cachedToolName = 'dncs';
-    this.arch = 'x64';
+    this.version = version;
  }

  public async installDotnet() {
-    // Check cache
-    let toolPath: string = '';
-    let osSuffixes = await this.detectMachineOS();
-    let parts = osSuffixes[0].split('-');
-    if (parts.length > 1) {
-      this.arch = parts[1];
-    }
-
-    // If version is not generic -> look up cache
-    if (this.versionInfo.isExactVersion())
-      toolPath = this.getLocalTool(this.versionInfo.version());
-
-    if (!toolPath) {
-      // download, extract, cache
-      console.log('Getting a download url', this.versionInfo.version());
-      let resolvedVersionInfo = await this.resolveInfos(
-        osSuffixes,
-        this.versionInfo
-      );
-
-      //Check if cache exists for resolved version
-      toolPath = this.getLocalTool(resolvedVersionInfo.resolvedVersion);
-      if (!toolPath) {
-        //If not exists install it
-        toolPath = await this.downloadAndInstall(resolvedVersionInfo);
-      } else {
-        console.log('Using cached tool');
-      }
-    } else {
-      console.log('Using cached tool');
-    }
-
-    // Need to set this so that .NET Core global tools find the right locations.
-    core.exportVariable('DOTNET_ROOT', toolPath);
-
-    // Prepend the tools path. instructs the agent to prepend for future tasks
-    core.addPath(toolPath);
-  }
-
-  private getLocalTool(version: string): string {
-    console.log('Checking tool cache', version);
-    return tc.find(this.cachedToolName, version, this.arch);
-  }
-
-  private async detectMachineOS(): Promise<string[]> {
-    let osSuffix: string[] = [];
    let output = '';
-
    let resultCode = 0;
+
+    let calculatedVersion = await this.resolveVersion(
+      new DotNetVersionInfo(this.version)
+    );
+
+    var envVariables: {[key: string]: string} = {};
+    for (let key in process.env) {
+      if (process.env[key]) {
+        let value: any = process.env[key];
+        envVariables[key] = value;
+      }
+    }
    if (IS_WINDOWS) {
      let escapedScript = path
-        .join(__dirname, '..', 'externals', 'get-os-platform.ps1')
+        .join(__dirname, '..', 'externals', 'install-dotnet.ps1')
        .replace(/'/g, "''");
      let command = `& '${escapedScript}'`;
+      if (calculatedVersion) {
+        command += ` -Version ${calculatedVersion}`;
+      }
+      if (process.env['https_proxy'] != null) {
+        command += ` -ProxyAddress ${process.env['https_proxy']}`;
+      }
+      // This is not currently an option
+      if (process.env['no_proxy'] != null) {
+        command += ` -ProxyBypassList ${process.env['no_proxy']}`;
+      }

+      // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
      const powershellPath = await io.which('powershell', true);
+
+      var options: ExecOptions = {
+        listeners: {
+          stdout: (data: Buffer) => {
+            output += data.toString();
+          }
+        },
+        env: envVariables
+      };
+
      resultCode = await exec.exec(
        `"${powershellPath}"`,
        [
@ -186,98 +135,63 @@ export class DotnetCoreInstaller {
          '-Command',
          command
        ],
-        {
-          listeners: {
-            stdout: (data: Buffer) => {
-              output += data.toString();
-            }
-          }
-        }
+        options
      );
    } else {
-      let scriptPath = path.join(
-        __dirname,
-        '..',
-        'externals',
-        'get-os-distro.sh'
-      );
-      chmodSync(scriptPath, '777');
+      let escapedScript = path
+        .join(__dirname, '..', 'externals', 'install-dotnet.sh')
+        .replace(/'/g, "''");
+      chmodSync(escapedScript, '777');

-      const toolPath = await io.which(scriptPath, true);
-      resultCode = await exec.exec(`"${toolPath}"`, [], {
+      const scriptPath = await io.which(escapedScript, true);
+
+      let scriptArguments: string[] = [];
+      if (this.version) {
+        scriptArguments.push('--version', this.version);
+      }
+
+      // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
+      resultCode = await exec.exec(`"${scriptPath}"`, scriptArguments, {
        listeners: {
          stdout: (data: Buffer) => {
            output += data.toString();
          }
-        }
+        },
+        env: envVariables
      });
    }

-    if (resultCode != 0) {
-      throw `Failed to detect os with result code ${resultCode}. Output: ${output}`;
-    }
-
-    let index;
-    if ((index = output.indexOf('Primary:')) >= 0) {
-      let primary = output.substr(index + 'Primary:'.length).split(os.EOL)[0];
-      osSuffix.push(primary);
-    }
-
-    if ((index = output.indexOf('Legacy:')) >= 0) {
-      let legacy = output.substr(index + 'Legacy:'.length).split(os.EOL)[0];
-      osSuffix.push(legacy);
-    }
-
-    if (osSuffix.length == 0) {
-      throw 'Could not detect platform';
-    }
-
-    return osSuffix;
-  }
-
-  private async downloadAndInstall(resolvedVersionInfo: ResolvedVersionInfo) {
-    let downloaded = false;
-    let downloadPath = '';
-    for (const url of resolvedVersionInfo.downloadUrls) {
-      try {
-        downloadPath = await tc.downloadTool(url);
-        downloaded = true;
-        break;
-      } catch (error) {
-        console.log('Could not Download', url, JSON.stringify(error));
+    if (process.env['DOTNET_INSTALL_DIR']) {
+      core.addPath(process.env['DOTNET_INSTALL_DIR']);
+    } else {
+      if (IS_WINDOWS) {
+        // This is the default set in install-dotnet.ps1
+        core.addPath(
+          path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet')
+        );
+        core.exportVariable(
+          'DOTNET_ROOT',
+          path.join(process.env['LocalAppData'] + '', 'Microsoft', 'dotnet')
+        );
+      } else {
+        // This is the default set in install-dotnet.sh
+        core.addPath(path.join(process.env['HOME'] + '', '.dotnet'));
      }
    }

-    if (!downloaded) {
-      throw 'Failed to download package';
+    console.log(process.env['PATH']);
+
+    if (resultCode != 0) {
+      throw `Failed to install dotnet ${resultCode}. ${output}`;
    }
-
-    // extract
-    console.log('Extracting Package', downloadPath);
-    let extPath: string = IS_WINDOWS
-      ? await tc.extractZip(downloadPath)
-      : await tc.extractTar(downloadPath);
-
-    // cache tool
-    console.log('Caching tool');
-    let cachedDir = await tc.cacheDir(
-      extPath,
-      this.cachedToolName,
-      resolvedVersionInfo.resolvedVersion,
-      this.arch
-    );
-
-    console.log('Successfully installed', resolvedVersionInfo.resolvedVersion);
-    return cachedDir;
  }

-  // OsSuffixes - The suffix which is a part of the file name ex- linux-x64, windows-x86
-  // Type - SDK / Runtime
  // versionInfo - versionInfo of the SDK/Runtime
-  async resolveInfos(
-    osSuffixes: string[],
-    versionInfo: DotNetVersionInfo
-  ): Promise<ResolvedVersionInfo> {
+  async resolveVersion(versionInfo: DotNetVersionInfo): Promise<string> {
+    if (versionInfo.isExactVersion()) {
+      return versionInfo.version();
+    }
+
    const httpClient = new hc.HttpClient('actions/setup-dotnet', [], {
      allowRetries: true,
      maxRetries: 3
@ -305,67 +219,23 @@ export class DotnetCoreInstaller {
    });

    // Exclude versions that are newer than the latest if using not exact
-    if (!versionInfo.isExactVersion()) {
-      let latestSdk: string = releasesResult['latest-sdk'];
+    let latestSdk: string = releasesResult['latest-sdk'];

-      releasesInfo = releasesInfo.filter((releaseInfo: any) =>
-        semver.lte(releaseInfo['sdk']['version'], latestSdk)
-      );
-    }
+    releasesInfo = releasesInfo.filter((releaseInfo: any) =>
+      semver.lte(releaseInfo['sdk']['version'], latestSdk)
+    );

    // Sort for latest version
    releasesInfo = releasesInfo.sort((a, b) =>
      semver.rcompare(a['sdk']['version'], b['sdk']['version'])
    );

-    let downloadedVersion: string = '';
-    let downloadUrls: string[] = [];
-
-    if (releasesInfo.length != 0) {
-      let release = releasesInfo[0];
-
-      downloadedVersion = release['sdk']['version'];
-
-      let files: any[] = release['sdk']['files'];
-      files = files.filter((file: any) => {
-        if (file['rid'] == osSuffixes[0] || file['rid'] == osSuffixes[1]) {
-          return (
-            file['url'].endsWith('.zip') || file['url'].endsWith('.tar.gz')
-          );
-        }
-      });
-
-      if (files.length > 0) {
-        files.forEach((file: any) => {
-          downloadUrls.push(file['url']);
-        });
-      } else {
-        throw `The specified version's download links are not correctly formed in the supported versions document => ${releasesJsonUrl}`;
-      }
-    } else {
-      console.log(
-        `Could not fetch download information for version ${versionInfo.version()}`
-      );
-
-      if (versionInfo.isExactVersion()) {
-        console.log('Using fallback');
-
-        downloadUrls = await this.getFallbackDownloadUrls(
-          versionInfo.version()
-        );
-        downloadedVersion = versionInfo.version();
-      } else {
-        console.log('Unable to use fallback, version is generic!');
-      }
+    if (releasesInfo.length == 0) {
+      throw `Could not find dotnet core version. Please ensure that specified version ${versionInfo.inputVersion} is valid.`;
    }

-    if (downloadUrls.length == 0) {
-      throw `Could not construct download URL. Please ensure that specified version ${versionInfo.version()}/${downloadedVersion} is valid.`;
-    }
-
-    core.debug(`Got download urls ${downloadUrls}`);
-
-    return new ResolvedVersionInfo(downloadUrls, downloadedVersion);
+    let release = releasesInfo[0];
+    return release['sdk']['version'];
  }

  private async getReleasesJsonUrl(
@ -391,108 +261,7 @@ export class DotnetCoreInstaller {
    return releasesInfo[0]['releases.json'];
  }

-  private async getFallbackDownloadUrls(version: string): Promise<string[]> {
-    let primaryUrlSearchString: string;
-    let legacyUrlSearchString: string;
-    let output = '';
-    let resultCode = 0;
-
-    if (IS_WINDOWS) {
-      let escapedScript = path
-        .join(__dirname, '..', 'externals', 'install-dotnet.ps1')
-        .replace(/'/g, "''");
-      let command = `& '${escapedScript}' -Version ${version} -DryRun`;
-
-      const powershellPath = await io.which('powershell', true);
-      resultCode = await exec.exec(
-        `"${powershellPath}"`,
-        [
-          '-NoLogo',
-          '-Sta',
-          '-NoProfile',
-          '-NonInteractive',
-          '-ExecutionPolicy',
-          'Unrestricted',
-          '-Command',
-          command
-        ],
-        {
-          listeners: {
-            stdout: (data: Buffer) => {
-              output += data.toString();
-            }
-          }
-        }
-      );
-
-      primaryUrlSearchString = 'dotnet-install: Primary named payload URL: ';
-      legacyUrlSearchString = 'dotnet-install: Legacy named payload URL: ';
-    } else {
-      let escapedScript = path
-        .join(__dirname, '..', 'externals', 'install-dotnet.sh')
-        .replace(/'/g, "''");
-      chmodSync(escapedScript, '777');
-
-      const scriptPath = await io.which(escapedScript, true);
-      resultCode = await exec.exec(
-        `"${scriptPath}"`,
-        ['--version', version, '--dry-run'],
-        {
-          listeners: {
-            stdout: (data: Buffer) => {
-              output += data.toString();
-            }
-          }
-        }
-      );
-
-      primaryUrlSearchString = 'dotnet-install: Primary named payload URL: ';
-      legacyUrlSearchString = 'dotnet-install: Legacy named payload URL: ';
-    }
-
-    if (resultCode != 0) {
-      throw `Failed to get download urls with result code ${resultCode}. ${output}`;
-    }
-
-    let primaryUrl: string = '';
-    let legacyUrl: string = '';
-    if (!!output && output.length > 0) {
-      let lines: string[] = output.split(os.EOL);
-
-      // Fallback to \n if initial split doesn't work (not consistent across versions)
-      if (lines.length === 1) {
-        lines = output.split('\n');
-      }
-      if (!!lines && lines.length > 0) {
-        lines.forEach((line: string) => {
-          if (!line) {
-            return;
-          }
-          var primarySearchStringIndex = line.indexOf(primaryUrlSearchString);
-          if (primarySearchStringIndex > -1) {
-            primaryUrl = line.substring(
-              primarySearchStringIndex + primaryUrlSearchString.length
-            );
-            return;
-          }
-
-          var legacySearchStringIndex = line.indexOf(legacyUrlSearchString);
-          if (legacySearchStringIndex > -1) {
-            legacyUrl = line.substring(
-              legacySearchStringIndex + legacyUrlSearchString.length
-            );
-            return;
-          }
-        });
-      }
-    }
-
-    return [primaryUrl, legacyUrl];
-  }
-
-  private versionInfo: DotNetVersionInfo;
-  private cachedToolName: string;
-  private arch: string;
+  private version: string;
 }

 const DotNetCoreIndexUrl: string =