Support multiple versions in single invocation

.github/workflows/workflow.yml

@@ -32,6 +32,29 @@ jobs:
     - name: Verify no unstaged changes
       if: runner.os != 'windows'
       run: __tests__/verify-no-unstaged-changes.sh
+
+  test-setup-multiple-versions:
+    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 toolcache
+        shell: pwsh
+        run: __tests__/clear-toolcache.ps1 ${{ runner.os }}
+      - name: Setup dotnet 2.2.402 and 3.1.404
+        uses: ./
+        with:
+          dotnet-version: |
+             2.2.402
+             3.1.404
+             3.0.x
+      - name: Verify dotnet
+        shell: pwsh
+        run: __tests__/verify-dotnet.ps1 2.2.402 3.1.404 '3.0'
 
   test-setup-full-version:
     runs-on: ${{ matrix.operating-system }}

README.md

@@ -6,7 +6,7 @@
 
 This action sets up a [.NET CLI](https://github.com/dotnet/sdk) environment for use in actions by:
 
-- optionally downloading and caching a version of dotnet by SDK version and adding to PATH
+- optionally downloading and caching a version(s) of dotnet by SDK version(s) and adding to PATH
 - registering problem matchers for error output
 - setting up authentication to private package sources like GitHub Packages
 
@@ -29,7 +29,20 @@ steps:
     dotnet-version: '3.1.x' # SDK Version to use; x will use the latest version of the 3.1 channel
 - run: dotnet build <my project>
 ```
+Multiple versions:
+> Note: In case multiple versions are installed, the latest .NET version will be used by default unless another version is specified in the `global.json` file.
 
+```yml
+steps:
+- name: Setup dotnet
+- uses: actions/checkout@v2
+-  uses: actions/setup-dotnet@v1
+  with:
+    dotnet-version: | 
+      3.1.x
+      5.0.x
+- run: dotnet build <my project>
+```
 Preview version:
 ```yml
 steps:

__tests__/installer.test.ts

@@ -32,6 +32,27 @@ describe('installer tests', () => {
     }
   }, 30000);
 
+  it('Aquires multiple versions of dotnet', async () => {
+    const versions = ['2.2.207', '3.1.120'];
+
+    for (const version of versions) {
+      await getDotnet(version);
+    }
+    expect(fs.existsSync(path.join(toolDir, 'sdk', '2.2.207'))).toBe(true);
+    expect(fs.existsSync(path.join(toolDir, 'sdk', '3.1.120'))).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);
+    }
+
+    expect(process.env.DOTNET_ROOT).toBeDefined;
+    expect(process.env.PATH).toBeDefined;
+    expect(process.env.DOTNET_ROOT).toBe(toolDir);
+    expect(process.env.PATH?.startsWith(toolDir)).toBe(true);
+  }, 600000);
+
   it('Acquires version of dotnet if no matching version is installed', async () => {
     await getDotnet('3.1.201');
     expect(fs.existsSync(path.join(toolDir, 'sdk', '3.1.201'))).toBe(true);
@@ -126,4 +147,5 @@ function normalizeFileContents(contents: string): string {
 async function getDotnet(version: string): Promise<void> {
   const dotnetInstaller = new installer.DotnetCoreInstaller(version);
   await dotnetInstaller.installDotnet();
+  installer.DotnetCoreInstaller.addToPath();
 }

__tests__/sample-csproj/sample.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;netcoreapp2.2</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;netcoreapp3.0;netcoreapp2.2</TargetFrameworks>
     <RootNamespace>sample_csproj</RootNamespace>
 
     <IsPackable>false</IsPackable>

__tests__/verify-dotnet.ps1

@@ -6,29 +6,33 @@ if (!$args[0])
 $dotnet = Get-Command dotnet | Select-Object -First 1 | ForEach-Object { $_.Path }
 Write-Host "Found '$dotnet'"
 
-$version = & $dotnet --version | Out-String | ForEach-Object { $_.Trim() }
-Write-Host "Version $version"
-if (-not ($version.StartsWith($args[0].ToString())))
+if($args.count -eq 1)
 {
-  Write-Host "PATH='$env:PATH'"
-  throw "Unexpected version"
+  $version = & $dotnet --version | Out-String | ForEach-Object { $_.Trim() }
+  Write-Host "Version $version"
+  if (-not ($version.StartsWith($args[0].ToString())))
+  {
+    Write-Host "PATH='$env:PATH'"
+    throw "Unexpected version"
+  }
 }
 
 if ($args[1])
 {
   # SDKs are listed on multiple lines with the path afterwards in square brackets
   $versions = & $dotnet --list-sdks | ForEach-Object { $_.SubString(0, $_.IndexOf('[')).Trim() }
   Write-Host "Installed versions: $versions"
-  $isInstalledVersion = $false
-  foreach ($version in $versions)
-  {
-    if ($version.StartsWith($args[1].ToString())) 
+  $InstalledVersionCount = 0
+  foreach($arg in $args){
+    foreach ($version in $versions)
     {
-      $isInstalledVersion = $true
-      break
+      if ($version.StartsWith($arg.ToString())) 
+      {
+        $InstalledVersionCount++
+      }
     }
-  }
-  if (-not $isInstalledVersion)
+   }
+  if ( $InstalledVersionCount -ne $args.Count)
   {
     Write-Host "PATH='$env:PATH'"
     throw "Unexpected version"
@@ -53,6 +57,13 @@ if ($args[1])
     throw "Unexpected output"
   }
 }
+if ($args[2])
+{
+  if ($sample_output -notlike "*Test Run Successful.*Test Run Successful.*Test Run Successful.*")
+  {
+    throw "Unexpected output"
+  }
+}
 else
 {
   if ($sample_output -notlike "*Test Run Successful.*")

action.yml

@@ -6,7 +6,7 @@ branding:
   color: green
 inputs:
   dotnet-version:
-    description: 'Optional SDK version to use. If not provided, will install global.json version when available. Examples: 2.2.104, 3.1, 3.1.x'
+    description: 'Optional SDK version(s) to use. If not provided, will install global.json version when available. Examples: 2.2.104, 3.1, 3.1.x'
   source-url:
     description: 'Optional package source for which to set up authentication. Will consult any existing NuGet.config in the root of the repo and provide a temporary NuGet.config using the NUGET_AUTH_TOKEN environment variable as a ClearTextPassword'
   owner: