Add alpine source build CI leg (#15765)

eng/pipelines/templates/stages/vmr-build.yml

@@ -13,6 +13,7 @@ parameters:
 
   # The following parameters aren't expected to be passed in rather they are used for encapsulation
   # -----------------------------------------------------------------------------------------------
+  alpine317Container: mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.17
   centOSStream8Container: mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream8
   centOSStream9Container: mcr.microsoft.com/dotnet-buildtools/prereqs:centos-stream9
   debian11Arm64Container: mcr.microsoft.com/dotnet-buildtools/prereqs:debian-11-arm64v8
@@ -65,6 +66,9 @@ stages:
       value: ${{ replace(replace(variables['Build.SourceBranch'], 'refs/heads/', ''), 'refs/pull/', '') }}
 
   jobs:
+
+  # PR and CI legs ------------------------------------
+
   - template: ../jobs/vmr-build.yml
     parameters:
       buildName: CentOSStream8_Online_MsftSdk
@@ -84,6 +88,27 @@ stages:
       withPreviousSDK: false             # 🚫
 
   - ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
+
+    # CI - Stage 1 x64 legs ------------------------------------
+
+    - template: ../jobs/vmr-build.yml
+      parameters:
+        buildName: Alpine317_Offline_MsftSdk
+        isBuiltFromVmr: ${{ parameters.isBuiltFromVmr }}
+        vmrBranch: ${{ variables.VmrBranch }}
+        architecture: x64
+        pool:
+          name: ${{ variables.defaultPoolName }}
+          demands: ${{ variables.defaultPoolDemands }}
+        container: ${{ parameters.alpine317Container }}
+        buildFromArchive: false            # ✅
+        enablePoison: false                # 🚫
+        excludeOmniSharpTests: true        # ✅
+        overrideDistroDisablingSha1: false # 🚫
+        runOnline: false                   # 🚫
+        useMonoRuntime: false              # 🚫
+        withPreviousSDK: false             # 🚫
+
     - template: ../jobs/vmr-build.yml
       parameters:
         buildName: CentOSStream8_Online_PreviousSourceBuiltSdk
@@ -192,6 +217,8 @@ stages:
         useMonoRuntime: false              # 🚫
         withPreviousSDK: false             # 🚫
 
+    # CI - Stage 1 arm64 Legs ------------------------------------
+
     - template: ../jobs/vmr-build.yml
       parameters:
         buildName: Debian11_Offline_MsftSdk
@@ -208,6 +235,8 @@ stages:
         useMonoRuntime: false              # 🚫
         withPreviousSDK: false             # 🚫
 
+    # CI - Stage 2 x64 Legs ------------------------------------
+
     - template: ../jobs/vmr-build.yml
       parameters:
         buildName: CentOSStream8_Online_CurrentSourceBuiltSdk

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/DotNetHelper.cs

@@ -36,7 +36,7 @@ internal class DotNetHelper
                 }
 
                 Directory.CreateDirectory(Config.DotNetDirectory);
-                ExecuteHelper.ExecuteProcessValidateExitCode("tar", $"xzf {Config.SdkTarballPath} -C {Config.DotNetDirectory}", outputHelper);
+                Utilities.ExtractTarball(Config.SdkTarballPath, Config.DotNetDirectory);
             }
             IsMonoRuntime = DetermineIsMonoRuntime(Config.DotNetDirectory);
 

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/Microsoft.DotNet.SourceBuild.SmokeTests.csproj

@@ -9,6 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.FileSystemGlobbing" Version="7.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/OmniSharpTests.cs

@@ -65,7 +65,7 @@ public class OmniSharpTests : SmokeTests
             await client.DownloadFileAsync(omniSharpTarballUrl, omniSharpTarballFile, OutputHelper);
 
             Directory.CreateDirectory(OmniSharpDirectory);
-            ExecuteHelper.ExecuteProcessValidateExitCode("tar", $"xzf {omniSharpTarballFile} -C {OmniSharpDirectory}", OutputHelper);
+            Utilities.ExtractTarball(omniSharpTarballFile, OmniSharpDirectory);
         }
     }
 }

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/SdkContentTests.cs

@@ -43,7 +43,7 @@ public class SdkContentTests : SmokeTests
             throw new InvalidOperationException($"Tarball path '{tarballPath}' does not exist.");
         }
 
-        string fileListing = ExecuteHelper.ExecuteProcessValidateExitCode("tar", $"tf {tarballPath}", OutputHelper);
+        string fileListing = Utilities.GetTarballContentNames(tarballPath).Aggregate((a, b) => $"{a}{Environment.NewLine}{b}");
         fileListing = BaselineHelper.RemoveRids(fileListing, isPortable);
         fileListing = BaselineHelper.RemoveVersions(fileListing);
         IEnumerable<string> files = fileListing.Split(Environment.NewLine).OrderBy(path => path);

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/SourceBuiltArtifactsTests.cs

@@ -1,4 +1,8 @@
-using System;
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -22,7 +26,7 @@ public class SourceBuiltArtifactsTests : SmokeTests
         try
         {
             // Extract the .version file
-            ExtractFileFromTarball(Config.SourceBuiltArtifactsPath, ".version", outputDir);
+            Utilities.ExtractTarball(Config.SourceBuiltArtifactsPath, outputDir, ".version");
 
             string[] versionLines = File.ReadAllLines(Path.Combine(outputDir, ".version"));
             Assert.Equal(2, versionLines.Length);
@@ -48,7 +52,7 @@ public class SourceBuiltArtifactsTests : SmokeTests
             string sdkVersion = versionLines[1];
 
             // Find the expected SDK version by getting it from the SDK tarball
-            ExtractFileFromTarball(Config.SdkTarballPath ?? string.Empty, "./sdk/*/.version", outputDir);
+            Utilities.ExtractTarball(Config.SdkTarballPath ?? string.Empty, outputDir, "./sdk/*/.version");
             DirectoryInfo sdkDir = new DirectoryInfo(Path.Combine(outputDir, "sdk"));
             string sdkVersionPath = sdkDir.GetFiles(".version", SearchOption.AllDirectories).Single().FullName;
             string[] sdkVersionLines = File.ReadAllLines(Path.Combine(outputDir, sdkVersionPath));
@@ -61,9 +65,4 @@ public class SourceBuiltArtifactsTests : SmokeTests
             Directory.Delete(outputDir, recursive: true);
         }
     }
-
-    private void ExtractFileFromTarball(string tarballPath, string filePath, string outputDir)
-    {
-        ExecuteHelper.ExecuteProcessValidateExitCode("tar", $"--wildcards -xzf {tarballPath} -C {outputDir} {filePath}", OutputHelper);
-    }
 }

src/SourceBuild/content/test/Microsoft.DotNet.SourceBuild.SmokeTests/Utilities.cs

@@ -2,7 +2,12 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using Microsoft.Extensions.FileSystemGlobbing;
 using System;
+using System.Collections.Generic;
+using System.Formats.Tar;
+using System.IO;
+using System.IO.Compression;
 using System.Threading;
 using System.Threading.Tasks;
 using Xunit.Abstractions;
@@ -11,6 +16,50 @@ namespace Microsoft.DotNet.SourceBuild.SmokeTests;
 
 public static class Utilities
 {
+    public static void ExtractTarball(string tarballPath, string outputDir)
+    {
+        using FileStream fileStream = File.OpenRead(tarballPath);
+        using GZipStream decompressorStream = new(fileStream, CompressionMode.Decompress);
+        TarFile.ExtractToDirectory(decompressorStream, outputDir, true);
+    }
+
+    public static void ExtractTarball(string tarballPath, string outputDir, string targetFilePath)
+    {
+        Matcher matcher = new();
+        matcher.AddInclude(targetFilePath);
+
+        using FileStream fileStream = File.OpenRead(tarballPath);
+        using GZipStream decompressorStream = new(fileStream, CompressionMode.Decompress);
+        using TarReader reader = new(decompressorStream);
+
+        TarEntry entry;
+        while ((entry = reader.GetNextEntry()) is not null)
+        {
+            if (matcher.Match(entry.Name).HasMatches)
+            {
+                string outputPath = Path.Join(outputDir, entry.Name);
+                Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
+
+                using FileStream outputFileStream = File.Create(outputPath);
+                entry.DataStream.CopyTo(outputFileStream);
+                break;
+            }
+        }
+    }
+
+    public static IEnumerable<string> GetTarballContentNames(string tarballPath)
+    {
+        using FileStream fileStream = File.OpenRead(tarballPath);
+        using GZipStream decompressorStream = new(fileStream, CompressionMode.Decompress);
+        using TarReader reader = new(decompressorStream);
+
+        TarEntry entry;
+        while ((entry = reader.GetNextEntry()) is not null)
+        {
+            yield return entry.Name;
+        }
+    }
+
     public static async Task RetryAsync(Func<Task> executor, ITestOutputHelper outputHelper)
     {
         await Utilities.RetryAsync(