Add support for using Digest for base image

Add support for using image digest (sha256) for the base image when using the `PublishContainer` target.

For example:
`mcr.microsoft.com/dotnet/aspnet@sha256:6cec36412a215aad2a033cfe259890482be0a1dcb680e81fccc393b2d4069455`

src/Containers/Microsoft.NET.Build.Containers/ContainerBuilder.cs

@@ -14,6 +14,7 @@ internal static async Task<int> ContainerizeAsync(
         string baseRegistry,
         string baseImageName,
         string baseImageTag,
+        string? baseImageDigest,
         string[] entrypoint,
         string[] entrypointArgs,
         string[] defaultArgs,
@@ -47,7 +48,7 @@ internal static async Task<int> ContainerizeAsync(
         bool isLocalPull = string.IsNullOrEmpty(baseRegistry);
         RegistryMode sourceRegistryMode = baseRegistry.Equals(outputRegistry, StringComparison.InvariantCultureIgnoreCase) ? RegistryMode.PullFromOutput : RegistryMode.Pull;
         Registry? sourceRegistry = isLocalPull ? null : new Registry(baseRegistry, logger, sourceRegistryMode);
-        SourceImageReference sourceImageReference = new(sourceRegistry, baseImageName, baseImageTag);
+        SourceImageReference sourceImageReference = new(sourceRegistry, baseImageName, baseImageTag, baseImageDigest);
 
         DestinationImageReference destinationImageReference = DestinationImageReference.CreateFromSettings(
             imageName,
@@ -62,17 +63,18 @@ internal static async Task<int> ContainerizeAsync(
         {
             try
             {
+                string imageReference = !string.IsNullOrEmpty(baseImageDigest) ? baseImageDigest : baseImageTag;
                 var ridGraphPicker = new RidGraphManifestPicker(ridGraphPath);
                 imageBuilder = await registry.GetImageManifestAsync(
                     baseImageName,
-                    baseImageTag,
+                    imageReference,
                     containerRuntimeIdentifier,
                     ridGraphPicker,
                     cancellationToken).ConfigureAwait(false);
             }
             catch (RepositoryNotFoundException)
             {
-                logger.LogError(Resource.FormatString(nameof(Strings.RepositoryNotFound), baseImageName, baseImageTag, registry.RegistryName));
+                logger.LogError(Resource.FormatString(nameof(Strings.RepositoryNotFound), baseImageName, baseImageTag, baseImageDigest, registry.RegistryName));
                 return 1;
             }
             catch (UnableToAccessRepositoryException)

src/Containers/Microsoft.NET.Build.Containers/KnownStrings.cs

@@ -31,6 +31,7 @@ public static class Properties
         public static readonly string ContainerBaseRegistry = nameof(ContainerBaseRegistry);
         public static readonly string ContainerBaseName = nameof(ContainerBaseName);
         public static readonly string ContainerBaseTag = nameof(ContainerBaseTag);
+        public static readonly string ContainerBaseDigest = nameof(ContainerBaseDigest);
 
         public static readonly string ContainerGenerateLabels = nameof(ContainerGenerateLabels);
 

src/Containers/Microsoft.NET.Build.Containers/PublicAPI/net472/PublicAPI.Unshipped.txt

@@ -29,6 +29,8 @@ Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageName.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageName.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageTag.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageTag.set -> void
+Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageDigest.get -> string!
+Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageDigest.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseRegistry.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseRegistry.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.ContainerEnvironmentVariables.get -> Microsoft.Build.Framework.ITaskItem![]!
@@ -111,6 +113,7 @@ Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParseContainerProp
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerImage.get -> string!
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerRegistry.get -> string!
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerTag.get -> string!
+Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerDigest.get -> string!
 override Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.Execute() -> bool
 static Microsoft.NET.Build.Containers.ContainerHelpers.TryParsePort(string! input, out Microsoft.NET.Build.Containers.Port? port, out Microsoft.NET.Build.Containers.ContainerHelpers.ParsePortError? error) -> bool
 static Microsoft.NET.Build.Containers.ContainerHelpers.TryParsePort(string? portNumber, string? portType, out Microsoft.NET.Build.Containers.Port? port, out Microsoft.NET.Build.Containers.ContainerHelpers.ParsePortError? error) -> bool
@@ -134,4 +137,4 @@ Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.SdkVersion.get
 Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.SdkVersion.set -> void
 Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.TargetFrameworkVersion.get -> string!
 Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.TargetFrameworkVersion.set -> void
-override Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.Execute() -> bool
+override Microsoft.NET.Build.Containers.Tasks.ComputeDotnetBaseImageAndTag.Execute() -> bool

src/Containers/Microsoft.NET.Build.Containers/PublicAPI/net9.0/PublicAPI.Unshipped.txt

@@ -148,6 +148,8 @@ Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageName.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageName.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageTag.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageTag.set -> void
+Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageDigest.get -> string!
+Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseImageDigest.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseRegistry.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.BaseRegistry.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateNewImage.Cancel() -> void
@@ -232,6 +234,7 @@ Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParseContainerProp
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerImage.get -> string!
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerRegistry.get -> string!
 Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerTag.get -> string!
+Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.ParsedContainerDigest.get -> string!
 override Microsoft.NET.Build.Containers.Tasks.CreateNewImage.Execute() -> bool
 override Microsoft.NET.Build.Containers.Tasks.ParseContainerProperties.Execute() -> bool
 static Microsoft.NET.Build.Containers.ContainerHelpers.TryParsePort(string! input, out Microsoft.NET.Build.Containers.Port? port, out Microsoft.NET.Build.Containers.ContainerHelpers.ParsePortError? error) -> bool
@@ -284,4 +287,4 @@ static Microsoft.NET.Build.Containers.ImageIndexV1.operator ==(Microsoft.NET.Bui
 override Microsoft.NET.Build.Containers.ImageIndexV1.GetHashCode() -> int
 ~override Microsoft.NET.Build.Containers.ImageIndexV1.Equals(object obj) -> bool
 Microsoft.NET.Build.Containers.ImageIndexV1.Equals(Microsoft.NET.Build.Containers.ImageIndexV1 other) -> bool
-Microsoft.NET.Build.Containers.ImageIndexV1.Deconstruct(out int schemaVersion, out string! mediaType, out Microsoft.NET.Build.Containers.PlatformSpecificManifest[]! manifests) -> void
+Microsoft.NET.Build.Containers.ImageIndexV1.Deconstruct(out int schemaVersion, out string! mediaType, out Microsoft.NET.Build.Containers.PlatformSpecificManifest[]! manifests) -> void

src/Containers/Microsoft.NET.Build.Containers/SourceImageReference.cs

@@ -4,24 +4,43 @@
 namespace Microsoft.NET.Build.Containers;
 
 /// <summary>
-/// Represents a reference to a Docker image. A reference is made of a registry, a repository (aka the image name) and a tag.
+/// Represents a reference to a Docker image. A reference is made of a registry, a repository (aka the image name) and a tag or digest.
 /// </summary>
-internal readonly record struct SourceImageReference(Registry? Registry, string Repository, string Tag)
+internal readonly record struct SourceImageReference(Registry? Registry, string Repository, string Tag, string? Digest)
 {
     public override string ToString()
     {
-        if (Registry is { } reg) 
+        if (Registry is { } reg)
         {
-            return $"{reg.RegistryName}/{Repository}:{Tag}";
-        } 
-        else 
+            if (Digest is { } dig)
+            {
+                return $"{reg.RegistryName}/{Repository}@{dig}";
+            }
+            else
+            {
+                return $"{reg.RegistryName}/{Repository}:{Tag}";
+            }
+        }
+        else
         {
-            return RepositoryAndTag;
+            if (Digest is { } dig)
+            {
+                return RepositoryAndDigest;
+            }
+            else
+            {
+                return RepositoryAndTag;
+            }
         }
     }
 
     /// <summary>
     /// Returns the repository and tag as a formatted string. Used in cases
     /// </summary>
     public readonly string RepositoryAndTag => $"{Repository}:{Tag}";
+
+    /// <summary>
+    /// Returns the repository and digest as a formatted string.
+    /// </summary>
+    public readonly string RepositoryAndDigest => $"{Repository}@{Digest}";
 }

src/Containers/Microsoft.NET.Build.Containers/Tasks/CreateNewImage.Interface.cs

@@ -37,6 +37,12 @@ partial class CreateNewImage
     [Required]
     public string BaseImageTag { get; set; }
 
+    /// <summary>
+    /// The base image digest.
+    /// Ex: sha256:12345...
+    /// </summary>
+    public string BaseImageDigest { get; set; }
+
     /// <summary>
     /// The registry to push to.
     /// </summary>
@@ -184,6 +190,7 @@ public CreateNewImage()
         BaseRegistry = "";
         BaseImageName = "";
         BaseImageTag = "";
+        BaseImageDigest = "";
         OutputRegistry = "";
         ArchiveOutputPath = "";
         Repository = "";

src/Containers/Microsoft.NET.Build.Containers/Tasks/CreateNewImage.cs

@@ -62,7 +62,7 @@ internal async Task<bool> ExecuteAsync(CancellationToken cancellationToken)
 
         RegistryMode sourceRegistryMode = BaseRegistry.Equals(OutputRegistry, StringComparison.InvariantCultureIgnoreCase) ? RegistryMode.PullFromOutput : RegistryMode.Pull;
         Registry? sourceRegistry = IsLocalPull ? null : new Registry(BaseRegistry, logger, sourceRegistryMode);
-        SourceImageReference sourceImageReference = new(sourceRegistry, BaseImageName, BaseImageTag);
+        SourceImageReference sourceImageReference = new(sourceRegistry, BaseImageName, BaseImageTag, BaseImageDigest);
 
         DestinationImageReference destinationImageReference = DestinationImageReference.CreateFromSettings(
             Repository,
@@ -79,18 +79,19 @@ internal async Task<bool> ExecuteAsync(CancellationToken cancellationToken)
         {
             try
             {
+                string imageReference = !string.IsNullOrEmpty(BaseImageDigest) ? BaseImageDigest : BaseImageTag;
                 var picker = new RidGraphManifestPicker(RuntimeIdentifierGraphPath);
                 imageBuilder = await registry.GetImageManifestAsync(
                     BaseImageName,
-                    BaseImageTag,
+                    imageReference,
                     ContainerRuntimeIdentifier,
                     picker,
                     cancellationToken).ConfigureAwait(false);
             }
             catch (RepositoryNotFoundException)
             {
                 telemetry.LogUnknownRepository();
-                Log.LogErrorWithCodeFromResources(nameof(Strings.RepositoryNotFound), BaseImageName, BaseImageTag, registry.RegistryName);
+                Log.LogErrorWithCodeFromResources(nameof(Strings.RepositoryNotFound), BaseImageName, BaseImageTag, BaseImageDigest, registry.RegistryName);
                 return !Log.HasLoggedErrors;
             }
             catch (UnableToAccessRepositoryException)

src/Containers/Microsoft.NET.Build.Containers/Tasks/CreateNewImageToolTask.cs

@@ -107,6 +107,10 @@ internal string GenerateCommandLineCommandsInt()
         {
             builder.AppendSwitchIfNotNull("--baseimagetag ", BaseImageTag);
         }
+        if (!string.IsNullOrWhiteSpace(BaseImageDigest))
+        {
+            builder.AppendSwitchIfNotNull("--baseimagedigest ", BaseImageDigest);
+        }
         if (!string.IsNullOrWhiteSpace(OutputRegistry))
         {
             builder.AppendSwitchIfNotNull("--outputregistry ", OutputRegistry);

src/Containers/Microsoft.NET.Build.Containers/Tasks/ParseContainerProperties.cs

@@ -48,6 +48,9 @@ public sealed class ParseContainerProperties : Microsoft.Build.Utilities.Task
     [Output]
     public string ParsedContainerTag { get; private set; }
 
+    [Output]
+    public string ParsedContainerDigest { get; private set; }
+
     [Output]
     public string NewContainerRegistry { get; private set; }
 
@@ -71,6 +74,7 @@ public ParseContainerProperties()
         ParsedContainerRegistry = "";
         ParsedContainerImage = "";
         ParsedContainerTag = "";
+        ParsedContainerDigest = "";
         NewContainerRegistry = "";
         NewContainerRepository = "";
         NewContainerTags = Array.Empty<string>();
@@ -132,7 +136,7 @@ public override bool Execute()
                                                                   out string? outputReg,
                                                                   out string? outputImage,
                                                                   out string? outputTag,
-                                                                  out string? _outputDigest,
+                                                                  out string? outputDigest,
                                                                   out bool isRegistrySpecified))
         {
             Log.LogErrorWithCodeFromResources(nameof(Strings.BaseImageNameParsingFailed), nameof(FullyQualifiedBaseImageName), FullyQualifiedBaseImageName);
@@ -163,6 +167,7 @@ public override bool Execute()
         ParsedContainerRegistry = outputReg ?? "";
         ParsedContainerImage = outputImage ?? "";
         ParsedContainerTag = outputTag ?? "";
+        ParsedContainerDigest = outputDigest ?? "";
         NewContainerRegistry = ContainerRegistry;
         NewContainerTags = validTags;
 
@@ -172,6 +177,7 @@ public override bool Execute()
             Log.LogMessage(MessageImportance.Low, "Host: {0}", ParsedContainerRegistry);
             Log.LogMessage(MessageImportance.Low, "Image: {0}", ParsedContainerImage);
             Log.LogMessage(MessageImportance.Low, "Tag: {0}", ParsedContainerTag);
+            Log.LogMessage(MessageImportance.Low, "Digest: {0}", ParsedContainerDigest);
             Log.LogMessage(MessageImportance.Low, "Image Name: {0}", NewContainerRepository);
             Log.LogMessage(MessageImportance.Low, "Image Tags: {0}", string.Join(", ", NewContainerTags));
         }

src/Containers/containerize/ContainerizeCommand.cs

@@ -35,6 +35,12 @@ internal class ContainerizeCommand : CliRootCommand
         DefaultValueFactory = (_) => "latest"
     };
 
+    internal CliOption<string> BaseImageDigestOption { get; } = new("--baseimagedigest")
+    {
+        Description = "The base image digest. Ex: sha256:6cec3641...",
+        Required = false
+    };
+
     internal CliOption<string> OutputRegistryOption { get; } = new("--outputregistry")
     {
         Description = "The registry to push to.",
@@ -204,6 +210,7 @@ internal ContainerizeCommand() : base("Containerize an application without Docke
         Options.Add(BaseRegistryOption);
         Options.Add(BaseImageNameOption);
         Options.Add(BaseImageTagOption);
+        Options.Add(BaseImageDigestOption);
         Options.Add(OutputRegistryOption);
         Options.Add(ArchiveOutputPathOption);
         Options.Add(RepositoryOption);
@@ -232,6 +239,7 @@ internal ContainerizeCommand() : base("Containerize an application without Docke
             string _baseReg = parseResult.GetValue(BaseRegistryOption)!;
             string _baseName = parseResult.GetValue(BaseImageNameOption)!;
             string _baseTag = parseResult.GetValue(BaseImageTagOption)!;
+            string? _baseDigest = parseResult.GetValue(BaseImageDigestOption);
             string? _outputReg = parseResult.GetValue(OutputRegistryOption);
             string? _archiveOutputPath = parseResult.GetValue(ArchiveOutputPathOption);
             string _name = parseResult.GetValue(RepositoryOption)!;
@@ -264,6 +272,7 @@ await ContainerBuilder.ContainerizeAsync(
                 _baseReg,
                 _baseName,
                 _baseTag,
+                _baseDigest,
                 _entrypoint,
                 _entrypointArgs,
                 _defaultArgs,

src/Containers/packaging/build/Microsoft.NET.Build.Containers.targets

@@ -119,6 +119,7 @@
       <Output TaskParameter="ParsedContainerRegistry" PropertyName="ContainerBaseRegistry" />
       <Output TaskParameter="ParsedContainerImage" PropertyName="ContainerBaseName" />
       <Output TaskParameter="ParsedContainerTag" PropertyName="ContainerBaseTag" />
+      <Output TaskParameter="ParsedContainerDigest" PropertyName="ContainerBaseDigest" />
       <Output TaskParameter="NewContainerRegistry" PropertyName="ContainerRegistry" />
       <Output TaskParameter="NewContainerRepository" PropertyName="ContainerRepository" />
       <Output TaskParameter="NewContainerTags" ItemName="ContainerImageTags" />
@@ -244,6 +245,7 @@
                     BaseRegistry="$(ContainerBaseRegistry)"
                     BaseImageName="$(ContainerBaseName)"
                     BaseImageTag="$(ContainerBaseTag)"
+                    BaseImageDigest="$(ContainerBaseDigest)"
                     LocalRegistry="$(LocalRegistry)"
                     OutputRegistry="$(ContainerRegistry)"
                     ArchiveOutputPath="$(ContainerArchiveOutputPath)"

test/Microsoft.NET.Build.Containers.IntegrationTests/CreateNewImageTests.cs

@@ -240,7 +240,7 @@ public async System.Threading.Tasks.Task CreateNewImage_RootlessBaseImage()
 
         BuiltImage builtImage = imageBuilder.Build();
 
-        var sourceReference = new SourceImageReference(registry, DockerRegistryManager.RuntimeBaseImage, DockerRegistryManager.Net8ImageTag);
+        var sourceReference = new SourceImageReference(registry, DockerRegistryManager.RuntimeBaseImage, DockerRegistryManager.Net8ImageTag, null);
         var destinationReference = new DestinationImageReference(registry, RootlessBase, new[] { "latest" });
 
         await registry.PushAsync(builtImage, sourceReference, destinationReference, cancellationToken: default).ConfigureAwait(false);