add BaseImageDigest param to CreateImageIndex task

Author: surayya-MS

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

@@ -25,6 +25,8 @@ Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageName.get -> strin
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageName.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageTag.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageTag.set -> void
+Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageDigest.get -> string!
+Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.BaseImageDigest.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.ArchiveOutputPath.get -> string!
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.ArchiveOutputPath.set -> void
 Microsoft.NET.Build.Containers.Tasks.CreateImageIndex.LocalRegistry.get -> string!

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

@@ -25,9 +25,14 @@ partial class CreateImageIndex
     /// The base image tag.
     /// Ex: 6.0
     /// </summary>
-    [Required]
     public string BaseImageTag { get; set; }
 
+    /// <summary>
+    /// The base image digest.
+    /// Ex: sha256:12345...
+    /// </summary>
+    public string BaseImageDigest { get; set; }
+
     /// <summary>
     /// Manifests to include in the image index.
     /// </summary>
@@ -78,6 +83,7 @@ public CreateImageIndex()
         BaseRegistry = string.Empty;
         BaseImageName = string.Empty;
         BaseImageTag = string.Empty;
+        BaseImageDigest = string.Empty;
         GeneratedContainers = Array.Empty<ITaskItem>();
         OutputRegistry = string.Empty;
         ArchiveOutputPath = string.Empty;

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

@@ -58,7 +58,7 @@ 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,

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

@@ -322,6 +322,7 @@
           ContainerBaseRegistry=$(ContainerBaseRegistry);
           ContainerBaseName=$(ContainerBaseName);
           ContainerBaseTag=$(ContainerBaseTag);
+          ContainerBaseDigest=$(ContainerBaseDigest);
           ContainerRegistry=$(ContainerRegistry);
           _ContainerImageTags=@(ContainerImageTags, ';');
           ContainerRepository=$(ContainerRepository);
@@ -359,7 +360,8 @@
                       ImageTags="@(ContainerImageTags)"
                       BaseRegistry="$(ContainerBaseRegistry)"
                       BaseImageName="$(ContainerBaseName)"
-                      BaseImageTag="$(ContainerBaseTag)">
+                      BaseImageTag="$(ContainerBaseTag)"
+                      BaseImageDigest="$(ContainerBaseDigest)">
       <Output TaskParameter="GeneratedImageIndex" PropertyName="GeneratedImageIndex" />
       <Output TaskParameter="GeneratedArchiveOutputPath" PropertyName="GeneratedArchiveOutputPath" />
     </CreateImageIndex>