Pass compression level to extension containers

src/api/wix/WixToolset.Extensibility/BaseBurnContainerExtension.cs

@@ -7,6 +7,7 @@ namespace WixToolset.Extensibility
     using System.Security.Cryptography;
     using System.Text;
     using System.Xml;
+    using WixToolset.Data;
     using WixToolset.Data.Symbols;
     using WixToolset.Extensibility.Data;
     using WixToolset.Extensibility.Services;
@@ -52,9 +53,10 @@ public virtual void PreBackendBind(IBindContext context)
         /// </summary>
         /// <param name="container">The container symbol.</param>
         /// <param name="containerPayloads">Collection of payloads that should be compressed in the container.</param>
+        /// <param name="level">Compression level. It is up to extension developers to map CompressionLevel values to a relevant compression level of their extension.</param>
         /// <param name="sha512">SHA512 hash of the container file.</param>
         /// <param name="size">File size of the container file.</param>
-        public abstract void CreateContainer(WixBundleContainerSymbol container, IEnumerable<WixBundlePayloadSymbol> containerPayloads, out string sha512, out long size);
+        public abstract void CreateContainer(WixBundleContainerSymbol container, IEnumerable<WixBundlePayloadSymbol> containerPayloads, CompressionLevel? level, out string sha512, out long size);
 
         /// <summary>
         /// Extract the container to a folder. Called on 'burn extract' command.

src/api/wix/WixToolset.Extensibility/IBurnContainerExtension.cs

@@ -4,6 +4,7 @@ namespace WixToolset.Extensibility
 {
     using System.Collections.Generic;
     using System.Xml;
+    using WixToolset.Data;
     using WixToolset.Data.Symbols;
     using WixToolset.Extensibility.Data;
 
@@ -28,9 +29,10 @@ public interface IBurnContainerExtension
         /// </summary>
         /// <param name="container">The container symbol.</param>
         /// <param name="containerPayloads">Collection of payloads that should be compressed in the container.</param>
+        /// <param name="level">Compression level. It is up to extension developers to map CompressionLevel values to a relevant compression level of their extension.</param>
         /// <param name="sha512">SHA512 hash of the container file.</param>
         /// <param name="size">File size of the container file.</param>
-        void CreateContainer(WixBundleContainerSymbol container, IEnumerable<WixBundlePayloadSymbol> containerPayloads, out string sha512, out long size);
+        void CreateContainer(WixBundleContainerSymbol container, IEnumerable<WixBundlePayloadSymbol> containerPayloads, CompressionLevel? level, out string sha512, out long size);
 
         /// <summary>
         /// Extract the container to a folder. Called on 'burn extract' command.

src/wix/WixToolset.Core.Burn/Bundles/CreateNonUXContainers.cs

@@ -160,7 +160,7 @@ private void CreateContainer(WixBundleContainerSymbol container, IEnumerable<Wix
                 return;
             }
 
-            containerExtension.CreateContainer(container, containerPayloads, out string sha512, out long size);
+            containerExtension.CreateContainer(container, containerPayloads, this.DefaultCompressionLevel, out string sha512, out long size);
 
             container.Hash = sha512;
             container.Size = size;