[Backport 7.x] Support index template v2 APIs in NEST

src/ApiGenerator/ApiGenerator.csproj

@@ -8,6 +8,11 @@
     <NoWarn>CS1591;NU1701</NoWarn>
     <PreserveCompilationContext>true</PreserveCompilationContext>
   </PropertyGroup>
+  <ItemGroup>
+    <Compile Remove="RestSpecification\XPack\**" />
+    <EmbeddedResource Remove="RestSpecification\XPack\**" />
+    <None Remove="RestSpecification\XPack\**" />
+  </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.1.0-beta3-final" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
@@ -21,6 +26,5 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="RestSpecification\Core" />
-    <Folder Include="RestSpecification\XPack" />
   </ItemGroup>
 </Project>

src/ApiGenerator/Configuration/CodeConfiguration.cs

@@ -45,14 +45,8 @@ public static class CodeConfiguration
 			"autoscaling.put_autoscaling_policy.json", // experimental
 			"autoscaling.delete_autoscaling_policy.json", // experimental
 
-
-			"indices.delete_index_template.json",
-			"indices.exists_index_template.json",
-			"indices.get_index_template.json",
-			"indices.put_index_template.json",
 			"indices.simulate_index_template.json",
 			"indices.simulate_template.json",
-
 			"searchable_snapshots.stats.json",
 			"searchable_snapshots.clear_cache.json",
 			"searchable_snapshots.mount.json",
@@ -89,7 +83,8 @@ public static class CodeConfiguration
 		{
 			{ "indices.delete_index_template", "DeleteIndexTemplateV2" },
 			{ "indices.get_index_template", "GetIndexTemplateV2" },
-			{ "indices.put_index_template", "PutIndexTemplateV2" }
+			{ "indices.put_index_template", "PutIndexTemplateV2" },
+			{ "indices.exists_index_template", "IndexTemplateV2Exists" }
 		};
 
 		/// <summary>

src/Elasticsearch.Net/Api/RequestParameters/RequestParameters.Indices.cs

@@ -521,8 +521,8 @@ public bool? Local
 		}
 	}
 
-	///<summary>Request options for ExistsTemplate <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
-	public class ExistsIndexTemplateRequestParameters : RequestParameters<ExistsIndexTemplateRequestParameters>
+	///<summary>Request options for TemplateV2Exists <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
+	public class IndexTemplateV2ExistsRequestParameters : RequestParameters<IndexTemplateV2ExistsRequestParameters>
 	{
 		public override HttpMethod DefaultHttpMethod => HttpMethod.HEAD;
 		public override bool SupportsBody => false;

src/Elasticsearch.Net/ElasticLowLevelClient.Indices.cs

@@ -281,13 +281,13 @@ public Task<TResponse> AliasExistsAsync<TResponse>(string index, string name, Al
 		///<summary>HEAD on /_index_template/{name} <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
 		///<param name = "name">The name of the template</param>
 		///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
-		public TResponse ExistsTemplateForAll<TResponse>(string name, ExistsIndexTemplateRequestParameters requestParameters = null)
+		public TResponse TemplateV2ExistsForAll<TResponse>(string name, IndexTemplateV2ExistsRequestParameters requestParameters = null)
 			where TResponse : class, IElasticsearchResponse, new() => DoRequest<TResponse>(HEAD, Url($"_index_template/{name:name}"), null, RequestParams(requestParameters));
 		///<summary>HEAD on /_index_template/{name} <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
 		///<param name = "name">The name of the template</param>
 		///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
 		[MapsApi("indices.exists_index_template", "name")]
-		public Task<TResponse> ExistsTemplateForAllAsync<TResponse>(string name, ExistsIndexTemplateRequestParameters requestParameters = null, CancellationToken ctx = default)
+		public Task<TResponse> TemplateV2ExistsForAllAsync<TResponse>(string name, IndexTemplateV2ExistsRequestParameters requestParameters = null, CancellationToken ctx = default)
 			where TResponse : class, IElasticsearchResponse, new() => DoRequestAsync<TResponse>(HEAD, Url($"_index_template/{name:name}"), ctx, null, RequestParams(requestParameters));
 		///<summary>HEAD on /_template/{name} <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
 		///<param name = "name">The comma separated names of the index templates</param>

src/Nest/Descriptors.Indices.cs

@@ -388,6 +388,31 @@ protected DeleteDataStreamDescriptor(): base()
 		public DeleteDataStreamDescriptor ExpandWildcards(ExpandWildcards? expandwildcards) => Qs("expand_wildcards", expandwildcards);
 	}
 
+	///<summary>Descriptor for DeleteTemplateV2 <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
+	public partial class DeleteIndexTemplateV2Descriptor : RequestDescriptorBase<DeleteIndexTemplateV2Descriptor, DeleteIndexTemplateV2RequestParameters, IDeleteIndexTemplateV2Request>, IDeleteIndexTemplateV2Request
+	{
+		internal override ApiUrls ApiUrls => ApiUrlsLookups.IndicesDeleteTemplateV2;
+		///<summary>/_index_template/{name}</summary>
+		///<param name = "name">this parameter is required</param>
+		public DeleteIndexTemplateV2Descriptor(Name name): base(r => r.Required("name", name))
+		{
+		}
+
+		///<summary>Used for serialization purposes, making sure we have a parameterless constructor</summary>
+		[SerializationConstructor]
+		protected DeleteIndexTemplateV2Descriptor(): base()
+		{
+		}
+
+		// values part of the url path
+		Name IDeleteIndexTemplateV2Request.Name => Self.RouteValues.Get<Name>("name");
+		// Request parameters
+		///<summary>Specify timeout for connection to master</summary>
+		public DeleteIndexTemplateV2Descriptor MasterTimeout(Time mastertimeout) => Qs("master_timeout", mastertimeout);
+		///<summary>Explicit operation timeout</summary>
+		public DeleteIndexTemplateV2Descriptor Timeout(Time timeout) => Qs("timeout", timeout);
+	}
+
 	///<summary>Descriptor for DeleteTemplate <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
 	public partial class DeleteIndexTemplateDescriptor : RequestDescriptorBase<DeleteIndexTemplateDescriptor, DeleteIndexTemplateRequestParameters, IDeleteIndexTemplateRequest>, IDeleteIndexTemplateRequest
 	{
@@ -497,6 +522,33 @@ public AliasExistsDescriptor Index<TOther>()
 		public AliasExistsDescriptor Local(bool? local = true) => Qs("local", local);
 	}
 
+	///<summary>Descriptor for TemplateV2Exists <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
+	public partial class IndexTemplateV2ExistsDescriptor : RequestDescriptorBase<IndexTemplateV2ExistsDescriptor, IndexTemplateV2ExistsRequestParameters, IIndexTemplateV2ExistsRequest>, IIndexTemplateV2ExistsRequest
+	{
+		internal override ApiUrls ApiUrls => ApiUrlsLookups.IndicesTemplateV2Exists;
+		///<summary>/_index_template/{name}</summary>
+		///<param name = "name">this parameter is required</param>
+		public IndexTemplateV2ExistsDescriptor(Name name): base(r => r.Required("name", name))
+		{
+		}
+
+		///<summary>Used for serialization purposes, making sure we have a parameterless constructor</summary>
+		[SerializationConstructor]
+		protected IndexTemplateV2ExistsDescriptor(): base()
+		{
+		}
+
+		// values part of the url path
+		Name IIndexTemplateV2ExistsRequest.Name => Self.RouteValues.Get<Name>("name");
+		// Request parameters
+		///<summary>Return settings in flat format (default: false)</summary>
+		public IndexTemplateV2ExistsDescriptor FlatSettings(bool? flatsettings = true) => Qs("flat_settings", flatsettings);
+		///<summary>Return local information, do not retrieve the state from master node (default: false)</summary>
+		public IndexTemplateV2ExistsDescriptor Local(bool? local = true) => Qs("local", local);
+		///<summary>Explicit operation timeout for connection to master node</summary>
+		public IndexTemplateV2ExistsDescriptor MasterTimeout(Time mastertimeout) => Qs("master_timeout", mastertimeout);
+	}
+
 	///<summary>Descriptor for TemplateExists <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
 	public partial class IndexTemplateExistsDescriptor : RequestDescriptorBase<IndexTemplateExistsDescriptor, IndexTemplateExistsRequestParameters, IIndexTemplateExistsRequest>, IIndexTemplateExistsRequest
 	{
@@ -876,6 +928,34 @@ public GetFieldMappingDescriptor<TDocument> Index<TOther>()
 		public GetFieldMappingDescriptor<TDocument> Local(bool? local = true) => Qs("local", local);
 	}
 
+	///<summary>Descriptor for GetTemplateV2 <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
+	public partial class GetIndexTemplateV2Descriptor : RequestDescriptorBase<GetIndexTemplateV2Descriptor, GetIndexTemplateV2RequestParameters, IGetIndexTemplateV2Request>, IGetIndexTemplateV2Request
+	{
+		internal override ApiUrls ApiUrls => ApiUrlsLookups.IndicesGetTemplateV2;
+		///<summary>/_index_template</summary>
+		public GetIndexTemplateV2Descriptor(): base()
+		{
+		}
+
+		///<summary>/_index_template/{name}</summary>
+		///<param name = "name">Optional, accepts null</param>
+		public GetIndexTemplateV2Descriptor(Name name): base(r => r.Optional("name", name))
+		{
+		}
+
+		// values part of the url path
+		Name IGetIndexTemplateV2Request.Name => Self.RouteValues.Get<Name>("name");
+		///<summary>A pattern that returned template names must match</summary>
+		public GetIndexTemplateV2Descriptor Name(Name name) => Assign(name, (a, v) => a.RouteValues.Optional("name", v));
+		// Request parameters
+		///<summary>Return settings in flat format (default: false)</summary>
+		public GetIndexTemplateV2Descriptor FlatSettings(bool? flatsettings = true) => Qs("flat_settings", flatsettings);
+		///<summary>Return local information, do not retrieve the state from master node (default: false)</summary>
+		public GetIndexTemplateV2Descriptor Local(bool? local = true) => Qs("local", local);
+		///<summary>Explicit operation timeout for connection to master node</summary>
+		public GetIndexTemplateV2Descriptor MasterTimeout(Time mastertimeout) => Qs("master_timeout", mastertimeout);
+	}
+
 	///<summary>Descriptor for GetMapping <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-get-mapping.html</para></summary>
 	public partial class GetMappingDescriptor<TDocument> : RequestDescriptorBase<GetMappingDescriptor<TDocument>, GetMappingRequestParameters, IGetMappingRequest>, IGetMappingRequest
 	{
@@ -1119,6 +1199,33 @@ public PutAliasDescriptor Index<TOther>()
 		public PutAliasDescriptor Timeout(Time timeout) => Qs("timeout", timeout);
 	}
 
+	///<summary>Descriptor for PutTemplateV2 <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html</para></summary>
+	public partial class PutIndexTemplateV2Descriptor : RequestDescriptorBase<PutIndexTemplateV2Descriptor, PutIndexTemplateV2RequestParameters, IPutIndexTemplateV2Request>, IPutIndexTemplateV2Request
+	{
+		internal override ApiUrls ApiUrls => ApiUrlsLookups.IndicesPutTemplateV2;
+		///<summary>/_index_template/{name}</summary>
+		///<param name = "name">this parameter is required</param>
+		public PutIndexTemplateV2Descriptor(Name name): base(r => r.Required("name", name))
+		{
+		}
+
+		///<summary>Used for serialization purposes, making sure we have a parameterless constructor</summary>
+		[SerializationConstructor]
+		protected PutIndexTemplateV2Descriptor(): base()
+		{
+		}
+
+		// values part of the url path
+		Name IPutIndexTemplateV2Request.Name => Self.RouteValues.Get<Name>("name");
+		// Request parameters
+		///<summary>User defined reason for creating/updating the index template</summary>
+		public PutIndexTemplateV2Descriptor Cause(string cause) => Qs("cause", cause);
+		///<summary>Whether the index template should only be added if new or can also replace an existing one</summary>
+		public PutIndexTemplateV2Descriptor Create(bool? create = true) => Qs("create", create);
+		///<summary>Specify timeout for connection to master</summary>
+		public PutIndexTemplateV2Descriptor MasterTimeout(Time mastertimeout) => Qs("master_timeout", mastertimeout);
+	}
+
 	///<summary>Descriptor for PutMapping <para>https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-put-mapping.html</para></summary>
 	public partial class PutMappingDescriptor<TDocument> : RequestDescriptorBase<PutMappingDescriptor<TDocument>, PutMappingRequestParameters, IPutMappingRequest<TDocument>>, IPutMappingRequest<TDocument>
 	{