Added experimental completer

Author: erwinvanhunen

src/Commands/Base/Completers/ListNameCompleter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Management.Automation;
+using System.Management.Automation.Language;
+using Microsoft.SharePoint.Client;
+
+namespace PnP.PowerShell.Commands.Base.Completers
+{
+     public sealed class ListNameCompleter : IArgumentCompleter
+    {
+        public IEnumerable<CompletionResult> CompleteArgument(string commandName, string parameterName, string wordToComplete, CommandAst commandAst, IDictionary fakeBoundParameters)
+        {
+            IEnumerable<List> result = PnPConnection.Current.Context.LoadQuery(PnPConnection.Current.Context.Web.Lists.Include(list => list.Title));
+            PnPConnection.Current.Context.ExecuteQueryRetry();
+            foreach (var list in result.Where(l => l.Title.StartsWith(wordToComplete, StringComparison.InvariantCultureIgnoreCase)))
+            {
+                yield return new CompletionResult(list.Title);
+            }
+
+        }     
+    }
+}

src/Commands/Lists/GetList.cs

@@ -5,6 +5,14 @@
 using System;
 using Resources = PnP.PowerShell.Commands.Properties.Resources;
 using PnP.PowerShell.Commands.Attributes;
+using System.Collections.Generic;
+using System.Management.Automation.Language;
+using System.Collections;
+using PnP.Core.Services;
+using PnP.PowerShell.Commands.Base;
+using System.Linq;
+using AngleSharp.Dom;
+using PnP.PowerShell.Commands.Base.Completers;
 
 namespace PnP.PowerShell.Commands.Lists
 {
@@ -21,15 +29,15 @@ namespace PnP.PowerShell.Commands.Lists
     [RequiredApiDelegatedPermissions("sharepoint/AllSites.FullControl")]
     public class GetList : PnPWebRetrievalsCmdlet<List>
     {
-        [Parameter(Mandatory = false, ValueFromPipeline = true, Position = 0)]
-        public ListPipeBind Identity;
+        [Parameter(Mandatory = false, ValueFromPipeline = true, Position = 0), ArgumentCompleter(typeof(ListNameCompleter))]
+        public ListPipeBind Identity { get; set; }
 
         [Parameter(Mandatory = false)]
         public SwitchParameter ThrowExceptionIfListNotFound;
 
         protected override void ExecuteCmdlet()
         {
-            DefaultRetrievalExpressions = new Expression<Func<List, object>>[] { l => l.Id, l => l.BaseTemplate, l => l.OnQuickLaunch, l => l.DefaultViewUrl, l => l.Title, l => l.Hidden, l => l.RootFolder.ServerRelativeUrl };
+            DefaultRetrievalExpressions = [l => l.Id, l => l.BaseTemplate, l => l.OnQuickLaunch, l => l.DefaultViewUrl, l => l.Title, l => l.Hidden, l => l.RootFolder.ServerRelativeUrl];
 
             if (Identity != null)
             {
@@ -52,3 +60,4 @@ protected override void ExecuteCmdlet()
         }
     }
 }
+