Fix profile loading and $PROFILE variable

Author: rjmholt

src/PowerShellEditorServices/Services/PowerShell/Utility/PowerShellExtensions.cs

@@ -9,7 +9,6 @@
 using Microsoft.PowerShell.EditorServices.Hosting;
 using Microsoft.PowerShell.EditorServices.Utility;
 using System.Collections.Generic;
-using System.IO;
 
 namespace Microsoft.PowerShell.EditorServices.Services.PowerShell.Utility
 {
@@ -164,14 +163,24 @@ public static void SetCorrectExecutionPolicy(this PowerShell pwsh, ILogger logge
 
         public static void LoadProfiles(this PowerShell pwsh, ProfilePathInfo profilePaths)
         {
-            var profileVariable = new PSObject();
+            // Per the documentation, "the `$PROFILE` variable stores the path to the 'Current User,
+            // Current Host' profile. The other profiles are saved in note properties of the
+            // `$PROFILE` variable. Its type is `String`.
+            //
+            // https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_profiles?view=powershell-7.1#the-profile-variable
+            var profileVariable = PSObject.AsPSObject(profilePaths.CurrentUserCurrentHost);
 
-            pwsh.AddProfileMemberAndLoadIfExists(profileVariable, nameof(profilePaths.AllUsersAllHosts), profilePaths.AllUsersAllHosts)
-                .AddProfileMemberAndLoadIfExists(profileVariable, nameof(profilePaths.AllUsersCurrentHost), profilePaths.AllUsersCurrentHost)
-                .AddProfileMemberAndLoadIfExists(profileVariable, nameof(profilePaths.CurrentUserAllHosts), profilePaths.CurrentUserAllHosts)
-                .AddProfileMemberAndLoadIfExists(profileVariable, nameof(profilePaths.CurrentUserCurrentHost), profilePaths.CurrentUserCurrentHost);
+            var psCommand = new PSCommand()
+                .AddProfileLoadIfExists(profileVariable, nameof(profilePaths.AllUsersAllHosts), profilePaths.AllUsersAllHosts)
+                .AddProfileLoadIfExists(profileVariable, nameof(profilePaths.AllUsersCurrentHost), profilePaths.AllUsersCurrentHost)
+                .AddProfileLoadIfExists(profileVariable, nameof(profilePaths.CurrentUserAllHosts), profilePaths.CurrentUserAllHosts)
+                .AddProfileLoadIfExists(profileVariable, nameof(profilePaths.CurrentUserCurrentHost), profilePaths.CurrentUserCurrentHost);
 
+            // NOTE: This must be set before the profiles are loaded.
             pwsh.Runspace.SessionStateProxy.SetVariable("PROFILE", profileVariable);
+
+            pwsh.InvokeCommand(psCommand);
+
         }
 
         public static void ImportModule(this PowerShell pwsh, string moduleNameOrPath)
@@ -200,22 +209,6 @@ public static string GetErrorString(this PowerShell pwsh)
             return sb.ToString();
         }
 
-        private static PowerShell AddProfileMemberAndLoadIfExists(this PowerShell pwsh, PSObject profileVariable, string profileName, string profilePath)
-        {
-            profileVariable.Members.Add(new PSNoteProperty(profileName, profilePath));
-
-            if (File.Exists(profilePath))
-            {
-                var psCommand = new PSCommand()
-                    .AddScript(profilePath, useLocalScope: false)
-                    .AddOutputCommand();
-
-                pwsh.InvokeCommand(psCommand);
-            }
-
-            return pwsh;
-        }
-
         private static StringBuilder AddErrorString(this StringBuilder sb, ErrorRecord error, int errorIndex)
         {
             sb.Append("Error #").Append(errorIndex).Append(':').AppendLine()

src/PowerShellEditorServices/Utility/PSCommandExtensions.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using System;
+using System.IO;
 using System.Linq.Expressions;
 using System.Management.Automation;
 using System.Management.Automation.Runspaces;
@@ -61,6 +62,22 @@ public static PSCommand MergePipelineResults(this PSCommand psCommand)
             return psCommand;
         }
 
+        public static PSCommand AddProfileLoadIfExists(this PSCommand psCommand, PSObject profileVariable, string profileName, string profilePath)
+        {
+            // This path should be added regardless of the existence of the file.
+            profileVariable.Members.Add(new PSNoteProperty(profileName, profilePath));
+
+            if (File.Exists(profilePath))
+            {
+                psCommand
+                    .AddCommand(profilePath, useLocalScope: false)
+                    .AddOutputCommand()
+                    .AddStatement();
+            }
+
+            return psCommand;
+        }
+
         /// <summary>
         /// Get a representation of the PSCommand, for logging purposes.
         /// </summary>