TLS 1.2 Support When Installing PackageManagement Module (#1315)

* the powershell command to install the update should include the command to use TLS1.2

* Update src/PowerShellEditorServices/Services/PowerShellContext/Handlers/GetVersionHandler.cs

Co-authored-by: Tyler James Leonhardt <tylerl0706@gmail.com>

* Enhanced package update failure message on line 143 and added Repository option to Install-Module command

* Revert "Enhanced package update failure message on line 143 and added Repository option to Install-Module command"

This reverts commit 7975481.

* Enhanced error message while installing PackageManagement

* Repository argument put outside of single quote by mistake.

Co-authored-by: Serkan ZENGİN <szengin@ssb.gov.tr>
Co-authored-by: Tyler James Leonhardt <tylerl0706@gmail.com>

Author: 3 people

src/PowerShellEditorServices/Services/PowerShellContext/Handlers/GetVersionHandler.cs

@@ -82,7 +82,7 @@ private async Task CheckPackageManagement()
             foreach (PSModuleInfo module in await _powerShellContextService.ExecuteCommandAsync<PSModuleInfo>(getModule))
             {
                 // The user has a good enough version of PackageManagement
-                if(module.Version >= s_desiredPackageManagementVersion)
+                if (module.Version >= s_desiredPackageManagementVersion)
                 {
                     break;
                 }
@@ -100,7 +100,7 @@ private async Task CheckPackageManagement()
                 {
                     Message = "You have an older version of PackageManagement known to cause issues with the PowerShell extension. Would you like to update PackageManagement (You will need to restart the PowerShell extension after)?",
                     Type = MessageType.Warning,
-                    Actions = new []
+                    Actions = new[]
                     {
                         new MessageActionItem
                         {
@@ -118,7 +118,7 @@ private async Task CheckPackageManagement()
                 {
                     StringBuilder errors = new StringBuilder();
                     await _powerShellContextService.ExecuteScriptStringAsync(
-                        "powershell.exe -NoLogo -NoProfile -Command 'Install-Module -Name PackageManagement -Force -MinimumVersion 1.4.6 -Scope CurrentUser -AllowClobber'",
+                        "powershell.exe -NoLogo -NoProfile -Command '[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; Install-Module -Name PackageManagement -Force -MinimumVersion 1.4.6 -Scope CurrentUser -AllowClobber -Repository PSGallery'",
                         errors,
                         writeInputToHost: true,
                         writeOutputToHost: true,
@@ -140,7 +140,7 @@ await _powerShellContextService.ExecuteScriptStringAsync(
                         _languageServer.Window.ShowMessage(new ShowMessageParams
                         {
                             Type = MessageType.Error,
-                            Message = "PackageManagement update failed. Please run the following command in a new Windows PowerShell session and then restart the PowerShell extension: `Install-Module PackageManagement -Force -AllowClobber -MinimumVersion 1.4.6`"
+                            Message = "PackageManagement update failed. This might be due to PowerShell Gallery using TLS 1.2. More info can be found at https://aka.ms/psgallerytls"
                         });
                     }
                 }