Support --interactive for templates behind private nuget feed

1. For dotnet new -i. To use install a template behind private nuget feed the user cannot specify nuget feed in the command line . The user need to set the nuget feed in the global nuget config.

2. After adding a private nuget feed, if the feed need auth. The user will see the following error

/Users/williamli/Documents/cli/artifacts/tmp/Debug/dotnet/sdk/3.0.100-preview-009752/NuGet.targets(114,5): warning : The plugin credential provider could not acquire credentials. Authentication may require manual action. Consider re-running the command with --interactive for `dotnet`, /p:NuGetInteractive="true" for MSBuild or removing the -NonInteractive switch for `NuGet` [/Users/williamli/.templateengine/dotnetcli/v3.0.100-preview-009752/scratch/restore.csproj]

However, --interactive command is not available for dotnet new

To repro add my private feed to ~/.nuget/NuGet/NuGet.Config

<add key="testingnugetauth" value="https://williamleewul.pkgs.visualstudio.com/_packaging/testingnugetauth/nuget/v3/index.json" />

And run dotnet new -i wul.DotNet.Common.ItemTemplates

1. If the template uses a private package in another feed. The restore will fail due to no --interactive is passed to subsequence restore.

related to https://github.com/dotnet/templating/issues/1545 but now we have --interactive

[allysonjoses]

Any update on this issue?

[Boruc04]

Something like that works for us:

1. Download the Credentials Provider installation script - link

2. Open the PowerShell console and run the installation script with the -AddNetfx switch

   .\installcredprovider.ps1 -AddNetfx
   

3. Navigate to %userprofile%\.nuget\plugins\netfx\CredentialProvider.Microsoft and open Command Prompt there.

4. Run the following command:

   CredentialProvider.Microsoft.exe -U <your nuget source>
   

5. Follow the instructions printed to the console window: Open microsoft.com/devicelogin, enter the code and login to the account.

6. Run the following command to install the template to your dotnet cli templates:

   dotnet new -i <template name> --nuget-source <your nuget source>
   

Hope this will help 😃