MAUI app generated from template should be instantly compilable on Linux

[Ghostbird]

Description

Currently when I generate a new MAUI app, I first need to edit the project file before it can be built. It would be nice if it delivered an app that could be built immediately.

Currently when I do this:

dotnet new maui -n testapp
dotnet build testapp

I get the error

The project depends on the following workload packs that do not exist in any of the workloads available in this installation: Microsoft.ios.Sdk.net7
The project depends on the following workload packs that do not exist in any of the workloads available in this installation: Microsoft.maccatalyst.Sdk.net7

Then I need to move net7.0-ios and net7.0-maccatalyst to a conditional:

<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('OSX'))">$(TargetFrameworks);net7.0-ios;net7.0-maccatalyst</TargetFrameworks>

Since (AFAIK) building for iOS and Mac is only supported on MacOS. I'm using Debian, and it's clearly not supported there.

Public API Changes

None as far as I know

Intended Use-Case

dotnet new maui -n testapp
dotnet build testapp

Should build successfully

[Ghostbird]

If my take on this is correct, and MAUI maintainers are open to a change that makes this default, I can make a PR for it.

[drasticactions]

You can build iOS/Catalyst projects on Windows too, so your conditional would need to be Linux specific or need to be not Windows nor MacOS.

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[tom-b-iodigital]

dotnet build -f:net7.0-android testapp should work

[jfversluis]

If my take on this is correct, and MAUI maintainers are open to a change that makes this default, I can make a PR for it.

Before we do that, let's think this through: what would be the change that makes the most sense here? As mentioned, you can build macOS/iOS apps on Windows, so we can't just limit that to only be macOS.

What is the change you want to implement here?

As much as I want to make this better for people building on Linux, my first priority would be to not break the other audiences, as they are probably in the majority.

[Ghostbird]

Yeah, I agree that it shouldn't break anything. The only goal should be to have the template be less broken.

[Matheos96]

I second this proposal. I just created a fresh maui-blazor project in Linux and was faced with the same "issue". If the only platform unable to compile iOS and macOS apps is Linux, could the conditional target not simply be something like Condition="!$([MSBuild]::IsOSPlatform('Linux'))" (don't quote me on the negation syntax... 😄 )