VSCE should automate publishing the same bits for multiple platforms at once

[joaomoreno]

From @isidorn

Based on feedback from @aeschli the --target should be more user friendly so extension publishers can more easily publish multiple platforms.
Thus I suggest that the --target also supports specifying an array, such that the user can list multiple platforms.

Other ideas from @aeschli
Specify the list of platforms in my manifest.

[wwlorey]

This would be really useful in the Azure Storage Extension. We are interested in making use of the platform-specific extension feature but only care about windows/darwin/linux and not necessarily the underlying platform architecture.

[joaomoreno]

@wwlorey What's the specific reason you'd like to use this feature? Are there any binaries?

[wwlorey]

Yes we're using platform specific azcopy packages

[felipecrs]

The only problem with this approach is that, if new platforms gets added, extension authors will have to keep their list in sync too, even though the extension would be generic for any platform.

Ideally VS Marketplace should support and deal with generic platform, so that we don't add this burden to extension developers.

[joaomoreno]

That's fantastic. So, I think what you want is just platform specific extension support. We released that already a month ago: https://code.visualstudio.com/api/working-with-extensions/publishing-extension#platformspecific-extensions

This issue is about a specific feature within that feature.

[felipecrs]

PS: microsoft/vsmarketplace#219