PrecompilationWebSite has troubles building in VS

[dougbu]

• no problems if site built on its own
• 10 errors if Microsoft.AspNet.Mvc.FunctionalTests or solution built
  • 8 messages are "Cannot resolve TagHelper containing assembly 'PrecompilationWebSite'. Error: Could not load file or assembly 'Microsoft.AspNet.Mvc.Core' or one of its dependencies. The system cannot find the file specified."
  • 2 messages are "Encountered an unexpected error when attempting to resolve tag helper directive '@addTagHelper' with value '*, Microsoft.AspNet.Mvc.TagHelpers'. Error: Could not load file or assembly 'Microsoft.AspNet.Mvc.Core' or one of its dependencies. The system cannot find the file specified."

[danroth27]

@davidfowl @Eilon What's the plan for precompilation all up?

[dougbu]

See also aspnet/RazorTooling#10

[dougbu]

Basically there's two ways to go from here:

1. Fix this bug or TagHelper tooling does not work with pre-compilation enabled. RazorTooling#10 -- either should get Razor precompilation working reliably across the MVC repo. Then revert commit 3fbead0.
2. Decide Razor precompilation is unstable and will take a significant (unbudgeted) effort to get working reliably. Then remove our support for this feature, along with the PrecompilationWebSite.

[danroth27]

#2551