Add trace method to servicesHost

[onigoetz]

Expected Behaviour

Adding "traceResolution": true, to tsconfig.json should display logs of how imported modules are resolved. It's very useful for debugging.

Actual Behaviour

Setting traceResolution to true makes no difference in the output. The cause is that the declared ServicesHost doesn't provide a trace method.

Can we add a method that will output those informations ?

Normal output is like:

Module 'http' was resolved as locally declared ambient module in file '/home/sgoetz/workspace/foundation/ts-project/server-war/src/main/frontend/node_modules/@types/node/index.d.ts'.

Steps to Reproduce the Problem

Add "traceResolution": true, to your compilerOptions in tsconfig.json and see that nothing is different in your build.

Location of a Minimal Repository that Demonstrates the Issue.

I don't have one, but it works on any project using ts-loader

[flyon]

yes, I confirm. Right now I have a module that cannot be found even though its installed under @types, would like to debug with traceResolution, but neither in tsconfig.json nor through ts-loader -> compilerOptions overwrite works

[johnnyreilly]

I'm open to this being added. Would you like to submit a speculative PR and we can iterate on that?

[onigoetz]

Sure I can do that

[onigoetz]

Closing now that this was merged in #721