[suggestion] "Mixed" moduleResolution mode

[tolemac]

I'm happy about to have moduleResolution option but I think that node and classic are insufficient.

I would like to have a mixed option. When you are using node_modules you have to use node option but I continue having custom libraries in development that I use in my projects.

This was my folder estructure:

Root
    | -tolemac
    |   |- helper.ts
    | -app
        |- customer.ts
        |- customer-details.ts
        |- invoice.ts
        |- delivery-note.ts

I used --modeResolution: "classic" and I have in customer.ts:

import {helperFunction} from "tolemac/helper";
...

Then I decided to make a subfolder for each section on my domain:

Root
    | -tolemac
    |   |- helper.ts
    | -app
        |- customers
        |    |- customer.ts
        |    |- customer-details.ts
        |- invoices
             |- invoice.ts
             |- delivery-note.ts

And all works fine.

Then I've started to use some node modules like es6-shims and others, then I have changed the options to --moduleResolution: "node".
I can load node_modules, but all my files in my app have failed on compile, ts don't found tolemac/helper module ...

I have to change customer.ts and all others to:

import {helperFunction} from "../../tolemac/helper";
...

Its ok, but if do I decide to make other change??

Perhaps the best option would be to have a "--moduleRoot" option where you can set an array with the paths to the modules and typescript would search modules in these paths with the same order. For example:

    --moduleRoot: ["node_modules", "."],

Typescript would look for modules on "node_modules" and if not found then search in the current.

The routes would be relatives to "tsconfig.json", this is important, I have folder structures like:

Root
    | -app1
    |   | -tolemac
    |   |   |- helper.ts
    |   |- customers
    |   |    |- customer.ts
    |   |    |- customer-details.ts
    |   |- invoices
    |   |    |- invoice.ts
    |   |    |- delivery-note.ts
    |   |- tsconfig.json **
    | -app2
    |   |- customers
    |   |    |- customer.ts
    |   |    |- customer-details.ts
    |   |- invoices
    |   |    |- invoice.ts
    |   |    |- delivery-note.ts
    |   |- tsconfig.json **
    |- node_modules
    |- package.json

Then my options would be:

--moduleRoot: ["../node_modules", "."],

For both tsconfig.json files.

[mhegazy]

consider using paths property in your tsconfig.json. Path mapping module resolution is a new feature added, you can find it in typescript@next.
more documentation can be found in https://github.com/Microsoft/TypeScript-Handbook/blob/release-2.0/pages/Module%20Resolution.md#additional-module-resolution-flags

[mhegazy]

I believe your scenario should be handled by only using "baseUrl": "./". give it a try, and let us know if this is not the case.

[tolemac]

Yes! Its works, nice.

I have put "baseUrl" as you suggest.

Thanks.

[mhegazy]

great. thanks for getting back on this.