"exclude" with glob does not exclude folders

[timocov]

TypeScript Version: 2.1.4 / nightly (2.2.0-dev.20161208)

Steps to reproduce:

1. Create empty folder and install TypeScript 2.1.4 (or @next)

mkdir test && cd test
npm install typescript@2.1.4

2. Create empty tsconfig.json

./node_modules/.bin/tsc --init

3. Add "exclude" to tsconfig.json like this:

"exclude": ["**/node_modules"]

4. Create empty ts file:

touch test.ts

5. Run the compiler

./node_modules/.bin/tsc

Expected behavior:
Compile successfully.

Actual behavior:
A lot of errors in node_modules/typescript folder

The same source code compiles fine on TypeScript 2.1.1.

More tests:
If I change "exclude" to ["node_modules"] the compilation passes without errors. But if I place "node_modules" in a sub-folder it is not excluded neither by ["node_modules"] nor by ["**/node_modules"] and it leads to errors during the compilation.

[mhegazy]

use "exclude": ["**/node_modules/*"] instead.

[timocov]

@mhegazy Thanks!

[wclr]

Created this #12824 to find out which behaviour is consistent and it should be documented carefully.

[mjbvz]

@rbuckton We've seen a number of reports of this issue on the VSCode side. I'm planning to update our documentation to use the "exclude": ["**/node_modules/*"] pattern

Can we please look into this for TS 2.5 as well