Volume mount via docker-compose file

[lox]

I can't for the life of me figure out how to translate the example of mounting a volume from the macOS host to the docker container to work in docker-compose.yml:

docker run -it -v C:$(pwd):C:$(pwd) microsoft/windowsservercore powershell

I get errors pretty much every way I try it in a docker-compose file that I am running via macOS (docker-compose 1.16). Any ideas?

[lox]

For instance, this works fine:

docker run --rm -it -v C:\\Users\\lachlan\\.ssh:C:\\ssh -w C:\\ssh microsoft/windowsservercore powershell

But then I try that in docker-compose:

version: "3.2"

services:
  test:
    image: microsoft/windowsservercore
    volumes:
      - C:\\Users\\lachlan\\.ssh:C:\\ssh

and I get:

ERROR: Volume C:\\Users\\lachlan\\.ssh:C:\\ssh has incorrect format, should be external:internal[:mode]

[lox]

I posted a compose issue here: docker/compose#5371

[StefanScherer]

Closing this, discussion to follow is in 5371 and a first PR in 5363