config --no-interpolate not merging files.

[mellester]

Description of the issue

I use docker-compose to merge mutiple configs into one single file
example

docker-compose -f docker/docker-compose.1base.yml  \
-f docker/docker-compose.2reddis.yml \
config > docker-compose.yml 

This works fine

When using

docker-compose -f docker/docker-compose.1base.yml  \
-f docker/docker-compose.2reddis.yml \
config --no-interpolate > docker-compose.yml

I get a output of

ERROR: The Compose file './docker/docker-compose.2reddis.yml' is invalid because:
services.redis.ports contains an invalid type, it should be a number, or an object

Context information (for bug reports)

Output of docker-compose version

docker-compose version 1.28.5, build c4eb3a1f
docker-py version: 4.4.4
CPython version: 3.7.10
OpenSSL version: OpenSSL 1.1.0l  10 Sep 2019

Output of docker version

Client: Docker Engine - Community
 Cloud integration: 1.0.9
 Version:           20.10.5
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        55c4c88
 Built:             Tue Mar  2 20:17:50 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.5
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       363e9a8
  Built:            Tue Mar  2 20:15:47 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Output of docker-compose config
(Make sure to add the relevant -f and other flags)

services:
  redis:
    image: redis:alpine
    ports:
    - published: 6379
      target: 6379
version: '3'

Steps to reproduce the issue

create a file like

#docker-compose.2reddis-copy.yml
version: '3'
services:
    redis:
        image: 'redis:alpine'
        ports:
            - '${FORWARD_REDIS_PORT:-6379}:6379'

run docker-compose -f docker-compose.2reddis-copy.yml config --no-interploate

Observed result

ERROR: The Compose file 'docker-compose.2reddis-copy.yml' is invalid because:
services.redis.ports contains an invalid type, it should be a number, or an object

Expected result

services:
  redis:
    image: redis:alpine
    ports:
    - published: ${FORWARD_REDIS_PORT:-6379}
      target: 6379
version: '3'

Additional information

OS version / distribution, docker-compose install method, etc.
uname -a
Linux DESKTOP-L093T8U 5.4.72-microsoft-standard-WSL2 #1 SMP Wed Oct 28 23:40:43 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

WSL2

[o-sokolova]

Hi! I want to take this issue.

[o-sokolova]

This issue refers to #7964 It is not global --no-interpolate mistake. So @mellester please add your 👍 to that issue and I'll continue my investigation there

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it had not recent activity during the stale period.