'podman-compose build' builds replicate images for each service in docker-compose.yaml that share a common image.

[Josh Meehl]

Summary
When executing podman-compose build, a build is performed for each service in the docker-compose.yaml that share a common image.

This is not an issue in v1.0.6.

This was reproduced on the latest commit on the main branch (#16cbcf4)

Steps to reproduce

1. Directory setup: project_directory/docker, which contains docker-compose.yaml, .env, Dockerfile
2. Define docker-compose.yaml and Dockerfile (below)
3. Execute podman-compose build from project_directory/docker

docker-compose.yaml:

x-common:
  &common
  image: project/dummy:0.1.0
  build:
    context: project_directory/docker
    dockerfile: Dockerfile

services:
  service1:
    <<: *common
    entrypoint: /bin/sh
    command: -c "while :; do echo 'Hello, World!'; sleep 3600; done"

  service2:
    <<: *common
    entrypoint: /bin/sh
    command: -c "while :; do echo 'Hello, again!': sleep 3600; done"

  service3:
    <<: *common
    entrypoint: /bin/sh
    command: -c "while :; do echo 'Goodbye, World!'; sleep 3600; done"

Dockerfile:

FROM busybox:latest
RUN echo "hello world"

Expected behavior
A clear and concise description of what you expected to happen.

Actual behavior
Each service with a common images has a separate build

Output

$ podman-compose version
podman-compose version 1.1.0
podman version 4.9.4-rhel
podman --version 
podman version 4.9.4-rhel

$ podman-compose build
STEP 1/2: FROM busybox:latest
STEP 1/2: FROM busybox:latest
STEP 1/2: FROM busybox:latest
STEP 2/2: RUN echo "hello world"
STEP 2/2: RUN echo "hello world"
STEP 2/2: RUN echo "hello world"
hello world
hello world
hello world
COMMIT project/dummy:0.0.1
COMMIT project/dummy:0.0.1
COMMIT project/dummy:0.0.1
--> 5a91e4e65d80
Successfully tagged localhost/project/dummy:0.0.1
5a91e4e65d803eccc851a72c9f835cc99492f851ad292d87d2723b68445ab2aa
--> 68b7cabbf235
Successfully tagged localhost/project/dummy:0.0.1
68b7cabbf235bc4cdeb2eb7c183ad6211ce165a7a8f0356e4b199e35df98c342
--> bb2e534fb9bd
Successfully tagged localhost/project/dummy:0.0.1
bb2e534fb9bd29df004dc3a4bc0a4cbcf9788e7278cff478b487a79f34da8383

$ podman images
REPOSITORY                    TAG         IMAGE ID      CREATED         SIZE
localhost/project/dummy    0.0.1       bb2e534fb9bd  3 minutes ago   1.5 MB
<none>                        <none>      68b7cabbf235  3 minutes ago   1.5 MB
<none>                        <none>      5a91e4e65d80  3 minutes ago   1.5 MB

$ podman-compose up
...
[service3] | Goodbye, World!
[service1] | Hello, World!
[service2] | Hello, again!

Environment:

• OS: Linux
• podman version: 4.9.4-rhel
• podman compose version: 1.1.0 (#16cbcf4)

Additional Info:
I have a work around, which is to define a 'build-dummy' service, and move the build info there:

docker-compose.yaml:

x-common:
  &common
  image: project/dummy:0.0.2
 
services:
  build_dummy:
    <<: *common
    build:
      context: project_directory/docker
      dockerfile: Dockerfile
     profiles:
      - build
     
  service1:
    <<: *common
     ...

$ podman-compose build
STEP 1/2: FROM busybox:latest
STEP 2/2: RUN echo "hello world"
--> Using cache 5a91e4e65d803eccc851a72c9f835cc99492f851ad292d87d2723b68445ab2aa
COMMIT project/dummy:0.0.2
--> 5a91e4e65d80
Successfully tagged localhost/project/dummy:0.0.2
5a91e4e65d803eccc851a72c9f835cc99492f851ad292d87d2723b68445ab2aa

$ podman images
REPOSITORY                    TAG         IMAGE ID      CREATED         SIZE
localhost/project/dummy    0.0.2       5a91e4e65d80  3 minutes ago   1.5 MB

$ podman-compose up
...
[service3] | Goodbye, World!
[service1] | Hello, World!
[service2] | Hello, again!