Add support to pass env-file to docker compose run

[KoditkarVedant]

What I did This pull request adds support to pass in --env-file to docker compose run command.

Behavior of the option: If you pass env-file from CLI it overrides the env-files provided in docker-compose.yaml config.

Related issue #8379

(not mandatory) A picture of a cute animal, if possible in relation with what you did

[ndeloof]

command documentation also need to be updated to reflect this new flag: https://github.com/docker/compose/blob/v2/docs/reference/docker_compose_run.yaml

[KoditkarVedant]

@ndeloof Looks like there is bug in the implementation. It isn't working as expected. I think when we parse the compose config files at that time only the env_file mentioned in it gets parsed. because when I see the service.Environment it was already populated with the key=value mentioned in the env_file. So my understanding that just replacing the service.EnvFile will work is not true.

I'll just put back this PR in draft as it is not ready for merge.

[ndeloof]

The main issue I see adding support for compose run --env-file ... to set container environment from a file (which would make sense to align with docker run ...) is that this will introduce confusion with the top-level --env-file used to override .env file used to interpolate variables. i.e. docker compose --env-file xx run is a distinct thing vs docker compose run --env-file xx I'm not sure how we could address this UX issue. Any thoughts @glours @ulyssessouza @thaJeztah ?

[ulyssessouza]

Same for me... The UX doesn't help... And specially because the new one is an array and the root command one is a single file.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.89%. Comparing base (d47f0f3) to head (bfb8c20). Report is 1239 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9169   +/-   ##
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  Coverage   73.89%   73.89%           
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  Files           2        2           
  Lines         272      272           
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  Hits          201      201           
  Misses         60       60           
  Partials       11       11           

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[stale[bot]]

This issue has been automatically marked as not stale anymore due to the recent activity.

[stale[bot]]

This issue has been automatically marked as not stale anymore due to the recent activity.

[stale[bot]]

This issue has been automatically marked as not stale anymore due to the recent activity.

[ndeloof]

I cherry-picked your code into https://github.com/docker/compose/pull/12626