Multiple --env-file?

[leppaott]

docker-compose --env-file=.env --env-file=.custom_env up -d
Doesn't seem to work but docker-run takes in multiple --env-file? I'd like to merge two env files and now only option seems to be: to include all variables in one env file.

[elovin]

This would be a very useful feature, because if you have multiple docker-compose files you might want to have some development only env variables to extend/overwrite the env variables for the base docker-compose file.

E.g. I expose some ports in the docker-compose.dev.yml that are used for debugging, I would like to make them configurable through env variables defined in a .dev.env file.

@leppaott
I'm using export $(xargs < .dev.env) before running docker-compose up, take a look at this stackoverflow question.
This can however only extend the environment variables from the --env-file file since it runs before docker-compose, so it can not be used to overwrite environment variables.

[ndeloof]

docker run --env-file option doesn't map to docker-compose --env-file but to compose.yaml service.env_file.

That being said, for an homogeneous UX it would indeed make sense to support --env-file as a multi-value flag.

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[CodeAnthem]

so is there any progress on this? It would make sense to support multiple .env files. without attaching them to every single service manually.

[ndeloof]

@averon420 this is partially supported thanks to compose-spec/compose-go#348
just need to update the flag definition so it can be used N times

[CodeAnthem]

@averon420 this is partially supported thanks to compose-spec/compose-go#348 just need to update the flag definition so it can be used N times

Sounds awesome, thanks! Sadly, I have no idea what I have to do, to get it to working. Can you give me any hint?

[ndeloof]

You can't yet. We need to update the flag definition in compose so you can use it multiple times

[CodeAnthem]

You can't yet. We need to update the flag definition in compose so you can use it multiple times

Oh I see :) Any idea when this is gonna happen?

[SBD580]

sounds like a relatively easy one, any intention to add it soon?

[ndeloof]

Multiple use of the --env-file flag is supported since v2.17.0

[SBD580]

That's great to hear @ndeloof - thanks (couldn't find a reference in the docs, but maybe I didn't looked hard enough)