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Pants

Is it possible to override an individual docker build arg at package time?

`PANTS_DOCKER_BUILD_ARGS="['COMMIT_SHA=$COMMIT_SHA']"` will set the entire list and others that were defined in `pants.tml` are removed. I was not able to get `+[..]` syntax working

I would like to have a default value for an arg, so just putting the arg name in `docker.build_args` to extract it from the env is not an option.

You want to add the arg for all images, or just one?

I want it to apply to a single `./pants package &lt;target&gt;` run

OK, but all images in the run (but there happens to be just one)?

You can set per-image args on the docker_image target IIRC, just wanted to be sure that's not what you're asking about

So `./pants --docker-build-args='+["COMMIT_SHA=LITERAL_SHA"]' ...` should work, does it not?

`PANTS_DOCKER_BUILD_ARGS="+['COMMIT_SHA=$COMMIT_SHA']"`  does not work, I will confirm with the cli arg