list-like methods for seashore.executor._PreparedCommand?

[kurtbrose]

Specifically I'm trying to do docker-compose-in-docker:

    docker run -v "$(pwd)":"$(pwd)" \
             -v /var/run/docker.sock:/var/run/docker.sock \
             -e COMPOSE_PROJECT_NAME=$(basename "$(pwd)") \
             --workdir="$(pwd)" \
             -ti --rm \
             dduportal/docker-compose:latest --help

I guess I'll use command() for now and do a raw list of strings. It might be nice if there was some way to still leverage the executor.

executor.command(executor.docker.run(compose_image, volume=[], env={}, workdir='...')._cmd + ['--help']) is a convenient escape hatch that involves less manual intervention than doing the whole thing from scratch; not sure if this is overall a good API or not

[kurtbrose]

A cleaner version of that API that might work well:

executor.docker.run(...).extend(['--help'])

Add extend() to _PreparedCommand which just takes a list of strings and adds it to the end. Maybe in general _PreparedCommand could have some list-like methods? (Item assignment, insert, pop?)

[kurtbrose]

Or maybe tuple is the better analogy than list, since the command should be immutable.

[kurtbrose]

Another possibility: instead of build list or tuple-like the API is the same as the root executor:

executor.command(['docker', 'run', 'foo']) --> ['docker', 'run', 'foo']

executor.docker.run.command(['foo']) -> ['docker', 'run', 'foo']