Support docker compose plugin to justfile

[sharkAndshark]

Support docker compose plugin to justfile

[nyurik]

A temporary workaround could be to add an alias to bash

[justb4]

This is a common problem, that will still remain some years, until docker compose is the only command.
We solved this in a workshop launch control Bash script like @nyurik indicated: sniff for the variant and set an alias. See these lines i.e.:

# Sniff which Docker Compose variant is installed
# and set an alias.
# See https://github.com/geopython/geopython-workshop/issues/82
if command docker-compose --version &> /dev/null
then
  alias dockercompose='docker-compose'
  echo "Using docker-compose"
else
  if !command docker compose version &> /dev/null
  then
    echo "Neither docker-compose nor docker compose is available"
    echo "Check your Docker Installation"
    exit 1
  fi
  alias dockercompose='docker compose'  
  echo "Using docker compose"
fi

..and then use the alias dockercompose. Never heard of just (other than my first name..) but seems something to be added in the justfile as bash is presumed? Will PR...

[nyurik]

I think we may need to test if the system has a docker-compose, and if it does not, use docker compose - something similar to the check we have in the cargo-install just command - but do it once when just starts up?

[justb4]

The "bash-script" approach in my comment above does not really work direct in a justfile because of the 'just-syntax'. But figured out an alternative, using standard var and -substitution, so an approach with oneliner:

dockercompose := `if docker-compose --version &> /dev/null; then echo "docker-compose"; else echo "docker compose"; fi`
.
.
up:
   {{ dockercompose }} up

up-build:
    {{ dockercompose }} up --build
.
.

There is a justfile in the repo root and the demo dir. Will go ahead with this approach.