Install different gems in Docker container
Snippet
Yeah, kitt finished writing this at 20:11 on 24 April 2020
I have a development environment that is used locally within docker containers, and deployed to a Heroku-like environment, which has a different setup than the local Docker setup. When running locally in Docker containers, I want to install debase
and the ruby-debug-ide
gems, so that I can use RubyMine locally, but these are not needed when deployed to the development instance. The deployment does not use the Docker / docker-compose files, so I'm okay with having them be local-development specific.
The trick I found was to use groups in the Gemfile
.
In my Dockerfile, I'd call out the groups with the --with={groups}
arguments:
RUN bundler install --with=development,docker
group :docker do gem 'debase' gem 'ruby-debug-ide' end
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