Using Docker for RubyGems projects
Sometimes I want to create a new gem or modify existing gems to extend/fix them. However, I do not want to install tons of additional development tools on my host machine for that. Recently, I created a shell script which creates an instant development environment on Docker for that.
#!/bin/sh -e exec docker run --rm -it \ --workdir=/work \ -v $(pwd):/work \ -v=$HOME/.gitconfig:/root/.gitconfig \ -v=$HOME/.ssh:/root/.ssh \ -v=$HOME/.gem/credentials:/root/.gem/credentials \ ruby:${VERSION:-2.6.5} \ /bin/bash "$@" This is a deadly-simple wrapper for docker command to run a ruby container mounting minimum-required files. Just put this file under a directory whatever it is in $PATH list (For example, /usr/local/bin/rubyshell) and run rubyshell in a Ruby project. Then I can do Ruby things such as bundle.