defulmere/bootstrap_rails.md

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Bootstrap a Rails project without having Rails installed first

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bootstrap_rails.md

Bootstrap a rails project without rails installed

Set GEM_HOME to an ephemeral directory then use gem exec to run rails:

export GEM_HOME=$( mktemp -d )
gem exec rails new myproject
cd myproject
bundle config set deployment true
bundle install
rm -rf $GEM_HOME
unset GEM_HOME