How can you use a Chef recipe to set an environment variable?

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If you need an env var set strictly within the Chef process, you can use ENV['foo'] = 'bar‘ since it’s a ruby process.

If you need to set one for an execute provider, Chef exposes an environment hash:

execute 'Bootstrap the database' do 
  cwd "#{app_dir}/current"
  command "#{env_cmd} rake db:drop db:create db:schema:load RAILS_ENV=#{rails_env}"
  environment 'HOME' => "/home/#{app_user}"
  user app_user
  action :run
  not_if %[psql -U postgres -c "\\l" | grep #{db_name}]
end

If you’re looking to set a persistent environment variable then you may want to have Chef edit /etc/profile.d/chef.sh, /etc/environment, a users’ profile, etc.

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