Posted about 6 years ago. Visible to the public.

A Ruby script that installs all gems it is missing

So you want your Ruby script to install missing gems instead of dying? Take this method:

def installing_missing_gems(&block) yield rescue LoadError => e gem_name = e.message.split('--').last.strip install_command = 'gem install ' + gem_name # install missing gem puts 'Probably missing gem: ' + gem_name print 'Auto-install it? [yN] ' gets.strip =~ /y/i or exit(1) system(install_command) or exit(1) # retry Gem.clear_paths puts 'Trying again ...' require gem_name retry end

Use it like this:

installing_missing_gems do require 'thor' require 'nokogiri' # some code using those gems end

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Owner of this card:

Dominik Schöler
Last edit:
over 5 years ago
by Dominik Schöler
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Dominik Schöler to makandra dev
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