Command line app built with Ruby
Ruby 2.5
Install bundler
gem install bundler
and dependencies
bundle install
Simply pass any data file using the -f option
A working example is available in spec/customers.txt
ruby simple_calcs.rb -f spec/customers.txt
Give it execution permissions to use it as bash script
chmod +x simple_calcs.rb
./simple_calcs.rb -f spec/customers.txt
-h flag prints out a help text
Run tests with
rspec