result = Ingreedy.parse('1 lb. potatoes')
print result.amount
  #=> 1.0
print result.unit
  #=> :pound
print result.ingredient
  #=> "potatoes"

Ingreedy.dictionaries[:fr] = {
  units: { dash: ['pincée'] },
  numbers: { 'une' => 1 },
  prepositions: ['de']
  range_separators: ['ou']
}

Ingreedy.locale = :fr # Also automatically follows I18n.locale and I18n.fallbacks if available

result = Ingreedy.parse('une pincée de sucre')
print result.amount
  #=> 1.0
print result.unit
  #=> :dash
print result.ingredient
  #=> "sucre"

By default, Ingreedy will convert all amounts to a rational number:

result = Ingreedy.parse("1 1/2 cups flour")
print result.amount
  #=> 3/2

However, setting Ingreedy.preverse_amounts = true, will allow amounts to be detected and returned as originally input:

Ingreedy.preserve_amounts = true

result = Ingreedy.parse("1 1/2 cups flour")
print result.amount
  #=> 1 1/2

To try to make development easier, I have added a Dockerfile and docker-compose.yml to make things as boring and simple as possible. If you have Docker installed you should be able to simply start developing (and work on the specs) by doing:

docker-compose build
docker-compose run ingreedy bash

# Now you will get a bash prompt inside the docker container
bundle # to install gems
bundle exec rspec

I realize that the above could be improved with better Dockerfile or docker-compose.yml or changing the way the volumes are handled, or making the container totally transient. This was just the easiest way for me to make the changes I needed, and I'm still pretty new to working on Gems in general.