pip install ChefScript

ChefScript [-h] [<filename>]

seasoned steak
    2 lb of New York strip steak (pat dry)
    1 1/2 tsp of salt (apply onto both sides)
    1 tsp of black pepper (
        apply onto both sides,
        rub in
    )

cook seasoned steak with 1 lb of New York strip steak

--------------------Cooking seasoned steak with scale 0.500 --------------------
Recipe for seasoned steak:
    Summary of ingredients:
        1.000 lb of New York strip steak
        0.500 tsp of black pepper
        0.750 tsp of salt
    Instructions:
        1.000 lb of New York strip steak (pat dry)
        0.750 tsp of salt (apply onto both sides)
        0.500 tsp of black pepper (
        apply onto both sides,
        rub in
    )
--------------------------------------------------------------------------------

A number in ChefScript is a list of whitespace-separated floats or quotients (fraction of two floats). Its value is the sum of all floats and quotients in the list.

1/2 (this is 0.500)
1 1/2 (this is 1.500)
1.3e2 15 .5e1 (this is 150.000)

The purpose of this design is to make it possible to write 1 1/2 like a recipe book will do, instead of 1.5 which is less commonly used.

A quantity is a number followed by a unit. It is recommended to write a unit case-insensitively (mL is different from ML, but mL is the same as ml), and using spaces to separate words (fl oz or fl. oz. looks better than fl_oz). It is recommended but not mandatory to put a space between the number and the unit.

1 cup
1 1/2 cups
50 fl oz

An ingredient is a quantity followed by the keyword of and a name. It is recommended to write a name using spaces to separate words (chicken breast looks better than chicken_breast), but sometimes an underscore as to be used when a word is in conflict with a keyword.

1 lb of chicken breast

A recipe is a name followed by a list of ingredients or other recipes, and optionally together with a list of instructions. The name follows the same rules as an ingredient's name. The instruction is a comment that starts on the same line as an ingredient or a recipe inside the recipe.

seasoned steak
    2 lb of New York strip steak (pat dry)
    (
        you can put a comment here as well,
        but it won't be recognised as an instruction.
    )
    1 1/2 tsp of salt (apply onto both sides)
    1 tsp of black pepper (
        apply onto both sides,
        rub in
    )

When an ingredient is mentioned more than once in a recipe, it will be considered a new one each time, and the quantities will be added together. When a recipe is mentioned more than once in a recipe, it will be considered the same reused, and the quantities will not be added together.

A comment starts with ( and ends with ). It can be placed at the end of any line, and can run for multiple lines. When put at the end of a line with an ingredient or a recipe, it will be recognised as an instruction.

(
    this is a comment
    that runs for multiple lines
)

Currently, there is only one built-in function in ChefScript, which is cook. It takes a recipe and an optional scale as arguments, and prints out the recipe with the scale applied to all quantities. The scale can be a number or an ingredient, recognised by different keywords used with cook.

cook seasoned steak
cook seasoned steak for 2 times
cook seasoned steak with 1 lb of New York strip steak

The keywords are

of
cook
for
times
with

The delimiters are

(
)

These should be avoided in names.