Function recipes 

pub fn recipes(
    ctx: &Context,
    req: RecipesRequest,
) -> Result<Outcome<RecipeMatches>, CoreError>

Work out which recipes under Context::base_path the pantry can cook.

An ingredient counts as in stock when its name matches a pantry item’s, compared lowercased and otherwise exactly — no unit or quantity is considered, so a recipe needing a kilo of flour matches a pantry holding a gram of it. References to other recipes are ignored, and so are optional ingredients (@?chives): a recipe whose only absent ingredients are optional is a full match. A recipe left with no ingredients at all matches nothing. See [required_ingredients] for what else is left out.

Recipes are found by walking the collection, .menu files included. A recipe that cannot be read or parsed is left out, with a warning in Outcome::diagnostics naming it — it is not counted as a match or a miss. Warnings from recipes that did parse are not reported here, because they cannot change the answer; doctor::validate is the command for those.

Errors

• As load, since this needs the pantry.
• CoreError::Search if the collection cannot be walked, and CoreError::Io if a file in it cannot be listed — as doctor::validate.