Writing recipes

For more information about recipes, see Recipes based on code.

To start creating a recipe plugin, you have to write a “regular” Python recipe and then make it reusable:

• Go to the Advanced tab
• Click on “Convert to custom recipe”
• Select the dev plugin to add the custom recipe to
• Click on “Convert”

Recipe roles

Each role has the following structure:

• name: Name of the role; this is how the role is referenced elsewhere in code
• label: A displayed name for this role
• description: A description of what the role means
• arity: UNARY or NARY (can accept one or multiple values?)
• required (boolean, default false): Does this role need to be filled?
• acceptsDataset (boolean, default true)
• acceptsManagedFolder (boolean, default false)

Advanced options for custom recipes

Select from flow view

To make a new recipe directly available from the Flow view when selecting a dataset:

• Edit the recipe.json file
• Add the line "selectableFromDataset": "main",, where main must be replaced by the name of the input role in which the selected dataset will go

The resulting file will look like:

{
    "meta" : {
        "label" : "My custom recipe",
        "icon" : "icon-puzzle-piece"
    },

    "kind" : "PYTHON",

    "selectableFromDataset": "main",

    "inputRoles" : [
        {
            "name": "main",
            "label": "Input dataset",
            "arity": "UNARY",
            "required": true,
            "acceptsDataset": true
        }
    ],

    "outputRoles" : [
        {
            "name": "output",
            "label": "Output dataset",
            "arity": "UNARY",
            "required": true,
            "acceptsDataset": true
        }
    ],

    "params": [],
    "resourceKeys" : []
}

Change icon color

When you use lots of custom recipes in your flows, you may want to differentiate them by color. It allows for clearer flow views and easier disctinction between different custom recipe operations.

DSS currently supports the following colors: red, pink, purple, blue, green, sky, yellow, orange, brown, grey.

You can specify the “iconColor” in the “meta” field of your recipe.json file:

{
    "meta" : {
        "label": "My custom recipe",
        "icon": "icon-puzzle-piece",
        "iconColor": "sky"
    }
}