What is a recipe?

A recipe is a python module containing related python functions

asr.gs as an example

...

@command(module='asr.gs',
         creates=['gs.gpw'],
         requires=['structure.json'],
         resources='8:10h')
@option('-c', '--calculator', help='Calculator params.', type=DictStr())
def calculate(calculator: dict = {
        'name': 'gpaw',
        'mode': {'name': 'pw', 'ecut': 800},
        'xc': 'PBE',
        'basis': 'dzp',
        'kpts': {'density': 12.0, 'gamma': True},
        'occupations': {'name': 'fermi-dirac',
                        'width': 0.05},
        'convergence': {'bands': 'CBM+3.0'},
        'nbands': '200%',
        'txt': 'gs.txt',
        'charge': 0}) -> ASRResult:

    ...

    return ASRResult()

...

...

@command(module='asr.gs',
             requires=['gs.gpw', 'structure.json',
                       'results-asr.magnetic_anisotropy.json'],
         dependencies=['asr.gs@calculate', 'asr.magnetic_anisotropy',
                       'asr.structureinfo'],
         returns=Result)
def main() -> Result:

    ...

    return Result(etot=etot, forces=forces, ...)

...