Source code for pycif.plugins.datastreams.fields.lmdz_ic.fetch

import os

from .....utils import path




def fetch(
    ref_dir, ref_file, input_interval, target_dir, tracer=None, component=None
):
    """Link the single LMDz restart file for the simulation start date.

    Args:
        ref_dir (str): Path to the data.
        ref_file (str): File name format of the data.
        input_interval (list[datetime.datetime]): Date range; only the
            start date is used.
        target_dir (str): Where to link the data.
        tracer: Unused.
        component: Unused.

    Returns:
        (list_files, list_dates): tuple of single-entry dictionaries keyed
        by the simulation start date, describing the linked file and the
        (single-point) date interval it covers. Empty dicts if the
        original file is not found.
    """

    date = input_interval[0]
    input_file = os.path.join(ref_dir, date.strftime(ref_file))

    if not os.path.isfile(input_file):
        return {}, {}

    # Fetching
    target_file = os.path.join(target_dir, os.path.basename(input_file))
    path.link(input_file, target_file)

    list_files = {date: [input_file]}
    list_dates = {date: [[date, date]]}

    return list_files, list_dates