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

import os
from logging import debug

from .....utils import path




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

    Args:
        ref_dir: Directory where the original files are found.
        ref_file: Date-format pattern for the original file name.
        input_interval: List of two dates, the beginning and end of the
            simulation; only the start date is used.
        target_dir: Directory where the link to the original file is
            created.
        tracer: Unused.
        component: Unused.

    Returns:
        A tuple ``(list_files, list_dates)``, each a single-entry
        dictionary keyed by the simulation start date (empty dicts if the
        file is not found).
    """
    initial_date = input_interval[0]
    file_path = initial_date.strftime(os.path.join(ref_dir, ref_file))

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

    target_file_path = os.path.join(target_dir, os.path.basename(file_path))
    path.link(file_path, target_file_path)

    list_dates = {initial_date: [[initial_date, initial_date]]}
    list_files = {initial_date: [target_file_path]}

    return list_files, list_dates