Prepare a Zarr Directory Store for deployment on a Netlify Site

netlify-zarr-config.py

#!/usr/bin/env python3

"""Netlify does not serve hidden files, i.e files starting with a '.'. Copy Zarr
hidden files and generate a '_redirects' file for Zarr DirectoryStore
deployment.

References:

    - https://docs.netlify.com/routing/redirects/#syntax-for-the-redirects-file
    - https://community.netlify.com/t/hidden-files-removed-in-zip-deploy/8997
"""

import os
import argparse
import pathlib
import shutil

zarr_files = {
        '.zmetadata',
        '.zgroup',
        '.zattrs',
        '.zarray',
        }

def main(store):
    with open(os.path.join(store, '_redirects'), 'w') as fp:
        for (dirpath, dirs, files) in os.walk(store):
            found = zarr_files.intersection(files)
            for filename in found:
                path = pathlib.Path(dirpath, filename)
                from_path = path.relative_to(store)
                path_visible = pathlib.Path(dirpath, filename[1:])
                to_path = path_visible.relative_to(store)
                fp.write('/{0} /{1}\n'.format(from_path, to_path))
                shutil.copyfile(path, path_visible)

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Process some integers.')
    parser.add_argument('store', help='Path to the Zarr DirectoryStore')

    args = parser.parse_args()
    main(args.store)