79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
"""$ fio info"""
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import logging
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import json
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import click
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from cligj import indent_opt
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import fiona
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import fiona.crs
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from fiona.errors import DriverError
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from fiona.fio import options, with_context_env
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logger = logging.getLogger(__name__)
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@click.command()
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# One or more files.
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@click.argument('input', required=True)
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@click.option('--layer', metavar="INDEX|NAME", callback=options.cb_layer,
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help="Print information about a specific layer. The first "
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"layer is used by default. Layers use zero-based "
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"numbering when accessed by index.")
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@indent_opt
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# Options to pick out a single metadata item and print it as
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# a string.
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@click.option('--count', 'meta_member', flag_value='count',
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help="Print the count of features.")
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@click.option('-f', '--format', '--driver', 'meta_member', flag_value='driver',
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help="Print the format driver.")
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@click.option('--crs', 'meta_member', flag_value='crs',
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help="Print the CRS as a PROJ.4 string.")
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@click.option('--bounds', 'meta_member', flag_value='bounds',
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help="Print the boundary coordinates "
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"(left, bottom, right, top).")
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@click.option('--name', 'meta_member', flag_value='name',
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help="Print the datasource's name.")
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@options.open_opt
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@click.pass_context
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@with_context_env
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def info(ctx, input, indent, meta_member, layer, open_options):
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"""
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Print information about a dataset.
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When working with a multi-layer dataset the first layer is used by default.
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Use the '--layer' option to select a different layer.
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"""
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with fiona.open(input, layer=layer, **open_options) as src:
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info = src.meta
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info.update(name=src.name)
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try:
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info.update(bounds=src.bounds)
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except DriverError:
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info.update(bounds=None)
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logger.debug(
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"Setting 'bounds' to None - driver was not able to calculate bounds"
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)
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try:
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info.update(count=len(src))
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except TypeError:
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info.update(count=None)
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logger.debug(
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"Setting 'count' to None/null - layer does not support counting"
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)
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info["crs"] = src.crs.to_string()
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if meta_member:
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if isinstance(info[meta_member], (list, tuple)):
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click.echo(" ".join(map(str, info[meta_member])))
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else:
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click.echo(info[meta_member])
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else:
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click.echo(json.dumps(info, indent=indent))
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