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"""
Defragment command.
"""
import asdf
from .. import AsdfFile
from .main import Command
__all__ = ["defragment"]
class Defragment(Command):
@classmethod
def setup_arguments(cls, subparsers):
parser = subparsers.add_parser(
"defragment",
help="Defragment an ASDF file..",
description="""Removes any unused blocks and unused space.""",
)
parser.add_argument("filename", nargs=1, help="""The ASDF file to collect.""")
parser.add_argument("--output", "-o", type=str, nargs="?", help="""The name of the output file.""")
parser.add_argument(
"--resolve-references",
"-r",
action="store_true",
help="""Resolve all references and store them directly in
the output file.""",
)
parser.add_argument(
"--compress",
"-c",
type=str,
nargs="?",
choices=["zlib", "bzp2", "lz4"],
help="""Compress blocks using one of "zlib", "bzp2" or "lz4".""",
)
parser.set_defaults(func=cls.run)
return parser
@classmethod
def run(cls, args):
return defragment(args.filename[0], args.output, args.resolve_references, args.compress)
def defragment(input, output=None, resolve_references=False, compress=None):
"""
Defragment a given ASDF file.
Parameters
----------
input : str or file-like object
The input file.
output : str of file-like object
The output file.
resolve_references : bool, optional
If `True` resolve all external references before saving.
compress : str, optional
Compression to use.
"""
with asdf.open(input) as ff:
ff2 = AsdfFile(ff)
if resolve_references:
ff2.resolve_references()
ff2.write_to(output, all_array_storage="internal", all_array_compression=compress)
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