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"""
Contains commands for dealing with exploded and imploded forms.
"""
import os
import asdf
from asdf import AsdfFile
from .main import Command
__all__ = ["explode", "implode"]
class Implode(Command):
@classmethod
def setup_arguments(cls, subparsers):
parser = subparsers.add_parser(
"implode",
help="Implode a ASDF file.",
description="""Combine a ASDF file, where the data may be
stored in multiple ASDF files, into a single ASDF
file.""",
)
parser.add_argument("filename", nargs=1, help="""The ASDF file to implode.""")
parser.add_argument(
"--output",
"-o",
type=str,
nargs="?",
help="""The name of the output file. If not provided, it
will be the name of the input file with "_all"
appended.""",
)
parser.add_argument(
"--resolve-references",
"-r",
action="store_true",
help="""Resolve all references and store them directly in
the output file.""",
)
parser.set_defaults(func=cls.run)
return parser
@classmethod
def run(cls, args):
return implode(args.filename[0], args.output, args.resolve_references)
def implode(input_, output=None, resolve_references=False):
"""
Implode a given ASDF file, which may reference external data, back
into a single 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.
"""
if output is None:
base, ext = os.path.splitext(input_)
output = base + "_all" + ".asdf"
with asdf.open(input_) as ff:
ff2 = AsdfFile(ff)
if resolve_references:
ff2.resolve_references()
ff2.write_to(output, all_array_storage="internal")
class Explode(Command):
@classmethod
def setup_arguments(cls, subparsers):
parser = subparsers.add_parser(
"explode",
help="Explode a ASDF file.",
description="""From a single ASDF file, create a set of
ASDF files where each data block is stored in a separate
file.""",
)
parser.add_argument("filename", nargs=1, help="""The ASDF file to explode.""")
parser.add_argument(
"--output",
"-o",
type=str,
nargs="?",
help="""The name of the output file. If not provided, it
will be the name of the input file with "_exploded"
appended.""",
)
parser.set_defaults(func=cls.run)
return parser
@classmethod
def run(cls, args):
return explode(args.filename[0], args.output)
def explode(input_, output=None):
"""
Explode a given ASDF file so each data block is in a separate
file.
Parameters
----------
input_ : str or file-like object
The input file.
output : str of file-like object
The output file.
"""
if output is None:
base, ext = os.path.splitext(input_)
output = base + "_exploded" + ".asdf"
with asdf.open(input_) as ff:
ff.write_to(output, all_array_storage="external")
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