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"""
Implementation of command for displaying available tags in asdf
"""
import sys
from asdf import AsdfFile
from .main import Command
__all__ = ["list_tags"]
class TagLister(Command): # pragma: no cover
"""This class is the plugin implementation for the asdftool runner."""
@classmethod
def setup_arguments(cls, subparsers):
parser = subparsers.add_parser(
"tags",
help="List currently available tags",
description="""Lists currently available tags.""",
)
parser.add_argument(
"-d",
"--display-classes",
action="store_true",
help="""Display associated class names in addition to tags""",
)
parser.set_defaults(func=cls.run)
return parser
@classmethod
def run(cls, args):
return list_tags(display_classes=args.display_classes)
def _format_type(typ):
if isinstance(typ, str):
return typ
return f"{typ.__module__}.{typ.__name__}"
def list_tags(display_classes=False, iostream=sys.stdout):
"""Function to list tags"""
af = AsdfFile()
tag_pairs = []
for tag in af.extension_manager._converters_by_tag:
tag_pairs.append((tag, af.extension_manager.get_converter_for_tag(tag).types))
for tag, types in sorted(tag_pairs, key=lambda pair: pair[0]):
string = str(tag)
if display_classes:
string += ": " + ", ".join(_format_type(t) for t in types)
iostream.write(string + "\n")
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