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95 lines
No EOL
2.4 KiB
Python
95 lines
No EOL
2.4 KiB
Python
# This file is part of beets.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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from beets.dbcore import FieldQuery
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from beets.plugins import BeetsPlugin
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from beets.ui import Subcommand, decargs, print_
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from collections import deque
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from itertools import islice
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def lslimit(lib, opts, args):
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"""Query command with head/tail"""
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head = opts.head
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tail = opts.tail
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if head and tail:
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raise RuntimeError("Only use one of --head and --tail")
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query = decargs(args)
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if opts.album:
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objs = lib.albums(query)
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else:
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objs = lib.items(query)
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if head:
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objs = islice(objs, head)
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elif tail:
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objs = deque(objs, tail)
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for obj in objs:
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print_(format(obj))
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lslimit_cmd = Subcommand(
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"lslimit",
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help="query with optional head or tail"
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)
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lslimit_cmd.parser.add_option(
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'--head',
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action='store',
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type="int",
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default=None
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)
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lslimit_cmd.parser.add_option(
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'--tail',
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action='store',
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type="int",
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default=None
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)
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lslimit_cmd.parser.add_all_common_options()
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lslimit_cmd.func = lslimit
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class LsLimitPlugin(BeetsPlugin):
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def commands(self):
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return [lslimit_cmd]
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class HeadPlugin(BeetsPlugin):
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"""Head of an arbitrary query.
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This allows a user to limit the results of any query to the first
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`pattern` rows. Example usage: return first 10 tracks `beet ls '<10'`.
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"""
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def queries(self):
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class HeadQuery(FieldQuery):
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"""Singleton query implementation that tracks result count."""
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n = 0
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include = True
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@classmethod
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def value_match(cls, pattern, value):
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cls.n += 1
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if cls.include:
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cls.include = cls.n <= int(pattern)
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return cls.include
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return {
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"<": HeadQuery
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} |