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Viewing changes to breezy/commands.py

  • Committer: Jelmer Vernooij
  • Date: 2017-07-23 22:06:41 UTC
  • mfrom: (6738 trunk)
  • mto: This revision was merged to the branch mainline in revision 6739.
  • Revision ID: jelmer@jelmer.uk-20170723220641-69eczax9bmv8d6kk
Merge trunk, address review comments.

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breezy/commands.py
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    cleanup,
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    cmdline,
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    debug,
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    errors,
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    i18n,
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    option,
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    osutils,
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# Compatibility - Option used to be in commands.
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from .option import Option
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from .plugin import disable_plugins, load_plugins, plugin_name
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from . import registry
 
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from . import errors, registry
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from .sixish import (
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    string_types,
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    )
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class BzrOptionError(errors.BzrCommandError):
 
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    _fmt = "Error in command line options"
 
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class CommandInfo(object):
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    """Information about a command."""
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    return plugin_cmds.keys()
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# Overrides for common mispellings that heuristics get wrong
 
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_GUESS_OVERRIDES = {
 
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    'ic': {'ci': 0}, # heuristic finds nick
 
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    }
 
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def guess_command(cmd_name):
 
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    """Guess what command a user typoed.
 
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    :param cmd_name: Command to search for
 
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    :return: None if no command was found, name of a command otherwise
 
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    """
 
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    names = set()
 
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    for name in all_command_names():
 
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        names.add(name)
 
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        cmd = get_cmd_object(name)
 
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        names.update(cmd.aliases)
 
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    # candidate: modified levenshtein distance against cmd_name.
 
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    costs = {}
 
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    from . import patiencediff
 
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    for name in sorted(names):
 
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        matcher = patiencediff.PatienceSequenceMatcher(None, cmd_name, name)
 
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        distance = 0.0
 
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        opcodes = matcher.get_opcodes()
 
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        for opcode, l1, l2, r1, r2 in opcodes:
 
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            if opcode == 'delete':
 
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                distance += l2-l1
 
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            elif opcode == 'replace':
 
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                distance += max(l2-l1, r2-l1)
 
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            elif opcode == 'insert':
 
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                distance += r2-r1
 
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            elif opcode == 'equal':
 
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                # Score equal ranges lower, making similar commands of equal
 
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                # length closer than arbitrary same length commands.
 
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                distance -= 0.1 * (l2-l1)
 
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        costs[name] = distance
 
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    costs.update(_GUESS_OVERRIDES.get(cmd_name, {}))
 
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    costs = sorted((value, key) for key, value in costs.iteritems())
 
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    if not costs:
 
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        return
 
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    if costs[0][0] > 4:
 
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        return
 
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    candidate = costs[0][1]
 
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    return candidate
 
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def get_cmd_object(cmd_name, plugins_override=True):
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    """Return the command object for a command.
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    try:
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        return _get_cmd_object(cmd_name, plugins_override)
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    except KeyError:
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        raise errors.BzrCommandError(gettext('unknown command "%s"') % cmd_name)
 
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        # No command found, see if this was a typo
 
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        candidate = guess_command(cmd_name)
 
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        if candidate is not None:
 
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            raise errors.BzrCommandError(
 
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                    gettext('unknown command "%s". Perhaps you meant "%s"')
 
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                    % (cmd_name, candidate))
 
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        raise errors.BzrCommandError(gettext('unknown command "%s"')
 
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                % cmd_name)
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def _get_cmd_object(cmd_name, plugins_override=True, check_missing=True):