| 1 | #!/usr/bin/env python2
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| 2 | from __future__ import print_function
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| 3 |
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| 4 | from _devbuild.gen import arg_types
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| 5 | from _devbuild.gen.syntax_asdl import loc
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| 6 | from _devbuild.gen.value_asdl import (value, value_e)
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| 7 |
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| 8 | from core import completion
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| 9 | from core import error
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| 10 | from core import state
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| 11 | from display import ui
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| 12 | from core import vm
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| 13 | from mycpp import mylib
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| 14 | from mycpp.mylib import log, print_stderr
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| 15 | from frontend import flag_util
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| 16 | from frontend import args
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| 17 | from frontend import consts
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| 18 |
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| 19 | _ = log
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| 20 |
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| 21 | from typing import Dict, List, Iterator, cast, TYPE_CHECKING
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| 22 | if TYPE_CHECKING:
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| 23 | from _devbuild.gen.runtime_asdl import cmd_value
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| 24 | from core.completion import Lookup, OptionState, Api, UserSpec
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| 25 | from display import ui
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| 26 | from frontend.args import _Attributes
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| 27 | from frontend.parse_lib import ParseContext
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| 28 | from osh.cmd_eval import CommandEvaluator
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| 29 | from osh.split import SplitContext
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| 30 | from osh.word_eval import NormalWordEvaluator
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| 31 |
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| 32 |
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| 33 | class _FixedWordsAction(completion.CompletionAction):
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| 34 |
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| 35 | def __init__(self, d):
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| 36 | # type: (List[str]) -> None
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| 37 | self.d = d
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| 38 |
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| 39 | def Matches(self, comp):
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| 40 | # type: (Api) -> Iterator[str]
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| 41 | for name in sorted(self.d):
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| 42 | if name.startswith(comp.to_complete):
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| 43 | yield name
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| 44 |
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| 45 | def Print(self, f):
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| 46 | # type: (mylib.BufWriter) -> None
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| 47 | f.write('FixedWordsAction ')
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| 48 |
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| 49 |
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| 50 | class _DynamicProcDictAction(completion.CompletionAction):
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| 51 | """For completing shell functions/procs/invokables."""
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| 52 |
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| 53 | def __init__(self, d):
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| 54 | # type: (state.Procs) -> None
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| 55 | self.d = d
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| 56 |
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| 57 | def Matches(self, comp):
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| 58 | # type: (Api) -> Iterator[str]
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| 59 | for name in self.d.InvokableNames():
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| 60 | if name.startswith(comp.to_complete):
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| 61 | yield name
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| 62 |
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| 63 | def Print(self, f):
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| 64 | # type: (mylib.BufWriter) -> None
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| 65 | f.write('DynamicProcDictAction ')
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| 66 |
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| 67 |
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| 68 | class _DynamicStrDictAction(completion.CompletionAction):
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| 69 | """For completing from the alias dicts, which is mutable."""
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| 70 |
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| 71 | def __init__(self, d):
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| 72 | # type: (Dict[str, str]) -> None
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| 73 | self.d = d
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| 74 |
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| 75 | def Matches(self, comp):
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| 76 | # type: (Api) -> Iterator[str]
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| 77 | for name in sorted(self.d):
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| 78 | if name.startswith(comp.to_complete):
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| 79 | yield name
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| 80 |
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| 81 | def Print(self, f):
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| 82 | # type: (mylib.BufWriter) -> None
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| 83 | f.write('DynamicStrDictAction ')
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| 84 |
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| 85 |
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| 86 | class SpecBuilder(object):
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| 87 |
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| 88 | def __init__(
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| 89 | self,
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| 90 | cmd_ev, # type: CommandEvaluator
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| 91 | parse_ctx, # type: ParseContext
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| 92 | word_ev, # type: NormalWordEvaluator
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| 93 | splitter, # type: SplitContext
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| 94 | comp_lookup, # type: Lookup
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| 95 | help_data, # type: Dict[str, str]
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| 96 | errfmt # type: ui.ErrorFormatter
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| 97 | ):
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| 98 | # type: (...) -> None
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| 99 | """
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| 100 | Args:
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| 101 | cmd_ev: CommandEvaluator for compgen -F
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| 102 | parse_ctx, word_ev, splitter: for compgen -W
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| 103 | """
|
| 104 | self.cmd_ev = cmd_ev
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| 105 | self.parse_ctx = parse_ctx
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| 106 | self.word_ev = word_ev
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| 107 | self.splitter = splitter
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| 108 | self.comp_lookup = comp_lookup
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| 109 |
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| 110 | self.help_data = help_data
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| 111 | # lazily initialized
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| 112 | self.topic_list = None # type: List[str]
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| 113 |
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| 114 | self.errfmt = errfmt
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| 115 |
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| 116 | def Build(self, argv, attrs, base_opts):
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| 117 | # type: (List[str], _Attributes, Dict[str, bool]) -> UserSpec
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| 118 | """Given flags to complete/compgen, return a UserSpec.
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| 119 |
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| 120 | Args:
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| 121 | argv: only used for error message
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| 122 | """
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| 123 | cmd_ev = self.cmd_ev
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| 124 |
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| 125 | # arg_types.compgen is a subset of arg_types.complete (the two users of this
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| 126 | # function), so we use the generate type for compgen here.
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| 127 | arg = arg_types.compgen(attrs.attrs)
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| 128 | actions = [] # type: List[completion.CompletionAction]
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| 129 |
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| 130 | # NOTE: bash doesn't actually check the name until completion time, but
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| 131 | # obviously it's better to check here.
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| 132 | if arg.F is not None:
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| 133 | func_name = arg.F
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| 134 | func = cmd_ev.procs.GetShellFunc(func_name)
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| 135 | if func is None:
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| 136 | # Note: we will have a different protocol for YSH procs and invokables
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| 137 | # The ideal thing would be some kind of generator ...
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| 138 | raise error.Usage('shell function %r not found' % func_name,
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| 139 | loc.Missing)
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| 140 | actions.append(
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| 141 | completion.ShellFuncAction(cmd_ev, func, self.comp_lookup))
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| 142 |
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| 143 | if arg.C is not None:
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| 144 | # this can be a shell FUNCTION too, not just an external command
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| 145 | # Honestly seems better than -F? Does it also get COMP_CWORD?
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| 146 | command = arg.C
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| 147 | actions.append(completion.CommandAction(cmd_ev, command))
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| 148 | print_stderr('osh warning: complete -C not implemented')
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| 149 |
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| 150 | # NOTE: We need completion for -A action itself!!! bash seems to have it.
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| 151 | for name in attrs.actions:
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| 152 | if name == 'alias':
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| 153 | a = _DynamicStrDictAction(
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| 154 | self.parse_ctx.aliases
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| 155 | ) # type: completion.CompletionAction
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| 156 |
|
| 157 | elif name == 'binding':
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| 158 | # TODO: Where do we get this from?
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| 159 | a = _FixedWordsAction(['vi-delete'])
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| 160 |
|
| 161 | elif name == 'builtin':
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| 162 | a = _FixedWordsAction(consts.BUILTIN_NAMES)
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| 163 |
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| 164 | elif name == 'command':
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| 165 | # compgen -A command in bash is SIX things: aliases, builtins,
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| 166 | # functions, keywords, external commands relative to the current
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| 167 | # directory, and external commands in $PATH.
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| 168 |
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| 169 | actions.append(_FixedWordsAction(consts.BUILTIN_NAMES))
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| 170 | actions.append(_DynamicStrDictAction(self.parse_ctx.aliases))
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| 171 | actions.append(_DynamicProcDictAction(cmd_ev.procs))
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| 172 | actions.append(_FixedWordsAction(consts.OSH_KEYWORD_NAMES))
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| 173 | actions.append(completion.FileSystemAction(False, True, False))
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| 174 |
|
| 175 | # Look on the file system.
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| 176 | a = completion.ExternalCommandAction(cmd_ev.mem)
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| 177 |
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| 178 | elif name == 'directory':
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| 179 | a = completion.FileSystemAction(True, False, False)
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| 180 |
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| 181 | elif name == 'export':
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| 182 | a = completion.ExportedVarsAction(cmd_ev.mem)
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| 183 |
|
| 184 | elif name == 'file':
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| 185 | a = completion.FileSystemAction(False, False, False)
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| 186 |
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| 187 | elif name == 'function':
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| 188 | a = _DynamicProcDictAction(cmd_ev.procs)
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| 189 |
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| 190 | elif name == 'job':
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| 191 | a = _FixedWordsAction(['jobs-not-implemented'])
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| 192 |
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| 193 | elif name == 'keyword':
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| 194 | a = _FixedWordsAction(consts.OSH_KEYWORD_NAMES)
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| 195 |
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| 196 | elif name == 'user':
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| 197 | a = completion.UsersAction()
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| 198 |
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| 199 | elif name == 'variable':
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| 200 | a = completion.VariablesAction(cmd_ev.mem)
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| 201 |
|
| 202 | elif name == 'helptopic':
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| 203 | # Lazy initialization
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| 204 | if self.topic_list is None:
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| 205 | self.topic_list = self.help_data.keys()
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| 206 | a = _FixedWordsAction(self.topic_list)
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| 207 |
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| 208 | elif name == 'setopt':
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| 209 | a = _FixedWordsAction(consts.SET_OPTION_NAMES)
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| 210 |
|
| 211 | elif name == 'shopt':
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| 212 | a = _FixedWordsAction(consts.SHOPT_OPTION_NAMES)
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| 213 |
|
| 214 | elif name == 'signal':
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| 215 | a = _FixedWordsAction(['TODO:signals'])
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| 216 |
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| 217 | elif name == 'stopped':
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| 218 | a = _FixedWordsAction(['jobs-not-implemented'])
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| 219 |
|
| 220 | else:
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| 221 | raise AssertionError(name)
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| 222 |
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| 223 | actions.append(a)
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| 224 |
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| 225 | # e.g. -W comes after -A directory
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| 226 | if arg.W is not None: # could be ''
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| 227 | # NOTES:
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| 228 | # - Parsing is done at REGISTRATION time, but execution and splitting is
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| 229 | # done at COMPLETION time (when the user hits tab). So parse errors
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| 230 | # happen early.
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| 231 | w_parser = self.parse_ctx.MakeWordParserForPlugin(arg.W)
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| 232 |
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| 233 | try:
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| 234 | arg_word = w_parser.ReadForPlugin()
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| 235 | except error.Parse as e:
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| 236 | self.errfmt.PrettyPrintError(e)
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| 237 | raise # Let 'complete' or 'compgen' return 2
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| 238 |
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| 239 | a = completion.DynamicWordsAction(self.word_ev, self.splitter,
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| 240 | arg_word, self.errfmt)
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| 241 | actions.append(a)
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| 242 |
|
| 243 | extra_actions = [] # type: List[completion.CompletionAction]
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| 244 | if base_opts.get('plusdirs', False):
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| 245 | extra_actions.append(
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| 246 | completion.FileSystemAction(True, False, False))
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| 247 |
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| 248 | # These only happen if there were zero shown.
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| 249 | else_actions = [] # type: List[completion.CompletionAction]
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| 250 | if base_opts.get('default', False):
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| 251 | else_actions.append(
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| 252 | completion.FileSystemAction(False, False, False))
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| 253 | if base_opts.get('dirnames', False):
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| 254 | else_actions.append(completion.FileSystemAction(
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| 255 | True, False, False))
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| 256 |
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| 257 | if len(actions) == 0 and len(else_actions) == 0:
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| 258 | raise error.Usage(
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| 259 | 'No actions defined in completion: %s' % ' '.join(argv),
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| 260 | loc.Missing)
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| 261 |
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| 262 | p = completion.DefaultPredicate() # type: completion._Predicate
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| 263 | if arg.X is not None:
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| 264 | filter_pat = arg.X
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| 265 | if filter_pat.startswith('!'):
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| 266 | p = completion.GlobPredicate(False, filter_pat[1:])
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| 267 | else:
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| 268 | p = completion.GlobPredicate(True, filter_pat)
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| 269 |
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| 270 | # mycpp: rewrite of or
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| 271 | prefix = arg.P
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| 272 | if prefix is None:
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| 273 | prefix = ''
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| 274 |
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| 275 | # mycpp: rewrite of or
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| 276 | suffix = arg.S
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| 277 | if suffix is None:
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| 278 | suffix = ''
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| 279 |
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| 280 | return completion.UserSpec(actions, extra_actions, else_actions, p,
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| 281 | prefix, suffix)
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| 282 |
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| 283 |
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| 284 | class Complete(vm._Builtin):
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| 285 | """complete builtin - register a completion function.
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| 286 |
|
| 287 | NOTE: It's has an CommandEvaluator because it creates a ShellFuncAction, which
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| 288 | needs an CommandEvaluator.
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| 289 | """
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| 290 |
|
| 291 | def __init__(self, spec_builder, comp_lookup):
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| 292 | # type: (SpecBuilder, Lookup) -> None
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| 293 | self.spec_builder = spec_builder
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| 294 | self.comp_lookup = comp_lookup
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| 295 |
|
| 296 | def Run(self, cmd_val):
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| 297 | # type: (cmd_value.Argv) -> int
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| 298 | arg_r = args.Reader(cmd_val.argv, cmd_val.arg_locs)
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| 299 | arg_r.Next()
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| 300 |
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| 301 | attrs = flag_util.ParseMore('complete', arg_r)
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| 302 | arg = arg_types.complete(attrs.attrs)
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| 303 | # TODO: process arg.opt_changes
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| 304 |
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| 305 | commands = arg_r.Rest()
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| 306 |
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| 307 | if arg.D:
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| 308 | # if the command doesn't match anything
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| 309 | commands.append('__fallback')
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| 310 | if arg.E:
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| 311 | commands.append('__first') # empty line
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| 312 |
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| 313 | if len(commands) == 0:
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| 314 | if len(cmd_val.argv) == 1: # nothing passed at all
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| 315 | assert cmd_val.argv[0] == 'complete'
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| 316 |
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| 317 | self.comp_lookup.PrintSpecs()
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| 318 | return 0
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| 319 | else:
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| 320 | # complete -F f is an error
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| 321 | raise error.Usage('expected 1 or more commands', loc.Missing)
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| 322 |
|
| 323 | base_opts = dict(attrs.opt_changes)
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| 324 | try:
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| 325 | user_spec = self.spec_builder.Build(cmd_val.argv, attrs, base_opts)
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| 326 | except error.Parse as e:
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| 327 | # error printed above
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| 328 | return 2
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| 329 |
|
| 330 | for command in commands:
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| 331 | self.comp_lookup.RegisterName(command, base_opts, user_spec)
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| 332 |
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| 333 | # TODO: Hook this up
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| 334 | patterns = [] # type: List[str]
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| 335 | for pat in patterns:
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| 336 | self.comp_lookup.RegisterGlob(pat, base_opts, user_spec)
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| 337 |
|
| 338 | return 0
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| 339 |
|
| 340 |
|
| 341 | class CompGen(vm._Builtin):
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| 342 | """Print completions on stdout."""
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| 343 |
|
| 344 | def __init__(self, spec_builder):
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| 345 | # type: (SpecBuilder) -> None
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| 346 | self.spec_builder = spec_builder
|
| 347 |
|
| 348 | def Run(self, cmd_val):
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| 349 | # type: (cmd_value.Argv) -> int
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| 350 | arg_r = args.Reader(cmd_val.argv, cmd_val.arg_locs)
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| 351 | arg_r.Next()
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| 352 |
|
| 353 | arg = flag_util.ParseMore('compgen', arg_r)
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| 354 |
|
| 355 | if arg_r.AtEnd():
|
| 356 | to_complete = ''
|
| 357 | else:
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| 358 | to_complete = arg_r.Peek()
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| 359 | arg_r.Next()
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| 360 | # bash allows extra arguments here.
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| 361 | #if not arg_r.AtEnd():
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| 362 | # raise error.Usage('Extra arguments')
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| 363 |
|
| 364 | matched = False
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| 365 |
|
| 366 | base_opts = dict(arg.opt_changes)
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| 367 | try:
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| 368 | user_spec = self.spec_builder.Build(cmd_val.argv, arg, base_opts)
|
| 369 | except error.Parse as e:
|
| 370 | # error printed above
|
| 371 | return 2
|
| 372 |
|
| 373 | # NOTE: Matching bash in passing dummy values for COMP_WORDS and
|
| 374 | # COMP_CWORD, and also showing ALL COMPREPLY results, not just the ones
|
| 375 | # that start
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| 376 | # with the word to complete.
|
| 377 | matched = False
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| 378 | comp = completion.Api('', 0, 0) # empty string
|
| 379 | comp.Update('compgen', to_complete, '', -1, None)
|
| 380 | try:
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| 381 | for m, _ in user_spec.AllMatches(comp):
|
| 382 | matched = True
|
| 383 | print(m)
|
| 384 | except error.FatalRuntime:
|
| 385 | # - DynamicWordsAction: We already printed an error, so return failure.
|
| 386 | return 1
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| 387 |
|
| 388 | # - ShellFuncAction: We do NOT get FatalRuntimeError. We printed an error
|
| 389 | # in the executor, but RunFuncForCompletion swallows failures. See test
|
| 390 | # case in builtin-completion.test.sh.
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| 391 |
|
| 392 | # TODO:
|
| 393 | # - need to dedupe results.
|
| 394 |
|
| 395 | return 0 if matched else 1
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| 396 |
|
| 397 |
|
| 398 | class CompOpt(vm._Builtin):
|
| 399 | """Adjust options inside user-defined completion functions."""
|
| 400 |
|
| 401 | def __init__(self, comp_state, errfmt):
|
| 402 | # type: (OptionState, ui.ErrorFormatter) -> None
|
| 403 | self.comp_state = comp_state
|
| 404 | self.errfmt = errfmt
|
| 405 |
|
| 406 | def Run(self, cmd_val):
|
| 407 | # type: (cmd_value.Argv) -> int
|
| 408 | arg_r = args.Reader(cmd_val.argv, cmd_val.arg_locs)
|
| 409 | arg_r.Next()
|
| 410 |
|
| 411 | arg = flag_util.ParseMore('compopt', arg_r)
|
| 412 |
|
| 413 | if not self.comp_state.currently_completing: # bash also checks this.
|
| 414 | self.errfmt.Print_(
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| 415 | 'compopt: not currently executing a completion function')
|
| 416 | return 1
|
| 417 |
|
| 418 | self.comp_state.dynamic_opts.update(arg.opt_changes)
|
| 419 | #log('compopt: %s', arg)
|
| 420 | #log('compopt %s', base_opts)
|
| 421 | return 0
|
| 422 |
|
| 423 |
|
| 424 | class CompAdjust(vm._Builtin):
|
| 425 | """Uses COMP_ARGV and flags produce the 'words' array. Also sets $cur,
|
| 426 |
|
| 427 | $prev,
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| 428 |
|
| 429 | $cword, and $split.
|
| 430 |
|
| 431 | Note that we do not use COMP_WORDS, which already has splitting applied.
|
| 432 | bash-completion does a hack to undo or "reassemble" words after erroneous
|
| 433 | splitting.
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| 434 | """
|
| 435 |
|
| 436 | def __init__(self, mem):
|
| 437 | # type: (state.Mem) -> None
|
| 438 | self.mem = mem
|
| 439 |
|
| 440 | def Run(self, cmd_val):
|
| 441 | # type: (cmd_value.Argv) -> int
|
| 442 | arg_r = args.Reader(cmd_val.argv, cmd_val.arg_locs)
|
| 443 | arg_r.Next()
|
| 444 |
|
| 445 | attrs = flag_util.ParseMore('compadjust', arg_r)
|
| 446 | arg = arg_types.compadjust(attrs.attrs)
|
| 447 | var_names = arg_r.Rest() # Output variables to set
|
| 448 | for name in var_names:
|
| 449 | # Ironically we could complete these
|
| 450 | if name not in ['cur', 'prev', 'words', 'cword']:
|
| 451 | raise error.Usage('Invalid output variable name %r' % name,
|
| 452 | loc.Missing)
|
| 453 | #print(arg)
|
| 454 |
|
| 455 | # TODO: How does the user test a completion function programmatically? Set
|
| 456 | # COMP_ARGV?
|
| 457 | val = self.mem.GetValue('COMP_ARGV')
|
| 458 | if val.tag() != value_e.BashArray:
|
| 459 | raise error.Usage("COMP_ARGV should be an array", loc.Missing)
|
| 460 | comp_argv = cast(value.BashArray, val).strs
|
| 461 |
|
| 462 | # These are the ones from COMP_WORDBREAKS that we care about. The rest occur
|
| 463 | # "outside" of words.
|
| 464 | break_chars = [':', '=']
|
| 465 | if arg.s: # implied
|
| 466 | break_chars.remove('=')
|
| 467 | # NOTE: The syntax is -n := and not -n : -n =.
|
| 468 | # mycpp: rewrite of or
|
| 469 | omit_chars = arg.n
|
| 470 | if omit_chars is None:
|
| 471 | omit_chars = ''
|
| 472 |
|
| 473 | for c in omit_chars:
|
| 474 | if c in break_chars:
|
| 475 | break_chars.remove(c)
|
| 476 |
|
| 477 | # argv adjusted according to 'break_chars'.
|
| 478 | adjusted_argv = [] # type: List[str]
|
| 479 | for a in comp_argv:
|
| 480 | completion.AdjustArg(a, break_chars, adjusted_argv)
|
| 481 |
|
| 482 | if 'words' in var_names:
|
| 483 | state.BuiltinSetArray(self.mem, 'words', adjusted_argv)
|
| 484 |
|
| 485 | n = len(adjusted_argv)
|
| 486 | cur = adjusted_argv[-1]
|
| 487 | prev = '' if n < 2 else adjusted_argv[-2]
|
| 488 |
|
| 489 | if arg.s:
|
| 490 | if cur.startswith('--') and '=' in cur:
|
| 491 | # Split into flag name and value
|
| 492 | prev, cur = mylib.split_once(cur, '=')
|
| 493 | split = 'true'
|
| 494 | else:
|
| 495 | split = 'false'
|
| 496 | # Do NOT set 'split' without -s. Caller might not have declared it.
|
| 497 | # Also does not respect var_names, because we don't need it.
|
| 498 | state.BuiltinSetString(self.mem, 'split', split)
|
| 499 |
|
| 500 | if 'cur' in var_names:
|
| 501 | state.BuiltinSetString(self.mem, 'cur', cur)
|
| 502 | if 'prev' in var_names:
|
| 503 | state.BuiltinSetString(self.mem, 'prev', prev)
|
| 504 | if 'cword' in var_names:
|
| 505 | # Same weird invariant after adjustment
|
| 506 | state.BuiltinSetString(self.mem, 'cword', str(n - 1))
|
| 507 |
|
| 508 | return 0
|