| 1 | #!/usr/bin/env python2
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| 2 | """
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| 3 | readline_osh.py - Builtins that are dependent on GNU readline.
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| 4 | """
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| 5 | from __future__ import print_function
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| 6 |
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| 7 | from _devbuild.gen import arg_types
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| 8 | from _devbuild.gen.syntax_asdl import loc
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| 9 | from _devbuild.gen.value_asdl import value_e
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| 10 | from core import pyutil
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| 11 | from core import vm
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| 12 | from core.error import e_usage
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| 13 | from frontend import flag_util
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| 14 | from mycpp import mops
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| 15 | from mycpp import mylib
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| 16 | from mycpp.mylib import log
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| 17 |
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| 18 | from typing import Optional, Any, TYPE_CHECKING
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| 19 | if TYPE_CHECKING:
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| 20 | from _devbuild.gen.runtime_asdl import cmd_value
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| 21 | from frontend.py_readline import Readline
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| 22 | from core import sh_init
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| 23 | from display import ui
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| 24 |
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| 25 | _ = log
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| 26 |
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| 27 |
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| 28 | class ctx_Keymap(object):
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| 29 |
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| 30 | def __init__(self, readline, keymap_name=None):
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| 31 | # type: (Readline, str) -> None
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| 32 | self.readline = readline
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| 33 | self.orig_keymap_name = keymap_name
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| 34 |
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| 35 | def __enter__(self):
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| 36 | # type: () -> None
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| 37 | if self.orig_keymap_name is not None:
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| 38 | self.readline.use_temp_keymap(self.orig_keymap_name)
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| 39 |
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| 40 | def __exit__(self, type, value, traceback):
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| 41 | # type: (Any, Any, Any) -> None
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| 42 | if self.orig_keymap_name is not None:
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| 43 | self.readline.restore_orig_keymap()
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| 44 |
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| 45 |
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| 46 | class Bind(vm._Builtin):
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| 47 | """Interactive interface to readline bindings"""
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| 48 |
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| 49 | def __init__(self, readline, errfmt):
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| 50 | # type: (Optional[Readline], ui.ErrorFormatter) -> None
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| 51 | self.readline = readline
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| 52 | self.errfmt = errfmt
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| 53 | self.exclusive_flags = ["q", "u", "r", "x", "f"]
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| 54 |
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| 55 | def Run(self, cmd_val):
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| 56 | # type: (cmd_value.Argv) -> int
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| 57 | readline = self.readline
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| 58 | if not readline:
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| 59 | e_usage("is disabled because Oils wasn't compiled with 'readline'",
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| 60 | loc.Missing)
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| 61 |
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| 62 | attrs, arg_r = flag_util.ParseCmdVal('bind', cmd_val)
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| 63 |
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| 64 | # print("attrs:\n", attrs)
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| 65 | # print("attrs.attrs:\n", attrs.attrs)
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| 66 | # print("attrs.attrs.m:\n", attrs.attrs["m"])
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| 67 | # print("type(attrs.attrs.m):\n", type(attrs.attrs["m"]))
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| 68 | # print("type(attrs.attrs[m]):\n", type(attrs.attrs["m"]))
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| 69 | # print("attrs.attrs[m].tag() :\n", attrs.attrs["m"].tag())
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| 70 | # print("attrs.attrs[m].tag() == value_e.Undef:\n", attrs.attrs["m"].tag() == value_e.Undef)
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| 71 | # print(arg_r)
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| 72 | # print("Reader argv=%s locs=%s n=%i i=%i" % (arg_r.argv, str(arg_r.locs), arg_r.n, arg_r.i))
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| 73 |
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| 74 | # Check mutually-exclusive flags and non-flag args
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| 75 | found = False
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| 76 | for flag in self.exclusive_flags:
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| 77 | if (flag in attrs.attrs and
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| 78 | attrs.attrs[flag].tag() != value_e.Undef):
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| 79 | # print("\tFound flag: {0} with tag: {1}".format(flag, attrs.attrs[flag].tag()))
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| 80 | if found:
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| 81 | self.errfmt.Print_(
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| 82 | "error: can only use one of the following flags at a time: -"
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| 83 | + ", -".join(self.exclusive_flags),
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| 84 | blame_loc=cmd_val.arg_locs[0])
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| 85 | return 1
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| 86 | else:
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| 87 | found = True
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| 88 | if found and not arg_r.AtEnd():
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| 89 | self.errfmt.Print_(
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| 90 | "error: cannot mix bind commands with the following flags: -" +
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| 91 | ", -".join(self.exclusive_flags),
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| 92 | blame_loc=cmd_val.arg_locs[0])
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| 93 | return 1
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| 94 |
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| 95 | arg = arg_types.bind(attrs.attrs)
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| 96 | # print("arg:\n", arg)
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| 97 | # print("dir(arg):\n", dir(arg))
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| 98 | # for prop in dir(arg):
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| 99 | # if not prop.startswith('__'):
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| 100 | # value = getattr(arg, prop)
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| 101 | # print("Property: {0}, Value: {1}".format(prop, value))
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| 102 | # print("arg.m:\n", arg.m)
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| 103 |
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| 104 | try:
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| 105 | with ctx_Keymap(readline, arg.m): # Replicates bind's -m behavior
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| 106 |
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| 107 | # This gauntlet of ifs is meant to replicate bash behavior, in case we
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| 108 | # need to relax the mutual exclusion of flags like bash does
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| 109 |
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| 110 | # List names of functions
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| 111 | if arg.l:
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| 112 | readline.list_funmap_names()
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| 113 |
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| 114 | # Print function names and bindings
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| 115 | if arg.p:
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| 116 | readline.function_dumper(True) # reusable as input
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| 117 | if arg.P:
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| 118 | readline.function_dumper(False)
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| 119 |
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| 120 | # Print macros
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| 121 | if arg.s:
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| 122 | readline.macro_dumper(True) # reusable as input
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| 123 | if arg.S:
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| 124 | readline.macro_dumper(False)
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| 125 |
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| 126 | # Print readline variable names
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| 127 | if arg.v:
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| 128 | readline.variable_dumper(True)
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| 129 | if arg.V:
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| 130 | readline.variable_dumper(False)
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| 131 |
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| 132 | if arg.f is not None:
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| 133 | readline.read_init_file(arg.f)
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| 134 |
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| 135 | if arg.q is not None:
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| 136 | readline.query_bindings(arg.q)
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| 137 |
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| 138 | if arg.u is not None:
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| 139 | readline.unbind_rl_function(arg.u)
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| 140 |
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| 141 | if arg.r is not None:
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| 142 | readline.unbind_keyseq(arg.r)
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| 143 |
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| 144 | if arg.x is not None:
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| 145 | self.errfmt.Print_("warning: bind -x isn't implemented",
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| 146 | blame_loc=cmd_val.arg_locs[0])
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| 147 | return 1
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| 148 |
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| 149 | if arg.X:
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| 150 | readline.print_shell_cmd_map()
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| 151 |
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| 152 | bindings, arg_locs = arg_r.Rest2()
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| 153 | #log('bindings %d locs %d', len(arg_r.argv), len(arg_r.locs))
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| 154 |
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| 155 | for i, binding in enumerate(bindings):
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| 156 | try:
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| 157 | #log("Binding %s (%d)", binding, i)
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| 158 | #log("Arg loc %s (%d)", arg_locs[i], i)
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| 159 | readline.parse_and_bind(binding)
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| 160 | except ValueError as e:
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| 161 | msg = e.message # type: str
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| 162 | self.errfmt.Print_("bind error: %s" % msg, arg_locs[i])
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| 163 | return 1
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| 164 |
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| 165 | except ValueError as e:
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| 166 | # only print out the exception message if non-empty
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| 167 | # some bash bind errors return non-zero, but print to stdout
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| 168 | # temp var to work around mycpp runtime limitation
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| 169 | msg2 = e.message # type: str
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| 170 | if msg2 is not None and len(msg2) > 0:
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| 171 | self.errfmt.Print_("bind error: %s" % msg2, loc.Missing)
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| 172 | return 1
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| 173 |
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| 174 | return 0
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| 175 |
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| 176 |
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| 177 | class History(vm._Builtin):
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| 178 | """Show interactive command history."""
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| 179 |
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| 180 | def __init__(
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| 181 | self,
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| 182 | readline, # type: Optional[Readline]
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| 183 | sh_files, # type: sh_init.ShellFiles
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| 184 | errfmt, # type: ui.ErrorFormatter
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| 185 | f, # type: mylib.Writer
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| 186 | ):
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| 187 | # type: (...) -> None
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| 188 | self.readline = readline
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| 189 | self.sh_files = sh_files
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| 190 | self.errfmt = errfmt
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| 191 | self.f = f # this hook is for unit testing only
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| 192 |
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| 193 | def Run(self, cmd_val):
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| 194 | # type: (cmd_value.Argv) -> int
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| 195 | # NOTE: This builtin doesn't do anything in non-interactive mode in bash?
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| 196 | # It silently exits zero.
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| 197 | # zsh -c 'history' produces an error.
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| 198 | readline = self.readline
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| 199 | if not readline:
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| 200 | e_usage("is disabled because Oils wasn't compiled with 'readline'",
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| 201 | loc.Missing)
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| 202 |
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| 203 | attrs, arg_r = flag_util.ParseCmdVal('history', cmd_val)
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| 204 | arg = arg_types.history(attrs.attrs)
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| 205 |
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| 206 | # Clear all history
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| 207 | if arg.c:
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| 208 | readline.clear_history()
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| 209 | return 0
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| 210 |
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| 211 | if arg.a:
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| 212 | hist_file = self.sh_files.HistoryFile()
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| 213 | if hist_file is None:
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| 214 | return 1
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| 215 |
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| 216 | try:
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| 217 | readline.write_history_file(hist_file)
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| 218 | except (IOError, OSError) as e:
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| 219 | self.errfmt.Print_(
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| 220 | 'Error writing HISTFILE %r: %s' %
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| 221 | (hist_file, pyutil.strerror(e)), loc.Missing)
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| 222 | return 1
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| 223 |
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| 224 | return 0
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| 225 |
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| 226 | if arg.r:
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| 227 | hist_file = self.sh_files.HistoryFile()
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| 228 | if hist_file is None:
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| 229 | return 1
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| 230 |
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| 231 | try:
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| 232 | readline.read_history_file(hist_file)
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| 233 | except (IOError, OSError) as e:
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| 234 | self.errfmt.Print_(
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| 235 | 'Error reading HISTFILE %r: %s' %
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| 236 | (hist_file, pyutil.strerror(e)), loc.Missing)
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| 237 | return 1
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| 238 |
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| 239 | return 0
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| 240 |
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| 241 | # Delete history entry by id number
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| 242 | arg_d = mops.BigTruncate(arg.d)
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| 243 | if arg_d >= 0:
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| 244 | cmd_index = arg_d - 1
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| 245 |
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| 246 | try:
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| 247 | readline.remove_history_item(cmd_index)
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| 248 | except ValueError:
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| 249 | e_usage("couldn't find item %d" % arg_d, loc.Missing)
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| 250 |
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| 251 | return 0
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| 252 |
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| 253 | # Returns 0 items in non-interactive mode?
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| 254 | num_items = readline.get_current_history_length()
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| 255 | #log('len = %d', num_items)
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| 256 |
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| 257 | num_arg, num_arg_loc = arg_r.Peek2()
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| 258 |
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| 259 | if num_arg is None:
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| 260 | start_index = 1
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| 261 | else:
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| 262 | try:
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| 263 | num_to_show = int(num_arg)
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| 264 | except ValueError:
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| 265 | e_usage('got invalid argument %r' % num_arg, num_arg_loc)
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| 266 | start_index = max(1, num_items + 1 - num_to_show)
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| 267 |
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| 268 | arg_r.Next()
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| 269 | if not arg_r.AtEnd():
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| 270 | e_usage('got too many arguments', loc.Missing)
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| 271 |
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| 272 | # TODO:
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| 273 | # - Exclude lines that don't parse from the history! bash and zsh don't do
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| 274 | # that.
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| 275 | # - Consolidate multiline commands.
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| 276 |
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| 277 | for i in xrange(start_index, num_items + 1): # 1-based index
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| 278 | item = readline.get_history_item(i)
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| 279 | self.f.write('%5d %s\n' % (i, item))
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| 280 | return 0
|