| 1 | from __future__ import print_function
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| 2 |
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| 3 | from _devbuild.gen import arg_types
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| 4 | from _devbuild.gen.id_kind_asdl import Id
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| 5 | from _devbuild.gen.value_asdl import (value, value_t)
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| 6 | from builtin import read_osh
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| 7 | from core import optview
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| 8 | from core import pyos
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| 9 | from core import state
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| 10 | from core import vm
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| 11 | from frontend import flag_util
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| 12 | from frontend import match
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| 13 | from frontend import typed_args
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| 14 | from mycpp import mylib
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| 15 | from mycpp.mylib import log
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| 16 | from osh import word_compile
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| 17 |
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| 18 | import posix_ as posix
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| 19 |
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| 20 | from typing import List, Dict, TYPE_CHECKING
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| 21 | if TYPE_CHECKING:
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| 22 | from _devbuild.gen.runtime_asdl import cmd_value
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| 23 | from display import ui
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| 24 | from osh import cmd_eval
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| 25 |
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| 26 | _ = log
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| 27 |
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| 28 |
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| 29 | class Echo(vm._Builtin):
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| 30 | """echo builtin.
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| 31 |
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| 32 | shopt -s simple_echo disables -e and -n.
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| 33 | """
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| 34 |
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| 35 | def __init__(self, exec_opts):
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| 36 | # type: (optview.Exec) -> None
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| 37 | self.exec_opts = exec_opts
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| 38 | self.f = mylib.Stdout()
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| 39 |
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| 40 | # Reuse this constant instance
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| 41 | self.simple_flag = None # type: arg_types.echo
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| 42 |
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| 43 | def _SimpleFlag(self):
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| 44 | # type: () -> arg_types.echo
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| 45 | """For arg.e and arg.n without parsing."""
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| 46 | if self.simple_flag is None:
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| 47 | attrs = {} # type: Dict[str, value_t]
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| 48 | attrs['e'] = value.Bool(False)
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| 49 | attrs['n'] = value.Bool(False)
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| 50 | self.simple_flag = arg_types.echo(attrs)
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| 51 | return self.simple_flag
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| 52 |
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| 53 | def Run(self, cmd_val):
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| 54 | # type: (cmd_value.Argv) -> int
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| 55 | argv = cmd_val.argv[1:]
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| 56 |
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| 57 | if self.exec_opts.simple_echo():
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| 58 | typed_args.DoesNotAccept(cmd_val.proc_args) # Disallow echo (42)
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| 59 | arg = self._SimpleFlag() # Avoid parsing -e -n
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| 60 | else:
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| 61 | attrs, arg_r = flag_util.ParseLikeEcho('echo', cmd_val)
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| 62 | arg = arg_types.echo(attrs.attrs)
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| 63 | argv = arg_r.Rest()
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| 64 |
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| 65 | backslash_c = False # \c terminates input
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| 66 |
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| 67 | if arg.e:
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| 68 | new_argv = [] # type: List[str]
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| 69 | for a in argv:
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| 70 | parts = [] # type: List[str]
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| 71 | lex = match.EchoLexer(a)
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| 72 | while not backslash_c:
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| 73 | id_, s = lex.Next()
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| 74 | if id_ == Id.Eol_Tok: # Note: This is really a NUL terminator
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| 75 | break
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| 76 |
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| 77 | p = word_compile.EvalCStringToken(id_, s)
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| 78 |
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| 79 | # Unusual behavior: '\c' prints what is there and aborts
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| 80 | # processing!
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| 81 | if p is None:
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| 82 | backslash_c = True
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| 83 | break
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| 84 |
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| 85 | parts.append(p)
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| 86 |
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| 87 | new_argv.append(''.join(parts))
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| 88 | if backslash_c: # no more args either
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| 89 | break
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| 90 |
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| 91 | # Replace it
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| 92 | argv = new_argv
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| 93 |
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| 94 | buf = mylib.BufWriter()
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| 95 |
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| 96 | #log('echo argv %s', argv)
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| 97 | for i, a in enumerate(argv):
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| 98 | if i != 0:
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| 99 | buf.write(' ') # arg separator
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| 100 | buf.write(a)
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| 101 |
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| 102 | if not arg.n and not backslash_c:
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| 103 | buf.write('\n')
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| 104 |
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| 105 | self.f.write(buf.getvalue())
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| 106 | return 0
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| 107 |
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| 108 |
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| 109 | class MapFile(vm._Builtin):
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| 110 | """Mapfile / readarray."""
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| 111 |
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| 112 | def __init__(self, mem, errfmt, cmd_ev):
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| 113 | # type: (state.Mem, ui.ErrorFormatter, cmd_eval.CommandEvaluator) -> None
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| 114 | self.mem = mem
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| 115 | self.errfmt = errfmt
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| 116 | self.cmd_ev = cmd_ev
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| 117 |
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| 118 | def Run(self, cmd_val):
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| 119 | # type: (cmd_value.Argv) -> int
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| 120 | attrs, arg_r = flag_util.ParseCmdVal('mapfile', cmd_val)
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| 121 | arg = arg_types.mapfile(attrs.attrs)
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| 122 |
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| 123 | var_name, _ = arg_r.Peek2()
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| 124 | if var_name is None:
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| 125 | var_name = 'MAPFILE'
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| 126 |
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| 127 | lines = [] # type: List[str]
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| 128 | while True:
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| 129 | # bash uses this slow algorithm; YSH could provide read --all-lines
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| 130 | try:
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| 131 | line, eof = read_osh.ReadLineSlowly(self.cmd_ev,
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| 132 | with_eol=not arg.t)
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| 133 | except pyos.ReadError as e:
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| 134 | self.errfmt.PrintMessage("mapfile: read() error: %s" %
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| 135 | posix.strerror(e.err_num))
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| 136 | return 1
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| 137 | if eof:
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| 138 | break
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| 139 | lines.append(line)
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| 140 |
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| 141 | state.BuiltinSetArray(self.mem, var_name, lines)
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| 142 | return 0
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