| 1 | from __future__ import print_function
|
| 2 |
|
| 3 | from _devbuild.gen.option_asdl import option_i
|
| 4 | from _devbuild.gen.id_kind_asdl import Id
|
| 5 | from _devbuild.gen.runtime_asdl import cmd_value, CommandStatus
|
| 6 | from _devbuild.gen.syntax_asdl import loc, loc_t, expr, expr_e
|
| 7 | from _devbuild.gen.value_asdl import value, value_e
|
| 8 | from core import error
|
| 9 | from core.error import e_die_status, e_usage
|
| 10 | from core import executor
|
| 11 | from core import num
|
| 12 | from core import state
|
| 13 | from display import ui
|
| 14 | from core import vm
|
| 15 | from frontend import flag_util
|
| 16 | from frontend import typed_args
|
| 17 | from mycpp import mops
|
| 18 | from mycpp import mylib
|
| 19 | from mycpp.mylib import tagswitch, log
|
| 20 | from ysh import val_ops
|
| 21 |
|
| 22 | _ = log
|
| 23 |
|
| 24 | from typing import Any, cast, TYPE_CHECKING
|
| 25 | if TYPE_CHECKING:
|
| 26 | from display import ui
|
| 27 | from osh import cmd_eval
|
| 28 | from ysh import expr_eval
|
| 29 |
|
| 30 |
|
| 31 | class ctx_Try(object):
|
| 32 |
|
| 33 | def __init__(self, mutable_opts):
|
| 34 | # type: (state.MutableOpts) -> None
|
| 35 |
|
| 36 | mutable_opts.Push(option_i.errexit, True)
|
| 37 | self.mutable_opts = mutable_opts
|
| 38 |
|
| 39 | def __enter__(self):
|
| 40 | # type: () -> None
|
| 41 | pass
|
| 42 |
|
| 43 | def __exit__(self, type, value, traceback):
|
| 44 | # type: (Any, Any, Any) -> None
|
| 45 | self.mutable_opts.Pop(option_i.errexit)
|
| 46 |
|
| 47 |
|
| 48 | class Try(vm._Builtin):
|
| 49 | """Allows explicit handling of errors.
|
| 50 |
|
| 51 | Takes command argv, or a block:
|
| 52 |
|
| 53 | try ls /bad
|
| 54 |
|
| 55 | try {
|
| 56 | var x = 1 / 0
|
| 57 |
|
| 58 | ls | wc -l
|
| 59 |
|
| 60 | diff <(sort left.txt) <(sort right.txt)
|
| 61 | }
|
| 62 |
|
| 63 | TODO:
|
| 64 | - Set _error_str (e.UserErrorString())
|
| 65 | - Set _error_location
|
| 66 | - These could be used by a 'raise' builtin? Or 'reraise'
|
| 67 |
|
| 68 | try {
|
| 69 | foo
|
| 70 | }
|
| 71 | if (_status !== 0) {
|
| 72 | echo 'hello'
|
| 73 | raise # reads _status, _error_str, and _error_location ?
|
| 74 | }
|
| 75 | """
|
| 76 |
|
| 77 | def __init__(
|
| 78 | self,
|
| 79 | mutable_opts, # type: state.MutableOpts
|
| 80 | mem, # type: state.Mem
|
| 81 | cmd_ev, # type: cmd_eval.CommandEvaluator
|
| 82 | shell_ex, # type: vm._Executor
|
| 83 | errfmt, # type: ui.ErrorFormatter
|
| 84 | ):
|
| 85 | # type: (...) -> None
|
| 86 | self.mutable_opts = mutable_opts
|
| 87 | self.mem = mem
|
| 88 | self.shell_ex = shell_ex
|
| 89 | self.cmd_ev = cmd_ev
|
| 90 | self.errfmt = errfmt
|
| 91 |
|
| 92 | def Run(self, cmd_val):
|
| 93 | # type: (cmd_value.Argv) -> int
|
| 94 | _, arg_r = flag_util.ParseCmdVal('try_',
|
| 95 | cmd_val,
|
| 96 | accept_typed_args=True)
|
| 97 |
|
| 98 | rd = typed_args.ReaderForProc(cmd_val)
|
| 99 | cmd = rd.RequiredBlock()
|
| 100 | rd.Done()
|
| 101 |
|
| 102 | error_dict = None # type: value.Dict
|
| 103 |
|
| 104 | status = 0 # success by default
|
| 105 | try:
|
| 106 | with ctx_Try(self.mutable_opts):
|
| 107 | unused = self.cmd_ev.EvalCommandFrag(cmd)
|
| 108 | except error.Expr as e:
|
| 109 | status = e.ExitStatus()
|
| 110 | except error.ErrExit as e:
|
| 111 | status = e.ExitStatus()
|
| 112 |
|
| 113 | except error.Structured as e:
|
| 114 | #log('*** STRUC %s', e)
|
| 115 | status = e.ExitStatus()
|
| 116 | error_dict = e.ToDict()
|
| 117 |
|
| 118 | if error_dict is None:
|
| 119 | error_dict = value.Dict({'code': num.ToBig(status)})
|
| 120 |
|
| 121 | # Always set _error
|
| 122 | self.mem.SetTryError(error_dict)
|
| 123 |
|
| 124 | # TODO: remove _status in favor of _error.code. This is marked in
|
| 125 | # spec/TODO-deprecate
|
| 126 | self.mem.SetTryStatus(status)
|
| 127 | return 0
|
| 128 |
|
| 129 |
|
| 130 | class Failed(vm._Builtin):
|
| 131 |
|
| 132 | def __init__(self, mem):
|
| 133 | # type: (state.Mem) -> None
|
| 134 | self.mem = mem
|
| 135 |
|
| 136 | def Run(self, cmd_val):
|
| 137 | # type: (cmd_value.Argv) -> int
|
| 138 | _, arg_r = flag_util.ParseCmdVal('failed', cmd_val)
|
| 139 |
|
| 140 | # No args
|
| 141 | arg_r.Done()
|
| 142 |
|
| 143 | # Should we have
|
| 144 | # failed (_error) ?
|
| 145 |
|
| 146 | err = self.mem.TryError()
|
| 147 | code = err.d.get('code')
|
| 148 | if code is None:
|
| 149 | # No error
|
| 150 | return 1
|
| 151 |
|
| 152 | UP_code = code
|
| 153 | with tagswitch(code) as case:
|
| 154 | if case(value_e.Int):
|
| 155 | code = cast(value.Int, UP_code)
|
| 156 | # return 0 if and only if it failed
|
| 157 | return 1 if mops.Equal(code.i, mops.ZERO) else 0
|
| 158 | else:
|
| 159 | # This should never happen because the interpreter controls the
|
| 160 | # contents of TryError()
|
| 161 | raise AssertionError()
|
| 162 |
|
| 163 |
|
| 164 | class Error(vm._Builtin):
|
| 165 |
|
| 166 | def __init__(self):
|
| 167 | # type: () -> None
|
| 168 | pass
|
| 169 |
|
| 170 | def Run(self, cmd_val):
|
| 171 | # type: (cmd_value.Argv) -> int
|
| 172 | _, arg_r = flag_util.ParseCmdVal('error',
|
| 173 | cmd_val,
|
| 174 | accept_typed_args=True)
|
| 175 |
|
| 176 | message = arg_r.Peek()
|
| 177 | if message is None:
|
| 178 | raise error.Usage('expected a message to display',
|
| 179 | cmd_val.arg_locs[0])
|
| 180 |
|
| 181 | rd = typed_args.ReaderForProc(cmd_val)
|
| 182 | # Status 10 is distinct from what the Oils interpreter itself uses. We
|
| 183 | # use status 3 for expressions and 4 for encode/decode, and 10 "leaves
|
| 184 | # room" for others.
|
| 185 | # The user is of course free to choose status 1.
|
| 186 | status = mops.BigTruncate(rd.NamedInt('code', 10))
|
| 187 |
|
| 188 | # attach rest of named args to _error Dict
|
| 189 | properties = rd.RestNamed()
|
| 190 | rd.Done()
|
| 191 |
|
| 192 | if status == 0:
|
| 193 | raise error.Usage('status must be a non-zero integer',
|
| 194 | cmd_val.arg_locs[0])
|
| 195 |
|
| 196 | raise error.Structured(status, message, cmd_val.arg_locs[0],
|
| 197 | properties)
|
| 198 |
|
| 199 |
|
| 200 | class BoolStatus(vm._Builtin):
|
| 201 |
|
| 202 | def __init__(self, shell_ex, errfmt):
|
| 203 | # type: (vm._Executor, ui.ErrorFormatter) -> None
|
| 204 | self.shell_ex = shell_ex
|
| 205 | self.errfmt = errfmt
|
| 206 |
|
| 207 | def Run(self, cmd_val):
|
| 208 | # type: (cmd_value.Argv) -> int
|
| 209 |
|
| 210 | _, arg_r = flag_util.ParseCmdVal('boolstatus', cmd_val)
|
| 211 |
|
| 212 | if arg_r.Peek() is None:
|
| 213 | e_usage('expected a command to run', loc.Missing)
|
| 214 |
|
| 215 | argv, locs = arg_r.Rest2()
|
| 216 | cmd_val2 = cmd_value.Argv(argv, locs, cmd_val.is_last_cmd,
|
| 217 | cmd_val.self_obj, cmd_val.proc_args)
|
| 218 |
|
| 219 | cmd_st = CommandStatus.CreateNull(alloc_lists=True)
|
| 220 | run_flags = executor.IS_LAST_CMD if cmd_val.is_last_cmd else 0
|
| 221 | status = self.shell_ex.RunSimpleCommand(cmd_val2, cmd_st, run_flags)
|
| 222 |
|
| 223 | if status not in (0, 1):
|
| 224 | e_die_status(status,
|
| 225 | 'boolstatus expected status 0 or 1, got %d' % status,
|
| 226 | locs[0])
|
| 227 |
|
| 228 | return status
|
| 229 |
|
| 230 |
|
| 231 | class Assert(vm._Builtin):
|
| 232 |
|
| 233 | def __init__(self, expr_ev, errfmt):
|
| 234 | # type: (expr_eval.ExprEvaluator, ui.ErrorFormatter) -> None
|
| 235 | self.expr_ev = expr_ev
|
| 236 | self.errfmt = errfmt
|
| 237 | self.f = mylib.Stdout()
|
| 238 |
|
| 239 | def _AssertComparison(self, exp, blame_loc):
|
| 240 | # type: (expr.Compare, loc_t) -> None
|
| 241 |
|
| 242 | # We checked exp.ops
|
| 243 | assert len(exp.comparators) == 1, exp.comparators
|
| 244 |
|
| 245 | expected = self.expr_ev.EvalExpr(exp.left, loc.Missing)
|
| 246 | actual = self.expr_ev.EvalExpr(exp.comparators[0], loc.Missing)
|
| 247 |
|
| 248 | if not val_ops.ExactlyEqual(expected, actual, blame_loc):
|
| 249 | self.f.write('\n')
|
| 250 | # Long values could also show DIFF, rather than wrapping
|
| 251 | # We could have assert --diff or something
|
| 252 | ui.PrettyPrintValue('Expected: ', expected, self.f)
|
| 253 | ui.PrettyPrintValue('Got: ', actual, self.f)
|
| 254 |
|
| 255 | raise error.Expr("Not equal", exp.ops[0])
|
| 256 |
|
| 257 | def _AssertExpression(self, val, blame_loc):
|
| 258 | # type: (value.Expr, loc_t) -> None
|
| 259 |
|
| 260 | # Special case for assert [true === f()]
|
| 261 | exp = val.e
|
| 262 | UP_exp = exp
|
| 263 | with tagswitch(exp) as case:
|
| 264 | if case(expr_e.Compare):
|
| 265 | exp = cast(expr.Compare, UP_exp)
|
| 266 |
|
| 267 | # Only assert [x === y] is treated as special
|
| 268 | # Not assert [x === y === z]
|
| 269 | if len(exp.ops) == 1 and exp.ops[0].id == Id.Expr_TEqual:
|
| 270 | self._AssertComparison(exp, blame_loc)
|
| 271 | return
|
| 272 |
|
| 273 | # Any other expression
|
| 274 | result = self.expr_ev.EvalExpr(val.e, blame_loc)
|
| 275 | b = val_ops.ToBool(result)
|
| 276 | if not b:
|
| 277 | # Don't print the value for something like assert [x < 4]
|
| 278 | #self.f.write('\n')
|
| 279 | #ui.PrettyPrintValue("Expression isn't true: ", result, self.f)
|
| 280 | raise error.Expr("Expression isn't true", blame_loc)
|
| 281 |
|
| 282 | def Run(self, cmd_val):
|
| 283 | # type: (cmd_value.Argv) -> int
|
| 284 |
|
| 285 | _, arg_r = flag_util.ParseCmdVal('assert',
|
| 286 | cmd_val,
|
| 287 | accept_typed_args=True)
|
| 288 |
|
| 289 | rd = typed_args.ReaderForProc(cmd_val)
|
| 290 | val = rd.PosValue()
|
| 291 | rd.Done()
|
| 292 |
|
| 293 | UP_val = val
|
| 294 | with tagswitch(val) as case:
|
| 295 | if case(value_e.Expr): # Destructured assert [true === f()]
|
| 296 | val = cast(value.Expr, UP_val)
|
| 297 | self._AssertExpression(val, rd.LeftParenToken())
|
| 298 | else:
|
| 299 | b = val_ops.ToBool(val)
|
| 300 | if not b:
|
| 301 | # assert (42 === null) should be written
|
| 302 | # assert [42 === null] to get a better error message
|
| 303 | # But show the value anyway
|
| 304 | self.f.write('\n')
|
| 305 | ui.PrettyPrintValue("Value isn't true: ", val, self.f)
|
| 306 | raise error.Expr('assertion', rd.LeftParenToken())
|
| 307 |
|
| 308 | return 0
|