| 1 | from __future__ import print_function
|
| 2 |
|
| 3 | from errno import EINTR
|
| 4 |
|
| 5 | from _devbuild.gen.syntax_asdl import loc, loc_t, command_t
|
| 6 | from _devbuild.gen.value_asdl import (value, value_e, value_t, eggex_ops,
|
| 7 | eggex_ops_t, regex_match, RegexMatch,
|
| 8 | Dict_)
|
| 9 | from core import error
|
| 10 | from core.error import e_die
|
| 11 | from display import ui
|
| 12 | from mycpp import mops
|
| 13 | from mycpp import mylib
|
| 14 | from mycpp.mylib import tagswitch, log
|
| 15 | from ysh import regex_translate
|
| 16 |
|
| 17 | from typing import TYPE_CHECKING, cast, Dict, List, Optional
|
| 18 |
|
| 19 | import libc
|
| 20 | import posix_ as posix
|
| 21 |
|
| 22 | _ = log
|
| 23 |
|
| 24 | if TYPE_CHECKING:
|
| 25 | from core import state
|
| 26 |
|
| 27 | if 0:
|
| 28 |
|
| 29 | def PlainDict(d):
|
| 30 | # type: (Dict[str, value_t]) -> Dict_
|
| 31 | """
|
| 32 | Shorthand for "plain old data", i.e. data without behavior
|
| 33 | """
|
| 34 | return Dict_(d, None)
|
| 35 |
|
| 36 |
|
| 37 | def ToInt(val, msg, blame_loc):
|
| 38 | # type: (value_t, str, loc_t) -> int
|
| 39 | UP_val = val
|
| 40 | if val.tag() == value_e.Int:
|
| 41 | val = cast(value.Int, UP_val)
|
| 42 | return mops.BigTruncate(val.i)
|
| 43 |
|
| 44 | raise error.TypeErr(val, msg, blame_loc)
|
| 45 |
|
| 46 |
|
| 47 | def ToFloat(val, msg, blame_loc):
|
| 48 | # type: (value_t, str, loc_t) -> float
|
| 49 | UP_val = val
|
| 50 | if val.tag() == value_e.Float:
|
| 51 | val = cast(value.Float, UP_val)
|
| 52 | return val.f
|
| 53 |
|
| 54 | raise error.TypeErr(val, msg, blame_loc)
|
| 55 |
|
| 56 |
|
| 57 | def ToStr(val, msg, blame_loc):
|
| 58 | # type: (value_t, str, loc_t) -> str
|
| 59 | UP_val = val
|
| 60 | if val.tag() == value_e.Str:
|
| 61 | val = cast(value.Str, UP_val)
|
| 62 | return val.s
|
| 63 |
|
| 64 | raise error.TypeErr(val, msg, blame_loc)
|
| 65 |
|
| 66 |
|
| 67 | def ToList(val, msg, blame_loc):
|
| 68 | # type: (value_t, str, loc_t) -> List[value_t]
|
| 69 | UP_val = val
|
| 70 | if val.tag() == value_e.List:
|
| 71 | val = cast(value.List, UP_val)
|
| 72 | return val.items
|
| 73 |
|
| 74 | raise error.TypeErr(val, msg, blame_loc)
|
| 75 |
|
| 76 |
|
| 77 | def ToDict(val, msg, blame_loc):
|
| 78 | # type: (value_t, str, loc_t) -> Dict[str, value_t]
|
| 79 | UP_val = val
|
| 80 | if val.tag() == value_e.Dict:
|
| 81 | val = cast(Dict_, UP_val)
|
| 82 | return val.d
|
| 83 |
|
| 84 | raise error.TypeErr(val, msg, blame_loc)
|
| 85 |
|
| 86 |
|
| 87 | def ToCommand(val, msg, blame_loc):
|
| 88 | # type: (value_t, str, loc_t) -> command_t
|
| 89 | UP_val = val
|
| 90 | if val.tag() == value_e.Command:
|
| 91 | val = cast(value.Command, UP_val)
|
| 92 | return val.c
|
| 93 |
|
| 94 | raise error.TypeErr(val, msg, blame_loc)
|
| 95 |
|
| 96 |
|
| 97 | def Stringify(val, blame_loc, prefix=''):
|
| 98 | # type: (value_t, loc_t, str) -> str
|
| 99 | """
|
| 100 | Used by
|
| 101 |
|
| 102 | $[x] stringify operator
|
| 103 | @[x] expression splice - each element is stringified
|
| 104 | @x splice value
|
| 105 | """
|
| 106 | if blame_loc is None:
|
| 107 | blame_loc = loc.Missing
|
| 108 |
|
| 109 | UP_val = val
|
| 110 | with tagswitch(val) as case:
|
| 111 | if case(value_e.Str): # trivial case
|
| 112 | val = cast(value.Str, UP_val)
|
| 113 | return val.s
|
| 114 |
|
| 115 | elif case(value_e.Null):
|
| 116 | s = 'null' # JSON spelling
|
| 117 |
|
| 118 | elif case(value_e.Bool):
|
| 119 | val = cast(value.Bool, UP_val)
|
| 120 | s = 'true' if val.b else 'false' # JSON spelling
|
| 121 |
|
| 122 | elif case(value_e.Int):
|
| 123 | val = cast(value.Int, UP_val)
|
| 124 | # e.g. decimal '42', the only sensible representation
|
| 125 | s = mops.ToStr(val.i)
|
| 126 |
|
| 127 | elif case(value_e.Float):
|
| 128 | val = cast(value.Float, UP_val)
|
| 129 | # TODO: what precision does this have?
|
| 130 | # The default could be like awk or Python, and then we also allow
|
| 131 | # ${myfloat %.3f} and more.
|
| 132 | # Python 3 seems to give a few more digits than Python 2 for str(1.0/3)
|
| 133 | s = str(val.f)
|
| 134 |
|
| 135 | elif case(value_e.Eggex):
|
| 136 | val = cast(value.Eggex, UP_val)
|
| 137 | s = regex_translate.AsPosixEre(val) # lazily converts to ERE
|
| 138 |
|
| 139 | elif case(value_e.List):
|
| 140 | raise error.TypeErrVerbose(
|
| 141 | "%sgot a List, which can't be stringified. Perhaps use @ instead of $, or use join()"
|
| 142 | % prefix, blame_loc)
|
| 143 |
|
| 144 | else:
|
| 145 | raise error.TypeErr(
|
| 146 | val, "%sexpected Null, Bool, Int, Float, Eggex" % prefix,
|
| 147 | blame_loc)
|
| 148 |
|
| 149 | return s
|
| 150 |
|
| 151 |
|
| 152 | def ToShellArray(val, blame_loc, prefix=''):
|
| 153 | # type: (value_t, loc_t, str) -> List[str]
|
| 154 | """
|
| 155 | Used by
|
| 156 |
|
| 157 | @[x] expression splice
|
| 158 | @x splice value
|
| 159 |
|
| 160 | Dicts do NOT get spliced, but they iterate over their keys
|
| 161 | So this function NOT use Iterator.
|
| 162 | """
|
| 163 | UP_val = val
|
| 164 | with tagswitch(val) as case2:
|
| 165 | if case2(value_e.List):
|
| 166 | val = cast(value.List, UP_val)
|
| 167 | strs = [] # type: List[str]
|
| 168 | # Note: it would be nice to add the index to the error message
|
| 169 | # prefix, WITHOUT allocating a string for every item
|
| 170 | for item in val.items:
|
| 171 | strs.append(Stringify(item, blame_loc, prefix=prefix))
|
| 172 |
|
| 173 | # I thought about getting rid of this to keep OSH and YSH separate,
|
| 174 | # but:
|
| 175 | # - readarray/mapfile returns bash array (ysh-user-feedback depends on it)
|
| 176 | # - ysh-options tests parse_at too
|
| 177 | elif case2(value_e.BashArray):
|
| 178 | val = cast(value.BashArray, UP_val)
|
| 179 | strs = val.strs
|
| 180 |
|
| 181 | else:
|
| 182 | raise error.TypeErr(val, "%sexpected List" % prefix, blame_loc)
|
| 183 |
|
| 184 | return strs
|
| 185 |
|
| 186 |
|
| 187 | class Iterator(object):
|
| 188 | """Interface for various types of for loop."""
|
| 189 |
|
| 190 | def __init__(self):
|
| 191 | # type: () -> None
|
| 192 | self.i = 0
|
| 193 |
|
| 194 | def Index(self):
|
| 195 | # type: () -> int
|
| 196 | return self.i
|
| 197 |
|
| 198 | def Next(self):
|
| 199 | # type: () -> None
|
| 200 | self.i += 1
|
| 201 |
|
| 202 | def FirstValue(self):
|
| 203 | # type: () -> Optional[value_t]
|
| 204 | """Return a value, or None if done
|
| 205 |
|
| 206 | e.g. return Dict key or List value
|
| 207 | """
|
| 208 | raise NotImplementedError()
|
| 209 |
|
| 210 | def SecondValue(self):
|
| 211 | # type: () -> value_t
|
| 212 | """Return Dict value or FAIL"""
|
| 213 | raise AssertionError("Shouldn't have called this")
|
| 214 |
|
| 215 |
|
| 216 | class StdinIterator(Iterator):
|
| 217 | """ for x in <> { """
|
| 218 |
|
| 219 | def __init__(self, blame_loc):
|
| 220 | # type: (loc_t) -> None
|
| 221 | Iterator.__init__(self)
|
| 222 | self.blame_loc = blame_loc
|
| 223 | self.f = mylib.Stdin()
|
| 224 |
|
| 225 | def FirstValue(self):
|
| 226 | # type: () -> Optional[value_t]
|
| 227 |
|
| 228 | # line, eof = read_osh.ReadLineSlowly(None, with_eol=False)
|
| 229 | try:
|
| 230 | line = self.f.readline()
|
| 231 | except (IOError, OSError) as e: # signals
|
| 232 | if e.errno == EINTR:
|
| 233 | # Caller will can run traps with cmd_ev, like ReadLineSlowly
|
| 234 | return value.Interrupted
|
| 235 | else:
|
| 236 | # For possible errors from f.readline(), see
|
| 237 | # man read
|
| 238 | # man getline
|
| 239 | # e.g.
|
| 240 | # - ENOMEM getline() allocation failure
|
| 241 | # - EISDIR getline() read from directory descriptor!
|
| 242 | #
|
| 243 | # Note: the read builtin returns status 1 for EISDIR.
|
| 244 | #
|
| 245 | # We'll raise a top-level error like Python. (Awk prints a
|
| 246 | # warning message)
|
| 247 | e_die("I/O error in for <> loop: %s" % posix.strerror(e.errno),
|
| 248 | self.blame_loc)
|
| 249 |
|
| 250 | if len(line) == 0:
|
| 251 | return None # Done
|
| 252 | elif line.endswith('\n'):
|
| 253 | # TODO: optimize this to prevent extra garbage
|
| 254 | line = line[:-1]
|
| 255 |
|
| 256 | return value.Str(line)
|
| 257 |
|
| 258 |
|
| 259 | class ArrayIter(Iterator):
|
| 260 | """ for x in 1 2 3 { """
|
| 261 |
|
| 262 | def __init__(self, strs):
|
| 263 | # type: (List[str]) -> None
|
| 264 | Iterator.__init__(self)
|
| 265 | self.strs = strs
|
| 266 | self.n = len(strs)
|
| 267 |
|
| 268 | def FirstValue(self):
|
| 269 | # type: () -> Optional[value_t]
|
| 270 | if self.i == self.n:
|
| 271 | return None
|
| 272 | return value.Str(self.strs[self.i])
|
| 273 |
|
| 274 |
|
| 275 | class RangeIterator(Iterator):
|
| 276 | """ for x in (m:n) { """
|
| 277 |
|
| 278 | def __init__(self, val):
|
| 279 | # type: (value.Range) -> None
|
| 280 | Iterator.__init__(self)
|
| 281 | self.val = val
|
| 282 |
|
| 283 | def FirstValue(self):
|
| 284 | # type: () -> Optional[value_t]
|
| 285 | if self.val.lower + self.i >= self.val.upper:
|
| 286 | return None
|
| 287 |
|
| 288 | # TODO: range should be BigInt too
|
| 289 | return value.Int(mops.IntWiden(self.val.lower + self.i))
|
| 290 |
|
| 291 |
|
| 292 | class ListIterator(Iterator):
|
| 293 | """ for x in (mylist) { """
|
| 294 |
|
| 295 | def __init__(self, val):
|
| 296 | # type: (value.List) -> None
|
| 297 | Iterator.__init__(self)
|
| 298 | self.val = val
|
| 299 | self.n = len(val.items)
|
| 300 |
|
| 301 | def FirstValue(self):
|
| 302 | # type: () -> Optional[value_t]
|
| 303 | if self.i == self.n:
|
| 304 | return None
|
| 305 | return self.val.items[self.i]
|
| 306 |
|
| 307 |
|
| 308 | class DictIterator(Iterator):
|
| 309 | """ for x in (mydict) { """
|
| 310 |
|
| 311 | def __init__(self, val):
|
| 312 | # type: (Dict_) -> None
|
| 313 | Iterator.__init__(self)
|
| 314 |
|
| 315 | # TODO: Don't materialize these Lists
|
| 316 | self.keys = val.d.keys() # type: List[str]
|
| 317 | self.values = val.d.values() # type: List[value_t]
|
| 318 |
|
| 319 | self.n = len(val.d)
|
| 320 | assert self.n == len(self.keys)
|
| 321 |
|
| 322 | def FirstValue(self):
|
| 323 | # type: () -> value_t
|
| 324 | if self.i == self.n:
|
| 325 | return None
|
| 326 | return value.Str(self.keys[self.i])
|
| 327 |
|
| 328 | def SecondValue(self):
|
| 329 | # type: () -> value_t
|
| 330 | return self.values[self.i]
|
| 331 |
|
| 332 |
|
| 333 | def ToBool(val):
|
| 334 | # type: (value_t) -> bool
|
| 335 | """Convert any value to a boolean.
|
| 336 |
|
| 337 | TODO: expose this as Bool(x), like Python's bool(x).
|
| 338 | """
|
| 339 | UP_val = val
|
| 340 | with tagswitch(val) as case:
|
| 341 | if case(value_e.Undef):
|
| 342 | return False
|
| 343 |
|
| 344 | elif case(value_e.Null):
|
| 345 | return False
|
| 346 |
|
| 347 | elif case(value_e.Str):
|
| 348 | val = cast(value.Str, UP_val)
|
| 349 | return len(val.s) != 0
|
| 350 |
|
| 351 | # OLD TYPES
|
| 352 | elif case(value_e.BashArray):
|
| 353 | val = cast(value.BashArray, UP_val)
|
| 354 | return len(val.strs) != 0
|
| 355 |
|
| 356 | elif case(value_e.BashAssoc):
|
| 357 | val = cast(value.BashAssoc, UP_val)
|
| 358 | return len(val.d) != 0
|
| 359 |
|
| 360 | elif case(value_e.Bool):
|
| 361 | val = cast(value.Bool, UP_val)
|
| 362 | return val.b
|
| 363 |
|
| 364 | elif case(value_e.Int):
|
| 365 | val = cast(value.Int, UP_val)
|
| 366 | return not mops.Equal(val.i, mops.BigInt(0))
|
| 367 |
|
| 368 | elif case(value_e.Float):
|
| 369 | val = cast(value.Float, UP_val)
|
| 370 | return val.f != 0.0
|
| 371 |
|
| 372 | elif case(value_e.List):
|
| 373 | val = cast(value.List, UP_val)
|
| 374 | return len(val.items) > 0
|
| 375 |
|
| 376 | elif case(value_e.Dict):
|
| 377 | val = cast(Dict_, UP_val)
|
| 378 | return len(val.d) > 0
|
| 379 |
|
| 380 | else:
|
| 381 | return True # all other types are Truthy
|
| 382 |
|
| 383 |
|
| 384 | def ExactlyEqual(left, right, blame_loc):
|
| 385 | # type: (value_t, value_t, loc_t) -> bool
|
| 386 |
|
| 387 | if left.tag() == value_e.Float or right.tag() == value_e.Float:
|
| 388 | raise error.TypeErrVerbose(
|
| 389 | "Equality isn't defined on Float values (OILS-ERR-202)", blame_loc)
|
| 390 |
|
| 391 | if left.tag() != right.tag():
|
| 392 | return False
|
| 393 |
|
| 394 | UP_left = left
|
| 395 | UP_right = right
|
| 396 | with tagswitch(left) as case:
|
| 397 | if case(value_e.Undef):
|
| 398 | return True # there's only one Undef
|
| 399 |
|
| 400 | elif case(value_e.Null):
|
| 401 | return True # there's only one Null
|
| 402 |
|
| 403 | elif case(value_e.Bool):
|
| 404 | left = cast(value.Bool, UP_left)
|
| 405 | right = cast(value.Bool, UP_right)
|
| 406 | return left.b == right.b
|
| 407 |
|
| 408 | elif case(value_e.Int):
|
| 409 | left = cast(value.Int, UP_left)
|
| 410 | right = cast(value.Int, UP_right)
|
| 411 | return mops.Equal(left.i, right.i)
|
| 412 |
|
| 413 | elif case(value_e.Float):
|
| 414 | raise AssertionError()
|
| 415 |
|
| 416 | elif case(value_e.Str):
|
| 417 | left = cast(value.Str, UP_left)
|
| 418 | right = cast(value.Str, UP_right)
|
| 419 | return left.s == right.s
|
| 420 |
|
| 421 | elif case(value_e.BashArray):
|
| 422 | left = cast(value.BashArray, UP_left)
|
| 423 | right = cast(value.BashArray, UP_right)
|
| 424 | if len(left.strs) != len(right.strs):
|
| 425 | return False
|
| 426 |
|
| 427 | for i in xrange(0, len(left.strs)):
|
| 428 | if left.strs[i] != right.strs[i]:
|
| 429 | return False
|
| 430 |
|
| 431 | return True
|
| 432 |
|
| 433 | elif case(value_e.List):
|
| 434 | left = cast(value.List, UP_left)
|
| 435 | right = cast(value.List, UP_right)
|
| 436 | if len(left.items) != len(right.items):
|
| 437 | return False
|
| 438 |
|
| 439 | for i in xrange(0, len(left.items)):
|
| 440 | if not ExactlyEqual(left.items[i], right.items[i], blame_loc):
|
| 441 | return False
|
| 442 |
|
| 443 | return True
|
| 444 |
|
| 445 | elif case(value_e.BashAssoc):
|
| 446 | left = cast(Dict_, UP_left)
|
| 447 | right = cast(Dict_, UP_right)
|
| 448 | if len(left.d) != len(right.d):
|
| 449 | return False
|
| 450 |
|
| 451 | for k in left.d.keys():
|
| 452 | if k not in right.d or right.d[k] != left.d[k]:
|
| 453 | return False
|
| 454 |
|
| 455 | return True
|
| 456 |
|
| 457 | elif case(value_e.Dict):
|
| 458 | left = cast(Dict_, UP_left)
|
| 459 | right = cast(Dict_, UP_right)
|
| 460 | if len(left.d) != len(right.d):
|
| 461 | return False
|
| 462 |
|
| 463 | for k in left.d.keys():
|
| 464 | if (k not in right.d or
|
| 465 | not ExactlyEqual(right.d[k], left.d[k], blame_loc)):
|
| 466 | return False
|
| 467 |
|
| 468 | return True
|
| 469 |
|
| 470 | raise error.TypeErrVerbose(
|
| 471 | "Can't compare two values of type %s" % ui.ValType(left), blame_loc)
|
| 472 |
|
| 473 |
|
| 474 | def Contains(needle, haystack):
|
| 475 | # type: (value_t, value_t) -> bool
|
| 476 | """Haystack must be a Dict.
|
| 477 |
|
| 478 | We should have mylist->find(x) !== -1 for searching through a List.
|
| 479 | Things with different perf characteristics should look different.
|
| 480 | """
|
| 481 | UP_haystack = haystack
|
| 482 | with tagswitch(haystack) as case:
|
| 483 | if case(value_e.Dict):
|
| 484 | haystack = cast(Dict_, UP_haystack)
|
| 485 | s = ToStr(needle, "LHS of 'in' should be Str", loc.Missing)
|
| 486 | return s in haystack.d
|
| 487 |
|
| 488 | else:
|
| 489 | raise error.TypeErr(haystack, "RHS of 'in' should be Dict",
|
| 490 | loc.Missing)
|
| 491 |
|
| 492 | return False
|
| 493 |
|
| 494 |
|
| 495 | def MatchRegex(left, right, mem):
|
| 496 | # type: (value_t, value_t, Optional[state.Mem]) -> bool
|
| 497 | """
|
| 498 | Args:
|
| 499 | mem: Whether to set or clear matches
|
| 500 | """
|
| 501 | UP_right = right
|
| 502 |
|
| 503 | with tagswitch(right) as case:
|
| 504 | if case(value_e.Str): # plain ERE
|
| 505 | right = cast(value.Str, UP_right)
|
| 506 |
|
| 507 | right_s = right.s
|
| 508 | regex_flags = 0
|
| 509 | capture = eggex_ops.No # type: eggex_ops_t
|
| 510 |
|
| 511 | elif case(value_e.Eggex):
|
| 512 | right = cast(value.Eggex, UP_right)
|
| 513 |
|
| 514 | right_s = regex_translate.AsPosixEre(right)
|
| 515 | regex_flags = regex_translate.LibcFlags(right.canonical_flags)
|
| 516 | capture = eggex_ops.Yes(right.convert_funcs, right.convert_toks,
|
| 517 | right.capture_names)
|
| 518 |
|
| 519 | else:
|
| 520 | raise error.TypeErr(right, 'Expected Str or Regex for RHS of ~',
|
| 521 | loc.Missing)
|
| 522 |
|
| 523 | UP_left = left
|
| 524 | left_s = None # type: str
|
| 525 | with tagswitch(left) as case:
|
| 526 | if case(value_e.Str):
|
| 527 | left = cast(value.Str, UP_left)
|
| 528 | left_s = left.s
|
| 529 | else:
|
| 530 | raise error.TypeErrVerbose('LHS must be a string', loc.Missing)
|
| 531 |
|
| 532 | indices = libc.regex_search(right_s, regex_flags, left_s, 0)
|
| 533 | if indices is not None:
|
| 534 | if mem:
|
| 535 | mem.SetRegexMatch(RegexMatch(left_s, indices, capture))
|
| 536 | return True
|
| 537 | else:
|
| 538 | if mem:
|
| 539 | mem.SetRegexMatch(regex_match.No)
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| 540 | return False
|
| 541 |
|
| 542 |
|
| 543 | # vim: sw=4
|