| 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 | from core import error
|
| 9 | from core.error import e_die
|
| 10 | from core import ui
|
| 11 | from mycpp import mops
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| 12 | from mycpp import mylib
|
| 13 | from mycpp.mylib import tagswitch, log
|
| 14 | from ysh import regex_translate
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| 15 |
|
| 16 | from typing import TYPE_CHECKING, cast, Dict, List, Optional
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| 17 |
|
| 18 | import libc
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| 19 | import posix_ as posix
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| 20 |
|
| 21 | _ = log
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| 22 |
|
| 23 | if TYPE_CHECKING:
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| 24 | from core import state
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| 25 |
|
| 26 |
|
| 27 | def ToInt(val, msg, blame_loc):
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| 28 | # type: (value_t, str, loc_t) -> int
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| 29 | UP_val = val
|
| 30 | if val.tag() == value_e.Int:
|
| 31 | val = cast(value.Int, UP_val)
|
| 32 | return mops.BigTruncate(val.i)
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| 33 |
|
| 34 | raise error.TypeErr(val, msg, blame_loc)
|
| 35 |
|
| 36 |
|
| 37 | def ToFloat(val, msg, blame_loc):
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| 38 | # type: (value_t, str, loc_t) -> float
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| 39 | UP_val = val
|
| 40 | if val.tag() == value_e.Float:
|
| 41 | val = cast(value.Float, UP_val)
|
| 42 | return val.f
|
| 43 |
|
| 44 | raise error.TypeErr(val, msg, blame_loc)
|
| 45 |
|
| 46 |
|
| 47 | def ToStr(val, msg, blame_loc):
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| 48 | # type: (value_t, str, loc_t) -> str
|
| 49 | UP_val = val
|
| 50 | if val.tag() == value_e.Str:
|
| 51 | val = cast(value.Str, UP_val)
|
| 52 | return val.s
|
| 53 |
|
| 54 | raise error.TypeErr(val, msg, blame_loc)
|
| 55 |
|
| 56 |
|
| 57 | def ToList(val, msg, blame_loc):
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| 58 | # type: (value_t, str, loc_t) -> List[value_t]
|
| 59 | UP_val = val
|
| 60 | if val.tag() == value_e.List:
|
| 61 | val = cast(value.List, UP_val)
|
| 62 | return val.items
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| 63 |
|
| 64 | raise error.TypeErr(val, msg, blame_loc)
|
| 65 |
|
| 66 |
|
| 67 | def ToDict(val, msg, blame_loc):
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| 68 | # type: (value_t, str, loc_t) -> Dict[str, value_t]
|
| 69 | UP_val = val
|
| 70 | if val.tag() == value_e.Dict:
|
| 71 | val = cast(value.Dict, UP_val)
|
| 72 | return val.d
|
| 73 |
|
| 74 | raise error.TypeErr(val, msg, blame_loc)
|
| 75 |
|
| 76 |
|
| 77 | def ToCommand(val, msg, blame_loc):
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| 78 | # type: (value_t, str, loc_t) -> command_t
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| 79 | UP_val = val
|
| 80 | if val.tag() == value_e.Command:
|
| 81 | val = cast(value.Command, UP_val)
|
| 82 | return val.c
|
| 83 |
|
| 84 | raise error.TypeErr(val, msg, blame_loc)
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| 85 |
|
| 86 |
|
| 87 | def Stringify(val, blame_loc, prefix=''):
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| 88 | # type: (value_t, loc_t, str) -> str
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| 89 | """
|
| 90 | Used by
|
| 91 |
|
| 92 | $[x] stringify operator
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| 93 | @[x] expression splice - each element is stringified
|
| 94 | @x splice value
|
| 95 | """
|
| 96 | if blame_loc is None:
|
| 97 | blame_loc = loc.Missing
|
| 98 |
|
| 99 | UP_val = val
|
| 100 | with tagswitch(val) as case:
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| 101 | if case(value_e.Str): # trivial case
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| 102 | val = cast(value.Str, UP_val)
|
| 103 | return val.s
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| 104 |
|
| 105 | elif case(value_e.Null):
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| 106 | s = 'null' # JSON spelling
|
| 107 |
|
| 108 | elif case(value_e.Bool):
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| 109 | val = cast(value.Bool, UP_val)
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| 110 | s = 'true' if val.b else 'false' # JSON spelling
|
| 111 |
|
| 112 | elif case(value_e.Int):
|
| 113 | val = cast(value.Int, UP_val)
|
| 114 | # e.g. decimal '42', the only sensible representation
|
| 115 | s = mops.ToStr(val.i)
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| 116 |
|
| 117 | elif case(value_e.Float):
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| 118 | val = cast(value.Float, UP_val)
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| 119 | # TODO: what precision does this have?
|
| 120 | # The default could be like awk or Python, and then we also allow
|
| 121 | # ${myfloat %.3f} and more.
|
| 122 | # Python 3 seems to give a few more digits than Python 2 for str(1.0/3)
|
| 123 | s = str(val.f)
|
| 124 |
|
| 125 | elif case(value_e.Eggex):
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| 126 | val = cast(value.Eggex, UP_val)
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| 127 | s = regex_translate.AsPosixEre(val) # lazily converts to ERE
|
| 128 |
|
| 129 | elif case(value_e.List):
|
| 130 | raise error.TypeErrVerbose(
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| 131 | "%sgot a List, which can't be stringified. Perhaps use @ instead of $, or use join()"
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| 132 | % prefix, blame_loc)
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| 133 |
|
| 134 | else:
|
| 135 | raise error.TypeErr(
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| 136 | val, "%sexpected Null, Bool, Int, Float, Eggex" % prefix,
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| 137 | blame_loc)
|
| 138 |
|
| 139 | return s
|
| 140 |
|
| 141 |
|
| 142 | def ToShellArray(val, blame_loc, prefix=''):
|
| 143 | # type: (value_t, loc_t, str) -> List[str]
|
| 144 | """
|
| 145 | Used by
|
| 146 |
|
| 147 | @[x] expression splice
|
| 148 | @x splice value
|
| 149 |
|
| 150 | Dicts do NOT get spliced, but they iterate over their keys
|
| 151 | So this function NOT use Iterator.
|
| 152 | """
|
| 153 | UP_val = val
|
| 154 | with tagswitch(val) as case2:
|
| 155 | if case2(value_e.List):
|
| 156 | val = cast(value.List, UP_val)
|
| 157 | strs = [] # type: List[str]
|
| 158 | # Note: it would be nice to add the index to the error message
|
| 159 | # prefix, WITHOUT allocating a string for every item
|
| 160 | for item in val.items:
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| 161 | strs.append(Stringify(item, blame_loc, prefix=prefix))
|
| 162 |
|
| 163 | # I thought about getting rid of this to keep OSH and YSH separate,
|
| 164 | # but:
|
| 165 | # - readarray/mapfile returns bash array (ysh-user-feedback depends on it)
|
| 166 | # - ysh-options tests parse_at too
|
| 167 | elif case2(value_e.BashArray):
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| 168 | val = cast(value.BashArray, UP_val)
|
| 169 | strs = val.strs
|
| 170 |
|
| 171 | else:
|
| 172 | raise error.TypeErr(val, "%sexpected List" % prefix, blame_loc)
|
| 173 |
|
| 174 | return strs
|
| 175 |
|
| 176 |
|
| 177 | class Iterator(object):
|
| 178 | """Interface for various types of for loop."""
|
| 179 |
|
| 180 | def __init__(self):
|
| 181 | # type: () -> None
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| 182 | self.i = 0
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| 183 |
|
| 184 | def Index(self):
|
| 185 | # type: () -> int
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| 186 | return self.i
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| 187 |
|
| 188 | def Next(self):
|
| 189 | # type: () -> None
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| 190 | self.i += 1
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| 191 |
|
| 192 | def FirstValue(self):
|
| 193 | # type: () -> Optional[value_t]
|
| 194 | """Return a value, or None if done
|
| 195 |
|
| 196 | e.g. return Dict key or List value
|
| 197 | """
|
| 198 | raise NotImplementedError()
|
| 199 |
|
| 200 | def SecondValue(self):
|
| 201 | # type: () -> value_t
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| 202 | """Return Dict value or FAIL"""
|
| 203 | raise AssertionError("Shouldn't have called this")
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| 204 |
|
| 205 |
|
| 206 | class StdinIterator(Iterator):
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| 207 | """ for x in <> { """
|
| 208 |
|
| 209 | def __init__(self, blame_loc):
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| 210 | # type: (loc_t) -> None
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| 211 | Iterator.__init__(self)
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| 212 | self.blame_loc = blame_loc
|
| 213 | self.f = mylib.Stdin()
|
| 214 |
|
| 215 | def FirstValue(self):
|
| 216 | # type: () -> Optional[value_t]
|
| 217 |
|
| 218 | # line, eof = read_osh.ReadLineSlowly(None, with_eol=False)
|
| 219 | try:
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| 220 | line = self.f.readline()
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| 221 | except (IOError, OSError) as e: # signals
|
| 222 | if e.errno == EINTR:
|
| 223 | # TODO: return value.Interrupted, so we can run traps
|
| 224 | # with cmd_ev, like ReadLineSlowly
|
| 225 | #log('EINTR')
|
| 226 | return None
|
| 227 | else:
|
| 228 | # For possible errors, see
|
| 229 | # man read
|
| 230 | # man getline
|
| 231 | # e.g.
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| 232 | # - ENOMEM getline() allocation failure
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| 233 | # - EISDIR getline() read from directory descriptor!
|
| 234 | #
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| 235 | # Note: the read builtin returns status 1 for EISDIR.
|
| 236 | #
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| 237 | # We'll raise a top-level error like Python. (Awk prints a
|
| 238 | # warning message)
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| 239 | e_die("I/O error in for <> loop: %s" % posix.strerror(e.errno),
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| 240 | self.blame_loc)
|
| 241 |
|
| 242 | if len(line) == 0:
|
| 243 | return None # Done
|
| 244 | elif line.endswith('\n'):
|
| 245 | # TODO: optimize this to prevent extra garbage
|
| 246 | line = line[:-1]
|
| 247 |
|
| 248 | return value.Str(line)
|
| 249 |
|
| 250 |
|
| 251 | class ArrayIter(Iterator):
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| 252 | """ for x in 1 2 3 { """
|
| 253 |
|
| 254 | def __init__(self, strs):
|
| 255 | # type: (List[str]) -> None
|
| 256 | Iterator.__init__(self)
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| 257 | self.strs = strs
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| 258 | self.n = len(strs)
|
| 259 |
|
| 260 | def FirstValue(self):
|
| 261 | # type: () -> Optional[value_t]
|
| 262 | if self.i == self.n:
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| 263 | return None
|
| 264 | return value.Str(self.strs[self.i])
|
| 265 |
|
| 266 |
|
| 267 | class RangeIterator(Iterator):
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| 268 | """ for x in (m:n) { """
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| 269 |
|
| 270 | def __init__(self, val):
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| 271 | # type: (value.Range) -> None
|
| 272 | Iterator.__init__(self)
|
| 273 | self.val = val
|
| 274 |
|
| 275 | def FirstValue(self):
|
| 276 | # type: () -> Optional[value_t]
|
| 277 | if self.val.lower + self.i >= self.val.upper:
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| 278 | return None
|
| 279 |
|
| 280 | # TODO: range should be BigInt too
|
| 281 | return value.Int(mops.IntWiden(self.val.lower + self.i))
|
| 282 |
|
| 283 |
|
| 284 | class ListIterator(Iterator):
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| 285 | """ for x in (mylist) { """
|
| 286 |
|
| 287 | def __init__(self, val):
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| 288 | # type: (value.List) -> None
|
| 289 | Iterator.__init__(self)
|
| 290 | self.val = val
|
| 291 | self.n = len(val.items)
|
| 292 |
|
| 293 | def FirstValue(self):
|
| 294 | # type: () -> Optional[value_t]
|
| 295 | if self.i == self.n:
|
| 296 | return None
|
| 297 | return self.val.items[self.i]
|
| 298 |
|
| 299 |
|
| 300 | class DictIterator(Iterator):
|
| 301 | """ for x in (mydict) { """
|
| 302 |
|
| 303 | def __init__(self, val):
|
| 304 | # type: (value.Dict) -> None
|
| 305 | Iterator.__init__(self)
|
| 306 |
|
| 307 | # TODO: Don't materialize these Lists
|
| 308 | self.keys = val.d.keys() # type: List[str]
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| 309 | self.values = val.d.values() # type: List[value_t]
|
| 310 |
|
| 311 | self.n = len(val.d)
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| 312 | assert self.n == len(self.keys)
|
| 313 |
|
| 314 | def FirstValue(self):
|
| 315 | # type: () -> value_t
|
| 316 | if self.i == self.n:
|
| 317 | return None
|
| 318 | return value.Str(self.keys[self.i])
|
| 319 |
|
| 320 | def SecondValue(self):
|
| 321 | # type: () -> value_t
|
| 322 | return self.values[self.i]
|
| 323 |
|
| 324 |
|
| 325 | def ToBool(val):
|
| 326 | # type: (value_t) -> bool
|
| 327 | """Convert any value to a boolean.
|
| 328 |
|
| 329 | TODO: expose this as Bool(x), like Python's bool(x).
|
| 330 | """
|
| 331 | UP_val = val
|
| 332 | with tagswitch(val) as case:
|
| 333 | if case(value_e.Undef):
|
| 334 | return False
|
| 335 |
|
| 336 | elif case(value_e.Null):
|
| 337 | return False
|
| 338 |
|
| 339 | elif case(value_e.Str):
|
| 340 | val = cast(value.Str, UP_val)
|
| 341 | return len(val.s) != 0
|
| 342 |
|
| 343 | # OLD TYPES
|
| 344 | elif case(value_e.BashArray):
|
| 345 | val = cast(value.BashArray, UP_val)
|
| 346 | return len(val.strs) != 0
|
| 347 |
|
| 348 | elif case(value_e.BashAssoc):
|
| 349 | val = cast(value.BashAssoc, UP_val)
|
| 350 | return len(val.d) != 0
|
| 351 |
|
| 352 | elif case(value_e.Bool):
|
| 353 | val = cast(value.Bool, UP_val)
|
| 354 | return val.b
|
| 355 |
|
| 356 | elif case(value_e.Int):
|
| 357 | val = cast(value.Int, UP_val)
|
| 358 | return not mops.Equal(val.i, mops.BigInt(0))
|
| 359 |
|
| 360 | elif case(value_e.Float):
|
| 361 | val = cast(value.Float, UP_val)
|
| 362 | return val.f != 0.0
|
| 363 |
|
| 364 | elif case(value_e.List):
|
| 365 | val = cast(value.List, UP_val)
|
| 366 | return len(val.items) > 0
|
| 367 |
|
| 368 | elif case(value_e.Dict):
|
| 369 | val = cast(value.Dict, UP_val)
|
| 370 | return len(val.d) > 0
|
| 371 |
|
| 372 | else:
|
| 373 | return True # all other types are Truthy
|
| 374 |
|
| 375 |
|
| 376 | def ExactlyEqual(left, right, blame_loc):
|
| 377 | # type: (value_t, value_t, loc_t) -> bool
|
| 378 | if left.tag() != right.tag():
|
| 379 | return False
|
| 380 |
|
| 381 | UP_left = left
|
| 382 | UP_right = right
|
| 383 | with tagswitch(left) as case:
|
| 384 | if case(value_e.Undef):
|
| 385 | return True # there's only one Undef
|
| 386 |
|
| 387 | elif case(value_e.Null):
|
| 388 | return True # there's only one Null
|
| 389 |
|
| 390 | elif case(value_e.Bool):
|
| 391 | left = cast(value.Bool, UP_left)
|
| 392 | right = cast(value.Bool, UP_right)
|
| 393 | return left.b == right.b
|
| 394 |
|
| 395 | elif case(value_e.Int):
|
| 396 | left = cast(value.Int, UP_left)
|
| 397 | right = cast(value.Int, UP_right)
|
| 398 | return mops.Equal(left.i, right.i)
|
| 399 |
|
| 400 | elif case(value_e.Float):
|
| 401 | # Note: could provide floatEquals(), and suggest it
|
| 402 | # Suggested idiom is abs(f1 - f2) < 0.1
|
| 403 | raise error.TypeErrVerbose("Equality isn't defined on Float",
|
| 404 | blame_loc)
|
| 405 |
|
| 406 | elif case(value_e.Str):
|
| 407 | left = cast(value.Str, UP_left)
|
| 408 | right = cast(value.Str, UP_right)
|
| 409 | return left.s == right.s
|
| 410 |
|
| 411 | elif case(value_e.BashArray):
|
| 412 | left = cast(value.BashArray, UP_left)
|
| 413 | right = cast(value.BashArray, UP_right)
|
| 414 | if len(left.strs) != len(right.strs):
|
| 415 | return False
|
| 416 |
|
| 417 | for i in xrange(0, len(left.strs)):
|
| 418 | if left.strs[i] != right.strs[i]:
|
| 419 | return False
|
| 420 |
|
| 421 | return True
|
| 422 |
|
| 423 | elif case(value_e.List):
|
| 424 | left = cast(value.List, UP_left)
|
| 425 | right = cast(value.List, UP_right)
|
| 426 | if len(left.items) != len(right.items):
|
| 427 | return False
|
| 428 |
|
| 429 | for i in xrange(0, len(left.items)):
|
| 430 | if not ExactlyEqual(left.items[i], right.items[i], blame_loc):
|
| 431 | return False
|
| 432 |
|
| 433 | return True
|
| 434 |
|
| 435 | elif case(value_e.BashAssoc):
|
| 436 | left = cast(value.Dict, UP_left)
|
| 437 | right = cast(value.Dict, UP_right)
|
| 438 | if len(left.d) != len(right.d):
|
| 439 | return False
|
| 440 |
|
| 441 | for k in left.d.keys():
|
| 442 | if k not in right.d or right.d[k] != left.d[k]:
|
| 443 | return False
|
| 444 |
|
| 445 | return True
|
| 446 |
|
| 447 | elif case(value_e.Dict):
|
| 448 | left = cast(value.Dict, UP_left)
|
| 449 | right = cast(value.Dict, UP_right)
|
| 450 | if len(left.d) != len(right.d):
|
| 451 | return False
|
| 452 |
|
| 453 | for k in left.d.keys():
|
| 454 | if (k not in right.d or
|
| 455 | not ExactlyEqual(right.d[k], left.d[k], blame_loc)):
|
| 456 | return False
|
| 457 |
|
| 458 | return True
|
| 459 |
|
| 460 | raise error.TypeErrVerbose(
|
| 461 | "Can't compare two values of type %s" % ui.ValType(left), blame_loc)
|
| 462 |
|
| 463 |
|
| 464 | def Contains(needle, haystack):
|
| 465 | # type: (value_t, value_t) -> bool
|
| 466 | """Haystack must be a Dict.
|
| 467 |
|
| 468 | We should have mylist->find(x) !== -1 for searching through a List.
|
| 469 | Things with different perf characteristics should look different.
|
| 470 | """
|
| 471 | UP_haystack = haystack
|
| 472 | with tagswitch(haystack) as case:
|
| 473 | if case(value_e.Dict):
|
| 474 | haystack = cast(value.Dict, UP_haystack)
|
| 475 | s = ToStr(needle, "LHS of 'in' should be Str", loc.Missing)
|
| 476 | return s in haystack.d
|
| 477 |
|
| 478 | else:
|
| 479 | raise error.TypeErr(haystack, "RHS of 'in' should be Dict",
|
| 480 | loc.Missing)
|
| 481 |
|
| 482 | return False
|
| 483 |
|
| 484 |
|
| 485 | def MatchRegex(left, right, mem):
|
| 486 | # type: (value_t, value_t, Optional[state.Mem]) -> bool
|
| 487 | """
|
| 488 | Args:
|
| 489 | mem: Whether to set or clear matches
|
| 490 | """
|
| 491 | UP_right = right
|
| 492 |
|
| 493 | with tagswitch(right) as case:
|
| 494 | if case(value_e.Str): # plain ERE
|
| 495 | right = cast(value.Str, UP_right)
|
| 496 |
|
| 497 | right_s = right.s
|
| 498 | regex_flags = 0
|
| 499 | capture = eggex_ops.No # type: eggex_ops_t
|
| 500 |
|
| 501 | elif case(value_e.Eggex):
|
| 502 | right = cast(value.Eggex, UP_right)
|
| 503 |
|
| 504 | right_s = regex_translate.AsPosixEre(right)
|
| 505 | regex_flags = regex_translate.LibcFlags(right.canonical_flags)
|
| 506 | capture = eggex_ops.Yes(right.convert_funcs, right.convert_toks,
|
| 507 | right.capture_names)
|
| 508 |
|
| 509 | else:
|
| 510 | raise error.TypeErr(right, 'Expected Str or Regex for RHS of ~',
|
| 511 | loc.Missing)
|
| 512 |
|
| 513 | UP_left = left
|
| 514 | left_s = None # type: str
|
| 515 | with tagswitch(left) as case:
|
| 516 | if case(value_e.Str):
|
| 517 | left = cast(value.Str, UP_left)
|
| 518 | left_s = left.s
|
| 519 | else:
|
| 520 | raise error.TypeErrVerbose('LHS must be a string', loc.Missing)
|
| 521 |
|
| 522 | indices = libc.regex_search(right_s, regex_flags, left_s, 0)
|
| 523 | if indices is not None:
|
| 524 | if mem:
|
| 525 | mem.SetRegexMatch(RegexMatch(left_s, indices, capture))
|
| 526 | return True
|
| 527 | else:
|
| 528 | if mem:
|
| 529 | mem.SetRegexMatch(regex_match.No)
|
| 530 | return False
|
| 531 |
|
| 532 |
|
| 533 | # vim: sw=4
|