| 1 | #!/usr/bin/env python2
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| 2 | """
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| 3 | meta_ysh.py - Builtins for introspection
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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.runtime_asdl import cmd_value
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| 8 | from core import error
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| 9 | from core.error import e_usage
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| 10 | from core import vm
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| 11 | from frontend import flag_spec
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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 |
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| 17 | _ = log
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| 18 |
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| 19 | from typing import TYPE_CHECKING
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| 20 | if TYPE_CHECKING:
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| 21 | from core import state
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| 22 | from core import ui
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| 23 |
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| 24 |
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| 25 | class Shvm(vm._Builtin):
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| 26 | """
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| 27 | shvm cell x - move pp cell x here
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| 28 | shvm gc-stats - like OILS_GC_STATS
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| 29 | shvm guts (x+y) - ASDL pretty printing
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| 30 | - similar to = x+y, but not stable
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| 31 |
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| 32 | Related:
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| 33 | _vm->heapId(obj) - a heap ID that can be used to detect cycles for
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| 34 | serialization
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| 35 | """
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| 36 |
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| 37 | def __init__(
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| 38 | self,
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| 39 | mem, # type: state.Mem
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| 40 | errfmt, # type: ui.ErrorFormatter
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| 41 | ):
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| 42 | # type: (...) -> None
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| 43 | self.mem = mem
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| 44 | self.errfmt = errfmt
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| 45 | self.stdout_ = mylib.Stdout()
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| 46 |
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| 47 | def Run(self, cmd_val):
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| 48 | # type: (cmd_value.Argv) -> int
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| 49 |
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| 50 | arg, arg_r = flag_spec.ParseCmdVal('shvm', cmd_val)
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| 51 |
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| 52 | action, action_loc = arg_r.ReadRequired2(
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| 53 | 'expected an action (cell, gc-stats, guts)')
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| 54 |
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| 55 | if action == 'cell':
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| 56 | argv, locs = arg_r.Rest2()
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| 57 |
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| 58 | status = 0
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| 59 | for i, name in enumerate(argv):
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| 60 | if name.startswith(':'):
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| 61 | name = name[1:]
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| 62 |
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| 63 | if not match.IsValidVarName(name):
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| 64 | raise error.Usage('got invalid variable name %r' % name,
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| 65 | locs[i])
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| 66 |
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| 67 | cell = self.mem.GetCell(name)
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| 68 | if cell is None:
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| 69 | self.errfmt.Print_("Couldn't find a variable named %r" %
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| 70 | name,
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| 71 | blame_loc=locs[i])
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| 72 | status = 1
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| 73 | else:
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| 74 | self.stdout_.write('%s = ' % name)
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| 75 | if mylib.PYTHON:
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| 76 | cell.PrettyPrint() # may be color
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| 77 |
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| 78 | self.stdout_.write('\n')
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| 79 |
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| 80 | elif action == 'gc-stats':
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| 81 | # mylib.PrintGcStats()
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| 82 | print('TODO')
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| 83 | status = 0
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| 84 |
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| 85 | elif action == 'guts':
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| 86 | # Print the value
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| 87 | print('TODO')
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| 88 |
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| 89 | if cmd_val.typed_args: # eval (myblock)
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| 90 | rd = typed_args.ReaderForProc(cmd_val)
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| 91 | val = rd.PosValue()
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| 92 | rd.Done()
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| 93 | if mylib.PYTHON:
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| 94 | print(val)
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| 95 |
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| 96 | status = 0
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| 97 |
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| 98 | else:
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| 99 | e_usage('got invalid action %r' % action, action_loc)
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| 100 |
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| 101 | return status
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