| 1 | """
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| 2 | flag_util.py - API for builtin commands
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| 3 | """
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| 4 | from __future__ import print_function
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| 5 |
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| 6 | from _devbuild.gen.runtime_asdl import cmd_value, ProcArgs
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| 7 | from core.error import e_usage
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| 8 | from frontend import args
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| 9 | from frontend import flag_spec
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| 10 | from mycpp import mylib
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| 11 |
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| 12 | from typing import Tuple, Optional
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| 13 |
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| 14 | if mylib.PYTHON:
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| 15 |
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| 16 | def LookupFlagSpec(name):
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| 17 | # type: (str) -> flag_spec._FlagSpec
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| 18 | return flag_spec.FLAG_SPEC[name]
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| 19 |
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| 20 | def LookupFlagSpec2(name):
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| 21 | # type: (str) -> flag_spec._FlagSpecAndMore
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| 22 | return flag_spec.FLAG_SPEC_AND_MORE[name]
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| 23 |
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| 24 |
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| 25 | def _DoesNotAccept(proc_args):
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| 26 | # type: (Optional[ProcArgs]) -> None
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| 27 | """ Copy from frontend/typed_args.py, to break dependency """
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| 28 | if proc_args is not None:
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| 29 | e_usage('got unexpected typed args', proc_args.typed_args.left)
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| 30 |
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| 31 |
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| 32 | def ParseCmdVal(spec_name, cmd_val, accept_typed_args=False):
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| 33 | # type: (str, cmd_value.Argv, bool) -> Tuple[args._Attributes, args.Reader]
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| 34 |
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| 35 | if not accept_typed_args:
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| 36 | _DoesNotAccept(cmd_val.proc_args)
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| 37 |
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| 38 | assert len(cmd_val.argv) == len(cmd_val.arg_locs), cmd_val.argv
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| 39 | arg_r = args.Reader(cmd_val.argv, locs=cmd_val.arg_locs)
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| 40 | arg_r.Next() # move past the builtin name
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| 41 |
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| 42 | spec = LookupFlagSpec(spec_name)
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| 43 | return args.Parse(spec, arg_r), arg_r
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| 44 |
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| 45 |
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| 46 | def ParseLikeEcho(spec_name, cmd_val):
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| 47 | # type: (str, cmd_value.Argv) -> Tuple[args._Attributes, args.Reader]
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| 48 |
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| 49 | _DoesNotAccept(cmd_val.proc_args)
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| 50 |
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| 51 | arg_r = args.Reader(cmd_val.argv, locs=cmd_val.arg_locs)
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| 52 | arg_r.Next() # move past the builtin name
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| 53 |
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| 54 | spec = LookupFlagSpec(spec_name)
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| 55 | return args.ParseLikeEcho(spec, arg_r), arg_r
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| 56 |
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| 57 |
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| 58 | def Parse(spec_name, arg_r):
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| 59 | # type: (str, args.Reader) -> args._Attributes
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| 60 | """Parse argv using a given FlagSpec."""
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| 61 | spec = LookupFlagSpec(spec_name)
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| 62 | return args.Parse(spec, arg_r)
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| 63 |
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| 64 |
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| 65 | def ParseMore(spec_name, arg_r):
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| 66 | # type: (str, args.Reader) -> args._Attributes
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| 67 | """Parse argv using a given FlagSpecAndMore."""
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| 68 | spec = LookupFlagSpec2(spec_name)
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| 69 | return args.ParseMore(spec, arg_r)
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