| 1 | from __future__ import print_function
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| 2 |
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| 3 | from _devbuild.gen.runtime_asdl import scope_e
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| 4 | from _devbuild.gen.syntax_asdl import loc
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| 5 | from _devbuild.gen.value_asdl import (value, value_e)
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| 6 |
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| 7 | from core import error
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| 8 | from core import state
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| 9 | from core import ui
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| 10 | from core import vm
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| 11 | from frontend import args
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| 12 | from frontend import flag_util
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| 13 | from mycpp.mylib import log
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| 14 |
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| 15 | from typing import Dict, cast, TYPE_CHECKING
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| 16 | if TYPE_CHECKING:
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| 17 | from _devbuild.gen.runtime_asdl import cmd_value
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| 18 | from core import optview
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| 19 |
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| 20 | _ = log
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| 21 |
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| 22 |
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| 23 | class IsMain(vm._Builtin):
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| 24 | """is-main builtin.
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| 25 | """
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| 26 |
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| 27 | def __init__(self, mem):
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| 28 | # type: (state.Mem) -> None
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| 29 | self.mem = mem
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| 30 |
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| 31 | def Run(self, cmd_val):
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| 32 | # type: (cmd_value.Argv) -> int
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| 33 | return 0 if self.mem.is_main else 1
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| 34 |
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| 35 |
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| 36 | class SourceGuard(vm._Builtin):
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| 37 | """source-guard builtin.
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| 38 |
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| 39 | source-guard main || return
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| 40 | """
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| 41 |
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| 42 | def __init__(self, guards, exec_opts, errfmt):
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| 43 | # type: (Dict[str, bool], optview.Exec, ui.ErrorFormatter) -> None
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| 44 | self.guards = guards
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| 45 | self.exec_opts = exec_opts
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| 46 | self.errfmt = errfmt
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| 47 |
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| 48 | def Run(self, cmd_val):
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| 49 | # type: (cmd_value.Argv) -> int
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| 50 | _, arg_r = flag_util.ParseCmdVal('source-guard', cmd_val)
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| 51 | name, _ = arg_r.ReadRequired2('requires a name')
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| 52 | #log('guards %s', self.guards)
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| 53 | if name in self.guards:
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| 54 | # already defined
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| 55 | if self.exec_opts.redefine_module():
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| 56 | self.errfmt.PrintMessage(
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| 57 | '(interactive) Reloading source file %r' % name)
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| 58 | return 0
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| 59 | else:
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| 60 | return 1
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| 61 | self.guards[name] = True
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| 62 | return 0
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| 63 |
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| 64 |
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| 65 | class Use(vm._Builtin):
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| 66 | """use bin, use dialect to control the 'first word'.
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| 67 |
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| 68 | Examples:
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| 69 | use bin grep sed
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| 70 |
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| 71 | use dialect ninja # I think it must be in a 'dialect' scope
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| 72 | use dialect travis
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| 73 | """
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| 74 |
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| 75 | def __init__(self, mem, errfmt):
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| 76 | # type: (state.Mem, ui.ErrorFormatter) -> None
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| 77 | self.mem = mem
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| 78 | self.errfmt = errfmt
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| 79 |
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| 80 | def Run(self, cmd_val):
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| 81 | # type: (cmd_value.Argv) -> int
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| 82 | arg_r = args.Reader(cmd_val.argv, locs=cmd_val.arg_locs)
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| 83 | arg_r.Next() # skip 'use'
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| 84 |
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| 85 | arg, arg_loc = arg_r.Peek2()
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| 86 | if arg is None:
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| 87 | raise error.Usage("expected 'bin' or 'dialect'", loc.Missing)
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| 88 | arg_r.Next()
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| 89 |
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| 90 | if arg == 'dialect':
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| 91 | expected, e_loc = arg_r.Peek2()
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| 92 | if expected is None:
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| 93 | raise error.Usage('expected dialect name', loc.Missing)
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| 94 |
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| 95 | UP_actual = self.mem.GetValue('_DIALECT', scope_e.Dynamic)
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| 96 | if UP_actual.tag() == value_e.Str:
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| 97 | actual = cast(value.Str, UP_actual).s
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| 98 | if actual == expected:
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| 99 | return 0 # OK
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| 100 | else:
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| 101 | self.errfmt.Print_('Expected dialect %r, got %r' %
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| 102 | (expected, actual),
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| 103 | blame_loc=e_loc)
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| 104 |
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| 105 | return 1
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| 106 | else:
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| 107 | # Not printing expected value
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| 108 | self.errfmt.Print_('Expected dialect %r' % expected,
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| 109 | blame_loc=e_loc)
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| 110 | return 1
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| 111 |
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| 112 | # 'use bin' can be used for static analysis. Although could it also
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| 113 | # simplify the SearchPath logic? Maybe ensure that it is memoized?
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| 114 | if arg == 'bin':
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| 115 | rest = arg_r.Rest()
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| 116 | for name in rest:
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| 117 | log('bin %s', name)
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| 118 | return 0
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| 119 |
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| 120 | raise error.Usage("expected 'bin' or 'dialect'", arg_loc)
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