| 1 | #!/usr/bin/env python3
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| 2 | from __future__ import print_function
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| 3 | """
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| 4 | mycpp_main.py - Translate a subset of Python to C++, using MyPy's typed AST.
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| 5 | """
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| 6 |
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| 7 | import optparse
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| 8 | import os
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| 9 | import sys
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| 10 | import time
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| 11 |
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| 12 | START_TIME = time.time() # measure before imports
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| 13 |
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| 14 | # MyPy deps
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| 15 | from mypy.build import build as mypy_build
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| 16 | from mypy.main import process_options
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| 17 |
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| 18 | from mycpp.util import log
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| 19 | from mycpp import translate
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| 20 |
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| 21 | from typing import (List, Optional, Tuple, Any, Iterator, TYPE_CHECKING)
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| 22 |
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| 23 | if TYPE_CHECKING:
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| 24 | from mypy.nodes import MypyFile
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| 25 | from mypy.modulefinder import BuildSource
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| 26 | from mypy.build import BuildResult
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| 27 |
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| 28 |
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| 29 | def Options() -> optparse.OptionParser:
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| 30 | """Returns an option parser instance."""
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| 31 |
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| 32 | p = optparse.OptionParser()
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| 33 | p.add_option('-v',
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| 34 | '--verbose',
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| 35 | dest='verbose',
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| 36 | action='store_true',
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| 37 | default=False,
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| 38 | help='Show details about translation')
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| 39 |
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| 40 | p.add_option('--cc-out',
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| 41 | dest='cc_out',
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| 42 | default=None,
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| 43 | help='.cc file to write to')
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| 44 |
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| 45 | p.add_option('--to-header',
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| 46 | dest='to_header',
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| 47 | action='append',
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| 48 | default=[],
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| 49 | help='Export this module to a header, e.g. frontend.args')
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| 50 |
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| 51 | p.add_option('--header-out',
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| 52 | dest='header_out',
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| 53 | default=None,
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| 54 | help='Write this header')
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| 55 |
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| 56 | p.add_option('--preamble-path',
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| 57 | dest='preamble_path',
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| 58 | default='',
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| 59 | help='#include this path in the generated .cc file')
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| 60 |
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| 61 | p.add_option(
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| 62 | '--stack-roots-warn',
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| 63 | dest='stack_roots_warn',
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| 64 | default=None,
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| 65 | type='int',
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| 66 | help='Emit warnings about functions with too many stack roots')
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| 67 |
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| 68 | p.add_option('--minimize-stack-roots',
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| 69 | dest='minimize_stack_roots',
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| 70 | action='store_true',
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| 71 | default=False,
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| 72 | help='Try to minimize the number of GC stack roots.')
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| 73 |
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| 74 | p.add_option('--no-minimize-stack-roots',
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| 75 | dest='no_minimize_stack_roots',
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| 76 | action='store_true',
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| 77 | default=False,
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| 78 | help='Do NOT minimize the number of GC stack roots.')
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| 79 |
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| 80 | return p
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| 81 |
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| 82 |
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| 83 | # Copied from mypyc/build.py
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| 84 | def get_mypy_config(
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| 85 | paths: List[str],
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| 86 | mypy_options: Optional[List[str]]) -> Tuple[List['BuildSource'], Any]:
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| 87 | """Construct mypy BuildSources and Options from file and options lists"""
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| 88 | # It is kind of silly to do this but oh well
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| 89 | mypy_options = mypy_options or []
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| 90 | mypy_options.append('--')
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| 91 | mypy_options.extend(paths)
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| 92 |
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| 93 | sources, options = process_options(mypy_options)
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| 94 |
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| 95 | options.show_traceback = True
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| 96 | # Needed to get types for all AST nodes
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| 97 | options.export_types = True
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| 98 | # TODO: Support incremental checking
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| 99 | options.incremental = False
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| 100 | # 10/2019: FIX for MyPy 0.730. Not sure why I need this but I do.
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| 101 | options.preserve_asts = True
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| 102 |
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| 103 | # 1/2023: Workaround for conditional import in osh/builtin_comp.py
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| 104 | # Same as devtools/types.sh
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| 105 | options.warn_unused_ignores = False
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| 106 |
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| 107 | for source in sources:
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| 108 | options.per_module_options.setdefault(source.module,
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| 109 | {})['mypyc'] = True
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| 110 |
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| 111 | return sources, options
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| 112 |
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| 113 |
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| 114 | _FIRST = ('asdl.runtime', 'core.vm')
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| 115 |
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| 116 | # should be LAST because they use base classes
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| 117 | _LAST = ('builtin.bracket_osh', 'builtin.completion_osh', 'core.shell')
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| 118 |
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| 119 |
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| 120 | def ModulesToCompile(result: 'BuildResult',
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| 121 | mod_names: List[str]) -> Iterator[Tuple[str, 'MypyFile']]:
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| 122 | # HACK TO PUT asdl/runtime FIRST.
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| 123 | #
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| 124 | # Another fix is to hoist those to the declaration phase? Not sure if that
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| 125 | # makes sense.
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| 126 |
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| 127 | # FIRST files. Somehow the MyPy builder reorders the modules.
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| 128 | for name, module in result.files.items():
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| 129 | if name in _FIRST:
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| 130 | yield name, module
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| 131 |
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| 132 | for name, module in result.files.items():
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| 133 | # Only translate files that were mentioned on the command line
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| 134 | suffix = name.split('.')[-1]
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| 135 | if suffix not in mod_names:
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| 136 | continue
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| 137 |
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| 138 | if name in _FIRST: # We already did these
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| 139 | continue
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| 140 |
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| 141 | if name in _LAST: # We'll do these later
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| 142 | continue
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| 143 |
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| 144 | yield name, module
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| 145 |
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| 146 | # LAST files
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| 147 | for name, module in result.files.items():
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| 148 | if name in _LAST:
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| 149 | yield name, module
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| 150 |
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| 151 |
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| 152 | def _DedupeHack(
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| 153 | to_compile: List[Tuple[str,
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| 154 | 'MypyFile']]) -> List[Tuple[str, 'MypyFile']]:
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| 155 | # Filtering step
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| 156 | filtered = []
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| 157 | seen = set()
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| 158 | for name, module in to_compile:
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| 159 | # HACK: Why do I get oil.asdl.tdop in addition to asdl.tdop?
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| 160 | if name.startswith('oil.'):
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| 161 | name = name[4:]
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| 162 |
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| 163 | # ditto with testpkg.module1
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| 164 | if name.startswith('mycpp.'):
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| 165 | name = name[6:]
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| 166 |
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| 167 | if name not in seen: # remove dupe
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| 168 | filtered.append((name, module))
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| 169 | seen.add(name)
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| 170 | return filtered
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| 171 |
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| 172 |
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| 173 | def main(argv: List[str]) -> int:
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| 174 | timer = translate.Timer(START_TIME)
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| 175 |
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| 176 | # Hack:
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| 177 | mypy_options = [
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| 178 | '--py2',
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| 179 | '--strict',
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| 180 | '--no-implicit-optional',
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| 181 | '--no-strict-optional',
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| 182 | # for consistency?
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| 183 | '--follow-imports=silent',
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| 184 | #'--verbose',
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| 185 | ]
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| 186 |
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| 187 | o = Options()
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| 188 | opts, argv = o.parse_args(argv)
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| 189 | paths = argv[1:] # e.g. asdl/typed_arith_parse.py
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| 190 |
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| 191 | timer.Section('mycpp: LOADING %s', ' '.join(paths))
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| 192 |
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| 193 | #log('\tmycpp: MYPYPATH = %r', os.getenv('MYPYPATH'))
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| 194 |
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| 195 | if 0:
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| 196 | print(opts)
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| 197 | print(paths)
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| 198 | return
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| 199 |
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| 200 | # e.g. asdl/typed_arith_parse.py -> 'typed_arith_parse'
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| 201 | mod_names = [os.path.basename(p) for p in paths]
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| 202 | mod_names = [os.path.splitext(name)[0] for name in mod_names]
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| 203 |
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| 204 | # Ditto
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| 205 | to_header = opts.to_header
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| 206 |
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| 207 | #log('to_header %s', to_header)
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| 208 |
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| 209 | sources, options = get_mypy_config(paths, mypy_options)
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| 210 | if 0:
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| 211 | for source in sources:
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| 212 | log('source %s', source)
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| 213 | log('')
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| 214 | #log('options %s', options)
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| 215 |
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| 216 | #
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| 217 | # Type checking, which builds a Dict[Expression, Type] (12+ seconds)
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| 218 | #
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| 219 | result = mypy_build(sources=sources, options=options)
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| 220 |
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| 221 | if result.errors:
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| 222 | log('')
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| 223 | log('-' * 80)
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| 224 | for e in result.errors:
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| 225 | log(e)
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| 226 | log('-' * 80)
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| 227 | log('')
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| 228 | return 1
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| 229 |
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| 230 | # no-op
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| 231 | if 0:
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| 232 | for name in result.graph:
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| 233 | log('result %s %s', name, result.graph[name])
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| 234 | log('')
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| 235 |
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| 236 | to_compile = list(ModulesToCompile(result, mod_names))
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| 237 | to_compile = _DedupeHack(to_compile)
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| 238 |
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| 239 | if 0:
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| 240 | for name, module in to_compile:
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| 241 | log('to_compile %s', name)
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| 242 | log('')
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| 243 | #import pickle
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| 244 | # can't pickle but now I see deserialize() nodes and stuff
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| 245 | #s = pickle.dumps(module)
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| 246 | #log('%d pickle', len(s))
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| 247 |
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| 248 | if opts.cc_out:
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| 249 | f = open(opts.cc_out, 'w')
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| 250 | else:
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| 251 | f = sys.stdout
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| 252 |
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| 253 | header_f = None
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| 254 | if opts.header_out:
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| 255 | header_f = open(opts.header_out, 'w') # Not closed
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| 256 |
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| 257 | f.write("""\
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| 258 | // This file is GENERATED by mycpp, from Python source code
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| 259 |
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| 260 | """)
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| 261 |
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| 262 | # Awkwardness for Python optparse
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| 263 | minimize_stack_roots = False
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| 264 | if opts.minimize_stack_roots:
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| 265 | minimize_stack_roots = True
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| 266 | if opts.no_minimize_stack_roots:
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| 267 | minimize_stack_roots = False
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| 268 |
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| 269 | return translate.Run(timer,
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| 270 | f,
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| 271 | header_f,
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| 272 | result.types,
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| 273 | to_header,
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| 274 | to_compile,
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| 275 | preamble_path=opts.preamble_path,
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| 276 | stack_roots_warn=opts.stack_roots_warn,
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| 277 | minimize_stack_roots=minimize_stack_roots)
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| 278 |
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| 279 |
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| 280 | if __name__ == '__main__':
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| 281 | try:
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| 282 | sys.exit(main(sys.argv))
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| 283 | except RuntimeError as e:
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| 284 | print('FATAL: %s' % e, file=sys.stderr)
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| 285 | sys.exit(1)
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