| 1 | #!/usr/bin/env python2
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| 2 | """
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| 3 | asdl_main.py - Generate Python and C from ASDL schemas.
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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 | import optparse
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| 8 | import os
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| 9 | import sys
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| 10 |
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| 11 | from asdl import ast
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| 12 | from asdl import front_end
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| 13 | from asdl import gen_cpp
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| 14 | from asdl import gen_python
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| 15 | from asdl import metrics
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| 16 | from asdl.util import log
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| 17 |
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| 18 | from typing import Dict
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| 19 | from typing import Any
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| 20 | from typing import List
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| 21 |
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| 22 | ARG_0 = os.path.basename(sys.argv[0])
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| 23 |
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| 24 |
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| 25 | def Options():
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| 26 | # type: () -> Any
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| 27 | """Returns an option parser instance."""
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| 28 |
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| 29 | p = optparse.OptionParser()
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| 30 | p.add_option('--no-pretty-print-methods',
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| 31 | dest='pretty_print_methods',
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| 32 | action='store_false',
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| 33 | default=True,
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| 34 | help='Whether to generate pretty printing methods')
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| 35 |
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| 36 | # Control Python constructors
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| 37 |
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| 38 | # for hnode.asdl
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| 39 | p.add_option('--py-init-N',
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| 40 | dest='py_init_n',
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| 41 | action='store_true',
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| 42 | default=False,
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| 43 | help='Generate Python __init__ that requires every field')
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| 44 |
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| 45 | # The default, which matches C++
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| 46 | p.add_option(
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| 47 | '--init-zero-N',
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| 48 | dest='init_zero_n',
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| 49 | action='store_true',
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| 50 | default=True,
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| 51 | help='Generate 0 arg and N arg constructors, in Python and C++')
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| 52 |
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| 53 | p.add_option('--abbrev-module',
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| 54 | dest='abbrev_module',
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| 55 | default=None,
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| 56 | help='Import this module to find abbreviations')
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| 57 |
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| 58 | return p
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| 59 |
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| 60 |
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| 61 | def main(argv):
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| 62 | # type: (List[str]) -> None
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| 63 | o = Options()
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| 64 | opts, argv = o.parse_args(argv)
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| 65 |
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| 66 | try:
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| 67 | action = argv[1]
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| 68 | except IndexError:
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| 69 | raise RuntimeError('Action required')
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| 70 |
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| 71 | try:
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| 72 | schema_path = argv[2]
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| 73 | except IndexError:
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| 74 | raise RuntimeError('Schema path required')
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| 75 |
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| 76 | schema_filename = os.path.basename(schema_path)
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| 77 | if opts.abbrev_module:
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| 78 | # Weird Python rule for importing: fromlist needs to be non-empty.
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| 79 | abbrev_mod = __import__(opts.abbrev_module, fromlist=['.'])
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| 80 | else:
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| 81 | abbrev_mod = None
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| 82 |
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| 83 | abbrev_mod_entries = dir(abbrev_mod) if abbrev_mod else []
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| 84 | # e.g. syntax_abbrev
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| 85 | abbrev_ns = opts.abbrev_module.split('.')[-1] if abbrev_mod else None
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| 86 |
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| 87 | if action == 'metrics': # Sum type metrics
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| 88 | with open(schema_path) as f:
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| 89 | schema_ast, _ = front_end.LoadSchema(f)
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| 90 |
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| 91 | v = metrics.MetricsVisitor(sys.stdout)
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| 92 | v.VisitModule(schema_ast)
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| 93 |
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| 94 | elif action == 'closure': # count all types that command_t references
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| 95 | type_name = argv[3]
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| 96 | with open(schema_path) as f:
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| 97 | schema_ast, type_lookup = front_end.LoadSchema(f)
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| 98 |
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| 99 | seen = {} # type: Dict[str, bool]
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| 100 | c = metrics.ClosureWalk(type_lookup, seen)
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| 101 | c.DoModule(schema_ast, type_name)
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| 102 | for name in sorted(seen):
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| 103 | print(name)
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| 104 | log('SHARED (%d): %s', len(c.shared), ' '.join(sorted(c.shared)))
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| 105 |
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| 106 | elif action == 'c': # Generate C code for the lexer
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| 107 | with open(schema_path) as f:
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| 108 | schema_ast, _ = front_end.LoadSchema(f)
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| 109 |
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| 110 | v0 = gen_cpp.CEnumVisitor(sys.stdout)
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| 111 | v0.VisitModule(schema_ast)
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| 112 |
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| 113 | elif action == 'cpp': # Generate C++ code for ASDL schemas
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| 114 | out_prefix = argv[3]
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| 115 |
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| 116 | with open(schema_path) as f:
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| 117 | schema_ast, _ = front_end.LoadSchema(f)
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| 118 |
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| 119 | # asdl/typed_arith.asdl -> typed_arith_asdl
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| 120 | ns = os.path.basename(schema_path).replace('.', '_')
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| 121 |
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| 122 | with open(out_prefix + '.h', 'w') as f:
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| 123 | guard = ns.upper()
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| 124 | f.write("""\
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| 125 | // %s.h is generated by %s
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| 126 |
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| 127 | #ifndef %s
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| 128 | #define %s
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| 129 |
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| 130 | #include <cstdint>
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| 131 | #include "mycpp/runtime.h"
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| 132 |
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| 133 | """ % (out_prefix, ARG_0, guard, guard))
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| 134 |
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| 135 | if opts.pretty_print_methods:
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| 136 | f.write('#include "asdl/cpp_runtime.h"\n')
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| 137 |
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| 138 | for use in schema_ast.uses:
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| 139 | # HACK to work around limitation: we can't "use" simple enums
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| 140 | if use.module_parts == ['frontend', 'id_kind']:
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| 141 | f.write('namespace %s_asdl { typedef uint16_t Id_t; }\n' %
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| 142 | use.module_parts[-1])
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| 143 | continue
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| 144 |
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| 145 | # Forward declarations in the header, like
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| 146 | # namespace syntax_asdl { class command_t; }
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| 147 | # must come BEFORE namespace, so it can't be in the visitor.
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| 148 |
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| 149 | # assume sum type for now!
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| 150 | cpp_names = []
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| 151 | for n in use.type_names:
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| 152 | py_name, _ = ast.TypeNameHeuristic(n)
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| 153 | cpp_names.append('class %s;' % py_name)
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| 154 |
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| 155 | f.write('namespace %s_asdl { %s }\n' %
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| 156 | (use.module_parts[-1], ' '.join(cpp_names)))
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| 157 | f.write('\n')
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| 158 |
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| 159 | for extern in schema_ast.externs:
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| 160 | names = extern.names
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| 161 | type_name = names[-1]
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| 162 | cpp_namespace = names[-2]
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| 163 |
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| 164 | # TODO: This 'extern' feature isn't enough for Oils
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| 165 | # I think we would have to export header to
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| 166 | # _gen/bin/oils_for_unix.mycpp.cc or something
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| 167 | # Does that create circular dependencies?
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| 168 | #
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| 169 | # Or maybe of 'extern' we can have 'include' or something?
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| 170 | # Maybe we need `.pyi` files in MyPy?
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| 171 |
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| 172 | f.write("""\
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| 173 | namespace %s {
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| 174 | class %s {
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| 175 | public:
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| 176 | hnode_t* PrettyTree(bool do_abbrev, Dict<int, bool>* seen);
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| 177 | };
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| 178 | }
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| 179 | """ % (cpp_namespace, type_name))
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| 180 |
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| 181 | f.write("""\
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| 182 | namespace %s {
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| 183 |
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| 184 | // use struct instead of namespace so 'using' works consistently
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| 185 | #define ASDL_NAMES struct
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| 186 |
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| 187 | """ % ns)
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| 188 |
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| 189 | v1 = gen_cpp.ForwardDeclareVisitor(f)
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| 190 | v1.VisitModule(schema_ast)
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| 191 |
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| 192 | debug_info = {} # type: Dict[str, int]
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| 193 | v2 = gen_cpp.ClassDefVisitor(
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| 194 | f,
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| 195 | pretty_print_methods=opts.pretty_print_methods,
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| 196 | debug_info=debug_info)
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| 197 | v2.VisitModule(schema_ast)
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| 198 |
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| 199 | f.write("""
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| 200 | } // namespace %s
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| 201 |
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| 202 | #endif // %s
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| 203 | """ % (ns, guard))
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| 204 |
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| 205 | try:
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| 206 | debug_info_path = argv[4]
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| 207 | except IndexError:
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| 208 | pass
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| 209 | else:
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| 210 | with open(debug_info_path, 'w') as f:
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| 211 | from pprint import pformat
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| 212 | f.write('''\
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| 213 | cpp_namespace = %r
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| 214 | tags_to_types = \\
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| 215 | %s
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| 216 | ''' % (ns, pformat(debug_info)))
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| 217 |
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| 218 | if not opts.pretty_print_methods:
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| 219 | # No .cc file at all
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| 220 | return
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| 221 |
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| 222 | with open(out_prefix + '.cc', 'w') as f:
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| 223 | f.write("""\
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| 224 | // %s.cc is generated by %s
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| 225 |
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| 226 | #include "%s.h"
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| 227 | #include <assert.h>
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| 228 | """ % (out_prefix, ARG_0, out_prefix))
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| 229 |
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| 230 | if abbrev_mod_entries:
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| 231 | # This is somewhat hacky, works for frontend/syntax_abbrev.py and
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| 232 | # prebuilt/frontend/syntax_abbrev.mycpp.h
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| 233 | part0, part1 = opts.abbrev_module.split('.')
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| 234 | f.write("""\
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| 235 | #include "prebuilt/%s/%s.mycpp.h"
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| 236 | """ % (part0, part1))
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| 237 |
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| 238 | f.write("""\
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| 239 | #include "prebuilt/asdl/runtime.mycpp.h" // generated code uses wrappers here
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| 240 | """)
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| 241 |
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| 242 | # To call pretty-printing methods
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| 243 | for use in schema_ast.uses:
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| 244 | f.write('#include "_gen/%s.asdl.h" // "use" in ASDL\n' %
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| 245 | '/'.join(use.module_parts))
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| 246 | # HACK
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| 247 | if use.module_parts == ['frontend', 'id_kind']:
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| 248 | f.write('using id_kind_asdl::Id_str;\n')
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| 249 |
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| 250 | f.write("""\
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| 251 |
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| 252 | // Generated code uses these types
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| 253 | using hnode_asdl::hnode;
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| 254 | using hnode_asdl::Field;
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| 255 | using hnode_asdl::color_e;
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| 256 |
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| 257 | """)
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| 258 |
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| 259 | f.write("""
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| 260 | namespace %s {
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| 261 |
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| 262 | """ % ns)
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| 263 |
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| 264 | v3 = gen_cpp.MethodDefVisitor(
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| 265 | f,
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| 266 | abbrev_ns=abbrev_ns,
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| 267 | abbrev_mod_entries=abbrev_mod_entries)
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| 268 | v3.VisitModule(schema_ast)
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| 269 |
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| 270 | f.write("""
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| 271 | } // namespace %s
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| 272 | """ % ns)
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| 273 |
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| 274 | elif action == 'mypy': # Generated typed MyPy code
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| 275 | with open(schema_path) as f:
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| 276 | schema_ast, _ = front_end.LoadSchema(f)
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| 277 |
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| 278 | f = sys.stdout # type: ignore
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| 279 |
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| 280 | v4 = gen_python.GenMyPyVisitor(
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| 281 | f,
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| 282 | opts.abbrev_module,
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| 283 | abbrev_mod_entries,
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| 284 | pretty_print_methods=opts.pretty_print_methods,
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| 285 | py_init_n=opts.py_init_n)
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| 286 | v4.VisitModule(schema_ast)
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| 287 |
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| 288 | else:
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| 289 | raise RuntimeError('Invalid action %r' % action)
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| 290 |
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| 291 |
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| 292 | if __name__ == '__main__':
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| 293 | try:
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| 294 | main(sys.argv)
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| 295 | except RuntimeError as e:
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| 296 | print('%s: FATAL: %s' % (ARG_0, e), file=sys.stderr)
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| 297 | sys.exit(1)
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