giscanner/scannermain.py

   1 #!/usr/bin/env python
   2 # -*- Mode: Python -*-
   3 # GObject-Introspection - a framework for introspecting GObject libraries
   4 # Copyright (C) 2008-2010 Johan Dahlin
   5 # Copyright (C) 2009 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU General Public License
   9 # as published by the Free Software Foundation; either version 2
  10 # of the License, or (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 # 02110-1301, USA.
  21 #
  22
  23 import errno
  24 import optparse
  25 import os
  26 import shutil
  27 import subprocess
  28 import sys
  29 import tempfile
  30
  31 from giscanner import message
  32 from giscanner.annotationparser import AnnotationParser
  33 from giscanner.ast import Include, Namespace
  34 from giscanner.dumper import compile_introspection_binary
  35 from giscanner.gdumpparser import GDumpParser, IntrospectionBinary
  36 from giscanner.introspectablepass import IntrospectablePass
  37 from giscanner.girparser import GIRParser
  38 from giscanner.girwriter import GIRWriter
  39 from giscanner.maintransformer import MainTransformer
  40 from giscanner.shlibs import resolve_shlibs
  41 from giscanner.sourcescanner import SourceScanner
  42 from giscanner.transformer import Transformer
  43 from . import utils
  44
  45 def get_preprocessor_option_group(parser):
  46     group = optparse.OptionGroup(parser, "Preprocessor options")
  47     group.add_option("-I", help="Pre-processor include file",
  48                      action="append", dest="cpp_includes",
  49                      default=[])
  50     group.add_option("-D", help="Pre-processor define",
  51                      action="append", dest="cpp_defines",
  52                      default=[])
  53     group.add_option("-U", help="Pre-processor undefine",
  54                      action="append", dest="cpp_undefines",
  55                      default=[])
  56     group.add_option("-p", dest="", help="Ignored")
  57     return group
  58
  59 def get_windows_option_group(parser):
  60     group = optparse.OptionGroup(parser, "Machine Dependent Options")
  61     group.add_option("-m", help="some machine dependent option",
  62                      action="append", dest='m_option',
  63                      default=[])
  64
  65     return group
  66
  67 def _get_option_parser():
  68     parser = optparse.OptionParser('%prog [options] sources')
  69     parser.add_option('', "--quiet",
  70                       action="store_true", dest="quiet",
  71                       default=False,
  72                       help="If passed, do not print details of normal" \
  73                           + " operation")
  74     parser.add_option("", "--format",
  75                       action="store", dest="format",
  76                       default="gir",
  77                       help="format to use, one of gidl, gir")
  78     parser.add_option("-i", "--include",
  79                       action="append", dest="includes", default=[],
  80                       help="Add specified gir file as dependency")
  81     parser.add_option("", "--include-uninstalled",
  82                       action="append", dest="includes_uninstalled", default=[],
  83                       help=("""A file path to a dependency; only use this "
  84                             "when building multiple .gir files inside a "
  85                             "single module."""))
  86     parser.add_option("", "--add-include-path",
  87                       action="append", dest="include_paths", default=[],
  88                       help="include paths for other GIR files")
  89     parser.add_option("", "--program",
  90                       action="store", dest="program", default=None,
  91                       help="program to execute")
  92     parser.add_option("", "--program-arg",
  93                       action="append", dest="program_args", default=[],
  94                       help="extra arguments to program")
  95     parser.add_option("", "--libtool",
  96                       action="store", dest="libtool_path", default=None,
  97                       help="full path to libtool")
  98     parser.add_option("", "--no-libtool",
  99                       action="store_true", dest="nolibtool", default=False,
 100                       help="do not use libtool")
 101     parser.add_option("", "--external-library",
 102                       action="store_true", dest="external_library", default=False,
 103                       help=("""If true, the library is located on the system,""" +
 104                             """not in the current directory"""))
 105     parser.add_option("-l", "--library",
 106                       action="append", dest="libraries", default=[],
 107                       help="libraries of this unit")
 108     parser.add_option("-L", "--library-path",
 109                       action="append", dest="library_paths", default=[],
 110                       help="directories to search for libraries")
 111     parser.add_option("", "--header-only",
 112                       action="store_true", dest="header_only", default=[],
 113                       help="If specified, just generate a GIR for the given header files")
 114     parser.add_option("-n", "--namespace",
 115                       action="store", dest="namespace_name",
 116                       help=("name of namespace for this unit, also "
 117                             "used to compute --identifier-prefix and --symbol-prefix"))
 118     parser.add_option("", "--nsversion",
 119                       action="store", dest="namespace_version",
 120                       help="version of namespace for this unit")
 121     parser.add_option("", "--strip-prefix",
 122                       action="store", dest="strip_prefix",
 123                       help="""Option --strip-prefix is deprecated, please see --identifier-prefix
 124 and --symbol-prefix.""")
 125     parser.add_option("", "--identifier-prefix",
 126                       action="append", dest="identifier_prefixes", default=[],
 127                       help="""Remove this prefix from C identifiers (structure typedefs, etc.).
 128 May be specified multiple times.  This is also used as the default for --symbol-prefix if
 129 the latter is not specified.""")
 130     parser.add_option("", "--symbol-prefix",
 131                       action="append", dest="symbol_prefixes", default=[],
 132                       help="Remove this prefix from C symbols (function names)")
 133     parser.add_option("", "--accept-unprefixed",
 134                       action="store_true", dest="accept_unprefixed", default=False,
 135                       help="""If specified, accept symbols and identifiers that do not
 136 match the namespace prefix.""")
 137     parser.add_option("", "--add-init-section",
 138                       action="append", dest="init_sections", default=[],
 139             help="add extra initialization code in the introspection program")
 140     parser.add_option("-o", "--output",
 141                       action="store", dest="output", default="-",
 142                       help="output filename to write to, defaults to - (stdout)")
 143     parser.add_option("", "--pkg",
 144                       action="append", dest="packages", default=[],
 145                       help="pkg-config packages to get cflags from")
 146     parser.add_option("", "--pkg-export",
 147                       action="append", dest="packages_export", default=[],
 148                       help="Associated pkg-config packages for this library")
 149     parser.add_option('', "--warn-all",
 150                       action="store_true", dest="warn_all", default=False,
 151                       help="If true, enable all warnings for introspection")
 152     parser.add_option('', "--warn-error",
 153                       action="store_true", dest="warn_fatal",
 154                       help="Turn warnings into fatal errors")
 155     parser.add_option("-v", "--verbose",
 156                       action="store_true", dest="verbose",
 157                       help="be verbose")
 158     parser.add_option("", "--c-include",
 159                       action="append", dest="c_includes", default=[],
 160                       help="headers which should be included in C programs")
 161     parser.add_option("", "--filelist",
 162                       action="store", dest="filelist", default=[],
 163                       help="file containing headers and sources to be scanned")
 164
 165     group = get_preprocessor_option_group(parser)
 166     parser.add_option_group(group)
 167
 168     if os.environ.get('MSYSTEM') == 'MINGW32':
 169         group = get_windows_option_group(parser)
 170         parser.add_option_group(group)
 171
 172     # Private options
 173     parser.add_option('', "--generate-typelib-tests",
 174                       action="store", dest="test_codegen", default=None,
 175                       help=optparse.SUPPRESS_HELP)
 176     parser.add_option('', "--passthrough-gir",
 177                       action="store", dest="passthrough_gir", default=None,
 178                       help=optparse.SUPPRESS_HELP)
 179     parser.add_option('', "--reparse-validate",
 180                       action="store_true", dest="reparse_validate_gir", default=False,
 181                       help=optparse.SUPPRESS_HELP)
 182     parser.add_option("", "--typelib-xml",
 183                       action="store_true", dest="typelib_xml",
 184                       help=optparse.SUPPRESS_HELP)
 185
 186     return parser
 187
 188
 189 def _error(msg):
 190     raise SystemExit('ERROR: %s' % (msg, ))
 191
 192 def passthrough_gir(path, f):
 193     parser = GIRParser()
 194     parser.parse(path)
 195
 196     writer = GIRWriter(parser.get_namespace(),
 197                        parser.get_shared_libraries(),
 198                        parser.get_includes(),
 199                        parser.get_pkgconfig_packages(),
 200                        parser.get_c_includes())
 201     f.write(writer.get_xml())
 202
 203 def test_codegen(optstring):
 204     (namespace, out_h_filename, out_c_filename) = optstring.split(',')
 205     if namespace == 'Everything':
 206         from .testcodegen import EverythingCodeGenerator
 207         gen = EverythingCodeGenerator(out_h_filename, out_c_filename)
 208         gen.write()
 209     else:
 210         _error("Invaild namespace %r" % (namespace, ))
 211     return 0
 212
 213 def process_options(output, allowed_flags):
 214     for option in output.split():
 215         for flag in allowed_flags:
 216             if not option.startswith(flag):
 217                 continue
 218             yield option
 219             break
 220
 221 def process_packages(options, packages):
 222     args = ['pkg-config', '--cflags']
 223     args.extend(packages)
 224     output = subprocess.Popen(args,
 225                               stdout=subprocess.PIPE).communicate()[0]
 226     if output is None:
 227         # the error output should have already appeared on our stderr,
 228         # so we just exit
 229         return 1
 230     # Some pkg-config files on Windows have options we don't understand,
 231     # so we explicitly filter to only the ones we need.
 232     options_whitelist = ['-I', '-D', '-U', '-l', '-L']
 233     filtered_output = list(process_options(output, options_whitelist))
 234     parser = _get_option_parser()
 235     pkg_options, unused = parser.parse_args(filtered_output)
 236     options.cpp_includes.extend(pkg_options.cpp_includes)
 237     options.cpp_defines.extend(pkg_options.cpp_defines)
 238     options.cpp_undefines.extend(pkg_options.cpp_undefines)
 239
 240 def extract_filenames(args):
 241     filenames = []
 242     for arg in args:
 243         # We don't support real C++ parsing yet, but we should be able
 244         # to understand C API implemented in C++ files.
 245         if (arg.endswith('.c') or arg.endswith('.cpp') or
 246             arg.endswith('.cc') or arg.endswith('.cxx') or
 247             arg.endswith('.h') or arg.endswith('.hpp') or
 248             arg.endswith('.hxx')):
 249             if not os.path.exists(arg):
 250                 _error('%s: no such a file or directory' % (arg, ))
 251             # Make absolute, because we do comparisons inside scannerparser.c
 252             # against the absolute path that cpp will give us
 253             filenames.append(os.path.abspath(arg))
 254     return filenames
 255
 256 def extract_filelist(options):
 257     filenames = []
 258     if not os.path.exists(options.filelist):
 259         _error('%s: no such filelist file' % (options.filelist, ))
 260     filelist_file = open(options.filelist, "r")
 261     lines = filelist_file.readlines()
 262     for line in lines:
 263         # We don't support real C++ parsing yet, but we should be able
 264         # to understand C API implemented in C++ files.
 265         filename = line.strip()
 266         if (filename.endswith('.c') or filename.endswith('.cpp') or
 267             filename.endswith('.cc') or filename.endswith('.cxx') or
 268             filename.endswith('.h') or filename.endswith('.hpp') or
 269             filename.endswith('.hxx')):
 270             if not os.path.exists(filename):
 271                 _error('%s: Invalid filelist entry-no such file or directory' % (line, ))
 272             # Make absolute, because we do comparisons inside scannerparser.c
 273             # against the absolute path that cpp will give us
 274             filenames.append(os.path.abspath(filename))
 275     return filenames
 276
 277 def create_namespace(options):
 278     if options.strip_prefix:
 279         print """g-ir-scanner: warning: Option --strip-prefix has been deprecated;
 280 see --identifier-prefix and --symbol-prefix."""
 281         options.identifier_prefixes.append(options.strip_prefix)
 282
 283     # We do this dance because the empty list has different semantics from
 284     # None; if the user didn't specify the options, we want to use None so
 285     # the Namespace constructor picks the defaults.
 286     if options.identifier_prefixes:
 287         identifier_prefixes = options.identifier_prefixes
 288     else:
 289         identifier_prefixes = None
 290     if options.symbol_prefixes:
 291         for prefix in options.symbol_prefixes:
 292             # See Transformer._split_c_string_for_namespace_matches() for
 293             # why this check is needed
 294             if prefix.lower() != prefix:
 295                 _error("Values for --symbol-prefix must be entirely lowercase")
 296         symbol_prefixes = options.symbol_prefixes
 297     else:
 298         symbol_prefixes = None
 299
 300     return Namespace(options.namespace_name,
 301                      options.namespace_version,
 302                      identifier_prefixes=identifier_prefixes,
 303                      symbol_prefixes=symbol_prefixes)
 304
 305 def create_transformer(namespace, options):
 306     transformer = Transformer(namespace,
 307                               accept_unprefixed=options.accept_unprefixed)
 308     transformer.set_include_paths(options.include_paths)
 309     if options.passthrough_gir:
 310         transformer.disable_cache()
 311         transformer.set_passthrough_mode()
 312
 313     for include in options.includes:
 314         if os.sep in include:
 315             _error("Invalid include path %r" % (include, ))
 316         try:
 317             include_obj = Include.from_string(include)
 318         except:
 319             _error("Malformed include %r\n" % (include, ))
 320         transformer.register_include(include_obj)
 321     for include_path in options.includes_uninstalled:
 322         transformer.register_include_uninstalled(include_path)
 323
 324     return transformer
 325
 326 def create_binary(transformer, options, args):
 327     # Transform the C AST nodes into higher level
 328     # GLib/GObject nodes
 329     gdump_parser = GDumpParser(transformer)
 330
 331     # Do enough parsing that we have the get_type() functions to reference
 332     # when creating the introspection binary
 333     gdump_parser.init_parse()
 334
 335     if options.program:
 336         args=[options.program]
 337         args.extend(options.program_args)
 338         binary = IntrospectionBinary(args)
 339     else:
 340         binary = compile_introspection_binary(options,
 341                                               gdump_parser.get_get_type_functions(),
 342                                               gdump_parser.get_error_quark_functions())
 343
 344     shlibs = resolve_shlibs(options, binary, options.libraries)
 345     gdump_parser.set_introspection_binary(binary)
 346     gdump_parser.parse()
 347     return shlibs
 348
 349 def create_source_scanner(options, args):
 350     if hasattr(options, 'filelist') and options.filelist:
 351         filenames = extract_filelist(options)
 352     else:
 353         filenames = extract_filenames(args)
 354
 355     # Run the preprocessor, tokenize and construct simple
 356     # objects representing the raw C symbols
 357     ss = SourceScanner()
 358     ss.set_cpp_options(options.cpp_includes,
 359                        options.cpp_defines,
 360                        options.cpp_undefines)
 361     ss.parse_files(filenames)
 362     ss.parse_macros(filenames)
 363     return ss
 364
 365 def write_output(data, options):
 366     if options.output == "-":
 367         output = sys.stdout
 368     elif options.reparse_validate_gir:
 369         main_f, main_f_name = tempfile.mkstemp(suffix='.gir')
 370         main_f = os.fdopen(main_f, 'w')
 371         main_f.write(data)
 372         main_f.close()
 373
 374         temp_f, temp_f_name = tempfile.mkstemp(suffix='.gir')
 375         temp_f = os.fdopen(temp_f, 'w')
 376         passthrough_gir(main_f_name, temp_f)
 377         temp_f.close()
 378         if not utils.files_are_identical(main_f_name, temp_f_name):
 379             _error("Failed to re-parse gir file; scanned=%r passthrough=%r" % (
 380                 main_f_name, temp_f_name))
 381         os.unlink(temp_f_name)
 382         try:
 383             shutil.move(main_f_name, options.output)
 384         except OSError, e:
 385             if e.errno == errno.EPERM:
 386                 os.unlink(main_f_name)
 387                 return 0
 388             raise
 389         return 0
 390     else:
 391         try:
 392             output = open(options.output, "w")
 393         except IOError, e:
 394             _error("opening output for writing: %s" % (e.strerror, ))
 395
 396     try:
 397         output.write(data)
 398     except IOError, e:
 399         _error("while writing output: %s" % (e.strerror, ))
 400
 401 def scanner_main(args):
 402     parser = _get_option_parser()
 403     (options, args) = parser.parse_args(args)
 404
 405     if options.passthrough_gir:
 406         passthrough_gir(options.passthrough_gir, sys.stdout)
 407     if options.test_codegen:
 408         return test_codegen(options.test_codegen)
 409
 410     if hasattr(options, 'filelist') and not options.filelist:
 411         if len(args) <= 1:
 412             _error('Need at least one filename')
 413
 414     if not options.namespace_name:
 415         _error('Namespace name missing')
 416
 417     if options.format == 'gir':
 418         from giscanner.girwriter import GIRWriter as Writer
 419     else:
 420         _error("Unknown format: %s" % (options.format, ))
 421
 422     if not (options.libraries
 423             or options.program
 424             or options.header_only):
 425         _error("Must specify --program or --library")
 426
 427     namespace = create_namespace(options)
 428     logger = message.MessageLogger.get(namespace=namespace)
 429     if options.warn_all:
 430         logger.enable_warnings(True)
 431     transformer = create_transformer(namespace, options)
 432
 433     packages = set(options.packages)
 434     packages.update(transformer.get_pkgconfig_packages())
 435     if packages:
 436         exit_code = process_packages(options, packages)
 437         if exit_code:
 438             return exit_code
 439
 440     ss = create_source_scanner(options, args)
 441
 442     ap = AnnotationParser()
 443     blocks = ap.parse(ss.get_comments())
 444
 445     # Transform the C symbols into AST nodes
 446     transformer.set_annotations(blocks)
 447     transformer.parse(ss.get_symbols())
 448
 449     if not options.header_only:
 450         shlibs = create_binary(transformer, options, args)
 451     else:
 452         shlibs = []
 453
 454     main = MainTransformer(transformer, blocks)
 455     main.transform()
 456
 457     utils.break_on_debug_flag('tree')
 458
 459     final = IntrospectablePass(transformer, blocks)
 460     final.validate()
 461
 462     warning_count = logger.get_warning_count()
 463     if options.warn_fatal and warning_count > 0:
 464         message.fatal("warnings configured as fatal")
 465         return 1
 466     elif warning_count > 0 and options.warn_all is False:
 467         print ("g-ir-scanner: %s: warning: %d warnings suppressed (use --warn-all to see them)"
 468                % (transformer.namespace.name, warning_count, ))
 469
 470     # Write out AST
 471     if options.packages_export:
 472         exported_packages = options.packages_export
 473     else:
 474         exported_packages = options.packages
 475
 476     writer = Writer(transformer.namespace, shlibs, transformer.get_includes(),
 477                     exported_packages, options.c_includes)
 478     data = writer.get_xml()
 479
 480     write_output(data, options)
 481
 482     return 0