configure.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2001 Google Inc. All Rights Reserved.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 """Script that generates the build.ninja for ninja itself.
  18
  19 Projects that use ninja themselves should either write a similar script
  20 or use a meta-build system that supports Ninja output."""
  21
  22 from __future__ import print_function
  23
  24 from optparse import OptionParser
  25 import os
  26 import pipes
  27 import string
  28 import subprocess
  29 import sys
  30
  31 sourcedir = os.path.dirname(os.path.realpath(__file__))
  32 sys.path.insert(0, os.path.join(sourcedir, 'misc'))
  33 import ninja_syntax
  34
  35
  36 class Platform(object):
  37     """Represents a host/target platform and its specific build attributes."""
  38     def __init__(self, platform):
  39         self._platform = platform
  40         if self._platform is not None:
  41             return
  42         self._platform = sys.platform
  43         if self._platform.startswith('linux'):
  44             self._platform = 'linux'
  45         elif self._platform.startswith('freebsd'):
  46             self._platform = 'freebsd'
  47         elif self._platform.startswith('gnukfreebsd'):
  48             self._platform = 'freebsd'
  49         elif self._platform.startswith('openbsd'):
  50             self._platform = 'openbsd'
  51         elif self._platform.startswith('solaris') or self._platform == 'sunos5':
  52             self._platform = 'solaris'
  53         elif self._platform.startswith('mingw'):
  54             self._platform = 'mingw'
  55         elif self._platform.startswith('win'):
  56             self._platform = 'msvc'
  57         elif self._platform.startswith('bitrig'):
  58             self._platform = 'bitrig'
  59         elif self._platform.startswith('netbsd'):
  60             self._platform = 'netbsd'
  61         elif self._platform.startswith('aix'):
  62             self._platform = 'aix'
  63
  64     @staticmethod
  65     def known_platforms():
  66       return ['linux', 'darwin', 'freebsd', 'openbsd', 'solaris', 'sunos5',
  67               'mingw', 'msvc', 'gnukfreebsd', 'bitrig', 'netbsd', 'aix']
  68
  69     def platform(self):
  70         return self._platform
  71
  72     def is_linux(self):
  73         return self._platform == 'linux'
  74
  75     def is_mingw(self):
  76         return self._platform == 'mingw'
  77
  78     def is_msvc(self):
  79         return self._platform == 'msvc'
  80
  81     def msvc_needs_fs(self):
  82         popen = subprocess.Popen(['cl', '/nologo', '/?'],
  83                                  stdout=subprocess.PIPE,
  84                                  stderr=subprocess.PIPE)
  85         out, err = popen.communicate()
  86         return '/FS ' in str(out)
  87
  88     def is_windows(self):
  89         return self.is_mingw() or self.is_msvc()
  90
  91     def is_solaris(self):
  92         return self._platform == 'solaris'
  93
  94     def is_aix(self):
  95         return self._platform == 'aix'
  96
  97     def uses_usr_local(self):
  98         return self._platform in ('freebsd', 'openbsd', 'bitrig')
  99
 100     def supports_ppoll(self):
 101         return self._platform in ('linux', 'openbsd', 'bitrig')
 102
 103     def supports_ninja_browse(self):
 104         return (not self.is_windows()
 105                 and not self.is_solaris()
 106                 and not self.is_aix())
 107
 108
 109 class Bootstrap:
 110     """API shim for ninja_syntax.Writer that instead runs the commands.
 111
 112     Used to bootstrap Ninja from scratch.  In --bootstrap mode this
 113     class is used to execute all the commands to build an executable.
 114     It also proxies all calls to an underlying ninja_syntax.Writer, to
 115     behave like non-bootstrap mode.
 116     """
 117     def __init__(self, writer, verbose=False):
 118         self.writer = writer
 119         self.verbose = verbose
 120         # Map of variable name => expanded variable value.
 121         self.vars = {}
 122         # Map of rule name => dict of rule attributes.
 123         self.rules = {
 124             'phony': {}
 125         }
 126
 127     def comment(self, text):
 128         return self.writer.comment(text)
 129
 130     def newline(self):
 131         return self.writer.newline()
 132
 133     def variable(self, key, val):
 134         self.vars[key] = self._expand(val)
 135         return self.writer.variable(key, val)
 136
 137     def rule(self, name, **kwargs):
 138         self.rules[name] = kwargs
 139         return self.writer.rule(name, **kwargs)
 140
 141     def build(self, outputs, rule, inputs=None, **kwargs):
 142         ruleattr = self.rules[rule]
 143         cmd = ruleattr.get('command')
 144         if cmd is None:  # A phony rule, for example.
 145             return
 146
 147         # Implement just enough of Ninja variable expansion etc. to
 148         # make the bootstrap build work.
 149         local_vars = {
 150             'in': self._expand_paths(inputs),
 151             'out': self._expand_paths(outputs)
 152         }
 153         for key, val in kwargs.get('variables', []):
 154             local_vars[key] = ' '.join(ninja_syntax.as_list(val))
 155
 156         self._run_command(self._expand(cmd, local_vars))
 157
 158         return self.writer.build(outputs, rule, inputs, **kwargs)
 159
 160     def default(self, paths):
 161         return self.writer.default(paths)
 162
 163     def _expand_paths(self, paths):
 164         """Expand $vars in an array of paths, e.g. from a 'build' block."""
 165         paths = ninja_syntax.as_list(paths)
 166         return ' '.join(map(self._shell_escape, (map(self._expand, paths))))
 167
 168     def _expand(self, str, local_vars={}):
 169         """Expand $vars in a string."""
 170         return ninja_syntax.expand(str, self.vars, local_vars)
 171
 172     def _shell_escape(self, path):
 173         """Quote paths containing spaces."""
 174         return '"%s"' % path if ' ' in path else path
 175
 176     def _run_command(self, cmdline):
 177         """Run a subcommand, quietly.  Prints the full command on error."""
 178         try:
 179             if self.verbose:
 180                 print(cmdline)
 181             subprocess.check_call(cmdline, shell=True)
 182         except subprocess.CalledProcessError:
 183             print('when running: ', cmdline)
 184             raise
 185
 186
 187 parser = OptionParser()
 188 profilers = ['gmon', 'pprof']
 189 parser.add_option('--bootstrap', action='store_true',
 190                   help='bootstrap a ninja binary from nothing')
 191 parser.add_option('--verbose', action='store_true',
 192                   help='enable verbose build')
 193 parser.add_option('--platform',
 194                   help='target platform (' +
 195                        '/'.join(Platform.known_platforms()) + ')',
 196                   choices=Platform.known_platforms())
 197 parser.add_option('--host',
 198                   help='host platform (' +
 199                        '/'.join(Platform.known_platforms()) + ')',
 200                   choices=Platform.known_platforms())
 201 parser.add_option('--debug', action='store_true',
 202                   help='enable debugging extras',)
 203 parser.add_option('--profile', metavar='TYPE',
 204                   choices=profilers,
 205                   help='enable profiling (' + '/'.join(profilers) + ')',)
 206 parser.add_option('--with-gtest', metavar='PATH', help='ignored')
 207 parser.add_option('--with-python', metavar='EXE',
 208                   help='use EXE as the Python interpreter',
 209                   default=os.path.basename(sys.executable))
 210 parser.add_option('--force-pselect', action='store_true',
 211                   help='ppoll() is used by default where available, '
 212                        'but some platforms may need to use pselect instead',)
 213 (options, args) = parser.parse_args()
 214 if args:
 215     print('ERROR: extra unparsed command-line arguments:', args)
 216     sys.exit(1)
 217
 218 platform = Platform(options.platform)
 219 if options.host:
 220     host = Platform(options.host)
 221 else:
 222     host = platform
 223
 224 BUILD_FILENAME = 'build.ninja'
 225 ninja_writer = ninja_syntax.Writer(open(BUILD_FILENAME, 'w'))
 226 n = ninja_writer
 227
 228 if options.bootstrap:
 229     # Make the build directory.
 230     try:
 231         os.mkdir('build')
 232     except OSError:
 233         pass
 234     # Wrap ninja_writer with the Bootstrapper, which also executes the
 235     # commands.
 236     print('bootstrapping ninja...')
 237     n = Bootstrap(n, verbose=options.verbose)
 238
 239 n.comment('This file is used to build ninja itself.')
 240 n.comment('It is generated by ' + os.path.basename(__file__) + '.')
 241 n.newline()
 242
 243 n.variable('ninja_required_version', '1.3')
 244 n.newline()
 245
 246 n.comment('The arguments passed to configure.py, for rerunning it.')
 247 configure_args = sys.argv[1:]
 248 if '--bootstrap' in configure_args:
 249     configure_args.remove('--bootstrap')
 250 n.variable('configure_args', ' '.join(configure_args))
 251 env_keys = set(['CXX', 'AR', 'CFLAGS', 'LDFLAGS'])
 252 configure_env = dict((k, os.environ[k]) for k in os.environ if k in env_keys)
 253 if configure_env:
 254     config_str = ' '.join([k + '=' + pipes.quote(configure_env[k])
 255                            for k in configure_env])
 256     n.variable('configure_env', config_str + '$ ')
 257 n.newline()
 258
 259 CXX = configure_env.get('CXX', 'g++')
 260 objext = '.o'
 261 if platform.is_msvc():
 262     CXX = 'cl'
 263     objext = '.obj'
 264
 265 def src(filename):
 266     return os.path.join('$sourcedir', 'src', filename)
 267 def built(filename):
 268     return os.path.join('$builddir', filename)
 269 def doc(filename):
 270     return os.path.join('$sourcedir', 'doc', filename)
 271 def cc(name, **kwargs):
 272     return n.build(built(name + objext), 'cxx', src(name + '.c'), **kwargs)
 273 def cxx(name, **kwargs):
 274     return n.build(built(name + objext), 'cxx', src(name + '.cc'), **kwargs)
 275 def binary(name):
 276     if platform.is_windows():
 277         exe = name + '.exe'
 278         n.build(name, 'phony', exe)
 279         return exe
 280     return name
 281
 282 n.variable('sourcedir', sourcedir)
 283 n.variable('builddir', 'build')
 284 n.variable('cxx', CXX)
 285 if platform.is_msvc():
 286     n.variable('ar', 'link')
 287 else:
 288     n.variable('ar', configure_env.get('AR', 'ar'))
 289
 290 if platform.is_msvc():
 291     cflags = ['/showIncludes',
 292               '/nologo',  # Don't print startup banner.
 293               '/Zi',  # Create pdb with debug info.
 294               '/W4',  # Highest warning level.
 295               '/WX',  # Warnings as errors.
 296               '/wd4530', '/wd4100', '/wd4706',
 297               '/wd4512', '/wd4800', '/wd4702', '/wd4819',
 298               # Disable warnings about passing "this" during initialization.
 299               '/wd4355',
 300               # Disable warnings about ignored typedef in DbgHelp.h
 301               '/wd4091',
 302               '/GR-',  # Disable RTTI.
 303               # Disable size_t -> int truncation warning.
 304               # We never have strings or arrays larger than 2**31.
 305               '/wd4267',
 306               '/DNOMINMAX', '/D_CRT_SECURE_NO_WARNINGS',
 307               '/D_HAS_EXCEPTIONS=0',
 308               '/DNINJA_PYTHON="%s"' % options.with_python]
 309     if options.bootstrap:
 310         # In bootstrap mode, we have no ninja process to catch /showIncludes
 311         # output.
 312         cflags.remove('/showIncludes')
 313     if platform.msvc_needs_fs():
 314         cflags.append('/FS')
 315     ldflags = ['/DEBUG', '/libpath:$builddir']
 316     if not options.debug:
 317         cflags += ['/Ox', '/DNDEBUG', '/GL']
 318         ldflags += ['/LTCG', '/OPT:REF', '/OPT:ICF']
 319 else:
 320     cflags = ['-g', '-Wall', '-Wextra',
 321               '-Wno-deprecated',
 322               '-Wno-unused-parameter',
 323               '-fno-rtti',
 324               '-fno-exceptions',
 325               '-fvisibility=hidden', '-pipe',
 326               '-Wno-missing-field-initializers',
 327               '-DNINJA_PYTHON="%s"' % options.with_python]
 328     if options.debug:
 329         cflags += ['-D_GLIBCXX_DEBUG', '-D_GLIBCXX_DEBUG_PEDANTIC']
 330         cflags.remove('-fno-rtti')  # Needed for above pedanticness.
 331     else:
 332         cflags += ['-O2', '-DNDEBUG']
 333     try:
 334         proc = subprocess.Popen(
 335             [CXX, '-fdiagnostics-color', '-c', '-x', 'c++', '/dev/null'],
 336             stdout=open(os.devnull, 'wb'), stderr=subprocess.STDOUT)
 337         if proc.wait() == 0:
 338             cflags += ['-fdiagnostics-color']
 339     except:
 340         pass
 341     if platform.is_mingw():
 342         cflags += ['-D_WIN32_WINNT=0x0501']
 343     ldflags = ['-L$builddir']
 344     if platform.uses_usr_local():
 345         cflags.append('-I/usr/local/include')
 346         ldflags.append('-L/usr/local/lib')
 347
 348 libs = []
 349
 350 if platform.is_mingw():
 351     cflags.remove('-fvisibility=hidden');
 352     ldflags.append('-static')
 353 elif platform.is_solaris():
 354     cflags.remove('-fvisibility=hidden')
 355 elif platform.is_aix():
 356     cflags.remove('-fvisibility=hidden')
 357 elif platform.is_msvc():
 358     pass
 359 else:
 360     if options.profile == 'gmon':
 361         cflags.append('-pg')
 362         ldflags.append('-pg')
 363     elif options.profile == 'pprof':
 364         cflags.append('-fno-omit-frame-pointer')
 365         libs.extend(['-Wl,--no-as-needed', '-lprofiler'])
 366
 367 if platform.supports_ppoll() and not options.force_pselect:
 368     cflags.append('-DUSE_PPOLL')
 369 if platform.supports_ninja_browse():
 370     cflags.append('-DNINJA_HAVE_BROWSE')
 371
 372 # Search for generated headers relative to build dir.
 373 cflags.append('-I.')
 374
 375 def shell_escape(str):
 376     """Escape str such that it's interpreted as a single argument by
 377     the shell."""
 378
 379     # This isn't complete, but it's just enough to make NINJA_PYTHON work.
 380     if platform.is_windows():
 381       return str
 382     if '"' in str:
 383         return "'%s'" % str.replace("'", "\\'")
 384     return str
 385
 386 if 'CFLAGS' in configure_env:
 387     cflags.append(configure_env['CFLAGS'])
 388 n.variable('cflags', ' '.join(shell_escape(flag) for flag in cflags))
 389 if 'LDFLAGS' in configure_env:
 390     ldflags.append(configure_env['LDFLAGS'])
 391 n.variable('ldflags', ' '.join(shell_escape(flag) for flag in ldflags))
 392 n.newline()
 393
 394 if platform.is_msvc():
 395     n.rule('cxx',
 396         command='$cxx $cflags -c $in /Fo$out',
 397         description='CXX $out',
 398         deps='msvc'  # /showIncludes is included in $cflags.
 399     )
 400 else:
 401     n.rule('cxx',
 402         command='$cxx -MMD -MT $out -MF $out.d $cflags -c $in -o $out',
 403         depfile='$out.d',
 404         deps='gcc',
 405         description='CXX $out')
 406 n.newline()
 407
 408 if host.is_msvc():
 409     n.rule('ar',
 410            command='lib /nologo /ltcg /out:$out $in',
 411            description='LIB $out')
 412 elif host.is_mingw():
 413     n.rule('ar',
 414            command='cmd /c $ar cqs $out.tmp $in && move /Y $out.tmp $out',
 415            description='AR $out')
 416 else:
 417     n.rule('ar',
 418            command='rm -f $out && $ar crs $out $in',
 419            description='AR $out')
 420 n.newline()
 421
 422 if platform.is_msvc():
 423     n.rule('link',
 424         command='$cxx $in $libs /nologo /link $ldflags /out:$out',
 425         description='LINK $out')
 426 else:
 427     n.rule('link',
 428         command='$cxx $ldflags -o $out $in $libs',
 429         description='LINK $out')
 430 n.newline()
 431
 432 objs = []
 433
 434 if platform.supports_ninja_browse():
 435     n.comment('browse_py.h is used to inline browse.py.')
 436     n.rule('inline',
 437            command='"%s"' % src('inline.sh') + ' $varname < $in > $out',
 438            description='INLINE $out')
 439     n.build(built('browse_py.h'), 'inline', src('browse.py'),
 440             implicit=src('inline.sh'),
 441             variables=[('varname', 'kBrowsePy')])
 442     n.newline()
 443
 444     objs += cxx('browse', order_only=built('browse_py.h'))
 445     n.newline()
 446
 447 n.comment('the depfile parser and ninja lexers are generated using re2c.')
 448 def has_re2c():
 449     try:
 450         proc = subprocess.Popen(['re2c', '-V'], stdout=subprocess.PIPE)
 451         return int(proc.communicate()[0], 10) >= 1103
 452     except OSError:
 453         return False
 454 if has_re2c():
 455     n.rule('re2c',
 456            command='re2c -b -i --no-generation-date -o $out $in',
 457            description='RE2C $out')
 458     # Generate the .cc files in the source directory so we can check them in.
 459     n.build(src('depfile_parser.cc'), 're2c', src('depfile_parser.in.cc'))
 460     n.build(src('lexer.cc'), 're2c', src('lexer.in.cc'))
 461 else:
 462     print("warning: A compatible version of re2c (>= 0.11.3) was not found; "
 463            "changes to src/*.in.cc will not affect your build.")
 464 n.newline()
 465
 466 n.comment('Core source files all build into ninja library.')
 467 for name in ['build',
 468              'build_log',
 469              'clean',
 470              'debug_flags',
 471              'depfile_parser',
 472              'deps_log',
 473              'disk_interface',
 474              'edit_distance',
 475              'eval_env',
 476              'graph',
 477              'graphviz',
 478              'lexer',
 479              'line_printer',
 480              'manifest_parser',
 481              'metrics',
 482              'state',
 483              'util',
 484              'version']:
 485     objs += cxx(name)
 486 if platform.is_windows():
 487     for name in ['subprocess-win32',
 488                  'includes_normalize-win32',
 489                  'msvc_helper-win32',
 490                  'msvc_helper_main-win32']:
 491         objs += cxx(name)
 492     if platform.is_msvc():
 493         objs += cxx('minidump-win32')
 494     objs += cc('getopt')
 495 else:
 496     objs += cxx('subprocess-posix')
 497 if platform.is_msvc():
 498     ninja_lib = n.build(built('ninja.lib'), 'ar', objs)
 499 else:
 500     ninja_lib = n.build(built('libninja.a'), 'ar', objs)
 501 n.newline()
 502
 503 if platform.is_msvc():
 504     libs.append('ninja.lib')
 505 else:
 506     libs.append('-lninja')
 507
 508 if platform.is_aix():
 509     libs.append('-lperfstat')
 510
 511 all_targets = []
 512
 513 n.comment('Main executable is library plus main() function.')
 514 objs = cxx('ninja')
 515 ninja = n.build(binary('ninja'), 'link', objs, implicit=ninja_lib,
 516                 variables=[('libs', libs)])
 517 n.newline()
 518 all_targets += ninja
 519
 520 if options.bootstrap:
 521     # We've built the ninja binary.  Don't run any more commands
 522     # through the bootstrap executor, but continue writing the
 523     # build.ninja file.
 524     n = ninja_writer
 525
 526 n.comment('Tests all build into ninja_test executable.')
 527
 528 objs = []
 529
 530 for name in ['build_log_test',
 531              'build_test',
 532              'clean_test',
 533              'depfile_parser_test',
 534              'deps_log_test',
 535              'disk_interface_test',
 536              'edit_distance_test',
 537              'graph_test',
 538              'lexer_test',
 539              'manifest_parser_test',
 540              'ninja_test',
 541              'state_test',
 542              'subprocess_test',
 543              'test',
 544              'util_test']:
 545     objs += cxx(name)
 546 if platform.is_windows():
 547     for name in ['includes_normalize_test', 'msvc_helper_test']:
 548         objs += cxx(name)
 549
 550 ninja_test = n.build(binary('ninja_test'), 'link', objs, implicit=ninja_lib,
 551                      variables=[('libs', libs)])
 552 n.newline()
 553 all_targets += ninja_test
 554
 555
 556 n.comment('Ancillary executables.')
 557 objs = cxx('build_log_perftest')
 558 all_targets += n.build(binary('build_log_perftest'), 'link', objs,
 559                        implicit=ninja_lib, variables=[('libs', libs)])
 560 objs = cxx('canon_perftest')
 561 all_targets += n.build(binary('canon_perftest'), 'link', objs,
 562                        implicit=ninja_lib, variables=[('libs', libs)])
 563 objs = cxx('depfile_parser_perftest')
 564 all_targets += n.build(binary('depfile_parser_perftest'), 'link', objs,
 565                        implicit=ninja_lib, variables=[('libs', libs)])
 566 objs = cxx('hash_collision_bench')
 567 all_targets += n.build(binary('hash_collision_bench'), 'link', objs,
 568                               implicit=ninja_lib, variables=[('libs', libs)])
 569 objs = cxx('manifest_parser_perftest')
 570 all_targets += n.build(binary('manifest_parser_perftest'), 'link', objs,
 571                               implicit=ninja_lib, variables=[('libs', libs)])
 572 n.newline()
 573
 574 n.comment('Generate a graph using the "graph" tool.')
 575 n.rule('gendot',
 576        command='./ninja -t graph all > $out')
 577 n.rule('gengraph',
 578        command='dot -Tpng $in > $out')
 579 dot = n.build(built('graph.dot'), 'gendot', ['ninja', 'build.ninja'])
 580 n.build('graph.png', 'gengraph', dot)
 581 n.newline()
 582
 583 n.comment('Generate the manual using asciidoc.')
 584 n.rule('asciidoc',
 585        command='asciidoc -b docbook -d book -o $out $in',
 586        description='ASCIIDOC $out')
 587 n.rule('xsltproc',
 588        command='xsltproc --nonet doc/docbook.xsl $in > $out',
 589        description='XSLTPROC $out')
 590 xml = n.build(built('manual.xml'), 'asciidoc', doc('manual.asciidoc'))
 591 manual = n.build(doc('manual.html'), 'xsltproc', xml,
 592                  implicit=doc('style.css'))
 593 n.build('manual', 'phony',
 594         order_only=manual)
 595 n.newline()
 596
 597 n.comment('Generate Doxygen.')
 598 n.rule('doxygen',
 599        command='doxygen $in',
 600        description='DOXYGEN $in')
 601 n.variable('doxygen_mainpage_generator',
 602            src('gen_doxygen_mainpage.sh'))
 603 n.rule('doxygen_mainpage',
 604        command='$doxygen_mainpage_generator $in > $out',
 605        description='DOXYGEN_MAINPAGE $out')
 606 mainpage = n.build(built('doxygen_mainpage'), 'doxygen_mainpage',
 607                    ['README', 'COPYING'],
 608                    implicit=['$doxygen_mainpage_generator'])
 609 n.build('doxygen', 'doxygen', doc('doxygen.config'),
 610         implicit=mainpage)
 611 n.newline()
 612
 613 if not host.is_mingw():
 614     n.comment('Regenerate build files if build script changes.')
 615     n.rule('configure',
 616            command='${configure_env}%s $sourcedir/configure.py $configure_args' %
 617                options.with_python,
 618            generator=True)
 619     n.build('build.ninja', 'configure',
 620             implicit=['$sourcedir/configure.py',
 621                       os.path.normpath('$sourcedir/misc/ninja_syntax.py')])
 622     n.newline()
 623
 624 n.default(ninja)
 625 n.newline()
 626
 627 if host.is_linux():
 628     n.comment('Packaging')
 629     n.rule('rpmbuild',
 630            command="misc/packaging/rpmbuild.sh",
 631            description='Building rpms..')
 632     n.build('rpm', 'rpmbuild')
 633     n.newline()
 634
 635 n.build('all', 'phony', all_targets)
 636
 637 n.close()
 638 print('wrote %s.' % BUILD_FILENAME)
 639
 640 verbose = ''
 641 if options.verbose:
 642     verbose = ' -v'
 643
 644 if options.bootstrap:
 645     print('bootstrap complete.  rebuilding...')
 646     if platform.is_windows():
 647         bootstrap_exe = 'ninja.bootstrap.exe'
 648         if os.path.exists(bootstrap_exe):
 649             os.unlink(bootstrap_exe)
 650         os.rename('ninja.exe', bootstrap_exe)
 651         subprocess.check_call('ninja.bootstrap.exe%s' % verbose, shell=True)
 652     else:
 653         subprocess.check_call('./ninja%s' % verbose, shell=True)