tools/gn - external/github.com/flutter/engine - Git at Google

 #!/usr/bin/env python
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

 import argparse
 import subprocess
 import sys
 import os

 SRC_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

 def get_out_dir(args):
     if args.target_os is not None:
         target_dir = [args.target_os]
     else:
         target_dir = ['host']

     runtime_mode = args.runtime_mode
     if args.dynamic and runtime_mode in ['profile', 'release']:
         target_dir.append('dynamic')

     target_dir.append(args.runtime_mode)

     if args.simulator:
         target_dir.append('sim')

     if args.unoptimized:
         target_dir.append('unopt')

     if args.target_os != 'ios' and args.interpreter:
         target_dir.append('interpreter')

     if args.android_cpu != 'arm':
         target_dir.append(args.android_cpu)

     if args.ios_cpu != 'arm64':
         target_dir.append(args.ios_cpu)

     if args.linux_cpu is not None:
       target_dir.append(args.linux_cpu)

     if args.enable_vulkan:
         target_dir.append('vulkan')

     return os.path.join('out', '_'.join(target_dir))

 def to_command_line(gn_args):
     def merge(key, value):
         if type(value) is bool:
             return '%s=%s' % (key, 'true' if value else 'false')
         return '%s="%s"' % (key, value)
     return [merge(x, y) for x, y in gn_args.iteritems()]

 def cpu_for_target_arch(arch):
   if arch in ['ia32', 'arm', 'armv6', 'armv5te', 'mips',
               'simarm', 'simarmv6', 'simarmv5te', 'simmips', 'simdbc',
               'armsimdbc']:
     return 'x86'
   if arch in ['x64', 'arm64', 'simarm64', 'simdbc64', 'armsimdbc64']:
     return 'x64'

 def to_gn_args(args):
     if args.simulator:
         if args.target_os == 'android':
             raise Exception('--simulator is not supported on Android')
         elif args.target_os == 'ios':
             if args.runtime_mode != 'debug':
                 raise Exception('iOS simulator only supports the debug runtime mode')

     if args.target_os != 'android' and args.enable_vulkan:
       raise Exception('--enable-vulkan is only supported on Android')

     runtime_mode = args.runtime_mode
     if args.dynamic and runtime_mode in ['profile', 'release']:
       runtime_mode = 'dynamic_' + runtime_mode

     gn_args = {}

     # Skia GN args.
     gn_args['skia_enable_flutter_defines'] = True # Enable Flutter API guards in Skia.
     gn_args['skia_use_dng_sdk'] = False    # RAW image handling.
     gn_args['skia_use_sfntly'] = False     # PDF handling depedency.
     gn_args['skia_enable_pdf'] = False     # PDF handling.
     gn_args['skia_use_expat'] = args.target_os == 'android'
     gn_args['skia_use_fontconfig'] = False # Use the custom font manager instead.
     gn_args['is_official_build'] = True    # Disable Skia test utilities.

     gn_args['is_debug'] = args.unoptimized
     gn_args['android_full_debug'] = args.target_os == 'android' and args.unoptimized
     gn_args['is_clang'] = not sys.platform.startswith(('cygwin', 'win'))

     gn_args['embedder_for_target'] = args.embedder_for_target

     enable_lto = args.lto
     if args.unoptimized:
       # There is no point in enabling LTO in unoptimized builds.
       enable_lto = False

     if not sys.platform.startswith('win'):
       # The GN arg is not available in the windows toolchain.
       gn_args['enable_lto'] = enable_lto

     aot = not runtime_mode in ['debug', 'dynamic_profile', 'dynamic_release']
     if args.target_os == 'android':
         gn_args['target_os'] = 'android'
     elif args.target_os == 'ios':
         gn_args['target_os'] = 'ios'
         gn_args['use_ios_simulator'] = args.simulator
         if not args.simulator:
           aot = True
     else:
       aot = False

     if runtime_mode == 'debug':
         gn_args['dart_runtime_mode'] = 'develop'
     elif runtime_mode == 'dynamic_profile':
         gn_args['dart_runtime_mode'] = 'profile'
     elif runtime_mode == 'dynamic_release':
         gn_args['dart_runtime_mode'] = 'release'
     else:
         gn_args['dart_runtime_mode'] = runtime_mode

     if args.dart_debug:
         gn_args['dart_debug'] = True

     if args.target_os == 'android':
         gn_args['target_cpu'] = args.android_cpu
     elif args.target_os == 'ios':
         if args.simulator:
             gn_args['target_cpu'] = 'x64'
         else:
             gn_args['target_cpu'] = args.ios_cpu
     elif args.target_os == 'linux':
       gn_args['target_cpu'] = args.linux_cpu
     else:
         # Building host artifacts
         gn_args['target_cpu'] = 'x64'

     # On iOS Devices, use the Dart bytecode interpreter so we don't incur
     # snapshotting and linking costs of the precompiler during development.
     # We can still use the JIT on the simulator though.
     can_use_dbc = runtime_mode in ['debug', 'dynamic_profile', 'dynamic_release']
     use_dbc = args.target_os == 'ios' and not args.simulator and can_use_dbc
     # Use dbc if it is requested on the command line and supported by the
     # requested runtime mode.
     if args.interpreter and not can_use_dbc:
       raise Exception('--interpreter not supported with --runtime-mode=' + runtime_mode)
     use_dbc = use_dbc or (args.interpreter and can_use_dbc)
     if use_dbc:
       gn_args['dart_target_arch'] = 'dbc'
     else:
       gn_args['dart_target_arch'] = gn_args['target_cpu']

     # No cross-compilation on Windows (for now).
     if sys.platform.startswith(('cygwin', 'win')):
       if 'target_os' in gn_args:
         gn_args['target_os'] = 'win'
       if 'target_cpu' in gn_args:
         gn_args['target_cpu'] = cpu_for_target_arch(gn_args['target_cpu'])

     if args.target_os is None:
       if sys.platform.startswith(('cygwin', 'win')):
         gn_args['dart_use_fallback_root_certificates'] = True


     gn_args['dart_custom_version_for_pub'] = 'flutter'

     # Make sure host_cpu matches the bit width of target_cpu.
     target_is_32_bit = gn_args['target_cpu'] == 'arm' or gn_args['target_cpu'] == 'x86'
     if target_is_32_bit:
       gn_args["host_cpu"] = "x86"

     gn_args['flutter_runtime_mode'] = runtime_mode
     gn_args['flutter_aot'] = aot

     if args.target_sysroot:
       gn_args['target_sysroot'] = args.target_sysroot

     if args.toolchain_prefix:
       gn_args['toolchain_prefix'] = args.toolchain_prefix

     goma_dir = os.environ.get('GOMA_DIR')
     goma_home_dir = os.path.join(os.getenv('HOME', ''), 'goma')
     if args.goma and goma_dir:
       gn_args['use_goma'] = True
       gn_args['goma_dir'] = goma_dir
     elif args.goma and os.path.exists(goma_home_dir):
       gn_args['use_goma'] = True
       gn_args['goma_dir'] = goma_home_dir
     else:
       gn_args['use_goma'] = False
       gn_args['goma_dir'] = None

     if args.enable_vulkan:
       # Enable vulkan in the Flutter shell.
       gn_args['shell_enable_vulkan'] = True
       # Configure Skia for Vulkan support.
       gn_args['skia_use_vulkan'] = True
       gn_args['skia_vulkan_header'] = "flutter/vulkan/skia_vulkan_header.h"

     # We should not need a special case for x86, but this seems to introduce text relocations
     # even with -fPIC everywhere.
     # gn_args['enable_profiling'] = args.runtime_mode != 'release' and args.android_cpu != 'x86'

     return gn_args

 def parse_args(args):
   args = args[1:]
   parser = argparse.ArgumentParser(description='A script run` gn gen`.')

   parser.add_argument('--unoptimized', default=False, action='store_true')

   parser.add_argument('--runtime-mode', type=str, choices=['debug', 'profile', 'release'], default='debug')
   parser.add_argument('--dynamic', default=False, action='store_true')
   parser.add_argument('--interpreter', default=False, action='store_true')
   parser.add_argument('--dart-debug', default=False, action='store_true')

   parser.add_argument('--target-os', type=str, choices=['android', 'ios', 'linux'])
   parser.add_argument('--android', dest='target_os', action='store_const', const='android')
   parser.add_argument('--android-cpu', type=str, choices=['arm', 'x64', 'x86', 'arm64'], default='arm')
   parser.add_argument('--ios', dest='target_os', action='store_const', const='ios')
   parser.add_argument('--ios-cpu', type=str, choices=['arm', 'arm64'], default='arm64')
   parser.add_argument('--simulator', action='store_true', default=False)
   parser.add_argument('--linux-cpu', type=str, choices=['x64', 'x86', 'arm64'])

   parser.add_argument('--goma', default=True, action='store_true')
   parser.add_argument('--no-goma', dest='goma', action='store_false')

   parser.add_argument('--lto', default=True, action='store_true')
   parser.add_argument('--no-lto', dest='lto', action='store_false')

   parser.add_argument('--clang', default=True, action='store_true')
   parser.add_argument('--no-clang', dest='clang', action='store_false')

   parser.add_argument('--target-sysroot', type=str)
   parser.add_argument('--toolchain-prefix', type=str)

   parser.add_argument('--enable-vulkan', action='store_true', default=False)

   parser.add_argument('--embedder-for-target', dest='embedder_for_target', action='store_true', default=False)

   return parser.parse_args(args)

 def main(argv):
   args = parse_args(argv)

   if sys.platform.startswith(('cygwin', 'win')):
     subdir = 'win'
   elif sys.platform == 'darwin':
     subdir = 'mac'
   elif sys.platform.startswith('linux'):
      subdir = 'linux64'
   else:
     raise Error('Unknown platform: ' + sys.platform)

   command = [
     '%s/buildtools/%s/gn' % (SRC_ROOT, subdir),
     'gen',
     '--check',
   ]

   if sys.platform == 'darwin':
     # On the Mac, also generate Xcode projects for ease of editing.
     command.append('--ide=xcode')

   if sys.platform.startswith('win'):
     # On Windows, also generate Visual Studio project for ease of editing.
     command.append('--ide=vs')

   gn_args = to_command_line(to_gn_args(args))
   out_dir = get_out_dir(args)
   print "gn gen --check in %s" % out_dir
   command.append(out_dir)
   command.append('--args=%s' % ' '.join(gn_args))
   gn_call_result = subprocess.call(command, cwd=SRC_ROOT)

   if gn_call_result == 0:
     # Generate/Replace the compile commands database in out.
     compile_cmd_gen_cmd = [
       'ninja',
       '-C',
       out_dir,
       '-t',
       'compdb',
       'cc',
       'cxx',
       'objc',
       'objcxx',
       'asm',
     ]

     contents = subprocess.check_output(compile_cmd_gen_cmd, cwd=SRC_ROOT)
     compile_commands = open('%s/out/compile_commands.json' % SRC_ROOT, 'w+')
     compile_commands.write(contents)
     compile_commands.close()

   return gn_call_result

 if __name__ == '__main__':
     sys.exit(main(sys.argv))
	#!/usr/bin/env python
	# Copyright 2015 The Chromium Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style license that can be
	# found in the LICENSE file.

	import argparse
	import subprocess
	import sys
	import os

	SRC_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

	def get_out_dir(args):
	if args.target_os is not None:
	target_dir = [args.target_os]
	else:
	target_dir = ['host']

	runtime_mode = args.runtime_mode
	if args.dynamic and runtime_mode in ['profile', 'release']:
	target_dir.append('dynamic')

	target_dir.append(args.runtime_mode)

	if args.simulator:
	target_dir.append('sim')

	if args.unoptimized:
	target_dir.append('unopt')

	if args.target_os != 'ios' and args.interpreter:
	target_dir.append('interpreter')

	if args.android_cpu != 'arm':
	target_dir.append(args.android_cpu)

	if args.ios_cpu != 'arm64':
	target_dir.append(args.ios_cpu)

	if args.linux_cpu is not None:
	target_dir.append(args.linux_cpu)

	if args.enable_vulkan:
	target_dir.append('vulkan')

	return os.path.join('out', '_'.join(target_dir))

	def to_command_line(gn_args):
	def merge(key, value):
	if type(value) is bool:
	return '%s=%s' % (key, 'true' if value else 'false')
	return '%s="%s"' % (key, value)
	return [merge(x, y) for x, y in gn_args.iteritems()]

	def cpu_for_target_arch(arch):
	if arch in ['ia32', 'arm', 'armv6', 'armv5te', 'mips',
	'simarm', 'simarmv6', 'simarmv5te', 'simmips', 'simdbc',
	'armsimdbc']:
	return 'x86'
	if arch in ['x64', 'arm64', 'simarm64', 'simdbc64', 'armsimdbc64']:
	return 'x64'

	def to_gn_args(args):
	if args.simulator:
	if args.target_os == 'android':
	raise Exception('--simulator is not supported on Android')
	elif args.target_os == 'ios':
	if args.runtime_mode != 'debug':
	raise Exception('iOS simulator only supports the debug runtime mode')

	if args.target_os != 'android' and args.enable_vulkan:
	raise Exception('--enable-vulkan is only supported on Android')

	runtime_mode = args.runtime_mode
	if args.dynamic and runtime_mode in ['profile', 'release']:
	runtime_mode = 'dynamic_' + runtime_mode

	gn_args = {}

	# Skia GN args.
	gn_args['skia_enable_flutter_defines'] = True # Enable Flutter API guards in Skia.
	gn_args['skia_use_dng_sdk'] = False # RAW image handling.
	gn_args['skia_use_sfntly'] = False # PDF handling depedency.
	gn_args['skia_enable_pdf'] = False # PDF handling.
	gn_args['skia_use_expat'] = args.target_os == 'android'
	gn_args['skia_use_fontconfig'] = False # Use the custom font manager instead.
	gn_args['is_official_build'] = True # Disable Skia test utilities.

	gn_args['is_debug'] = args.unoptimized
	gn_args['android_full_debug'] = args.target_os == 'android' and args.unoptimized
	gn_args['is_clang'] = not sys.platform.startswith(('cygwin', 'win'))

	gn_args['embedder_for_target'] = args.embedder_for_target

	enable_lto = args.lto
	if args.unoptimized:
	# There is no point in enabling LTO in unoptimized builds.
	enable_lto = False

	if not sys.platform.startswith('win'):
	# The GN arg is not available in the windows toolchain.
	gn_args['enable_lto'] = enable_lto

	aot = not runtime_mode in ['debug', 'dynamic_profile', 'dynamic_release']
	if args.target_os == 'android':
	gn_args['target_os'] = 'android'
	elif args.target_os == 'ios':
	gn_args['target_os'] = 'ios'
	gn_args['use_ios_simulator'] = args.simulator
	if not args.simulator:
	aot = True
	else:
	aot = False

	if runtime_mode == 'debug':
	gn_args['dart_runtime_mode'] = 'develop'
	elif runtime_mode == 'dynamic_profile':
	gn_args['dart_runtime_mode'] = 'profile'
	elif runtime_mode == 'dynamic_release':
	gn_args['dart_runtime_mode'] = 'release'
	else:
	gn_args['dart_runtime_mode'] = runtime_mode

	if args.dart_debug:
	gn_args['dart_debug'] = True

	if args.target_os == 'android':
	gn_args['target_cpu'] = args.android_cpu
	elif args.target_os == 'ios':
	if args.simulator:
	gn_args['target_cpu'] = 'x64'
	else:
	gn_args['target_cpu'] = args.ios_cpu
	elif args.target_os == 'linux':
	gn_args['target_cpu'] = args.linux_cpu
	else:
	# Building host artifacts
	gn_args['target_cpu'] = 'x64'

	# On iOS Devices, use the Dart bytecode interpreter so we don't incur
	# snapshotting and linking costs of the precompiler during development.
	# We can still use the JIT on the simulator though.
	can_use_dbc = runtime_mode in ['debug', 'dynamic_profile', 'dynamic_release']
	use_dbc = args.target_os == 'ios' and not args.simulator and can_use_dbc
	# Use dbc if it is requested on the command line and supported by the
	# requested runtime mode.
	if args.interpreter and not can_use_dbc:
	raise Exception('--interpreter not supported with --runtime-mode=' + runtime_mode)
	use_dbc = use_dbc or (args.interpreter and can_use_dbc)
	if use_dbc:
	gn_args['dart_target_arch'] = 'dbc'
	else:
	gn_args['dart_target_arch'] = gn_args['target_cpu']

	# No cross-compilation on Windows (for now).
	if sys.platform.startswith(('cygwin', 'win')):
	if 'target_os' in gn_args:
	gn_args['target_os'] = 'win'
	if 'target_cpu' in gn_args:
	gn_args['target_cpu'] = cpu_for_target_arch(gn_args['target_cpu'])

	if args.target_os is None:
	if sys.platform.startswith(('cygwin', 'win')):
	gn_args['dart_use_fallback_root_certificates'] = True


	gn_args['dart_custom_version_for_pub'] = 'flutter'

	# Make sure host_cpu matches the bit width of target_cpu.
	target_is_32_bit = gn_args['target_cpu'] == 'arm' or gn_args['target_cpu'] == 'x86'
	if target_is_32_bit:
	gn_args["host_cpu"] = "x86"

	gn_args['flutter_runtime_mode'] = runtime_mode
	gn_args['flutter_aot'] = aot

	if args.target_sysroot:
	gn_args['target_sysroot'] = args.target_sysroot

	if args.toolchain_prefix:
	gn_args['toolchain_prefix'] = args.toolchain_prefix

	goma_dir = os.environ.get('GOMA_DIR')
	goma_home_dir = os.path.join(os.getenv('HOME', ''), 'goma')
	if args.goma and goma_dir:
	gn_args['use_goma'] = True
	gn_args['goma_dir'] = goma_dir
	elif args.goma and os.path.exists(goma_home_dir):
	gn_args['use_goma'] = True
	gn_args['goma_dir'] = goma_home_dir
	else:
	gn_args['use_goma'] = False
	gn_args['goma_dir'] = None

	if args.enable_vulkan:
	# Enable vulkan in the Flutter shell.
	gn_args['shell_enable_vulkan'] = True
	# Configure Skia for Vulkan support.
	gn_args['skia_use_vulkan'] = True
	gn_args['skia_vulkan_header'] = "flutter/vulkan/skia_vulkan_header.h"

	# We should not need a special case for x86, but this seems to introduce text relocations
	# even with -fPIC everywhere.
	# gn_args['enable_profiling'] = args.runtime_mode != 'release' and args.android_cpu != 'x86'

	return gn_args

	def parse_args(args):
	args = args[1:]
	parser = argparse.ArgumentParser(description='A script run` gn gen`.')

	parser.add_argument('--unoptimized', default=False, action='store_true')

	parser.add_argument('--runtime-mode', type=str, choices=['debug', 'profile', 'release'], default='debug')
	parser.add_argument('--dynamic', default=False, action='store_true')
	parser.add_argument('--interpreter', default=False, action='store_true')
	parser.add_argument('--dart-debug', default=False, action='store_true')

	parser.add_argument('--target-os', type=str, choices=['android', 'ios', 'linux'])
	parser.add_argument('--android', dest='target_os', action='store_const', const='android')
	parser.add_argument('--android-cpu', type=str, choices=['arm', 'x64', 'x86', 'arm64'], default='arm')
	parser.add_argument('--ios', dest='target_os', action='store_const', const='ios')
	parser.add_argument('--ios-cpu', type=str, choices=['arm', 'arm64'], default='arm64')
	parser.add_argument('--simulator', action='store_true', default=False)
	parser.add_argument('--linux-cpu', type=str, choices=['x64', 'x86', 'arm64'])

	parser.add_argument('--goma', default=True, action='store_true')
	parser.add_argument('--no-goma', dest='goma', action='store_false')

	parser.add_argument('--lto', default=True, action='store_true')
	parser.add_argument('--no-lto', dest='lto', action='store_false')

	parser.add_argument('--clang', default=True, action='store_true')
	parser.add_argument('--no-clang', dest='clang', action='store_false')

	parser.add_argument('--target-sysroot', type=str)
	parser.add_argument('--toolchain-prefix', type=str)

	parser.add_argument('--enable-vulkan', action='store_true', default=False)

	parser.add_argument('--embedder-for-target', dest='embedder_for_target', action='store_true', default=False)

	return parser.parse_args(args)

	def main(argv):
	args = parse_args(argv)

	if sys.platform.startswith(('cygwin', 'win')):
	subdir = 'win'
	elif sys.platform == 'darwin':
	subdir = 'mac'
	elif sys.platform.startswith('linux'):
	subdir = 'linux64'
	else:
	raise Error('Unknown platform: ' + sys.platform)

	command = [
	'%s/buildtools/%s/gn' % (SRC_ROOT, subdir),
	'gen',
	'--check',
	]

	if sys.platform == 'darwin':
	# On the Mac, also generate Xcode projects for ease of editing.
	command.append('--ide=xcode')

	if sys.platform.startswith('win'):
	# On Windows, also generate Visual Studio project for ease of editing.
	command.append('--ide=vs')

	gn_args = to_command_line(to_gn_args(args))
	out_dir = get_out_dir(args)
	print "gn gen --check in %s" % out_dir
	command.append(out_dir)
	command.append('--args=%s' % ' '.join(gn_args))
	gn_call_result = subprocess.call(command, cwd=SRC_ROOT)

	if gn_call_result == 0:
	# Generate/Replace the compile commands database in out.
	compile_cmd_gen_cmd = [
	'ninja',
	'-C',
	out_dir,
	'-t',
	'compdb',
	'cc',
	'cxx',
	'objc',
	'objcxx',
	'asm',
	]

	contents = subprocess.check_output(compile_cmd_gen_cmd, cwd=SRC_ROOT)
	compile_commands = open('%s/out/compile_commands.json' % SRC_ROOT, 'w+')
	compile_commands.write(contents)
	compile_commands.close()

	return gn_call_result

	if __name__ == '__main__':
	sys.exit(main(sys.argv))