files.new_contents: # Copyright 2012-2016 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import os, re, subprocess, platform
  from . import coredata
  from . import mesonlib
  from . import mlog
  from .compilers import *
  from .mesonlib import EnvironmentException, Popen_safe
  import configparser
  import shlex
  import shutil
  
  build_filename = 'meson.build'
  
  def find_coverage_tools():
      gcovr_exe = 'gcovr'
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      if not mesonlib.exe_exists([gcovr_exe, '--version']):
          gcovr_exe = None
      if not mesonlib.exe_exists([lcov_exe, '--version']):
          lcov_exe = None
      if not mesonlib.exe_exists([genhtml_exe, '--version']):
          genhtml_exe = None
      return gcovr_exe, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5'):
      for n in ['ninja', 'ninja-build']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          # Perhaps we should add a way for the caller to know the failure mode
          # (not found or too old)
          if p.returncode == 0 and mesonlib.version_compare(found, '>=' + version):
              return n
  
  def detect_native_windows_arch():
      """
      The architecture of Windows itself: x86 or amd64
      """
      # These env variables are always available. See:
      # https://msdn.microsoft.com/en-us/library/aa384274(VS.85).aspx
      # https://blogs.msdn.microsoft.com/david.wang/2006/03/27/howto-detect-process-bitness/
      arch = os.environ.get('PROCESSOR_ARCHITEW6432', '').lower()
      if not arch:
          try:
              # If this doesn't exist, something is messing with the environment
              arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
          except KeyError:
              raise EnvironmentException('Unable to detect native OS architecture')
      return arch
  
  def detect_windows_arch(compilers):
      """
      Detecting the 'native' architecture of Windows is not a trivial task. We
      cannot trust that the architecture that Python is built for is the 'native'
      one because you can run 32-bit apps on 64-bit Windows using WOW64 and
      people sometimes install 32-bit Python on 64-bit Windows.
  
      We also can't rely on the architecture of the OS itself, since it's
      perfectly normal to compile and run 32-bit applications on Windows as if
      they were native applications. It's a terrible experience to require the
      user to supply a cross-info file to compile 32-bit applications on 64-bit
      Windows. Thankfully, the only way to compile things with Visual Studio on
      Windows is by entering the 'msvc toolchain' environment, which can be
      easily detected.
  
      In the end, the sanest method is as follows:
      1. Check if we're in an MSVC toolchain environment, and if so, return the
         MSVC toolchain architecture as our 'native' architecture.
      2. If not, check environment variables that are set by Windows and WOW64 to
         find out the architecture that Windows is built for, and use that as our
         'native' architecture.
      """
      os_arch = detect_native_windows_arch()
      if os_arch != 'amd64':
          return os_arch
      # If we're on 64-bit Windows, 32-bit apps can be compiled without
      # cross-compilation. So if we're doing that, just set the native arch as
      # 32-bit and pretend like we're running under WOW64. Else, return the
      # actual Windows architecture that we deduced above.
      for compiler in compilers.values():
          # Check if we're using and inside an MSVC toolchain environment
          if compiler.id == 'msvc' and 'VCINSTALLDIR' in os.environ:
              # 'Platform' is only set when the target arch is not 'x86'.
              # It's 'x64' when targetting x86_64 and 'arm' when targetting ARM.
              platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'gcc' and compiler.has_define('__i386__'):
              return 'x86'
      return os_arch
  
  def detect_cpu_family(compilers):
      """
      Python is inconsistent in its platform module.
      It returns different values for the same cpu.
      For x86 it might return 'x86', 'i686' or somesuch.
      Do some canonicalization.
      """
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial.startswith('i') and trial.endswith('86'):
          return 'x86'
      if trial.startswith('arm'):
          return 'arm'
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # On Linux (and maybe others) there can be any mixture of 32/64 bit
          # code in the kernel, Python, system etc. The only reliable way
          # to know is to check the compiler defines.
          for c in compilers.values():
              try:
                  if c.has_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_cpu(compilers):
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # Same check as above for cpu_family
          for c in compilers.values():
              try:
                  if c.has_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      return platform.system().lower()
  
  
  def for_windows(is_cross, env):
      """
      Host machine is windows?
  
      Note: 'host' is the machine on which compiled binaries will run
      """
      if not is_cross:
          return mesonlib.is_windows()
      elif env.cross_info.has_host():
          return env.cross_info.config['host_machine']['system'] == 'windows'
      return False
  
  def for_darwin(is_cross, env):
      """
      Host machine is Darwin (iOS/OS X)?
  
      Note: 'host' is the machine on which compiled binaries will run
      """
      if not is_cross:
          return mesonlib.is_osx()
      elif env.cross_info.has_host():
          return env.cross_info.config['host_machine']['system'] == 'darwin'
      return False
  
  
  def search_version(text):
      # Usually of the type 4.1.4 but compiler output may contain
      # stuff like this:
      # (Sourcery CodeBench Lite 2014.05-29) 4.8.3 20140320 (prerelease)
      # Limiting major version number to two digits seems to work
      # thus far. When we get to GCC 100, this will break, but
      # if we are still relevant when that happens, it can be
      # considered an achievement in itself.
      #
      # This regex is reaching magic levels. If it ever needs
      # to be updated, do not complexify but convert to something
      # saner instead.
      version_regex = '(?<!(\d|\.))(\d{1,2}(\.\d+)+(-[a-zA-Z0-9]+)?)'
      match
  
  [... the rest is omitted ...]
files.new_path: mesonbuild/environment.py
files.old_contents: # Copyright 2012-2016 The Meson development team
  
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  
  #     http://www.apache.org/licenses/LICENSE-2.0
  
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import os, re, subprocess, platform
  from . import coredata
  from . import mesonlib
  from . import mlog
  from .compilers import *
  from .mesonlib import EnvironmentException, Popen_safe
  import configparser
  import shlex
  import shutil
  
  build_filename = 'meson.build'
  
  def find_coverage_tools():
      gcovr_exe = 'gcovr'
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      if not mesonlib.exe_exists([gcovr_exe, '--version']):
          gcovr_exe = None
      if not mesonlib.exe_exists([lcov_exe, '--version']):
          lcov_exe = None
      if not mesonlib.exe_exists([genhtml_exe, '--version']):
          genhtml_exe = None
      return gcovr_exe, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5'):
      for n in ['ninja', 'ninja-build']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          # Perhaps we should add a way for the caller to know the failure mode
          # (not found or too old)
          if p.returncode == 0 and mesonlib.version_compare(found, '>=' + version):
              return n
  
  def detect_native_windows_arch():
      """
      The architecture of Windows itself: x86 or amd64
      """
      # These env variables are always available. See:
      # https://msdn.microsoft.com/en-us/library/aa384274(VS.85).aspx
      # https://blogs.msdn.microsoft.com/david.wang/2006/03/27/howto-detect-process-bitness/
      arch = os.environ.get('PROCESSOR_ARCHITEW6432', '').lower()
      if not arch:
          try:
              # If this doesn't exist, something is messing with the environment
              arch = os.environ['PROCESSOR_ARCHITECTURE'].lower()
          except KeyError:
              raise EnvironmentException('Unable to detect native OS architecture')
      return arch
  
  def detect_windows_arch(compilers):
      """
      Detecting the 'native' architecture of Windows is not a trivial task. We
      cannot trust that the architecture that Python is built for is the 'native'
      one because you can run 32-bit apps on 64-bit Windows using WOW64 and
      people sometimes install 32-bit Python on 64-bit Windows.
  
      We also can't rely on the architecture of the OS itself, since it's
      perfectly normal to compile and run 32-bit applications on Windows as if
      they were native applications. It's a terrible experience to require the
      user to supply a cross-info file to compile 32-bit applications on 64-bit
      Windows. Thankfully, the only way to compile things with Visual Studio on
      Windows is by entering the 'msvc toolchain' environment, which can be
      easily detected.
  
      In the end, the sanest method is as follows:
      1. Check if we're in an MSVC toolchain environment, and if so, return the
         MSVC toolchain architecture as our 'native' architecture.
      2. If not, check environment variables that are set by Windows and WOW64 to
         find out the architecture that Windows is built for, and use that as our
         'native' architecture.
      """
      os_arch = detect_native_windows_arch()
      if os_arch != 'amd64':
          return os_arch
      # If we're on 64-bit Windows, 32-bit apps can be compiled without
      # cross-compilation. So if we're doing that, just set the native arch as
      # 32-bit and pretend like we're running under WOW64. Else, return the
      # actual Windows architecture that we deduced above.
      for compiler in compilers.values():
          # Check if we're using and inside an MSVC toolchain environment
          if compiler.id == 'msvc' and 'VCINSTALLDIR' in os.environ:
              # 'Platform' is only set when the target arch is not 'x86'.
              # It's 'x64' when targetting x86_64 and 'arm' when targetting ARM.
              platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'gcc' and compiler.has_define('__i386__'):
              return 'x86'
      return os_arch
  
  def detect_cpu_family(compilers):
      """
      Python is inconsistent in its platform module.
      It returns different values for the same cpu.
      For x86 it might return 'x86', 'i686' or somesuch.
      Do some canonicalization.
      """
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial.startswith('i') and trial.endswith('86'):
          return 'x86'
      if trial.startswith('arm'):
          return 'arm'
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # On Linux (and maybe others) there can be any mixture of 32/64 bit
          # code in the kernel, Python, system etc. The only reliable way
          # to know is to check the compiler defines.
          for c in compilers.values():
              try:
                  if c.has_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_cpu(compilers):
      if mesonlib.is_windows():
          trial = detect_windows_arch(compilers)
      else:
          trial = platform.machine().lower()
      if trial in ('amd64', 'x64'):
          trial = 'x86_64'
      if trial == 'x86_64':
          # Same check as above for cpu_family
          for c in compilers.values():
              try:
                  if c.has_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      return platform.system().lower()
  
  
  def for_windows(is_cross, env):
      """
      Host machine is windows?
  
      Note: 'host' is the machine on which compiled binaries will run
      """
      if not is_cross:
          return mesonlib.is_windows()
      elif env.cross_info.has_host():
          return env.cross_info.config['host_machine']['system'] == 'windows'
      return False
  
  def for_darwin(is_cross, env):
      """
      Host machine is Darwin (iOS/OS X)?
  
      Note: 'host' is the machine on which compiled binaries will run
      """
      if not is_cross:
          return mesonlib.is_osx()
      elif env.cross_info.has_host():
          return env.cross_info.config['host_machine']['system'] == 'darwin'
      return False
  
  
  def search_version(text):
      # Usually of the type 4.1.4 but compiler output may contain
      # stuff like this:
      # (Sourcery CodeBench Lite 2014.05-29) 4.8.3 20140320 (prerelease)
      # Limiting major version number to two digits seems to work
      # thus far. When we get to GCC 100, this will break, but
      # if we are still relevant when that happens, it can be
      # considered an achievement in itself.
      #
      # This regex is reaching magic levels. If it ever needs
      # to be updated, do not complexify but convert to something
      # saner instead.
      version_regex = '(?<!(\d|\.))(\d{1,2}(\.\d+)+(-[a-zA-Z0-9]+)?)'
      match
  
  [... the rest is omitted ...]
files.old_path: mesonbuild/environment.py