files: # Copyright 2014-2016 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
  import pickle
  import xml.dom.minidom
  import xml.etree.ElementTree as ET
  import uuid
  from pathlib import Path, PurePath
  
  from . import backends
  from .. import build
  from .. import dependencies
  from .. import mlog
  from .. import compilers
  from ..compilers import CompilerArgs
  from ..mesonlib import MesonException, File, python_command
  from ..environment import Environment, build_filename
  
  def autodetect_vs_version(build):
      vs_version = os.getenv('VisualStudioVersion', None)
      vs_install_dir = os.getenv('VSINSTALLDIR', None)
      if not vs_install_dir:
          raise MesonException('Could not detect Visual Studio: Environment variable VSINSTALLDIR is not set!\n'
                               'Are you running meson from the Visual Studio Developer Command Prompt?')
      # VisualStudioVersion is set since Visual Studio 12.0, but sometimes
      # vcvarsall.bat doesn't set it, so also use VSINSTALLDIR
      if vs_version == '14.0' or 'Visual Studio 14' in vs_install_dir:
          from mesonbuild.backend.vs2015backend import Vs2015Backend
          return Vs2015Backend(build)
      if vs_version == '15.0' or 'Visual Studio 17' in vs_install_dir or \
         'Visual Studio\\2017' in vs_install_dir:
          from mesonbuild.backend.vs2017backend import Vs2017Backend
          return Vs2017Backend(build)
      if 'Visual Studio 10.0' in vs_install_dir:
          return Vs2010Backend(build)
      raise MesonException('Could not detect Visual Studio using VisualStudioVersion: {!r} or VSINSTALLDIR: {!r}!\n'
                           'Please specify the exact backend to use.'.format(vs_version, vs_install_dir))
  
  def split_o_flags_args(args):
      """
      Splits any /O args and returns them. Does not take care of flags overriding
      previous ones. Skips non-O flag arguments.
  
      ['/Ox', '/Ob1'] returns ['/Ox', '/Ob1']
      ['/Oxj', '/MP'] returns ['/Ox', '/Oj']
      """
      o_flags = []
      for arg in args:
          if not arg.startswith('/O'):
              continue
          flags = list(arg[2:])
          # Assume that this one can't be clumped with the others since it takes
          # an argument itself
          if 'b' in flags:
              o_flags.append(arg)
          else:
              o_flags += ['/O' + f for f in flags]
      return o_flags
  
  class RegenInfo:
      def __init__(self, source_dir, build_dir, depfiles):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.depfiles = depfiles
  
  class Vs2010Backend(backends.Backend):
      def __init__(self, build):
          super().__init__(build)
          self.name = 'vs2010'
          self.project_file_version = '10.0.30319.1'
          self.platform_toolset = None
          self.vs_version = '2010'
          self.windows_target_platform_version = None
          self.subdirs = {}
  
      def generate_custom_generator_commands(self, target, parent_node):
          generator_output_files = []
          custom_target_include_dirs = []
          custom_target_output_files = []
          target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
          down = self.target_to_build_root(target)
          for genlist in target.get_generated_sources():
              if isinstance(genlist, (build.CustomTarget, build.CustomTargetIndex)):
                  for i in genlist.get_outputs():
                      # Path to the generated source from the current vcxproj dir via the build root
                      ipath = os.path.join(down, self.get_target_dir(genlist), i)
                      custom_target_output_files.append(ipath)
                  idir = self.relpath(self.get_target_dir(genlist), self.get_target_dir(target))
                  if idir not in custom_target_include_dirs:
                      custom_target_include_dirs.append(idir)
              else:
                  generator = genlist.get_generator()
                  exe = generator.get_exe()
                  infilelist = genlist.get_inputs()
                  outfilelist = genlist.get_outputs()
                  source_dir = os.path.join(down, self.build_to_src, genlist.subdir)
                  exe_arr = self.exe_object_to_cmd_array(exe)
                  idgroup = ET.SubElement(parent_node, 'ItemGroup')
                  for i in range(len(infilelist)):
                      if len(infilelist) == len(outfilelist):
                          sole_output = os.path.join(target_private_dir, outfilelist[i])
                      else:
                          sole_output = ''
                      curfile = infilelist[i]
                      infilename = os.path.join(down, curfile.rel_to_builddir(self.build_to_src))
                      base_args = generator.get_arglist(infilename)
                      outfiles_rel = genlist.get_outputs_for(curfile)
                      outfiles = [os.path.join(target_private_dir, of) for of in outfiles_rel]
                      generator_output_files += outfiles
                      args = [x.replace("@INPUT@", infilename).replace('@OUTPUT@', sole_output)
                              for x in base_args]
                      args = self.replace_outputs(args, target_private_dir, outfiles_rel)
                      args = [x.replace("@SOURCE_DIR@", self.environment.get_source_dir())
                               .replace("@BUILD_DIR@", target_private_dir)
                              for x in args]
                      args = [x.replace("@CURRENT_SOURCE_DIR@", source_dir) for x in args]
                      args = [x.replace("@SOURCE_ROOT@", self.environment.get_source_dir())
                               .replace("@BUILD_ROOT@", self.environment.get_build_dir())
                              for x in args]
                      args = [x.replace('\\', '/') for x in args]
                      cmd = exe_arr + self.replace_extra_args(args, genlist)
                      if generator.capture:
                          exe_data = self.serialize_executable(
                              'generator ' + cmd[0],
                              cmd[0],
                              cmd[1:],
                              self.environment.get_build_dir(),
                              capture=outfiles[0]
                          )
                          cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
                          abs_pdir = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
                          os.makedirs(abs_pdir, exist_ok=True)
                      cbs = ET.SubElement(idgroup, 'CustomBuild', Include=infilename)
                      ET.SubElement(cbs, 'Command').text = ' '.join(self.quote_arguments(cmd))
                      ET.SubElement(cbs, 'Outputs').text = ';'.join(outfiles)
          return generator_output_files, custom_target_output_files, custom_target_include_dirs
  
      def generate(self, interp):
          self.interpreter = interp
          target_machine = self.interpreter.builtin['target_machine'].cpu_family_method(None, None)
          if target_machine.endswith('64'):
              # amd64 or x86_64
              self.platform = 'x64'
          elif target_machine == 'x86':
              # x86
              self.platform = 'Win32'
          elif 'arm' in target_machine.lower():
              self.platform = 'ARM'
          else:
              raise MesonException('Unsupported Visual Studio platform: ' + target_machine)
          self.buildtype = self.environment.coredata.get_builtin_option('buildtype')
          sln_filename = os.path.join(self.environment.get_build_dir(), self.build.project_name + '.sln')
          projlist = self.generate_projects()
          self.gen_testproj('RUN_TESTS', os.path.join(self.environment.get_build_dir(), 'RUN_TESTS.vcxproj'))
          self.gen_installproj('RUN_INSTALL', os.path.join(self.environment.get_build_dir(), 'RUN_INSTALL.vcxproj'))
          self.gen_regenproj('REGEN', os.path.join(self.environment.get_build_dir(), 'REGEN.vcxproj'))
          self.generate_solution(sln_filename, projlist)
          self.generate_regen_info()
          Vs2010Backend.touch_regen_timestamp(self.environment.get_build_dir())
  
      @staticmethod
      def get_regen_stampfile(build_dir):
          return os.path.join(os.path.join(build_dir, Environment.private_dir), 'regen.stamp')
  
      @staticmethod
      def touch_regen_timestamp(build_dir):
          with open(Vs2010Backend.get_regen_stampfile(build_dir), 'w'):
              pass
  
      def generate_regen_info(self):
          deps = self.get_regen_filelist()
          regeninfo = RegenInfo(self.environment.get_source_dir(),
                                self.environment.get_build_dir(),
                                deps)
          filename = os.path.join(self.environment.get_scratch_dir(),
                                  'regeninfo.dump')
          with open(filename, 'wb') as f:
              pickle.dump(regeninfo, f)
  
      def get_vcvars_command(self):
          has_arch_values = 'VSCMD_ARG_TGT_ARCH' in os.environ and 'VSCMD_ARG_HOST_ARCH' in os.environ
  
          # Use vcvarsall.bat if we found it.
          if 'VCINSTALLDIR' in os.environ:
              vs_version = os.environ['VisualStudioVersion'] \
                  if 'VisualStudioVersion' in os.environ else None
              relative_path = 'Auxiliary\\Build\\' if vs_version == '15.0' else ''
              script_path = os.environ['VCINSTALLDIR'] + relative_path + 'vcvarsall.bat'
              if os.path.exists(script_path):
                  if has_arch_values:
                      target_arch = os.environ['VSCMD_ARG_TGT_ARCH']
                      host_arch = os.environ['VSCMD_ARG_HOST_ARCH']
                  else:
                      target_arch = os.environ.get('Platform', 'x86')
                      host_arch = target_arch
                  arch = host_arch + '_' + target_arch if host_arch != target_arch else target_arch
                  return '"%s" %s' % (script_path, arch)
  
          # Otherwise try the VS2017 Developer Command Prompt.
          if 'VS150COMNTOOLS' in os.environ and has_arch_values:
              script_path = os.environ['VS150COMNTOOLS'] + 'VsDevCmd.bat'
              if os.path.exists(script_path):
                  return '"%s" -arch=%s -host_arch=%s' % \
                      (script_path, os.environ['VSCMD_ARG_TGT_ARCH'], os.environ['VSCMD_ARG_HOST_ARCH'])
          return ''
  
      def get_obj_target_deps(self, obj_list):
          result = {}
          for o in obj_list:
              if isinstance(o, build.ExtractedObjects):
                  result[o.target.get_id()] = o.target
          return result.items()
  
      def get_target_deps(self, t, recursive=False):
          all_deps = {}
          for target in t.values():
              if isinstance(target, build.CustomTarget):
                  for d in target.get_target_dependencies():
                      all_deps[d.get_id()] = d
              elif isinstance(target, build.RunTarget):
                  for d in [target.command] + target.args:
                      if isinstance(d, (build.BuildTarget, build.CustomTarget)):
                          all_deps[d.get_id()] = d
              elif isinstance(target, build.BuildTarget):
                  for ldep in target.link_targets:
                      all_deps[ldep.get_id()] = ldep
                  for ldep in target.link_whole_targets:
                      all_deps[ldep.get_id()] = ldep
                  for obj_id, objdep in self.get_obj_target_deps(target.objects):
                      all_deps[obj_id] = objdep
                  for gendep in target.get_generated_sources():
                      if isinstance(gendep, build.CustomTarget):
                          all_deps[gendep.get_id()] = gendep
                      elif isinstance(gendep, build.CustomTargetIndex):
                          all_deps[gendep.target.get_id()] = gendep.target
                      else:
                          gen_exe = gendep.generator.get_exe()
                          if isinstance(gen_exe, build.Executable):
                              all_deps[gen_exe.get_id()] = gen_exe
              else:
                  raise MesonException('Unknown target type for target %s' % target)
          if not t or not recursive:
              return all_deps
          ret = self.get_target_deps(all_deps, recursive)
          ret.update(all_deps)
          return ret
  
      def generate_solution_dirs(self, ofile, parents):
          prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
          iterpaths = reversed(parents)
          # Skip first path
          next(iterpaths)
          for path in iterpaths:
              if path not in self.subdirs:
                  basename = path.name
                  identifier = str(uuid.uuid4()).upper()
                  # top-level directories have None as their parent_dir
                  parent_dir = path.parent
                  parent_identifier = self.subdirs[parent_dir][0] \
                      if parent_dir != PurePath('.') else None
                  self.subdirs[path] = (identifier, parent_identifier)
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids['directory'],
                      basename, basename, self.subdirs[path][0])
                  ofile.write(prj_line)
                  ofile.write('EndProject\n')
  
      def generate_solution(self, sln_filename, projlist):
          default_projlist = self.get_build_by_default_targets()
          with open(sln_filename, 'w', encoding='utf-8') as ofile:
              ofile.write('Microsoft Visual Studio Solution File, Format '
                          'Version 11.00\n')
              ofile.write('# Visual Studio ' + self.vs_version + '\n')
              prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
              for prj in projlist:
                  coredata = self.environment.coredata
                  if coredata.get_builtin_option('layout') == 'mirror':
                      self.generate_solution_dirs(ofile, prj[1].parents)
                  target = self.build.targets[prj[0]]
                  lang = 'default'
                  if hasattr(target, 'compilers') and target.compilers:
                      for (lang_out, _) in target.compilers.items():
                          lang = lang_out
                          break
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids[lang],
                      prj[0], prj[1], prj[2])
                  ofile.write(prj_line)
                  target_dict = {target.get_id(): target}
                  # Get direct deps
                  all_deps = self.get_target_deps(target_dict)
                  # Get recursive deps
                  recursive_deps = self.get_target_deps(
                      target_dict, recursive=True)
                  ofile.write('\tProjectSection(ProjectDependencies) = '
                              'postProject\n')
                  regen_guid = self.environment.coredata.regen_guid
                  ofile.write('\t\t{%s} = {%s}\n' % (regen_guid, regen_guid))
                  for dep in all_deps.keys():
                      guid = self.environment.coredata.target_guids[dep]
                      ofile.write('\t\t{%s} = {%s}\n' % (guid, guid))
                  ofile.write('\tEndProjectSection\n')
                  ofile.write('EndProject\n')
                  for dep, target in recursive_deps.items():
                      if prj[0] in default_projlist:
                          default_projlist[dep] = target
  
              test_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                       'RUN_TESTS', 'RUN_TESTS.vcxproj',
                                       self.environment.coredata.test_guid)
              ofile.write(test_line)
              ofile.write('EndProject\n')
              regen_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                        'REGEN', 'REGEN.vcxproj',
                                        self.environment.coredata.regen_guid)
              ofile.write(regen_line)
              ofile.write('EndProject\n')
              install_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                          'RUN_INSTALL', 'RUN_INSTALL.vcxproj',
                                          self.environment.coredata.install_guid)
              ofile.write(install_line)
              ofile.write('EndProject\n')
              ofile.write('Global\n')
              ofile.write('\tGlobalSection(SolutionConfigurationPlatforms) = '
                          'preSolution\n')
              ofile.write('\t\t%s|%s = %s|%s\n' %
                          (self.buildtype, self.platform, self.buildtype,
                           self.platform))
              ofile.write('\tEndGlobalSection\n')
              of
  
  [... the rest is omitted ...]
files: mesonbuild/backend/vs2010backend.py
files: # Copyright 2014-2016 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
  import pickle
  import xml.dom.minidom
  import xml.etree.ElementTree as ET
  import uuid
  from pathlib import Path, PurePath
  
  from . import backends
  from .. import build
  from .. import dependencies
  from .. import mlog
  from .. import compilers
  from ..compilers import CompilerArgs
  from ..mesonlib import MesonException, File, python_command
  from ..environment import Environment, build_filename
  
  def autodetect_vs_version(build):
      vs_version = os.getenv('VisualStudioVersion', None)
      vs_install_dir = os.getenv('VSINSTALLDIR', None)
      if not vs_install_dir:
          raise MesonException('Could not detect Visual Studio: Environment variable VSINSTALLDIR is not set!\n'
                               'Are you running meson from the Visual Studio Developer Command Prompt?')
      # VisualStudioVersion is set since Visual Studio 12.0, but sometimes
      # vcvarsall.bat doesn't set it, so also use VSINSTALLDIR
      if vs_version == '14.0' or 'Visual Studio 14' in vs_install_dir:
          from mesonbuild.backend.vs2015backend import Vs2015Backend
          return Vs2015Backend(build)
      if vs_version == '15.0' or 'Visual Studio 17' in vs_install_dir or \
         'Visual Studio\\2017' in vs_install_dir:
          from mesonbuild.backend.vs2017backend import Vs2017Backend
          return Vs2017Backend(build)
      if 'Visual Studio 10.0' in vs_install_dir:
          return Vs2010Backend(build)
      raise MesonException('Could not detect Visual Studio using VisualStudioVersion: {!r} or VSINSTALLDIR: {!r}!\n'
                           'Please specify the exact backend to use.'.format(vs_version, vs_install_dir))
  
  def split_o_flags_args(args):
      """
      Splits any /O args and returns them. Does not take care of flags overriding
      previous ones. Skips non-O flag arguments.
  
      ['/Ox', '/Ob1'] returns ['/Ox', '/Ob1']
      ['/Oxj', '/MP'] returns ['/Ox', '/Oj']
      """
      o_flags = []
      for arg in args:
          if not arg.startswith('/O'):
              continue
          flags = list(arg[2:])
          # Assume that this one can't be clumped with the others since it takes
          # an argument itself
          if 'b' in flags:
              o_flags.append(arg)
          else:
              o_flags += ['/O' + f for f in flags]
      return o_flags
  
  class RegenInfo:
      def __init__(self, source_dir, build_dir, depfiles):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.depfiles = depfiles
  
  class Vs2010Backend(backends.Backend):
      def __init__(self, build):
          super().__init__(build)
          self.name = 'vs2010'
          self.project_file_version = '10.0.30319.1'
          self.platform_toolset = None
          self.vs_version = '2010'
          self.windows_target_platform_version = None
          self.subdirs = {}
  
      def generate_custom_generator_commands(self, target, parent_node):
          generator_output_files = []
          custom_target_include_dirs = []
          custom_target_output_files = []
          target_private_dir = self.relpath(self.get_target_private_dir(target), self.get_target_dir(target))
          down = self.target_to_build_root(target)
          for genlist in target.get_generated_sources():
              if isinstance(genlist, (build.CustomTarget, build.CustomTargetIndex)):
                  for i in genlist.get_outputs():
                      # Path to the generated source from the current vcxproj dir via the build root
                      ipath = os.path.join(down, self.get_target_dir(genlist), i)
                      custom_target_output_files.append(ipath)
                  idir = self.relpath(self.get_target_dir(genlist), self.get_target_dir(target))
                  if idir not in custom_target_include_dirs:
                      custom_target_include_dirs.append(idir)
              else:
                  generator = genlist.get_generator()
                  exe = generator.get_exe()
                  infilelist = genlist.get_inputs()
                  outfilelist = genlist.get_outputs()
                  source_dir = os.path.join(down, self.build_to_src, genlist.subdir)
                  exe_arr = self.exe_object_to_cmd_array(exe)
                  idgroup = ET.SubElement(parent_node, 'ItemGroup')
                  for i in range(len(infilelist)):
                      if len(infilelist) == len(outfilelist):
                          sole_output = os.path.join(target_private_dir, outfilelist[i])
                      else:
                          sole_output = ''
                      curfile = infilelist[i]
                      infilename = os.path.join(down, curfile.rel_to_builddir(self.build_to_src))
                      base_args = generator.get_arglist(infilename)
                      outfiles_rel = genlist.get_outputs_for(curfile)
                      outfiles = [os.path.join(target_private_dir, of) for of in outfiles_rel]
                      generator_output_files += outfiles
                      args = [x.replace("@INPUT@", infilename).replace('@OUTPUT@', sole_output)
                              for x in base_args]
                      args = self.replace_outputs(args, target_private_dir, outfiles_rel)
                      args = [x.replace("@SOURCE_DIR@", self.environment.get_source_dir())
                               .replace("@BUILD_DIR@", target_private_dir)
                              for x in args]
                      args = [x.replace("@CURRENT_SOURCE_DIR@", source_dir) for x in args]
                      args = [x.replace("@SOURCE_ROOT@", self.environment.get_source_dir())
                               .replace("@BUILD_ROOT@", self.environment.get_build_dir())
                              for x in args]
                      args = [x.replace('\\', '/') for x in args]
                      cmd = exe_arr + self.replace_extra_args(args, genlist)
                      if generator.capture:
                          exe_data = self.serialize_executable(
                              'generator ' + cmd[0],
                              cmd[0],
                              cmd[1:],
                              self.environment.get_build_dir(),
                              capture=outfiles[0]
                          )
                          cmd = self.environment.get_build_command() + ['--internal', 'exe', exe_data]
                          abs_pdir = os.path.join(self.environment.get_build_dir(), self.get_target_dir(target))
                          os.makedirs(abs_pdir, exist_ok=True)
                      cbs = ET.SubElement(idgroup, 'CustomBuild', Include=infilename)
                      ET.SubElement(cbs, 'Command').text = ' '.join(self.quote_arguments(cmd))
                      ET.SubElement(cbs, 'Outputs').text = ';'.join(outfiles)
          return generator_output_files, custom_target_output_files, custom_target_include_dirs
  
      def generate(self, interp):
          self.interpreter = interp
          target_machine = self.interpreter.builtin['target_machine'].cpu_family_method(None, None)
          if target_machine.endswith('64'):
              # amd64 or x86_64
              self.platform = 'x64'
          elif target_machine == 'x86':
              # x86
              self.platform = 'Win32'
          elif 'arm' in target_machine.lower():
              self.platform = 'ARM'
          else:
              raise MesonException('Unsupported Visual Studio platform: ' + target_machine)
          self.buildtype = self.environment.coredata.get_builtin_option('buildtype')
          sln_filename = os.path.join(self.environment.get_build_dir(), self.build.project_name + '.sln')
          projlist = self.generate_projects()
          self.gen_testproj('RUN_TESTS', os.path.join(self.environment.get_build_dir(), 'RUN_TESTS.vcxproj'))
          self.gen_installproj('RUN_INSTALL', os.path.join(self.environment.get_build_dir(), 'RUN_INSTALL.vcxproj'))
          self.gen_regenproj('REGEN', os.path.join(self.environment.get_build_dir(), 'REGEN.vcxproj'))
          self.generate_solution(sln_filename, projlist)
          self.generate_regen_info()
          Vs2010Backend.touch_regen_timestamp(self.environment.get_build_dir())
  
      @staticmethod
      def get_regen_stampfile(build_dir):
          return os.path.join(os.path.join(build_dir, Environment.private_dir), 'regen.stamp')
  
      @staticmethod
      def touch_regen_timestamp(build_dir):
          with open(Vs2010Backend.get_regen_stampfile(build_dir), 'w'):
              pass
  
      def generate_regen_info(self):
          deps = self.get_regen_filelist()
          regeninfo = RegenInfo(self.environment.get_source_dir(),
                                self.environment.get_build_dir(),
                                deps)
          filename = os.path.join(self.environment.get_scratch_dir(),
                                  'regeninfo.dump')
          with open(filename, 'wb') as f:
              pickle.dump(regeninfo, f)
  
      def get_obj_target_deps(self, obj_list):
          result = {}
          for o in obj_list:
              if isinstance(o, build.ExtractedObjects):
                  result[o.target.get_id()] = o.target
          return result.items()
  
      def get_target_deps(self, t, recursive=False):
          all_deps = {}
          for target in t.values():
              if isinstance(target, build.CustomTarget):
                  for d in target.get_target_dependencies():
                      all_deps[d.get_id()] = d
              elif isinstance(target, build.RunTarget):
                  for d in [target.command] + target.args:
                      if isinstance(d, (build.BuildTarget, build.CustomTarget)):
                          all_deps[d.get_id()] = d
              elif isinstance(target, build.BuildTarget):
                  for ldep in target.link_targets:
                      all_deps[ldep.get_id()] = ldep
                  for ldep in target.link_whole_targets:
                      all_deps[ldep.get_id()] = ldep
                  for obj_id, objdep in self.get_obj_target_deps(target.objects):
                      all_deps[obj_id] = objdep
                  for gendep in target.get_generated_sources():
                      if isinstance(gendep, build.CustomTarget):
                          all_deps[gendep.get_id()] = gendep
                      elif isinstance(gendep, build.CustomTargetIndex):
                          all_deps[gendep.target.get_id()] = gendep.target
                      else:
                          gen_exe = gendep.generator.get_exe()
                          if isinstance(gen_exe, build.Executable):
                              all_deps[gen_exe.get_id()] = gen_exe
              else:
                  raise MesonException('Unknown target type for target %s' % target)
          if not t or not recursive:
              return all_deps
          ret = self.get_target_deps(all_deps, recursive)
          ret.update(all_deps)
          return ret
  
      def generate_solution_dirs(self, ofile, parents):
          prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
          iterpaths = reversed(parents)
          # Skip first path
          next(iterpaths)
          for path in iterpaths:
              if path not in self.subdirs:
                  basename = path.name
                  identifier = str(uuid.uuid4()).upper()
                  # top-level directories have None as their parent_dir
                  parent_dir = path.parent
                  parent_identifier = self.subdirs[parent_dir][0] \
                      if parent_dir != PurePath('.') else None
                  self.subdirs[path] = (identifier, parent_identifier)
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids['directory'],
                      basename, basename, self.subdirs[path][0])
                  ofile.write(prj_line)
                  ofile.write('EndProject\n')
  
      def generate_solution(self, sln_filename, projlist):
          default_projlist = self.get_build_by_default_targets()
          with open(sln_filename, 'w', encoding='utf-8') as ofile:
              ofile.write('Microsoft Visual Studio Solution File, Format '
                          'Version 11.00\n')
              ofile.write('# Visual Studio ' + self.vs_version + '\n')
              prj_templ = 'Project("{%s}") = "%s", "%s", "{%s}"\n'
              for prj in projlist:
                  coredata = self.environment.coredata
                  if coredata.get_builtin_option('layout') == 'mirror':
                      self.generate_solution_dirs(ofile, prj[1].parents)
                  target = self.build.targets[prj[0]]
                  lang = 'default'
                  if hasattr(target, 'compilers') and target.compilers:
                      for (lang_out, _) in target.compilers.items():
                          lang = lang_out
                          break
                  prj_line = prj_templ % (
                      self.environment.coredata.lang_guids[lang],
                      prj[0], prj[1], prj[2])
                  ofile.write(prj_line)
                  target_dict = {target.get_id(): target}
                  # Get direct deps
                  all_deps = self.get_target_deps(target_dict)
                  # Get recursive deps
                  recursive_deps = self.get_target_deps(
                      target_dict, recursive=True)
                  ofile.write('\tProjectSection(ProjectDependencies) = '
                              'postProject\n')
                  regen_guid = self.environment.coredata.regen_guid
                  ofile.write('\t\t{%s} = {%s}\n' % (regen_guid, regen_guid))
                  for dep in all_deps.keys():
                      guid = self.environment.coredata.target_guids[dep]
                      ofile.write('\t\t{%s} = {%s}\n' % (guid, guid))
                  ofile.write('\tEndProjectSection\n')
                  ofile.write('EndProject\n')
                  for dep, target in recursive_deps.items():
                      if prj[0] in default_projlist:
                          default_projlist[dep] = target
  
              test_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                       'RUN_TESTS', 'RUN_TESTS.vcxproj',
                                       self.environment.coredata.test_guid)
              ofile.write(test_line)
              ofile.write('EndProject\n')
              regen_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                        'REGEN', 'REGEN.vcxproj',
                                        self.environment.coredata.regen_guid)
              ofile.write(regen_line)
              ofile.write('EndProject\n')
              install_line = prj_templ % (self.environment.coredata.lang_guids['default'],
                                          'RUN_INSTALL', 'RUN_INSTALL.vcxproj',
                                          self.environment.coredata.install_guid)
              ofile.write(install_line)
              ofile.write('EndProject\n')
              ofile.write('Global\n')
              ofile.write('\tGlobalSection(SolutionConfigurationPlatforms) = '
                          'preSolution\n')
              ofile.write('\t\t%s|%s = %s|%s\n' %
                          (self.buildtype, self.platform, self.buildtype,
                           self.platform))
              ofile.write('\tEndGlobalSection\n')
              ofile.write('\tGlobalSection(ProjectConfigurationPlatforms) = '
                          'postSolution\n')
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                          (self.environment.coredata.regen_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              # Create the solution configuration
              for p in projlist:
                  # Add to the list of projects in this solution
                  ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                              (p[2], self.buildtype, self.platform,
                               self.buildtype, self.platform))
                  if p[0] in default_projlist and \
                     not isinstance(self.build.targets[p[0]], build.RunTarget):
                      # Add to the list of projects to be built
                      ofile.write('\t\t{%s}.%s|%s.Build.0 = %s|%s\n' %
                                  (p[2], self.buildtype, self.platform,
                                   self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %s|%s\n' %
                          (self.environment.coredata.test_guid, self.buildtype,
                           self.platform, self.buildtype, self.platform))
              ofile.write('\t\t{%s}.%s|%s.ActiveCfg = %
  
  [... the rest is omitted ...]
files: mesonbuild/backend/vs2010backend.py
files: # 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 configparser, os, platform, re, sys, shlex, shutil, subprocess
  
  from . import coredata
  from .linkers import ArLinker, ArmarLinker, VisualStudioLinker, DLinker, CcrxLinker
  from . import mesonlib
  from .mesonlib import MesonException, EnvironmentException, PerMachine, Popen_safe
  from . import mlog
  
  from . import compilers
  from .compilers import (
      CompilerType,
      is_assembly,
      is_header,
      is_library,
      is_llvm_ir,
      is_object,
      is_source,
  )
  from .compilers import (
      ArmCCompiler,
      ArmCPPCompiler,
      ArmclangCCompiler,
      ArmclangCPPCompiler,
      ClangCCompiler,
      ClangCPPCompiler,
      ClangObjCCompiler,
      ClangObjCPPCompiler,
      ClangClCCompiler,
      ClangClCPPCompiler,
      G95FortranCompiler,
      GnuCCompiler,
      GnuCPPCompiler,
      GnuFortranCompiler,
      GnuObjCCompiler,
      GnuObjCPPCompiler,
      ElbrusCCompiler,
      ElbrusCPPCompiler,
      ElbrusFortranCompiler,
      IntelCCompiler,
      IntelCPPCompiler,
      IntelFortranCompiler,
      JavaCompiler,
      MonoCompiler,
      VisualStudioCsCompiler,
      NAGFortranCompiler,
      Open64FortranCompiler,
      PathScaleFortranCompiler,
      PGIFortranCompiler,
      RustCompiler,
      CcrxCCompiler,
      CcrxCPPCompiler,
      SunFortranCompiler,
      ValaCompiler,
      VisualStudioCCompiler,
      VisualStudioCPPCompiler,
  )
  
  build_filename = 'meson.build'
  
  known_cpu_families = (
      'aarch64',
      'arc',
      'arm',
      'e2k',
      'ia64',
      'mips',
      'mips64',
      'parisc',
      'ppc',
      'ppc64',
      'riscv32',
      'riscv64',
      'rx',
      's390x',
      'sparc',
      'sparc64',
      'x86',
      'x86_64'
  )
  
  def detect_gcovr(version='3.1', log=False):
      gcovr_exe = 'gcovr'
      try:
          p, found = Popen_safe([gcovr_exe, '--version'])[0:2]
      except (FileNotFoundError, PermissionError):
          # Doesn't exist in PATH or isn't executable
          return None, None
      found = search_version(found)
      if p.returncode == 0:
          if log:
              mlog.log('Found gcovr-{} at {}'.format(found, shlex.quote(shutil.which(gcovr_exe))))
          return gcovr_exe, mesonlib.version_compare(found, '>=' + version)
      return None, None
  
  def find_coverage_tools():
      gcovr_exe, gcovr_new_rootdir = detect_gcovr()
  
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      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, gcovr_new_rootdir, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5', log=False):
      for n in ['ninja', 'ninja-build', 'samu']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          found = found.strip()
          # 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):
              if log:
                  mlog.log('Found ninja-{} at {}'.format(found, shlex.quote(shutil.which(n))))
              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:
              if float(compiler.get_toolset_version()) < 10.0:
                  # On MSVC 2008 and earlier, check 'BUILD_PLAT', where
                  # 'Win32' means 'x86'
                  platform = os.environ.get('BUILD_PLAT', 'x86')
                  if platform == 'Win32':
                      return 'x86'
              elif 'VSCMD_ARG_TGT_ARCH' in os.environ:
                  # On MSVC 2017 'Platform' is not set in VsDevCmd.bat
                  return os.environ['VSCMD_ARG_TGT_ARCH']
              else:
                  # On MSVC 2010 and later 'Platform' is only set when the
                  # target arch is not 'x86'.  It's 'x64' when targeting
                  # x86_64 and 'arm' when targeting ARM.
                  platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'clang-cl' and not compiler.is_64:
              return 'x86'
          if compiler.id == 'gcc' and compiler.has_builtin_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.startswith('ppc64'):
          return 'ppc64'
      if trial == 'powerpc':
          # FreeBSD calls both ppc and ppc64 "powerpc".
          # https://github.com/mesonbuild/meson/issues/4397
          try:
              p, stdo, _ = Popen_safe(['uname', '-p'])
          except (FileNotFoundError, PermissionError):
              # Not much to go on here.
              if sys.maxsize > 2**32:
                  return 'ppc64'
              return 'ppc'
          if 'powerpc64' in stdo:
              return 'ppc64'
          return 'ppc'
      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_builtin_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_builtin_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
  
      if trial not in known_cpu_families:
          mlog.warning('Unknown CPU family {!r}, please report this at '
                       'https://github.com/mesonbuild/meson/issues/new with the'
                       'output of `uname -a` and `cat /proc/cpuinfo`'.format(trial))
  
      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_builtin_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      if trial == 'e2k':
          # Make more precise CPU detection for Elbrus platform.
          trial = platform.processor().lower()
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      system = platform.system().lower()
      if system.startswith('cygwin'):
          return 'cygwin'
      return system
  
  def detect_msys2_arch():
      if 'MSYSTEM_CARCH' in os.environ:
          return os.environ['MSYSTEM_CARCH']
      return None
  
  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 = re.search(version_regex, text)
      if match:
          return match.group(0)
      return 'unknown version'
  
  class Environment:
      private_dir = 'meson-private'
      log_dir = 'meson-logs'
  
      def __init__(self, source_dir, build_dir, options):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.scratch_dir = os.path.join(build_dir, Environment.private_dir)
          self.log_dir = os.path.join(build_dir, Environment.log_dir)
          os.makedirs(self.scratch_dir, exist_ok=True)
          os.makedirs(self.log_dir, exist_ok=True)
          try:
              self.coredata = coredata.load(self.get_build_dir())
              self.first_invocation = False
          except FileNotFoundError:
              self.create_new_coredata(options)
          except MesonException as e:
              # If we stored previous command line options, we can recover from
              # a broken/outdated coredata.
              if os.path.isfile(coredata.get_cmd_line_file(self.build_dir)):
                  mlog.warning('Regenerating configuration from scratch.')
                  mlog.log('Reason:', mlog.red(str(e)))
                  coredata.read_cmd_line_file(self.build_dir, options)
                  self.create_new_coredata(options)
              else:
                  raise e
          self.exe_wrapper = None
  
          self.machines = MachineInfos()
          # Will be fully initialized later using compilers later.
          self.machines.detect_build()
          if self.coredata.cross_file:
              self.cross_info = CrossBuildInfo(self.coredata.cross_file)
              if 'exe_wrapper' in self.cross_info.config['binaries']:
                  from .dependencies import ExternalProgram
                  self.exe_wrapper = ExternalProgram.from_bin_list(
                      self.cross_info.config['binaries'], 'exe_wrapper')
              if 'host_machine' in self.cross_info.config:
                  self.machines.host = MachineInfo.from_literal(
                      self.cross_info.config['host_machine'])
              if 'target_machine' in self.cross_info.config:
                  self.machines.target = MachineInfo.from_literal(
                      self.cross_info.config['target_machine'])
          else:
              self.cross_info = None
          self.machines.default_missing()
  
          if self.coredata.config_files:
              self.config_info = coredata.ConfigData(
                  coredata.load_configs(self.coredata.config_files))
          else:
              self.config_info = coredata.ConfigData()
  
          self.cmd_line_options = options.cmd_line_options.copy()
  
          # List of potential compilers.
          if mesonlib.is_windows():
              self.default_c = ['cl', 'cc', 'gcc', 'clang', 'clang-cl']
              self.default_cpp = ['cl', 'c++', 'g++', 'clang++', 'clang-cl']
          else:
              self.default_c = ['cc', 'gcc', 'clang']
              self.default_cpp = ['c++', 'g++', 'clang++']
          if mesonlib.is_windows():
              self.default_cs = ['csc', 'mcs']
          else:
              self.default_cs = ['mcs', 'csc']
          self.default_objc = ['cc']
          self.default_objcpp = ['c++']
          self.default_d = ['ldc2', 'ldc', 'gdc', 'dmd']
          self.default_fortran = ['gfortran', 'g95', 'f95', 'f90', 'f77', 'ifort']
          self.default_java = ['javac']
          self.default_rust = ['rustc']
          self.default_swift = ['swiftc']
          self.default_vala = ['valac']
          self.default_static_linker = ['ar']
          self.vs_static_linker = ['lib']
          self.clang_cl_static_linker = ['llvm-lib']
          self.gcc_static_linker = ['gcc-ar']
          self.clang_static_linker = ['llvm-ar']
  
          # Various prefixes and suffixes for import libraries, shared libraries,
          # static libraries, and executables.
          # Versioning is added to these names in the backends as-needed.
          cross = self.is_cross_build()
          if mesonlib.for_windows(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'obj'
              self.win_libdir_layout = True
          elif mesonlib.for_cygwin(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'o'
              self.win_libdir_layout = True
          else:
              self.exe_suffix = ''
              self.object_suffix = 'o
  
  [... the rest is omitted ...]
files: mesonbuild/environment.py
files: # 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 configparser, os, platform, re, sys, shlex, shutil, subprocess
  
  from . import coredata
  from .linkers import ArLinker, ArmarLinker, VisualStudioLinker, DLinker, CcrxLinker
  from . import mesonlib
  from .mesonlib import MesonException, EnvironmentException, PerMachine, Popen_safe
  from . import mlog
  
  from . import compilers
  from .compilers import (
      CompilerType,
      is_assembly,
      is_header,
      is_library,
      is_llvm_ir,
      is_object,
      is_source,
  )
  from .compilers import (
      ArmCCompiler,
      ArmCPPCompiler,
      ArmclangCCompiler,
      ArmclangCPPCompiler,
      ClangCCompiler,
      ClangCPPCompiler,
      ClangObjCCompiler,
      ClangObjCPPCompiler,
      ClangClCCompiler,
      ClangClCPPCompiler,
      G95FortranCompiler,
      GnuCCompiler,
      GnuCPPCompiler,
      GnuFortranCompiler,
      GnuObjCCompiler,
      GnuObjCPPCompiler,
      ElbrusCCompiler,
      ElbrusCPPCompiler,
      ElbrusFortranCompiler,
      IntelCCompiler,
      IntelCPPCompiler,
      IntelFortranCompiler,
      JavaCompiler,
      MonoCompiler,
      VisualStudioCsCompiler,
      NAGFortranCompiler,
      Open64FortranCompiler,
      PathScaleFortranCompiler,
      PGIFortranCompiler,
      RustCompiler,
      CcrxCCompiler,
      CcrxCPPCompiler,
      SunFortranCompiler,
      ValaCompiler,
      VisualStudioCCompiler,
      VisualStudioCPPCompiler,
  )
  
  build_filename = 'meson.build'
  
  known_cpu_families = (
      'aarch64',
      'arc',
      'arm',
      'e2k',
      'ia64',
      'mips',
      'mips64',
      'parisc',
      'ppc',
      'ppc64',
      'riscv32',
      'riscv64',
      'rx',
      's390x',
      'sparc',
      'sparc64',
      'x86',
      'x86_64'
  )
  
  def detect_gcovr(version='3.1', log=False):
      gcovr_exe = 'gcovr'
      try:
          p, found = Popen_safe([gcovr_exe, '--version'])[0:2]
      except (FileNotFoundError, PermissionError):
          # Doesn't exist in PATH or isn't executable
          return None, None
      found = search_version(found)
      if p.returncode == 0:
          if log:
              mlog.log('Found gcovr-{} at {}'.format(found, shlex.quote(shutil.which(gcovr_exe))))
          return gcovr_exe, mesonlib.version_compare(found, '>=' + version)
      return None, None
  
  def find_coverage_tools():
      gcovr_exe, gcovr_new_rootdir = detect_gcovr()
  
      lcov_exe = 'lcov'
      genhtml_exe = 'genhtml'
  
      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, gcovr_new_rootdir, lcov_exe, genhtml_exe
  
  def detect_ninja(version='1.5', log=False):
      for n in ['ninja', 'ninja-build', 'samu']:
          try:
              p, found = Popen_safe([n, '--version'])[0:2]
          except (FileNotFoundError, PermissionError):
              # Doesn't exist in PATH or isn't executable
              continue
          found = found.strip()
          # 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):
              if log:
                  mlog.log('Found ninja-{} at {}'.format(found, shlex.quote(shutil.which(n))))
              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:
              if float(compiler.get_toolset_version()) < 10.0:
                  # On MSVC 2008 and earlier, check 'BUILD_PLAT', where
                  # 'Win32' means 'x86'
                  platform = os.environ.get('BUILD_PLAT', 'x86')
                  if platform == 'Win32':
                      return 'x86'
              else:
                  # On MSVC 2010 and later 'Platform' is only set when the
                  # target arch is not 'x86'.  It's 'x64' when targeting
                  # x86_64 and 'arm' when targeting ARM.
                  platform = os.environ.get('Platform', 'x86').lower()
              if platform == 'x86':
                  return platform
          if compiler.id == 'clang-cl' and not compiler.is_64:
              return 'x86'
          if compiler.id == 'gcc' and compiler.has_builtin_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.startswith('ppc64'):
          return 'ppc64'
      if trial == 'powerpc':
          # FreeBSD calls both ppc and ppc64 "powerpc".
          # https://github.com/mesonbuild/meson/issues/4397
          try:
              p, stdo, _ = Popen_safe(['uname', '-p'])
          except (FileNotFoundError, PermissionError):
              # Not much to go on here.
              if sys.maxsize > 2**32:
                  return 'ppc64'
              return 'ppc'
          if 'powerpc64' in stdo:
              return 'ppc64'
          return 'ppc'
      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_builtin_define('__i386__'):
                      return 'x86'
              except mesonlib.MesonException:
                  # Ignore compilers that do not support has_builtin_define.
                  pass
          return 'x86_64'
      # Add fixes here as bugs are reported.
  
      if trial not in known_cpu_families:
          mlog.warning('Unknown CPU family {!r}, please report this at '
                       'https://github.com/mesonbuild/meson/issues/new with the'
                       'output of `uname -a` and `cat /proc/cpuinfo`'.format(trial))
  
      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_builtin_define('__i386__'):
                      return 'i686' # All 64 bit cpus have at least this level of x86 support.
              except mesonlib.MesonException:
                  pass
          return 'x86_64'
      if trial == 'e2k':
          # Make more precise CPU detection for Elbrus platform.
          trial = platform.processor().lower()
      # Add fixes here as bugs are reported.
      return trial
  
  def detect_system():
      system = platform.system().lower()
      if system.startswith('cygwin'):
          return 'cygwin'
      return system
  
  def detect_msys2_arch():
      if 'MSYSTEM_CARCH' in os.environ:
          return os.environ['MSYSTEM_CARCH']
      return None
  
  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 = re.search(version_regex, text)
      if match:
          return match.group(0)
      return 'unknown version'
  
  class Environment:
      private_dir = 'meson-private'
      log_dir = 'meson-logs'
  
      def __init__(self, source_dir, build_dir, options):
          self.source_dir = source_dir
          self.build_dir = build_dir
          self.scratch_dir = os.path.join(build_dir, Environment.private_dir)
          self.log_dir = os.path.join(build_dir, Environment.log_dir)
          os.makedirs(self.scratch_dir, exist_ok=True)
          os.makedirs(self.log_dir, exist_ok=True)
          try:
              self.coredata = coredata.load(self.get_build_dir())
              self.first_invocation = False
          except FileNotFoundError:
              self.create_new_coredata(options)
          except MesonException as e:
              # If we stored previous command line options, we can recover from
              # a broken/outdated coredata.
              if os.path.isfile(coredata.get_cmd_line_file(self.build_dir)):
                  mlog.warning('Regenerating configuration from scratch.')
                  mlog.log('Reason:', mlog.red(str(e)))
                  coredata.read_cmd_line_file(self.build_dir, options)
                  self.create_new_coredata(options)
              else:
                  raise e
          self.exe_wrapper = None
  
          self.machines = MachineInfos()
          # Will be fully initialized later using compilers later.
          self.machines.detect_build()
          if self.coredata.cross_file:
              self.cross_info = CrossBuildInfo(self.coredata.cross_file)
              if 'exe_wrapper' in self.cross_info.config['binaries']:
                  from .dependencies import ExternalProgram
                  self.exe_wrapper = ExternalProgram.from_bin_list(
                      self.cross_info.config['binaries'], 'exe_wrapper')
              if 'host_machine' in self.cross_info.config:
                  self.machines.host = MachineInfo.from_literal(
                      self.cross_info.config['host_machine'])
              if 'target_machine' in self.cross_info.config:
                  self.machines.target = MachineInfo.from_literal(
                      self.cross_info.config['target_machine'])
          else:
              self.cross_info = None
          self.machines.default_missing()
  
          if self.coredata.config_files:
              self.config_info = coredata.ConfigData(
                  coredata.load_configs(self.coredata.config_files))
          else:
              self.config_info = coredata.ConfigData()
  
          self.cmd_line_options = options.cmd_line_options.copy()
  
          # List of potential compilers.
          if mesonlib.is_windows():
              self.default_c = ['cl', 'cc', 'gcc', 'clang', 'clang-cl']
              self.default_cpp = ['cl', 'c++', 'g++', 'clang++', 'clang-cl']
          else:
              self.default_c = ['cc', 'gcc', 'clang']
              self.default_cpp = ['c++', 'g++', 'clang++']
          if mesonlib.is_windows():
              self.default_cs = ['csc', 'mcs']
          else:
              self.default_cs = ['mcs', 'csc']
          self.default_objc = ['cc']
          self.default_objcpp = ['c++']
          self.default_d = ['ldc2', 'ldc', 'gdc', 'dmd']
          self.default_fortran = ['gfortran', 'g95', 'f95', 'f90', 'f77', 'ifort']
          self.default_java = ['javac']
          self.default_rust = ['rustc']
          self.default_swift = ['swiftc']
          self.default_vala = ['valac']
          self.default_static_linker = ['ar']
          self.vs_static_linker = ['lib']
          self.clang_cl_static_linker = ['llvm-lib']
          self.gcc_static_linker = ['gcc-ar']
          self.clang_static_linker = ['llvm-ar']
  
          # Various prefixes and suffixes for import libraries, shared libraries,
          # static libraries, and executables.
          # Versioning is added to these names in the backends as-needed.
          cross = self.is_cross_build()
          if mesonlib.for_windows(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'obj'
              self.win_libdir_layout = True
          elif mesonlib.for_cygwin(cross, self):
              self.exe_suffix = 'exe'
              self.object_suffix = 'o'
              self.win_libdir_layout = True
          else:
              self.exe_suffix = ''
              self.object_suffix = 'o'
              self.win_libdir_layout = False
          if 'STRIP' in os.environ:
              self.native_strip_bin = shlex.split(
                  os.environ[BinaryTable.evarMap['strip']])
          else:
  
  
  [... the rest is omitted ...]
files: mesonbuild/environment.py