old_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  import os
  from download import Downloader
  from subprocess import check_call
  
  build = os.environ['BUILD']
  cmake_command = ['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + os.environ['CONFIG']]
  build_command = ['msbuild', '/m:4', '/p:Config=' + os.environ['CONFIG'], 'FORMAT.sln']
  test_command = ['msbuild', 'RUN_TESTS.vcxproj']
  if build == 'mingw':
    # Install MinGW.
    mingw_url = 'http://downloads.sourceforge.net/project/mingw-w64/' + \
      'Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/' + \
      '4.9.2/threads-win32/seh/x86_64-4.9.2-release-win32-seh-rt_v3-rev1.7z'
    with Downloader().download(mingw_url) as f:
      check_call(['7z', 'x', '-oC:\\', f])
      
    # Remove path to Git bin directory from $PATH because it breaks MinGW config.
    path = os.environ['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
  
    os.environ['PATH'] = r'C:\Program Files (x86)\MSBUILD\12.0\bin\;' + path + r';C:\mingw64\bin'
    cmake_command.append('-GMinGW Makefiles')
    build_command = ['mingw32-make', '-j4']
    test_command = ['mingw32-make', 'test']
  
  check_call(cmake_command)
  check_call(build_command)
  
new_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  import os
  from download import Downloader
  from subprocess import check_call
  
  build = os.environ['BUILD']
  cmake_command = ['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + os.environ['CONFIG']]
  build_command = ['msbuild', '/m:4', '/p:Config=' + os.environ['CONFIG'], 'FORMAT.sln']
  test_command = ['msbuild', 'RUN_TESTS.vcxproj']
  if build == 'mingw':
    # Install MinGW.
    mingw_url = 'http://ufpr.dl.sourceforge.net/project/mingw-w64/' + \
      'Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/' + \
      '4.9.2/threads-win32/seh/x86_64-4.9.2-release-win32-seh-rt_v3-rev1.7z'
    with Downloader().download(mingw_url) as f:
      check_call(['7z', 'x', '-oC:\\', f])
      
    # Remove path to Git bin directory from $PATH because it breaks MinGW config.
    path = os.environ['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
  
    os.environ['PATH'] = r'C:\Program Files (x86)\MSBUILD\12.0\bin\;' + path + r';C:\mingw64\bin'
    cmake_command.append('-GMinGW Makefiles')
    build_command = ['mingw32-make', '-j4']
    test_command = ['mingw32-make', 'test']
  
  check_call(cmake_command)
  check_call(build_command)
  
subject: Use mirror