Make missing or misspelled DLLs a build-time failure

chrome/tools/build/win/create_installer_archive.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Script to create Chrome Installer archive.
 
   This script is used to create an archive of all the files required for a
   Chrome install in appropriate directory structure. It reads chrome.release
   file as input, creates chrome.7z archive, compresses setup.exe and
@@ skipping 501 matching lines @@
                                 # DLLs needed due to source sets.
                                 'base_i18n.dll',
                                 'ipc.dll',
                                 'net.dll',
                                 'prefs.dll',
                                 'protobuf_lite.dll',
                                 'url_lib.dll' ]
   for setup_component_dll_glob in setup_component_dll_globs:
     setup_component_dlls = glob.glob(os.path.join(build_dir,
                                                   setup_component_dll_glob))
+    if len(setup_component_dlls) == 0:
+      raise Exception('Error: missing expected DLL for component build '
+                      'mini_installer: "%s"' % setup_component_dll_glob)
     for setup_component_dll in setup_component_dlls:
       g_archive_inputs.append(setup_component_dll)
       shutil.copy(setup_component_dll, installer_dir)
 
   # Stage all the component DLLs found in |build_dir| to the |version_dir| (for
   # the version assembly to be able to refer to them below and make sure
   # chrome.exe can find them at runtime). The component DLLs are considered to
   # be all the DLLs which have not already been added to the |version_dir| by
   # virtue of chrome.release.
   build_dlls = glob.glob(os.path.join(build_dir, '*.dll'))
@@ skipping 146 matching lines @@
                                               MINI_INSTALLER_INPUT_FILE)
 
   return options
 
 
 if '__main__' == __name__:
   options = _ParseOptions()
   if options.verbose:
     print sys.argv
   sys.exit(main(options))