GN(android): Add work-around for "project database corrupted" error

build/android/gyp/javac.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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 optparse
 import os
 import shutil
 import re
@@ skipping 220 matching lines @@
       # Don't include the output directory in the initial set of args since it
       # being in a temp dir makes it unstable (breaks md5 stamping).
       cmd = javac_cmd + ['-d', classes_dir] + java_files
 
       # JMake prints out some diagnostic logs that we want to ignore.
       # This assumes that all compiler output goes through stderr.
       stdout_filter = lambda s: ''
       if md5_check.PRINT_EXPLANATIONS:
         stdout_filter = None
 
-      build_utils.CheckOutput(
+      attempt_build = lambda: build_utils.CheckOutput(
           cmd,
           print_stdout=options.chromium_code,
           stdout_filter=stdout_filter,
           stderr_filter=ColorJavacOutput)
+      try:
+        attempt_build()
+      except build_utils.CalledProcessError as e:
+        # Work-around for a bug in jmake (http://crbug.com/551449).

[Yaron, 2015/11/04 16:45:13]

yowza - now that's a hack!
There's also no guarantee that the second attempt will work. At a minimum,
please add a log that we're retrying.

Can you file an upstream bug against jmake?

[agrieve, 2015/11/04 18:20:22]

It should always work the second time since there is now no longer a pdb file to
load (error happens at start-up).

Add a log message so we can at least get a feel for how often it's triggered.

Filed: https://github.com/pantsbuild/jmake/issues/22

+        if 'project database corrupted' in e.output:
+          os.unlink(pdb_path)
+          attempt_build()
 
     if options.main_class or options.manifest_entry:
       entries = []
       if options.manifest_entry:
         entries = [e.split(':') for e in options.manifest_entry]
       manifest_file = os.path.join(temp_dir, 'manifest')
       _CreateManifest(manifest_file, runtime_classpath, options.main_class,
                       entries)
     else:
       manifest_file = None
@@ skipping 182 matching lines @@
       options,
       input_paths=input_paths,
       input_strings=javac_cmd,
       output_paths=output_paths,
       force=force,
       pass_changes=True)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))