Address comments in 8921029 extract_from_cab script now takes a global lock while extracting fro...

build/extract_from_cab.py

Index: build/extract_from_cab.py
===================================================================
--- build/extract_from_cab.py	(revision 114132)
+++ build/extract_from_cab.py	(working copy)
@@ -12,6 +12,7 @@
 
 lock_file = os.path.join(tempfile.gettempdir(), 'expand.lock')
 
+
 def acquire_lock():
   while True:
     try:
@@ -20,13 +21,15 @@
     except OSError as e:
       if e.errno != errno.EEXIST:
         raise
-      print 'Cab extraction could not get exclusive lock. Retrying in 1 sec...'
-      time.sleep(1000)
+      print 'Cab extraction could not get exclusive lock. Retrying in 100ms...'
+      time.sleep(0.1)
 
+
 def release_lock(fd):
   os.close(fd)
   os.unlink(lock_file)
 
+
 def main():
   if len(sys.argv) != 4:
     print 'Usage: extract_from_cab.py cab_path archived_file output_dir'
@@ -40,13 +43,7 @@
     level = subprocess.call(
         ['expand', cab_path, '-F:' + archived_file, output_dir])
     if level != 0:
-      print 'Cab extraction(%s, %s, %s) failed.' % (
-          cab_path, archived_file, output_dir)
-      print 'Trying a second time.'
-      level = subprocess.call(
-          ['expand', cab_path, '-F:' + archived_file, output_dir])
-      if level != 0:
-        return level
+      return level
   finally:
     release_lock(lock_fd)