1 #!/usr/bin/env python 2 3 # Copyright (c) 2010 Google Inc. All rights reserved. 4 # Use of this source code is governed by a BSD-style license that can be 5 # found in the LICENSE file. 6 7 import sys 8 import time 9 10 output = sys.argv[1] 11 persistoutput = "%s.persist" % sys.argv[1] 12 13 count = 0 14 try: 15 count = open(persistoutput, 'r').read() 16 except: 17 pass 18 count = int(count) + 1 19 20 if len(sys.argv) > 2: 21 max_count = int(sys.argv[2]) 22 if count > max_count: 23 count = max_count 24 25 oldcount = 0 26 try: 27 oldcount = open(output, 'r').read() 28 except: 29 pass 30 31 # Save the count in a file that is undeclared, and thus hidden, to gyp. We need 32 # to do this because, prior to running commands, some build systems deletes 33 # any declared outputs, so we would lose our count if we just wrote to the 34 # given output file. 35 open(persistoutput, 'w').write('%d' % (count)) 36 37 # Only write the given output file if the count has changed. 38 if int(oldcount) != count: 39 open(output, 'w').write('%d' % (count)) 40 # Sleep so the next run changes the file time sufficiently to make the build 41 # detect the file as changed. 42 time.sleep(1) 43 44 sys.exit(0) 45
