contrib/svn-fe/svnrdump_sim.py

   1 #!/usr/bin/python
   2 """
   3 Simulates svnrdump by replaying an existing dump from a file, taking care
   4 of the specified revision range.
   5 To simulate incremental imports the environment variable SVNRMAX can be set
   6 to the highest revision that should be available.
   7 """
   8 import sys, os
   9
  10
  11 def getrevlimit():
  12         var = 'SVNRMAX'
  13         if os.environ.has_key(var):
  14                 return os.environ[var]
  15         return None
  16
  17 def writedump(url, lower, upper):
  18         if url.startswith('sim://'):
  19                 filename = url[6:]
  20                 if filename[-1] == '/': filename = filename[:-1] #remove terminating slash
  21         else:
  22                 raise ValueError('sim:// url required')
  23         f = open(filename, 'r');
  24         state = 'header'
  25         wroterev = False
  26         while(True):
  27                 l = f.readline()
  28                 if l == '': break
  29                 if state == 'header' and l.startswith('Revision-number: '):
  30                         state = 'prefix'
  31                 if state == 'prefix' and l == 'Revision-number: %s\n' % lower:
  32                         state = 'selection'
  33                 if not upper == 'HEAD' and state == 'selection' and l == 'Revision-number: %s\n' % upper:
  34                         break;
  35
  36                 if state == 'header' or state == 'selection':
  37                         if state == 'selection': wroterev = True
  38                         sys.stdout.write(l)
  39         return wroterev
  40
  41 if __name__ == "__main__":
  42         if not (len(sys.argv) in (3, 4, 5)):
  43                 print "usage: %s dump URL -rLOWER:UPPER"
  44                 sys.exit(1)
  45         if not sys.argv[1] == 'dump': raise NotImplementedError('only "dump" is suppported.')
  46         url = sys.argv[2]
  47         r = ('0', 'HEAD')
  48         if len(sys.argv) == 4 and sys.argv[3][0:2] == '-r':
  49                 r = sys.argv[3][2:].lstrip().split(':')
  50         if not getrevlimit() is None: r[1] = getrevlimit()
  51         if writedump(url, r[0], r[1]): ret = 0
  52         else: ret = 1
  53         sys.exit(ret)