utils/git/find-rev

   1 #!/usr/bin/python
   2
   3 import os, sys, subprocess
   4
   5 def main():
   6     from optparse import OptionParser, OptionGroup
   7     parser = OptionParser("usage: %prog [options] <repo> <revision>")
   8     parser.add_option("", "--branch", dest="branch",
   9                       help="Ref for the branch to search [%default]",
  10                       action="store", default="git-svn")
  11     (opts, args) = parser.parse_args()
  12
  13     if len(args) != 2:
  14         parser.error("invalid number of arguments")
  15
  16     repo,rev = args
  17
  18     try:
  19         rev = int(rev)
  20     except:
  21         parser.error("invalid revision argument (not an integer)")
  22
  23     os.chdir(repo)
  24     p = subprocess.Popen(['git', 'rev-list', opts.branch, '--pretty'],
  25                          stdout=subprocess.PIPE)
  26
  27     bestRev = bestCommit = None
  28     lastCommit = None
  29     for ln in p.stdout:
  30         if ln.startswith('commit '):
  31             lastCommit = ln.split(' ',2)[1]
  32         elif ln.startswith('    git-svn-id: '):
  33             _,repo,_ = ln.strip().split(' ')
  34             _,lrev = repo.rsplit('@',1)
  35             lrev = int(lrev)
  36             if lrev<=rev:
  37                 if bestRev is None or lrev>bestRev:
  38                     assert lastCommit
  39                     bestCommit = lastCommit
  40                     bestRev = lrev
  41                     if lrev == rev:
  42                         break
  43
  44     if bestCommit is not None:
  45         print bestCommit
  46         sys.exit(0)
  47     sys.exit(1)
  48
  49 if __name__=='__main__':
  50     main()