#!/usr/bin/env python## USAGE: blame.py [-r REV] repos-path file#import sysimport osimport getoptimport difflibfrom svn import fs, core, reposCHUNK_SIZE = 100000def blame(path, filename, rev=None):    annotresult = {}  path = core.svn_path_canonicalize(path)  repos_ptr = repos.open(path)  fsob = repos.fs(repos_ptr)   if rev is None:    rev = fs.youngest_rev(fsob)  filedata = ''   for i in xrange(0, rev+1):    root = fs.revision_root(fsob, i)    if fs.check_path(root, filename) != core.svn_node_none:      first = i      break  print "First revision is %d" % first  print "Last revision is %d" % rev  for i in xrange(first, rev+1):    previousroot = root    root = fs.revision_root(fsob, i)    if i != first:      if not fs.contents_changed(root, filename, previousroot, filename):        continue          file = fs.file_contents(root, filename)    previousdata = filedata    filedata = ''    while 1:      data = core.svn_stream_read(file, CHUNK_SIZE)      if not data:        break      filedata = filedata + data    print "Current revision is %d" % i    diffresult = difflib.ndiff(previousdata.splitlines(1),                               filedata.splitlines(1))    #    print ''.join(diffresult)    k = 0        for j in diffresult:      if j[0] == ' ':        if annotresult.has_key (k):          k = k + 1          continue        else:	  annotresult[k] = (i, j[2:])          k = k + 1          continue      elif j[0] == '?':        continue      annotresult[k] = (i, j[2:])      if j[0] != '-':        k = k + 1#    print ''.join(diffresult)#  print annotresult   for x in xrange(len(annotresult.keys())):     sys.stdout.write("Line %d (rev %d):%s" % (x,                                               annotresult[x][0],                                               annotresult[x][1]))def usage():  print "USAGE: blame.py [-r REV] repos-path file"  sys.exit(1)def main():  opts, args = getopt.getopt(sys.argv[1:], 'r:')  if len(args) != 2:    usage()  rev = None  for name, value in opts:    if name == '-r':      rev = int(value)  blame(args[0], args[1], rev)if __name__ == '__main__':  main()