static Stmt qTags;
  int nBaseFilter;
  int nFilter;
  int rid;
  const char *zParentBranch = 0;
  Blob mcksum;

  nBaseFilter = blob_size(&gsvn.filter);
  if( !gsvn.flatFlag ){
    if( strncmp(gsvn.zBranch, gsvn.zTrunk, gsvn.lenTrunk-1)==0 ){
      blob_appendf(&gsvn.filter, "%s*", gsvn.zTrunk);
    }else{
      blob_appendf(&gsvn.filter, "%s%s/*", gsvn.zBranches, gsvn.zBranch);
    }
  }else{
    blob_append(&gsvn.filter, "*", 1);
  }
  if( db_int(0, "SELECT 1 FROM xhist WHERE trev=%d AND tpath GLOB %Q LIMIT 1",
             gsvn.rev, blob_str(&gsvn.filter))==0
  ){
    blob_resize(&gsvn.filter, nBaseFilter);
    return;
  }
  db_static_prepare(&insRev, "REPLACE INTO xrevisions (trev, tbranch, tuuid) "
                             "VALUES(:rev, :branch, "
                             " (SELECT uuid FROM blob WHERE rid=:rid))");
  db_static_prepare(&qParent, "SELECT tuuid, tbranch FROM xrevisions "
                              "WHERE trev=:rev");
  db_static_prepare(&qFiles, "SELECT tpath, trid, tperm FROM xfiles "
                             "WHERE tpath GLOB :filter ORDER BY tpath");

  blob_zero(&manifest);
  if( gsvn.zComment ){
    blob_appendf(&manifest, "C %F\n", gsvn.zComment);
  }else{
    blob_append(&manifest, "C (no\\scomment)\n", 16);
  }
  blob_appendf(&manifest, "D %s\n", gsvn.zDate);
  nBaseFilter = blob_size(&gsvn.filter);
  nFilter = blob_size(&gsvn.filter)-1;
  if( !gsvn.flatFlag ){
    if( strncmp(gsvn.zBranch, gsvn.zTrunk, gsvn.lenTrunk-1)==0 ){
      blob_appendf(&gsvn.filter, "%s*", gsvn.zTrunk);
    }else{
      blob_appendf(&gsvn.filter, "%s%s/*", gsvn.zBranches, gsvn.zBranch);
    }
  }else{
    blob_append(&gsvn.filter, "*", 1);
  }
  db_bind_text(&qFiles, ":filter", blob_str(&gsvn.filter));
  nFilter = blob_size(&gsvn.filter)-1;
  while( db_step(&qFiles)==SQLITE_ROW ){
    const char *zFile = db_column_text(&qFiles, 0);
    int rid = db_column_int(&qFiles, 1);
    const char *zPerm = db_column_text(&qFiles, 2);
    const char *zUuid;
    zUuid = db_text("", "SELECT uuid FROM blob WHERE rid=%d", rid);
    blob_appendf(&manifest, "F %F %s %s\n", zFile+nFilter, zUuid, zPerm);

    blob_appendf(&manifest, "U %F\n", zUserOvrd ? zUserOvrd : login_name());
  }
  md5sum_blob(&manifest, &mcksum);
  blob_appendf(&manifest, "Z %b\n", &mcksum);
  blob_reset(&mcksum);

  rid = content_put(&manifest);
  blob_reset(&manifest);
  db_bind_int(&insRev, ":rev", gsvn.rev);
  db_bind_text(&insRev, ":branch", gsvn.zBranch);
  db_bind_int(&insRev, ":rid", rid);
  db_step(&insRev);
  blob_reset(&manifest);
}

static u64 svn_get_varint(const char **pz){
  unsigned int v = 0;
  do{
    v = (v<<7) | ((*pz)[0]&0x7f);
  }while( (*pz)++[0]&0x80 );

**                behaviour is to treat 3 folders in the SVN root as special,
**                following the common layout of SVN repositories. These are
**                (by default) trunk/, branches/ and tags/
**                Options:
**                  --trunk FOLDER     Name of trunk folder
**                  --branches FOLDER  Name of branches folder
**                  --tags FOLDER      Name of tags folder
**                  --fiter PATH       Path to project root in repository
**                  --filter PATH      Path to project root in repository
**                  --flat             The whole dump is a single branch
**
** The --incremental option allows an existing repository to be extended
** with new content.
**
** Options:
**   --incremental  allow importing into an existing repository