if( is_a_leaf(rid) ){
      if( db_int(0, "SELECT 1 FROM tagxref AS tx"
                    " WHERE tx.rid=%d"
                    " AND tx.tagid=%d"
                    " AND tx.tagtype>0",
                    rid, TAG_CLOSED)){
        fossil_print("%s\n", "closed");
      }else if( fossil_find_nearest_fork(rid) ){
        fossil_print("%s\n", "fork");
        isFork = 1;
      }else{
        fossil_print("%s\n", "open");
      }
    }else{
      fossil_print("no\n");

  }else{
    db_static_prepare(&addLeaf, "INSERT OR IGNORE INTO leaf VALUES(:rid)");
    db_bind_int(&addLeaf, ":rid", rid);
    db_step(&addLeaf);
    db_reset(&addLeaf);
  }
}










/*
** Return an SQL expression (stored in memory obtained from fossil_malloc())
** that is true if the SQL variable named "zVar" contains the rid with
** a CLOSED tag.  In other words, return true if the leaf is closed.
**
** The result can be prefaced with a NOT operator to get all leaves that

  while( db_step(&parentsOf)==SQLITE_ROW ){
    bag_insert(&needToCheck, db_column_int(&parentsOf, 0));
  }
  db_reset(&parentsOf);
}

/*
** Do all pending leaf checks.
*/
void leaf_do_pending_checks(void){
  int rid;
  for(rid=bag_first(&needToCheck); rid; rid=bag_next(&needToCheck,rid)){
    leaf_check(rid);



  }
  bag_clear(&needToCheck);
}

  FILE *httpIn;           /* Accept HTTP input from here */
  FILE *httpOut;          /* Send HTTP output here */
  int xlinkClusterOnly;   /* Set when cloning.  Only process clusters */
  int fTimeFormat;        /* 1 for UTC.  2 for localtime.  0 not yet selected */
  int *aCommitFile;       /* Array of files to be committed */
  int markPrivate;        /* All new artifacts are private if true */
  int clockSkewSeen;      /* True if clocks on client and server out of sync */

  int wikiFlags;          /* Wiki conversion flags applied to %W */
  char isHTTP;            /* True if server/CGI modes, else assume CLI. */
  char javascriptHyperlink; /* If true, set href= using script, not HTML */
  Blob httpHeader;        /* Complete text of the HTTP request header */
  UrlData url;            /* Information about current URL */
  const char *zLogin;     /* Login name.  NULL or "" if not logged in. */
  const char *zSSLIdentity;  /* Value of --ssl-identity option, filename of

  db_finalize(&q);
}


/* Pick the most recent leaf that is (1) not equal to vid and (2)
** has not already been merged into vid and (3) the leaf is not
** closed and (4) the leaf is in the same branch as vid.


*/
int fossil_find_nearest_fork(int vid){



  return db_int(0,


    "SELECT leaf.rid"
    "  FROM leaf, event"
    " WHERE leaf.rid=event.objid"
    "   AND leaf.rid!=%d"                                /* Constraint (1) */




    "   AND leaf.rid NOT IN (SELECT merge FROM vmerge)"  /* Constraint (2) */



    "   AND NOT EXISTS(SELECT 1 FROM tagxref"            /* Constraint (3) */
                  "     WHERE rid=leaf.rid"
                  "       AND tagid=%d"
                  "       AND tagtype>0)"
    "   AND (SELECT value FROM tagxref"                  /* Constraint (4) */
          "   WHERE tagid=%d AND rid=%d AND tagtype>0) ="
          " (SELECT value FROM tagxref"
          "   WHERE tagid=%d AND rid=leaf.rid AND tagtype>0)"
    " ORDER BY event.mtime DESC LIMIT 1",
    vid, TAG_CLOSED, TAG_BRANCH, vid, TAG_BRANCH
  );







}

/*
** COMMAND: merge
**
** Usage: %fossil merge ?OPTIONS? ?VERSION?
**

    ** the leaf is not closed and (4) the leaf is in the same branch
    ** as the current checkout.
    */
    Stmt q;
    if( pickFlag || backoutFlag || integrateFlag){
      fossil_fatal("cannot use --backout, --cherrypick or --integrate with a fork merge");
    }
    mid = fossil_find_nearest_fork(vid);
    if( mid==0 ){
      fossil_fatal("no unmerged forks of branch \"%s\"",
        db_text(0, "SELECT value FROM tagxref"
                   " WHERE tagid=%d AND rid=%d AND tagtype>0",
                   TAG_BRANCH, vid)
      );
    }

  int nFileSent;      /* Number of files sent */
  int nDeltaSent;     /* Number of deltas sent */
  int nFileRcvd;      /* Number of files received */
  int nDeltaRcvd;     /* Number of deltas received */
  int nDanglingFile;  /* Number of dangling deltas received */
  int mxSend;         /* Stop sending "file" when pOut reaches this size */
  int resync;         /* Send igot cards for all holdings */
  int fHasFork;       /* True if a fork has been seen */
  u8 syncPrivate;     /* True to enable syncing private content */
  u8 nextIsPrivate;   /* If true, next "file" received is a private */
  time_t maxTime;     /* Time when this transfer should be finished */
};


/*

  blob_reset(&hash);
  if( rid==0 ){
    blob_appendf(&pXfer->err, "%s", g.zErrMsg);
    blob_reset(&content);
  }else{
    if( !isPriv ) content_make_public(rid);
    manifest_crosslink(rid, &content, MC_NO_ERRORS);
    if( cloneFlag==0 &&
        count_nonbranch_children(primary_parent_pid_from_rid(rid))>1 ){
      pXfer->fHasFork = 1;
    }
  }
  assert( blob_is_reset(&content) );
  remote_has(rid);
}

/*
** The aToken[0..nToken-1] blob array is a parse of a "cfile" line

    srcid = 0;
    pXfer->nFileRcvd++;
  }
  rid = content_put_ex(&content, blob_str(&pXfer->aToken[1]), srcid,
                       szC, isPriv);
  Th_AppendToList(pzUuidList, pnUuidList, blob_str(&pXfer->aToken[1]),
                  blob_size(&pXfer->aToken[1]));
  if( cloneFlag==0 &&
      count_nonbranch_children(primary_parent_pid_from_rid(rid))>1 ){
    pXfer->fHasFork = 1;
  }
  remote_has(rid);
  blob_reset(&content);
}

/*
** Try to send a file as a delta against its parent.
** If successful, return the number of bytes in the delta.

** message has been uncompressed and placed in the g.cgiIn blob.
** Process this message and form an appropriate reply.
*/
void page_xfer(void){
  int isPull = 0;
  int isPush = 0;
  int nErr = 0;
  int fForkSeen = 0;    /* True if fork was seen while receiving content */
  Xfer xfer;
  int deltaFlag = 0;
  int isClone = 0;
  int nGimme = 0;
  int size;
  int recvConfig = 0;
  char *zNow;

  }
  zScript = xfer_push_code();
  if( zScript ){ /* NOTE: Are TH1 transfer hooks enabled? */
    pzUuidList = &zUuidList;
    pnUuidList = &nUuidList;
  }
  while( blob_line(xfer.pIn, &xfer.line) ){
    xfer.fHasFork = 0;
    if( blob_buffer(&xfer.line)[0]=='#' ) continue;
    if( blob_size(&xfer.line)==0 ) continue;
    xfer.nToken = blob_tokenize(&xfer.line, xfer.aToken, count(xfer.aToken));

    /*   file UUID SIZE \n CONTENT
    **   file UUID DELTASRC SIZE \n CONTENT
    **
    ** Accept a file from the client.
    */
    if( blob_eq(&xfer.aToken[0], "file") ){
      if( !isPush ){
        cgi_reset_content();
        @ error not\sauthorized\sto\swrite
        nErr++;
        break;
      }
      xfer_accept_file(&xfer, 0, pzUuidList, pnUuidList);
      if( xfer.fHasFork ){
        fForkSeen = 1;
      }
      if( blob_size(&xfer.err) ){
        cgi_reset_content();
        @ error %T(blob_str(&xfer.err))
        nErr++;
        break;
      }
    }else

      if( !isPush ){
        cgi_reset_content();
        @ error not\sauthorized\sto\swrite
        nErr++;
        break;
      }
      xfer_accept_compressed_file(&xfer, 0, pzUuidList, pnUuidList);
      if( xfer.fHasFork ){
        fForkSeen = 1;
      }
      if( blob_size(&xfer.err) ){
        cgi_reset_content();
        @ error %T(blob_str(&xfer.err))
        nErr++;
        break;
      }
    }else

    {
      cgi_reset_content();
      @ error bad\scommand:\s%F(blob_str(&xfer.line))
    }
    blobarray_reset(xfer.aToken, xfer.nToken);
    blob_reset(&xfer.line);
  }
  if( fForkSeen ){
    @ message *****\s\sWARNING:\sa\sfork\shas\soccurred\s\s*****
  }
  if( isPush ){
    if( rc==TH_OK ){
      rc = xfer_run_script(zScript, zUuidList, 1);
      if( rc==TH_ERROR ){
        cgi_reset_content();
        @ error push\sscript\sfailed:\s%F(g.zErrMsg)
        nErr++;

  Xfer xfer;              /* Transfer data */
  int pctDone;            /* Percentage done with a message */
  int lastPctDone = -1;   /* Last displayed pctDone */
  double rArrivalTime;    /* Time at which a message arrived */
  const char *zSCode = db_get("server-code", "x");
  const char *zPCode = db_get("project-code", 0);
  int nErr = 0;           /* Number of errors */
  int fForkSeen = 0;      /* True if a fork was seen during pull */
  int nRoundtrip= 0;      /* Number of HTTP requests */
  int nArtifactSent = 0;  /* Total artifacts sent */
  int nArtifactRcvd = 0;  /* Total artifacts received */
  const char *zOpType = 0;/* Push, Pull, Sync, Clone */
  double rSkew = 0.0;     /* Maximum time skew */

  if( db_get_boolean("dont-push", 0) ) syncFlags &= ~SYNC_PUSH;
  if( (syncFlags & (SYNC_PUSH|SYNC_PULL|SYNC_CLONE))==0
     && configRcvMask==0 && configSendMask==0 ) return 0;

  transport_stats(0, 0, 1);
  socket_global_init();
  memset(&xfer, 0, sizeof(xfer));
  xfer.pIn = &recv;
  xfer.pOut = &send;
  xfer.mxSend = db_get_int("max-upload", 250000);
  xfer.maxTime = -1;

  if( syncFlags & SYNC_PRIVATE ){
    g.perm.Private = 1;
    xfer.syncPrivate = 1;
  }

  blobarray_zero(xfer.aToken, count(xfer.aToken));
  blob_zero(&send);

          if( rDiff*24.0*3600.0 >= -(blob_size(&recv)/5000.0 + 20) ) rDiff = 0.0;
          if( fossil_fabs(rDiff)>fossil_fabs(rSkew) ) rSkew = rDiff;
        }
        nCardRcvd++;
        continue;
      }
      xfer.nToken = blob_tokenize(&xfer.line, xfer.aToken, count(xfer.aToken));
      xfer.fHasFork = 0;
      nCardRcvd++;
      if( (syncFlags & SYNC_VERBOSE)!=0 && recv.nUsed>0 ){
        pctDone = (recv.iCursor*100)/recv.nUsed;
        if( pctDone!=lastPctDone ){
          fossil_print("\rprocessed: %d%%         ", pctDone);
          lastPctDone = pctDone;
          fflush(stdout);
        }
      }

      /*   file UUID SIZE \n CONTENT
      **   file UUID DELTASRC SIZE \n CONTENT
      **
      ** Receive a file transmitted from the server.
      */
      if( blob_eq(&xfer.aToken[0],"file") ){
        xfer_accept_file(&xfer, (syncFlags & SYNC_CLONE)!=0, 0, 0);
        if( (syncFlags & SYNC_PULL) && xfer.fHasFork ){
          fForkSeen = 1;
        }
        nArtifactRcvd++;
      }else

      /*   cfile UUID USIZE CSIZE \n CONTENT
      **   cfile UUID DELTASRC USIZE CSIZE \n CONTENT
      **
      ** Receive a compressed file transmitted from the server.
      */
      if( blob_eq(&xfer.aToken[0],"cfile") ){
        xfer_accept_compressed_file(&xfer, (syncFlags & SYNC_CLONE)!=0, 0, 0);
        if( (syncFlags & SYNC_PULL) && xfer.fHasFork ){
          fForkSeen = 1;
        }
        nArtifactRcvd++;
      }else

      /*   gimme UUID
      **
      ** Server is requesting a file.  If the file is a manifest, assume
      ** that the server will also want to know all of the content files

      manifest_crosslink_end(MC_PERMIT_HOOKS);
    }else{
      manifest_crosslink_end(MC_PERMIT_HOOKS);
      content_enable_dephantomize(1);
    }
    db_end_transaction(0);
  };
  if( fForkSeen ){
    fossil_warning("***** WARNING: a fork has occurred *****");
  }
  transport_stats(&nSent, &nRcvd, 1);
  if( (rSkew*24.0*3600.0) > 10.0 ){
     fossil_warning("*** time skew *** server is fast by %s",
                    db_timespan_name(rSkew));
     g.clockSkewSeen = 1;
  }else if( rSkew*24.0*3600.0 < -10.0 ){
     fossil_warning("*** time skew *** server is slow by %s",

  transport_global_shutdown(&g.url);
  if( nErr && go==2 ){
    db_multi_exec("DROP TABLE onremote");
    manifest_crosslink_end(MC_PERMIT_HOOKS);
    content_enable_dephantomize(1);
    db_end_transaction(0);
  }



  return nErr;
}