Fossil

    blob_append_sql(&sql, " AND event.mtime>=julianday('%q')", zA);
    url_add_parameter(&url, "a", zA);
  }
  if( (zB = P("b"))!=0 ){
    blob_append_sql(&sql, " AND event.mtime<=julianday('%q')", zB);
    url_add_parameter(&url, "b", zB);
  }
  /* We only want each version of a file to appear on the graph once,
  ** at its earliest appearance.  All the other times that it gets merged
  ** into this or that branch can be ignored.  An exception is for when
  ** files are deleted (when they have mlink.fid==0).  If the same file
  ** is deleted in multiple places, we want to show each deletion, so
  ** use a "fake fid" which is derived from the parent-fid for grouping.
  ** The same fake-fid must be used on the graph.
  */
  blob_append_sql(&sql,
    " GROUP BY"
    "   CASE WHEN mlink.fid>0 THEN mlink.fid ELSE mlink.pid+1000000000 END"
    " ORDER BY event.mtime DESC /*sort*/"
  );
  if( (n = atoi(PD("n","0")))>0 ){
    blob_append_sql(&sql, " LIMIT %d", n);
    url_add_parameter(&url, "n", P("n"));
  }
  db_prepare(&q, "%s", blob_sql_text(&sql));

    db_reset(&qparent);
    if( zBr==0 ) zBr = "trunk";
    if( uBg ){
      zBgClr = hash_color(zUser);
    }else if( brBg || zBgClr==0 || zBgClr[0]==0 ){
      zBgClr = strcmp(zBr,"trunk")==0 ? "" : hash_color(zBr);
    }
    gidx = graph_add_row(pGraph, frid>0 ? frid : fpid+1000000000,
                         nParent, aParent, zBr, zBgClr,
                         zUuid, 0);
    if( strncmp(zDate, zPrevDate, 10) ){
      sqlite3_snprintf(sizeof(zPrevDate), zPrevDate, "%.10s", zDate);
      @ <tr><td>
      @   <div class="divider">%s(zPrevDate)</div>
      @ </td><td></td><td></td></tr>
    }