Fossil

**         the tag value propages to all descendants of CHECK-IN
**
**     %fossil tag cancel ?--raw? TAGNAME CHECK-IN
**
**         Remove the tag TAGNAME from CHECK-IN, and also remove
**         the propagation of the tag to any descendants.
**
**     %fossil tag find ?--raw? ?--type TYPE? TAGNAME
**
**         List all objects that use TAGNAME.  TYPE can be "ci" for
**         checkins or "e" for events.
**
**     %fossil tag list ?--raw? ?CHECK-IN?
**
**         List all tags, or if CHECK-IN is supplied, list
**         all tags and their values for CHECK-IN.
**
** The option --raw allows the manipulation of all types of tags

    db_begin_transaction();
    tag_add_artifact(zPrefix, g.argv[3], g.argv[4], 0, 0, 0, 0);
    db_end_transaction(0);
  }else

  if( strncmp(g.argv[2],"find",n)==0 ){
    Stmt q;
    const char *zType = find_option("type","t",1);
    if( zType==0 || zType[0]==0 ) zType = "*";
    if( g.argc!=4 ){
      usage("find ?--raw? TAGNAME");
    }
    if( fRaw ){
      db_prepare(&q,
        "SELECT blob.uuid FROM tagxref, blob"
        " WHERE tagid=(SELECT tagid FROM tag WHERE tagname=%Q)"

      db_finalize(&q);
    }else{
      int tagid = db_int(0, "SELECT tagid FROM tag WHERE tagname='sym-%q'",
                         g.argv[3]);
      if( tagid>0 ){
        db_prepare(&q,
          "%s"
          "  AND event.type GLOB '%q'"
          "  AND blob.rid IN ("
                    " SELECT rid FROM tagxref"
                    "  WHERE tagtype>0 AND tagid=%d"
                    ")"
          " ORDER BY event.mtime DESC",
          timeline_query_for_tty(), zType, tagid
        );
        print_timeline(&q, 2000);
        db_finalize(&q);
      }
    }
  }else