** to the root of the source tree of the repository. The FILE must
** be a part of CHECKIN, except when CHECKIN=="ckout" when FILE is read
** directly from disk and need not be a managed file.  For /uv, FILE
** can also be the hash of the unversioned file.
**
** The "ckout" CHECKIN is intended for development - to provide a mechanism
** for looking at what a file will look like using the /doc webpage after
** it gets checked in.  Some commands like "fossil ui", "fossil server",
** and "fossil http" accept an argument "--ckout-alias NAME" when allows
** NAME to be understood as an alias for "ckout".  On a site with many
** embedded hyperlinks to /doc/trunk/... one can run with "--ckout-alias trunk"
** to simulate what the pending changes will look like after they are
** checked in.  The NAME alias is stored in g.zCkoutAlias.
**
** The file extension is used to decide how to render the file.
**
** If FILE ends in "/" then the names "FILE/index.html", "FILE/index.wiki",
** and "FILE/index.md" are tried in that order.  If the binary was compiled
** with TH1 embedded documentation support and the "th1-docs" setting is
** enabled, the name "FILE/index.th1" is also tried.  If none of those are

        }else if( rid==2 ){
          zName = db_text(zName,
             "SELECT name FROM unversioned WHERE hash=%Q", zName);
          g.isConst = 1;
        }
        zDfltTitle = zName;
      }
    }else if( fossil_strcmp(zCheckin,"ckout")==0
           || fossil_strcmp(zCheckin,g.zCkoutAlias)==0
    ){
      /* Read from the local checkout */
      char *zFullpath;
      db_must_be_within_tree();
      zFullpath = mprintf("%s/%s", g.zLocalRoot, zName);
      if( file_isfile(zFullpath, RepoFILE)
       && blob_read_from_file(&filebody, zFullpath, RepoFILE)>0 ){
        rid = 1;  /* Fake RID just to get the loop to end */