Fossil

      zFullPath = mprintf("%s/%s", g.zLocalRoot, zName);
      content_get(ridp, &p);
      content_get(ridm, &m);
      if( isBinary ){
        rc = -1;
        blob_zero(&r);
      }else{
        unsigned mergeFlags = nochangeFlag ? MERGE_DRYRUN : 0;
        rc = merge_3way(&p, zFullPath, &m, &r, mergeFlags);
      }
      if( rc>=0 ){
        if( !nochangeFlag ){
          blob_write_to_file(&r, zFullPath);
          file_wd_setexe(zFullPath, isExe);
        }
        db_multi_exec("UPDATE vfile SET mtime=0 WHERE id=%d", idv);

    }
  }
  db_finalize(&q);


  /* Report on conflicts
  */

  if( nConflict ){
    fossil_warning("WARNING: %d merge conflicts", nConflict);
  }
  if( nOverwrite ){
    fossil_warning("WARNING: %d unmanaged files were overwritten",
                   nOverwrite);
  }
  if( nochangeFlag ){
    fossil_warning("REMINDER: this was a dry run -"
                   " no file were actually changed.");
  }

  /*
  ** Clean up the mid and pid VFILE entries.  Then commit the changes.
  */
  db_multi_exec("DELETE FROM vfile WHERE vid!=%d", vid);
  db_multi_exec("INSERT OR IGNORE INTO vmerge(id,merge) VALUES(%d,%d)",

      blob_append(&x, "%", 1);
      zInput++;
    }
  }
  return blob_str(&x);
}

#if INTERFACE
/*
** Flags to the 3-way merger
*/
#define MERGE_DRYRUN  0x0001
#endif


/*
** This routine is a wrapper around blob_merge() with the following
** enhancements:
**
**    (1) If the merge-command is defined, then use the external merging
**        program specified instead of the built-in blob-merge to do the

**        then write the pivot, original, and merge-in files to the
**        filesystem.
*/
int merge_3way(
  Blob *pPivot,       /* Common ancestor (older) */
  const char *zV1,    /* Name of file for version merging into (mine) */
  Blob *pV2,          /* Version merging from (yours) */
  Blob *pOut,         /* Output written here */
  unsigned mergeFlags /* Flags that control operation */
){
  Blob v1;            /* Content of zV1 */
  int rc;             /* Return code of subroutines and this routine */
  char *zPivot;       /* Name of the pivot file */
  char *zOrig;        /* Name of the original content file */
  char *zOther;       /* Name of the merge file */

  blob_read_from_file(&v1, zV1);
  rc = blob_merge(pPivot, &v1, pV2, pOut);
  if( rc!=0 && (mergeFlags & MERGE_DRYRUN)==0 ){
    zPivot = file_newname(zV1, "baseline", 1);
    blob_write_to_file(pPivot, zPivot);
    zOrig = file_newname(zV1, "original", 1);
    blob_write_to_file(&v1, zOrig);
    zOther = file_newname(zV1, "merge", 1);
    blob_write_to_file(pV2, zOther);
  }
  if( rc>0 && (mergeFlags & MERGE_DRYRUN)==0 ){
    const char *zGMerge;   /* Name of the gmerge command */

    zGMerge = db_get("gmerge-command", 0);
    if( zGMerge && zGMerge[0] ){
      char *zOut;     /* Temporary output file */
      char *zCmd;     /* Command to invoke */
      const char *azSubst[8];  /* Strings to be substituted */

        file_delete(zOther);
        file_delete(zOut);
      }
      fossil_free(zCmd);
      fossil_free(zOut);
    }
  }
  if( rc!=0 && (mergeFlags & MERGE_DRYRUN)==0 ){
    fossil_free(zPivot);
    fossil_free(zOrig);
    fossil_free(zOther);
  }
  blob_reset(&v1);
  return rc;
}

      }else{
        int rc;
        if( isLink || isNewLink ){
          rc = -1;
          blob_zero(&b); /* because we reset it later */
          fossil_print("***** Cannot merge symlink %s\n", zNew);
        }else{
          rc = merge_3way(&a, zOPath, &b, &out, 0);
          blob_write_to_file(&out, zNPath);
          blob_reset(&out);
          file_wd_setexe(zNPath, isExec);
        }
        if( rc ){
          fossil_print("CONFLICT %s\n", zNew);
          nConflict++;

/*
** Complete the undo process is one is currently in process.
*/
void undo_finish(void){
  if( undoActive ){
    if( undoNeedRollback ){
      fossil_print(" \"fossil undo\" is available to undo changes"
             " to the working checkout.\n");
    }
    undoActive = 0;
    undoNeedRollback = 0;
  }
}

      }else{
        fossil_print("MERGE %s\n", zName);
      }
      if( islinkv || islinkt /* || file_wd_islink(zFullPath) */ ){
        fossil_print("***** Cannot merge symlink %s\n", zNewName);
        nConflict++;        
      }else{
        unsigned mergeFlags = nochangeFlag ? MERGE_DRYRUN : 0;
        undo_save(zName);
        content_get(ridt, &t);
        content_get(ridv, &v);
        rc = merge_3way(&v, zFullPath, &t, &r, mergeFlags);
        if( rc>=0 ){
          if( !nochangeFlag ){
            blob_write_to_file(&r, zFullNewPath);
            file_wd_setexe(zFullNewPath, isexe);
          }
          if( rc>0 ){
            fossil_print("***** %d merge conflicts in %s\n", rc, zNewName);