Fossil

    }else if( fossil_strcmp(g.argv[2], "latest")==0 ){
      /* If VERSION is "latest", then use the same algorithm to find the
      ** target as if VERSION were omitted and the --latest flag is present.
      */
      latestFlag = 1;
    }else{
      tid = name_to_typed_rid(g.argv[2],"ci");
      if( tid==0 ){
        fossil_fatal("no such version: %s", g.argv[2]);
       if( tid==0 || !is_a_version(tid) ){
        fossil_fatal("no such check-in: %s", g.argv[2]);
      }else if( !is_a_version(tid) ){
        fossil_fatal("no such version: %s", g.argv[2]);
      }
    }
  }

  /* If no VERSION is specified on the command-line, then look for a
  ** descendent of the current version.  If there are multiple descendants,
  ** look for one from the same branch as the current version.  If there

    int i;                 /* Loop counter */
    const char *zSep;      /* Term separator */

    blob_zero(&sql);
    blob_append(&sql, "DELETE FROM fv WHERE ", -1);
    zSep = "";
    for(i=3; i<g.argc; i++){
      file_tree_name(g.argv[i], &treename, 1);
      file_tree_name(g.argv[i], &treename, 0, 1);
      if( file_wd_isdir(g.argv[i])==1 ){
        if( blob_size(&treename) != 1 || blob_str(&treename)[0] != '.' ){
          blob_append_sql(&sql, "%sfn NOT GLOB '%q/*' ",
                         zSep /*safe-for-%s*/, blob_str(&treename));
        }else{
          blob_reset(&sql);
          break;

      /* File added in the target. */
      if( file_wd_isfile_or_link(zFullPath) ){
        fossil_print("ADD %s - overwrites an unmanaged file\n", zName);
        nOverwrite++;
      }else{
        fossil_print("ADD %s\n", zName);
      }
      undo_save(zName);
      if( !dryRunFlag && !internalUpdate ) undo_save(zName);
      if( !dryRunFlag ) vfile_to_disk(0, idt, 0, 0);
    }else if( idt>0 && idv>0 && ridt!=ridv && (chnged==0 || deleted) ){
      /* The file is unedited.  Change it to the target version */
      undo_save(zName);
      if( deleted ){
        fossil_print("UPDATE %s - change to unmanaged file\n", zName);
      }else{
        fossil_print("UPDATE %s\n", zName);
      }
      if( !dryRunFlag && !internalUpdate ) undo_save(zName);
      if( !dryRunFlag ) vfile_to_disk(0, idt, 0, 0);
    }else if( idt>0 && idv>0 && !deleted && file_wd_size(zFullPath)<0 ){
      /* The file missing from the local check-out. Restore it to the
      ** version that appears in the target. */
      fossil_print("UPDATE %s\n", zName);
      undo_save(zName);
      if( !dryRunFlag && !internalUpdate ) undo_save(zName);
      if( !dryRunFlag ) vfile_to_disk(0, idt, 0, 0);
    }else if( idt==0 && idv>0 ){
      if( ridv==0 ){
        /* Added in current checkout.  Continue to hold the file as
        ** as an addition */
        db_multi_exec("UPDATE vfile SET vid=%d WHERE id=%d", tid, idv);
      }else if( chnged ){
        /* Edited locally but deleted from the target.  Do not track the
        ** file but keep the edited version around. */
        fossil_print("CONFLICT %s - edited locally but deleted by update\n",
                     zName);
        nConflict++;
      }else{
        fossil_print("REMOVE %s\n", zName);
        undo_save(zName);
        if( !dryRunFlag && !internalUpdate ) undo_save(zName);
        if( !dryRunFlag ) file_delete(zFullPath);
      }
    }else if( idt>0 && idv>0 && ridt!=ridv && chnged ){
      /* Merge the changes in the current tree into the target version */
      Blob r, t, v;
      int rc;
      if( nameChng ){
        fossil_print("MERGE %s -> %s\n", zName, zNewName);
      }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 = dryRunFlag ? MERGE_DRYRUN : 0;
        undo_save(zName);
        if( !dryRunFlag && !internalUpdate ) undo_save(zName);
        content_get(ridt, &t);
        content_get(ridv, &v);
        rc = merge_3way(&v, zFullPath, &t, &r, mergeFlags);
        if( rc>=0 ){
          if( !dryRunFlag ){
            blob_write_to_file(&r, zFullNewPath);
            file_wd_setexe(zFullNewPath, isexe);

        case -2:  zLabel = "backout merge";    break;
      }
      fossil_warning("uncommitted %s against %S.",
                     zLabel, db_column_text(&q, 0));
      nMerge++;
    }
    db_finalize(&q);
    leaf_ambiguity_warning(tid, tid);

    if( nConflict ){
      if( internalUpdate ){
        internalConflictCnt = nConflict;
        nConflict = 0;
      }else{
        fossil_warning("WARNING: %d merge conflicts", nConflict);

    if( !internalUpdate ) undo_finish();
    if( setmtimeFlag ) vfile_check_signature(tid, CKSIG_SETMTIME);
    db_end_transaction(0);
  }
}

/*
** Make sure empty directories are created
** Create empty directories specified by the empty-dirs setting.
*/
void ensure_empty_dirs_created(void){
  /* Make empty directories? */
  char *zEmptyDirs = db_get("empty-dirs", 0);
  if( zEmptyDirs!=0 ){
    char *bc;
    int i;
    Blob dirName;
    Blob dirsList;

    blob_zero(&dirsList);
    blob_init(&dirsList, zEmptyDirs, strlen(zEmptyDirs));
    zEmptyDirs = fossil_strdup(zEmptyDirs);
    for(i=0; zEmptyDirs[i]; i++){
    /* Replace commas by spaces */
    bc = blob_str(&dirsList);
    while( (*bc)!='\0' ){
      if( (*bc)==',' ) { *bc = ' '; }
      if( zEmptyDirs[i]==',' ) zEmptyDirs[i] = ' ';
      ++bc;
    }
    /* Make directories */
    blob_zero(&dirName);
    blob_init(&dirsList, zEmptyDirs, -1);
    while( blob_token(&dirsList, &dirName) ){
      const char *zDir = blob_str(&dirName);
      char *zDir = blob_str(&dirName);
      /* Make full pathname of the directory */
      Blob path;
      const char *zPath;

      blob_zero(&path);
      blob_appendf(&path, "%s/%s", g.zLocalRoot, zDir);
      char *zPath = mprintf("%s/%s", g.zLocalRoot, zDir);
      zPath = blob_str(&path);
      /* Handle various cases of existence of the directory */
      switch( file_wd_isdir(zPath) ){
        case 0: { /* doesn't exist */
          fossil_free(zPath);
          zPath = mprintf("%s/%s/x", g.zLocalRoot, zDir);
          if( file_mkdir(zPath, 0)!=0 ) {
          if( file_mkfolder(zPath, 0, 1)!=0 ) {
            fossil_warning("couldn't create directory %s as "
                           "required by empty-dirs setting", zDir);
          }
          break;
        }
        case 1: { /* exists, and is a directory */
          /* do nothing - required directory exists already */
          break;
        }
        case 2: { /* exists, but isn't a directory */
          fossil_warning("file %s found, but a directory is required "
                         "by empty-dirs setting", zDir);
        }
      }
      fossil_free(zPath);
      blob_reset(&path);
      blob_reset(&dirName);
    }
    blob_reset(&dirsList);
    fossil_free(zEmptyDirs);
  }
}


/*
** Get the contents of a file within the check-in "revision".  If
** revision==NULL then get the file content for the current checkout.
*/
int historical_version_of_file(
  const char *revision,    /* The check-in containing the file */
  const char *file,        /* Full treename of the file */
  Blob *content,           /* Put the content here */
  int *pIsLink,            /* Set to true if file is link. */
  int *pIsExe,             /* Set to true if file is executable */
  int *pIsBin,             /* Set to true if file is binary */
  int errCode              /* Error code if file not found.  Panic if 0. */
  int errCode              /* Error code if file not found.  Panic if <= 0. */
){
  Manifest *pManifest;
  ManifestFile *pFile;
  int rid=0;

  if( revision ){
    rid = name_to_typed_rid(revision,"ci");

  undo_begin();
  db_multi_exec("CREATE TEMP TABLE torevert(name UNIQUE);");

  if( g.argc>2 ){
    for(i=2; i<g.argc; i++){
      Blob fname;
      zFile = mprintf("%/", g.argv[i]);
      blob_zero(&fname);
      file_tree_name(zFile, &fname, 1);
      file_tree_name(zFile, &fname, 0, 1);
      db_multi_exec(
        "REPLACE INTO torevert VALUES(%B);"
        "INSERT OR IGNORE INTO torevert"
        " SELECT pathname"
        "   FROM vfile"
        "  WHERE origname=%B;",
        &fname, &fname

    zFile = db_column_text(&q, 0);
    zFull = mprintf("%/%/", g.zLocalRoot, zFile);
    errCode = historical_version_of_file(zRevision, zFile, &record,
                                         &isLink, &isExe, 0, 2);
    if( errCode==2 ){
      if( db_int(0, "SELECT rid FROM vfile WHERE pathname=%Q OR origname=%Q",
                 zFile, zFile)==0 ){
        fossil_print("UNMANAGE: %s\n", zFile);
        fossil_print("UNMANAGE %s\n", zFile);
      }else{
        undo_save(zFile);
        file_delete(zFull);
        fossil_print("DELETE: %s\n", zFile);
        fossil_print("DELETE   %s\n", zFile);
      }
      db_multi_exec(
        "UPDATE OR REPLACE vfile"
        "   SET pathname=origname, origname=NULL"
        " WHERE pathname=%Q AND origname!=pathname;"
        "DELETE FROM vfile WHERE pathname=%Q",
        zFile, zFile
      );
    }else{
      sqlite3_int64 mtime;
      undo_save(zFile);
      mayNeedDelete = file_wd_size(zFull)>=0;
      mayBeLink = file_wd_islink(0);
      create_symlink_or_file(mayNeedDelete, isLink, mayBeLink, &record, zFull);
      file_wd_setexe(zFull, isExe);
      fossil_print("REVERTED: %s\n", zFile);
      fossil_print("REVERT   %s\n", zFile);
      mtime = file_wd_mtime(zFull);
      db_multi_exec(
         "UPDATE vfile"
         "   SET mtime=%lld, chnged=0, deleted=0, isexe=%d, islink=%d,mrid=rid"
         " WHERE pathname=%Q OR origname=%Q",
         mtime, isExe, isLink, zFile, zFile
      );