Fossil

  undo_all_filesystem(0);
}

/*
** COMMAND: undo
** COMMAND: redo*
**
** Usage: %fossil undo ?OPTIONS? ?--? ?FILENAME...?
**    or: %fossil redo ?OPTIONS? ?--? ?FILENAME...?
**
** Undo the changes to the working checkout caused by the most recent
** of the following operations:
**
**    (1) fossil update             (5) fossil stash apply
**    (2) fossil merge              (6) fossil stash drop
**    (3) fossil revert             (7) fossil stash goto

** have done had the -n|--dry-run been omitted.
**
** A single level of undo/redo is supported.  The undo/redo stack
** is cleared by the commit and checkout commands.
**
** Options:
**   -n|--dry-run   do not make changes but show what would be done
**   --             Treat all following arguments as non-flags, even if
**                  they look like flags.
**
** See also: commit, status
*/
void undo_cmd(void){
  int isRedo = g.argv[1][0]=='r';
  int undo_available;
  int dryRunFlag = find_option("dry-run", "n", 0)!=0;
  const char *zCmd = isRedo ? "redo" : "undo";

  if( !dryRunFlag ){
    dryRunFlag = find_option("explain", 0, 0)!=0;
  }
  db_must_be_within_tree();
  verify_all_options2();
  db_begin_transaction();
  undo_available = db_lget_int("undo_available", 0);
  if( dryRunFlag ){
    if( undo_available==0 ){
      fossil_print("No undo or redo is available\n");
    }else{
      Stmt q;