oh-my-zsh/lib/history.zsh

## History wrapper
function omz_history {
  # Delete the history file if `-c' argument provided.
  # This won't affect the `history' command output until the next login.
  zparseopts -E c=clear l=list

  if [[ -n "$clear" ]]; then
    # if -c provided, clobber the history file
    echo -n >| "$HISTFILE"
    echo >&2 History file deleted. Reload the session to see its effects.
  elif [[ -n "$list" ]]; then
    # if -l provided, run as if calling `fc' directly
    builtin fc "$@"
  else
    # otherwise, call `fc -l 1` to show all available
    # history (and pass additional parameters)
    builtin fc "$@" -l 1
  fi
}

# Timestamp format
case $HIST_STAMPS in
  "mm/dd/yyyy") alias history='omz_history -f' ;;
  "dd.mm.yyyy") alias history='omz_history -E' ;;
  "yyyy-mm-dd") alias history='omz_history -i' ;;
  *) alias history='omz_history' ;;
esac

## History file configuration
[ -z "$HISTFILE" ] && HISTFILE="$HOME/.zsh_history"
HISTSIZE=50000
SAVEHIST=10000

## History command configuration
setopt extended_history       # record timestamp of command in HISTFILE
setopt hist_expire_dups_first # delete duplicates first when HISTFILE size exceeds HISTSIZE
setopt hist_ignore_dups       # ignore duplicated commands history list
setopt hist_ignore_space      # ignore commands that start with space
setopt hist_verify            # show command with history expansion to user before running it
setopt inc_append_history     # add commands to HISTFILE in order of execution
setopt share_history          # share command history data