|:command-bar| to true (but not |:command-buffer|, use
                     |nvim_buf_create_user_command()| instead).
                   • "complete" |:command-complete| also accepts a Lua
                     function which works like
                     |:command-completion-customlist|.
                   • Other parameters:
                     • desc: (string) Used for listing the command when a Lua
                       function is used for {command}.
                     • force: (boolean, default true) Override any previous
                       definition.
                     • preview: (function) Preview callback for 'inccommand'
                       |:command-preview|

nvim_del_user_command({name})                        *nvim_del_user_command()*
    Delete a user-defined command.

    Attributes: ~
        Since: 0.7.0

    Parameters: ~
      • {name}  Name of the command to delete.

nvim_get_commands({opts})                                *nvim_get_commands()*
    Gets a map of global (non-buffer-local) Ex commands.

    Currently only |user-commands| are supported, not builtin Ex commands.

    Attributes: ~
        Since: 0.3.0

    Parameters: ~
      • {opts}  Optional parameters. Currently only supports {"builtin":false}

    Return: ~
        Map of maps describing commands.

    See also: ~
      • |nvim_get_all_options_info()|

nvim_parse_cmd({str}, {opts})                               *nvim_parse_cmd()*
    Parse command line.

    Doesn't check the validity of command arguments.

    Attributes: ~
        |api-fast|
        Since: 0.8.0

    Parameters: ~
      • {str}   Command line string to parse. Cannot contain "\n".
      • {opts}  Optional parameters. Reserved for future use.

    Return: ~
        Dict containing command information, with these keys:
        • cmd: (string) Command name.
        • range: (array) (optional) Command range (<line1> <line2>). Omitted
          if command doesn't accept a range. Otherwise, has no elements if no
          range was specified, one element if only a single range item was
          specified, or two elements if both range items were specified.
        • count: (number) (optional) Command <count>. Omitted if command
          cannot take a count.
        • reg: (string) (optional) Command <register>. Omitted if command
          cannot take a register.
        • bang: (boolean) Whether command contains a <bang> (!) modifier.
        • args: (array) Command arguments.
        • addr: (string) Value of |:command-addr|. Uses short name or "line"
          for -addr=lines.
        • nargs: (string) Value of |:command-nargs|.
        • nextcmd: (string) Next command if there are multiple commands
          separated by a |:bar|. Empty if there isn't a next command.
        • magic: (dict) Which characters have special meaning in the command
          arguments.
          • file: (boolean) The command expands filenames. Which means
            characters such as "%", "#" and wildcards are expanded.
          • bar: (boolean) The "|" character is treated as a command separator
            and the double quote character (") is treated as the start of a
            comment.
        • mods: (dict) |:command-modifiers|.
          • filter: (dict) |:filter|.
            • pattern: (string) Filter pattern. Empty string if there is no
              filter.
            • force: (boolean) Whether filter is inverted or not.
          • silent: (boolean) |:silent|.
          • emsg_silent: (boolean) |:silent!|.
          • unsilent: (boolean) |:unsilent|.
          • sandbox: (boolean) |:sandbox|.
          • noautocmd: (boolean) |:noautocmd|.
          • browse: (boolean) |:browse|.
          • confirm: (boolean) |:confirm|.
          • hide: (boolean) |:hide|.
          • horizontal: (boolean) |:horizontal|.
          • keepalt: (boolean) |:keepalt|.
          • keepjumps: (boolean) |:keepjumps|.
          • keepmarks: (boolean) |:keepmarks|.
          • keeppatterns: