Re: [Qemu-devel] [PATCH 2/7] monitor: Convert help|? to use command_completion.

[Luiz Capitulino <lcapitulino@redhat.com>]

On Sun, 27 Apr 2014 17:00:03 +0100
Hani Benhabiles <kroosec@gmail.com> wrote:

> Signed-off-by: Hani Benhabiles <hani@linux.com>
> ---
>  hmp-commands.hx |  1 +
>  hmp.h           |  1 +
>  monitor.c       | 24 +++++++++++++++++-------
>  3 files changed, 19 insertions(+), 7 deletions(-)
> 
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index b3f45d6..ba13997 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -15,6 +15,7 @@ ETEXI
>          .params     = "[cmd]",
>          .help       = "show the help",
>          .mhandler.cmd = do_help_cmd,
> +        .command_completion = help_completion,
>      },
>  
>  STEXI
> diff --git a/hmp.h b/hmp.h
> index 12e21e7..55f78fa 100644
> --- a/hmp.h
> +++ b/hmp.h
> @@ -98,5 +98,6 @@ void object_del_completion(ReadLineState *rs, int nb_args, const char *str);
>  void device_add_completion(ReadLineState *rs, int nb_args, const char *str);
>  void device_del_completion(ReadLineState *rs, int nb_args, const char *str);
>  void sendkey_completion(ReadLineState *rs, int nb_args, const char *str);
> +void help_completion(ReadLineState *rs, int nb_args, const char *str);
>  
>  #endif
> diff --git a/monitor.c b/monitor.c
> index 7edfcee..acbbaf8 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -4407,6 +4407,23 @@ void sendkey_completion(ReadLineState *rs, int nb_args, const char *str)
>      }
>  }
>  
> +void help_completion(ReadLineState *rs, int nb_args, const char *str)
> +{
> +    int i;
> +    size_t len;
> +
> +    if (nb_args != 2) {
> +        return;
> +    }
> +    len = strlen(str);
> +    readline_set_completion_index(rs, len);
> +    for (i = 0; mon_cmds[i].name; i++) {
> +        if (!strncmp(str, mon_cmds[i].name, len)) {
> +            readline_add_completion(rs, mon_cmds[i].name);
> +        }
> +    }
> +}
> +
>  static void monitor_find_completion_by_table(Monitor *mon,
>                                               const mon_cmd_t *cmd_table,
>                                               char **args,
> @@ -4473,13 +4490,6 @@ static void monitor_find_completion_by_table(Monitor *mon,
>              readline_set_completion_index(mon->rs, strlen(str));
>              bdrv_iterate(block_completion_it, &mbs);
>              break;
> -        case 's':
> -        case 'S':
> -            if (!strcmp(cmd->name, "help|?")) {
> -                monitor_find_completion_by_table(mon, cmd_table,
> -                                                 &args[1], nb_args - 1);
> -            }
> -            break;
>          default:
>              break;
>          }

This breaks auto-completion for:

(qemu) help info v

Which would auto-complete "vnc". IIRC, that's one of the reasons we have
monitor_find_completion_by_table().