[PATCH] commands: add varinfo command

[Sascha Hauer]

Hi Ahmad,

On Thu, Jan 16, 2025 at 03:07:40PM +0100, Ahmad Fatoum wrote:
> +
> +	dev = get_device_by_name(arg);
> +	if (!dev)
> +		return -ENODEV;
> +
> +	list_for_each_entry(param, &dev->parameters, list) {
> +		if (prefix && !strstarts(param->name, prefix))
> +			continue;
> +
> +		printf("%s: %s (type: %s)", param->name,
> +		       dev_get_param(dev, param->name), get_param_type(param));
> +		if (param->info)
> +			param->info(param);
> +		printf("\n");
> +		found = true;
> +	}

This command is a bit inconsistent between handling of regular
environment variables and device parameters.

# foobar=baz; varinfo foo

prints "foo: no matching variable found" whereas a

# varinfo mmc0.c

prints all mmc0 device parameters starting with 'c'. Would be nice if
both variable types are handled equally in one way or the other.

> +
> +	if (!found)
> +		goto not_found;
> +
> +	return 0;
> +not_found:
> +	printf("%s: no matching variable found\n", arg);
> +	return 1;
> +}
> +
> +BAREBOX_CMD_HELP_START(varinfo)
> +BAREBOX_CMD_HELP_TEXT("shows information about the variable in its argument")
> +BAREBOX_CMD_HELP_END
> +
> +BAREBOX_CMD_START(varinfo)
> +	.cmd		= do_varinfo,
> +	BAREBOX_CMD_DESC("show information about variables")
> +	BAREBOX_CMD_OPTS("VAR")
> +	BAREBOX_CMD_GROUP(CMD_GRP_INFO)
> +	BAREBOX_CMD_HELP(cmd_varinfo_help)
> +	BAREBOX_CMD_COMPLETE(env_param_noeval_complete)

"varinfo foo<TAB>" expands to "varinfo foobar=". The equal sign
shouldn't be there.

Sascha

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