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helper/command: handle empty "usage" with add_help_text/add_usage_text 

By using the command "add_help_text" to add a help text to a TCL
procedure it implicitly creates a new command_registration struct
that has field .usage set to NULL. This triggers a debug message
	BUG: command '%s' does not have the '.usage' field filled out

Use an empty string if usage field is NULL.

Plus, do not annoy the user with a LOG_INFO when the command
"add_usage_text" replaces an empty usage.

Change-Id: I4a72646e0fb704ba354f938d774055540cde3967
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5025
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Antonio Borneo 2019-03-30 11:19:47 +01:00 committed by Tomas Vanek
parent b61e454869
commit c19de41a0f
1 changed files with 3 additions and 2 deletions
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5
src/helper/command.c
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@ -1119,7 +1119,7 @@ int help_add_command(struct command_context *cmd_ctx, struct command *parent,
.name = cmd_name,
.mode = COMMAND_ANY,
.help = help_text,
.usage = usage,
.usage = usage ? : "",
};
nc = register_command(cmd_ctx, parent, &cr);
if (NULL == nc) {
@ -1144,8 +1144,9 @@ int help_add_command(struct command_context *cmd_ctx, struct command *parent,
if (usage) {
bool replaced = false;
if (nc->usage) {
if (*nc->usage)
replaced = true;
free(nc->usage);
replaced = true;
}
nc->usage = strdup(usage);
if (replaced)