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man: enhance handling of option description

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Update the _print_man_option_desc() to also handle common parts
as the initial text without any specified section and also
add support for '#\n' to be able to revert to common part.
This commit is contained in:
Zdenek Kabelac 2024-11-21 22:47:11 +01:00
parent ca5d258376
commit efe5af819a
1 changed files with 32 additions and 47 deletions
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77
tools/man-generator.c
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@ -914,70 +914,55 @@ static void _print_man_usage_common_cmd(struct command *cmd)
*
* "text bar goes here"
* "another line of text."
*
* Supports also 'prefix' for all commands before the first '#cmdname'.
* "#\n" is restorting printing for all commands.
*/
static void _print_man_option_desc(const struct command_name *cname, int opt_enum)
{
const char *desc = opt_names[opt_enum].desc;
size_t clen = strlen(cname->name);
char buf[DESC_LINE];
int started_cname = 0;
int line_count = 0;
int bi = 0;
unsigned di;
int check_for_new_section = 1;
int print_section = 1; /* initial description without cmdname is printed */
unsigned bi = 0;
if (desc[0] != '#') {
printf("%s", desc);
return;
}
for (di = 0; desc[di]; di++) {
buf[bi++] = desc[di];
while (*desc) {
buf[bi++] = *desc;
if (bi == DESC_LINE) {
log_error("Parsing command defs: print_man_option_desc line too long.");
exit(EXIT_FAILURE);
}
if (buf[bi-1] != '\n')
continue;
if (*desc++ != '\n' && *desc)
continue; /* read until '\n' or end of description */
if (buf[0] != '#') {
if (started_cname) {
/* Line could be either new cmdname or a regular text description
* either for all commands or for the matching cmdname.
* Line starting with #cmdname starts a new 'text section'.
* Multiple command names can use the same text */
if (buf[0] == '#') {
if (check_for_new_section) {
check_for_new_section = 0;
print_section = 0;
}
bi -= 2;
if (!bi || /* empty cmd resets section to all commands */
((bi == clen) && !strncmp(buf + 1, cname->name, clen))) {
print_section = 1;
}
} else if (print_section) {
/* Printable text 'splits' individual 'cmdname' section */
check_for_new_section = 1;
if (bi) {
buf[bi] = 0;
printf("%s", buf);
line_count++;
}
}
memset(buf, 0, sizeof(buf));
bi = 0;
continue;
}
/* Line starting with #cmdname */
/*
* Must be starting a new command name.
* If no lines have been printed, multiple command names
* are using the same text. If lines have been printed,
* then the start of a new command name means the end
* of text for the current command name.
*/
if (line_count && started_cname)
return;
if (!strncmp(buf + 1, cname->name, strlen(cname->name))) {
/* The start of our command name. */
started_cname = 1;
memset(buf, 0, sizeof(buf));
bi = 0;
} else {
/* The start of another command name. */
memset(buf, 0, sizeof(buf));
bi = 0;
}
}
if (bi && started_cname)
printf("%s", buf);
}
/*