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Display '-h' in --help output and accept '-h' and -?'

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'-h' is the preferred short version of '--help' now and displayed
in '--help' but for backwards compatibility '-?' is still supported.

If existing code uses '-h' for something else, GOptionContext will
not override it.

Fixes bug 556706.
This commit is contained in:
Christian Dywan
2009-06-28 02:45:50 +02:00
parent 09c3f6dd4b
commit 49172a71aa
1 changed files with 42 additions and 7 deletions
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49
glib/goption.c
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@@ -60,7 +60,7 @@
* testtreemodel [OPTION...] - test tree model performance
*
* Help Options:
* -?, --help Show help options
* -h, --help Show help options
* --help-all Show all help options
* --help-gtk Show GTK+ Options
*
@@ -378,7 +378,8 @@ void g_option_context_free (GOptionContext *context)
*
* Enables or disables automatic generation of <option>--help</option>
* output. By default, g_option_context_parse() recognizes
* <option>--help</option>, <option>-?</option>, <option>--help-all</option>
* <option>--help</option>, <option>-h</option>,
* <option>-?</option>, <option>--help-all</option>
* and <option>--help-</option><replaceable>groupname</replaceable> and creates
* suitable output to stdout.
*
@@ -671,6 +672,35 @@ group_list_has_visible_entires (GOptionContext *context,
return FALSE;
}
static gboolean
context_has_h_entry (GOptionContext *context)
{
gsize i;
GList *list;
if (context->main_group)
{
for (i = 0; i < context->main_group->n_entries; i++)
{
if (context->main_group->entries[i].short_name == 'h')
return TRUE;
}
}
for (list = context->groups; list != NULL; list = g_list_next (list))
{
GOptionGroup *group;
group = (GOptionGroup*)list->data;
for (i = 0; i < group->n_entries; i++)
{
if (group->entries[i].short_name == 'h')
return TRUE;
}
}
return FALSE;
}
/**
* g_option_context_get_help:
* @context: a #GOptionContext
@@ -702,6 +732,7 @@ g_option_context_get_help (GOptionContext *context,
gboolean seen[256];
const gchar *rest_description;
GString *string;
guchar token;
string = g_string_sized_new (1024);
@@ -823,9 +854,11 @@ g_option_context_get_help (GOptionContext *context,
if (!group)
{
list = context->groups;
token = context_has_h_entry (context) ? '?' : 'h';
g_string_append_printf (string, "%s\n -%c, --%-*s %s\n",
_("Help Options:"), '?', max_length - 4, "help",
_("Help Options:"), token, max_length - 4, "help",
_("Show help options"));
/* We only want --help-all when there are groups */
@@ -1810,15 +1843,17 @@ g_option_context_parse (GOptionContext *context,
{ /* short option */
gint new_i = i, arg_length;
gboolean *nulled_out = NULL;
gboolean has_h_entry = context_has_h_entry (context);
arg = (*argv)[i] + 1;
arg_length = strlen (arg);
nulled_out = g_newa (gboolean, arg_length);
memset (nulled_out, 0, arg_length * sizeof (gboolean));
for (j = 0; j < arg_length; j++)
{
if (context->help_enabled && arg[j] == '?')
print_help (context, TRUE, NULL);
parsed = FALSE;
if (context->help_enabled && (arg[j] == '?' ||
(arg[j] == 'h' && !has_h_entry)))
print_help (context, TRUE, NULL);
parsed = FALSE;
if (context->main_group &&
!parse_short_option (context, context->main_group,
i, &new_i, arg[j],