help: add --config to list all available config

diff --git a/builtin/help.c b/builtin/help.c
index 58e0a5507f10365b43eaa2698da2c8bba18b12ed..ccb206e1d4d8f12c32864bccc5971af41d63d051 100644 (file)
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -37,6 +37,7 @@ static const char *html_path;
 
 static int show_all = 0;
 static int show_guides = 0;
+static int show_config;
 static int verbose;
 static unsigned int colopts;
 static enum help_format help_format = HELP_FORMAT_NONE;
@@ -45,6 +46,7 @@ static struct option builtin_help_options[] = {
        OPT_BOOL('a', "all", &show_all, N_("print all available commands")),
        OPT_HIDDEN_BOOL(0, "exclude-guides", &exclude_guides, N_("exclude guides")),
        OPT_BOOL('g', "guides", &show_guides, N_("print list of useful guides")),
+       OPT_BOOL('c', "config", &show_config, N_("print all configuration variable names")),
        OPT_SET_INT('m', "man", &help_format, N_("show man page"), HELP_FORMAT_MAN),
        OPT_SET_INT('w', "web", &help_format, N_("show manual in web browser"),
                        HELP_FORMAT_WEB),
@@ -444,6 +446,13 @@ int cmd_help(int argc, const char **argv, const char *prefix)
                list_commands(colopts, &main_cmds, &other_cmds);
        }
 
+       if (show_config) {
+               setup_pager();
+               list_config_help();
+               printf("\n%s\n", _("'git help config' for more information"));
+               return 0;
+       }
+
        if (show_guides)
                list_common_guides_help();