degesch: show help for program options

1 files changed, 28 insertions, 3 deletions

diff --git a/degesch.c b/degesch.c
index ebc24c0..451d429 100644
--- a/degesch.c
+++ b/degesch.c
@@ -3886,9 +3886,9 @@ static struct command_handler
 g_command_handlers[] =
 {
 	{ "help",    handle_command_help,   "Show help",
-	  "[command]" },
+	  "[<command> | <option>]" },
 	{ "quit",    handle_command_quit,   "Quit the program",
-	  "[message]" },
+	  "[<message>]" },
 	{ "buffer",  handle_command_buffer, "Manage buffers",
 	  "list | clear | move | { close [<number> | <name>] } | <number>" },
 
@@ -3964,8 +3964,33 @@ handle_command_help (struct app_context *ctx, char *arguments)
 			return true;
 		}
 	}
+
+	struct config_item_ *item =
+		config_item_get (ctx->config.root, command, NULL);
+	if (item)
+	{
+		struct config_schema *schema = item->schema;
+		buffer_send_status (ctx, ctx->global_buffer, "%s", "");
+		buffer_send_status (ctx, ctx->global_buffer,
+			"Option \"%s\":", command);
+		buffer_send_status (ctx, ctx->global_buffer,
+			"  Description: %s", schema->comment);
+		buffer_send_status (ctx, ctx->global_buffer,
+			"  Type: %s", config_item_type_name (schema->type));
+		buffer_send_status (ctx, ctx->global_buffer,
+			"  Default: %s", schema->default_ ? schema->default_ : "null");
+
+		struct str tmp;
+		str_init (&tmp);
+		config_item_write (item, false, &tmp);
+		buffer_send_status (ctx, ctx->global_buffer,
+			"  Current value: %s", tmp.str);
+		str_free (&tmp);
+		return true;
+	}
+
 	buffer_send_error (ctx, ctx->global_buffer,
-		"%s: %s", "No such command", command);
+		"%s: %s", "No such command or option", command);
 	return true;
 }