From 2f397255c26a57c36102ece3883c3765870c0bf9 Mon Sep 17 00:00:00 2001 From: Matthew Wild Date: Sun, 22 Jan 2012 19:35:50 +0000 Subject: moduleapi: Add module:depends(), a way to safely depend upon another module at runtime --- core/moduleapi.lua | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/core/moduleapi.lua b/core/moduleapi.lua index 3a28ec62..44ae9a07 100644 --- a/core/moduleapi.lua +++ b/core/moduleapi.lua @@ -100,6 +100,35 @@ function api:require(lib) return f(); end +function api:depends(name) + if not self.dependencies then + self.dependencies = {}; + self:hook("module-reloaded", function (event) + if self.dependencies[event.module] then + self:log("info", "Auto-reloading due to reload of %s:%s", event.host, event.module); + modulemanager.reload(self.host, self.name); + return; + end + end); + self:hook("module-unloaded", function (event) + if self.dependencies[event.module] then + self:log("info", "Auto-unloading due to unload of %s:%s", event.host, event.module); + modulemanager.unload(self.host, self.name); + end + end); + end + local mod = modulemanager.get_module(self.host, name) or modulemanager.get_module("*", name); + if not mod then + local err; + mod, err = modulemanager.load(self.host, name); + if not mod then + return error(("Unable to load required module, mod_%s: %s"):format(name, ((err or "unknown error"):gsub("%-", " ")) )); + end + end + self.dependencies[name] = true; + return mod; +end + function api:get_option(name, default_value) local value = config.get(self.host, self.name, name); if value == nil then -- cgit v1.2.3