+bool Config::update(const StringMap &opts)
+{
+ bool changed_now = false;
+ for(StringMap::const_iterator i=opts.begin(); i!=opts.end(); ++i)
+ {
+ if(set_option(i->first, i->second) && i->first!="profile")
+ changed_now = true;
+ }
+
+ if(changed_now)
+ {
+ mtime = Time::now();
+ changed = true;
+ }
+
+ return changed_now;
+}
+
+void Config::finish()
+{
+ for(OptionMap::iterator i=options.begin(); i!=options.end(); ++i)
+ i->second.value = package.expand_string(i->second.value);
+}
+
+void Config::save() const
+{
+ if(!changed)
+ return;
+
+ FS::Path fn = package.get_source()/".config";
+
+ package.get_builder().get_logger().log("files", format("Writing %s", fn));
+ IO::BufferedFile out(fn.str(), IO::M_WRITE);
+
+ for(OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
+ IO::print(out, "option \"%s\" \"%s\";\n", i->second.name, i->second.value);
+}
+
+bool Config::set_option(const string &opt, const string &val)