[SR-Users] new features: extended cfg preprocessor directives

Hello, just to let you know about some new features related to config preprocessing. 3.0 added config preprocessor directives such as 'include_file' and 'define'. But the define could be used only to control which parts of config file are active. Several days ago I committed the code to allow you 'define' values for IDs, like: #!define MYINT 123 #!define MYSTR "xyz" The defined IDs are replaced at startup, during config parsing, e.g.,: $var(x) = 100 + MYINT; - is read as: $var(x) = 100 + 123; Moreover, you can have multi-line defined IDs: #!define IDLOOP $var(i) = 0; \ while($var(i)<5) { \ xlog("++++ $var(i)\n"); \ $var(i) = $var(i) + 1; \ } - then in routing block route { ... IDLOOP ... } A completely new thing is the substitution preprocessor directive: #!subst "/regexp/subst/" Defined IDs are not replaced within string values (because a cfg IDs is a standalone alphanumeric token, not enclosed in single or double quotes), so if you need to change something inside a string within config file, then use substitution. For example, if you want to replace the password in all db_url module parameters: #!subst "/DBPASSWD/xyz/" modparam("acc", "db_url", "mysql://user:DBPASSWD@localhost/db") modparam("auth_db", "db_url", "mysql://user:DBPASSWD@localhost/db") The value of a 'subst' directive can be any valid perl-like substitution expression, you can use wildcards, group tokens, backreferences, .... Hope this will make your cfg scripting easier. Testing and feedback is appreciated. Cheers, Daniel -- Daniel-Constantin Mierla * http://www.asipto.com/ * http://twitter.com/miconda * http://www.linkedin.com/in/danielconstantinmierla