[CocoaPods] Podfile post install hook hack - get rid of those noobish NSLogs in mediocre libs imported by cocoapods. Silences them in release builds and add class and line number info to target that sucker in debug builds

Podfile

post_install do | installer |
    prefix_header = installer.config.project_pods_root + 'Pods-prefix.pch'
    text = prefix_header.read + <<-EOS
#if DEBUG
    #define NSLog(fmt, ...) NSLog((@"[DEBUG] %s [Line %d] " fmt), __FUNCTION__, __LINE__, ##__VA_ARGS__)
#else
    #define NSLog(fmt, ...) (void)0
#endif
EOS
    prefix_header.open('w') { |file| file.write(text) }
end

Muhaha.