How to setting Swift Compiler Flags in CocoaPods?

Someday your boss ask you to have staging server and production server to make data be pure, so you will find out this code for your api:

var host: NSURL {
    #if DEBUG
        return NSURL(string: "https://www.google.com.vn")!
    #else
        return NSURL(string: "http://geek-is-stupid.github.io")!
    #endif
}

And you go to Build Settings and set the DEBUG symbol in Swift Compiler - Custom Flags section for the Other Swift Flags key via a -D DEBUG entry. See the following screenshot for an example:

That works, hummm but what happen if I move the host to a library and I use CocoaPods to manages dependencies, it won’t work any more.

So the way to let it jump :)

Open your Podfile and add this script to the bottom:

post_install do |installer|
    installer.pods_project.build_configurations.each do |config|
        if config.name == 'Debug'
            config.build_settings['OTHER_SWIFT_FLAGS'] ||= ['$(inherited)', '-D DEBUG']
        elsif config.name == 'Release'
            config.build_settings['OTHER_SWIFT_FLAGS'] ||= ['$(inherited)', '-D RELEASE']
        end
    end
end