xcodebuild - Set xcode "build setting" from terminal?

Question

Is there anyway that I can change a setting in xcode without opening xcode? I have an automated xcodebuild / xcrun process going on but I need to change 1 value:

Targets > Select your target > Build Settings > Code Signing Resource Rules Path add : $(SDKROOT)/ResourceRules.plist

I can't find any file where I might put this line...

Answer 1

What You can do is to run:

xcodebuild -target <target> -configuration <configuration> -showBuildSettings

This command shows all the settings that are filled for target and configuration passed. Find the name of the key that contains $(SDKROOT)/ResourceRules.plist (let call it THE_KEY) and then try:

xcodebuild -target <target> -configuration <configuration> THE_KEY=<new_value>

Don't guarantee that it will work.