Firebase stage + Prod config

README

STEP 1.
Add a flag in the "Other Swift Flags" like -DENVConfigStaging to a debug target.
Now when you build this target you have a debug flag set, otherwise assume production.

STEP 2.
Add the staging and production GoogleService-Info.plist(s)

STEP 3.
Add a build phase script to look for the build flag and copy the appropriate GoogleService-Info.plist to the built .app before codesigning it


Doing this allows you to create a class like EnvConfig.swift to define env specific stuff

You can do the same thing with GCC preprocessor flags, etc.. if you don't swift

build phase script for firebase

CURRENT_DIR=`pwd -P`
SOURCE_DIR="$CURRENT_DIR/PROJECTNAME/"

if [[ $OTHER_SWIFT_FLAGS == *"-DENVConfigStaging"* ]]
then
cp "$SOURCE_DIR/GoogleService-Info.plist.staging" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app/GoogleService-Info.plist"
else
cp "$SOURCE_DIR/GoogleService-Info.plist.production" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app/GoogleService-Info.plist"
fi

EnvConfig.swift

import Foundation


@objc(EnvConfig)
class EnvConfig: NSObject {

    #if ENVConfigStaging
    class var isProduction:Bool {
        return false
    }
    #else
    class var isProduction:Bool {
    return true
    }
    #endif
    
}

Love this gist! FYI you can use ${UNLOCALIZED_RESOURCES_FOLDER_PATH} instead of ${PRODUCT_NAME}.app in the .sh

Thanks for this!
Couple tweaks that could help anyone else stumbling across this:

Why not use the dynamic project name here too:

SOURCE_DIR="$CURRENT_DIR/${PROJECT_NAME}/"

Standard Debug/Release configs:

if [ "${CONFIGURATION}" = "Debug" ]