Code example for the article "Swift, Plist and Two Smoking Scripts" https://medium.com/rosberryapps/swift-plist-and-two-smoking-scripts-94bb54cbeded

swift-build-phase-scripts-1.swift

import Foundation

// Get project URL
guard let projectDirRawValue = getenv("PROJECT_DIR"),
    let projectDirectoryPath = String(utf8String: projectDirRawValue) else {
        exit(1)
}
let projectURL = URL(fileURLWithPath: projectDirectoryPath)
// Get Info.plist path
guard let productSettingsPathRawValue = getenv("PRODUCT_SETTINGS_PATH"),
    let productSettingsPath = String(utf8String: productSettingsPathRawValue) else {
        exit(1)
}