App_Environment_Variables
App Environment Variables
Setting environment variables on the project and reading from them via Xcode.
Xcode
Recent updates I believe from Xcode 12.5 gives an option for xcode-build-cli to be able to import the Environment variables of the host environment.
Which leads to good opportunities towards getting xcode work in tandem with various CI/CD providers to have different SWITCH | A/B Behavior on dev environments locally or remote servers running the build commands.
iOS Implementation
On iOS you can read the environment variable keys | values using this code snippet.
if let envV = ProcessInfo.processInfo.environment["IS_CI_SERVER"] {
print("The environment variable \(envV)")
}
Sarunw | setup iOS Environments develop | staging | production
Issues
While importing the environment variables, sometimes your host terminal environment variables aren't being imported properly. But if you edit the main scheme of the app and append the Environment variables to that scheme it would be able to properly import that value.
But what if you want set it via CLI on your host and then xcode test or xcode-build-test CLI should appropriately get that file. You would have to specify the value as in Xcode Scheme GUI.
"IS_CI_SERVER" = ${IS_CI_SERVER}
Links
https://medium.com/tauk-blog/passing-arguments-and-environment-variables-to-xctests-ebb60e55cece
https://stackoverflow.com/questions/27500940/how-to-let-the-app-know-if-its-running-unit-tests-in-a-pure-swift-project
https://blog.kulman.sk/reading-environment-variables-from-unit-tests/