Allow users to pass in Xcode build settings as env variables to "flutter build ios-framework" FLUTTER_XCODE_

[jmagman]

This was done for all other commands via env variables with the FLUTTER_XCODE_ prefix (like FLUTTER_XCODE_CODE_SIGN_STYLE) with #43553 but was missed when creating build ios-framework command.

Example that should work, but doesn't:

$ FLUTTER_XCODE_IPHONEOS_DEPLOYMENT_TARGET="9.0" flutter build ios-framework --output=.`

[jmagman]

It does already pass the environment variables to invocations of xcodebuild EXCEPT when building plugins.

[AntonKukoba1]

it kinda works. But you can't pass the arguments which start with minus. I.e. you can pass -derivedDataPath via FLUTTER_XCODE. Because FLUTTER_XCODE_-derivedDataPath variable cannot be created.

[jmagman]

it kinda works. But you can't pass the arguments which start with minus. I.e. you can pass -derivedDataPath via FLUTTER_XCODE. Because FLUTTER_XCODE_-derivedDataPath variable cannot be created.

You can probably play with build settings like SYMROOT and MODULE_CACHE_DIR to get the behavior you want.
https://help.apple.com/xcode/mac/11.4/#/itcaec37c2a6

[AntonKukoba1]

it kinda works. But you can't pass the arguments which start with minus. I.e. you can pass -derivedDataPath via FLUTTER_XCODE. Because FLUTTER_XCODE_-derivedDataPath variable cannot be created.

You can probably play with build settings like SYMROOT and MODULE_CACHE_DIR to get the behavior you want.
https://help.apple.com/xcode/mac/11.4/#/itcaec37c2a6

Wouldn't it be simplier to have one environment variable (for example FLUTTER_XCODE) which will contain the string, which is just concatenated to the command line? So that any sophisticated combination of compilation flags could be added.

[bhavyalatha26]

Hi @jmagman,

Is FLUTTER_XCODE prefix support available on stable channel ?

[jmagman]

@bhavyalatha26 FLUTTER_XCODE_* (like FLUTTER_XCODE_ARCHS) #43553 for flutter build ios and flutter run is in v1.10.15, so yes, stable. This issue is tracking that that mechanism doesn't work for flutter build ios-framework on any channel.

FLUTTER_XCODE=<arbitrary injection of variables> as @AntonKukoba1 suggested isn't implemented anywhere.

[bhavyalatha26]

Thanks for the info @jmagman.

I just need one more info as of how to pass these variables.

For instance I added google maps package to my app and I am trying to pass the google maps key as XCODE env var to the AppDelegat.swift class as below

import UIKit
import Flutter
import Firebase
import GoogleMaps
import Foundation

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    FirebaseApp.configure()
    let mapsKey = ProcessInfo.processInfo.environment["FLUTTER_XCODE_GOOGLE_MAPS_IOS_KEY"] ?? "no_key"
    GMSServices.provideAPIKey(mapsKey)
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

Flutter : stable 1.17.5
XCode : 11.5

I tried it in below 3 ways. But none of them worked.

1.

export FLUTTER_XCODE_GOOGLE_MAPS_IOS_KEY=<my-key>
flutter run

2.

FLUTTER_XCODE_GOOGLE_MAPS_IOS_KEY=<my-key> flutter run

3.

flutter run --dart-define=FLUTTER_XCODE_GOOGLE_MAPS_IOS_KEY=<my-key>

Can you help me the right way of doing this

[jmagman]

@bhavyalatha26 FLUTTER_XCODE_ isn't for setting environment variables, it's a build setting that gets passed to xcodebuild. Can you file a new issue requesting improved documentation, or ask on SO? This GitHub issue is tracking a specific bug related to the flutter build ios-framework command

[bhavyalatha26]

Ok thank you @jmagman