ApolloDeveloperKit

Apollo Client Devtools bridge for Apollo iOS.

Overview

ApolloDeveloperKit is an iOS / macOS library which works as a bridge between Apollo iOS client and Apollo Client Developer tools.

This library adds an ability to watch the sent queries or mutations simultaneously, and also has the feature to request arbitrary operations from embedded GraphiQL console.

Screenshots

Prerequisites

• Xcode >= 11.2.1
• Apollo iOS >= 0.29.0, < 0.34.0
• Apollo Client Devtools

Installation

Install from CocoaPods

Add the following lines to your Podfile.

pod 'Apollo'
pod 'ApolloDeveloperKit', '~> 0.15.0', configurations: ['Debug']

Then run pod install.

Install from Carthage

Add the following lines to your Cartfile.

github "apollographql/apollo-ios"
github "manicmaniac/ApolloDeveloperKit"

Then run carthage update --platform iOS or carthage update --platform Mac.

Setup

First, in order to hook Apollo's cache and network layer, you need to use DebuggableNetworkTransport and DebuggableInMemoryNormalizedCache instead of usual ones.

let networkTransport = DebuggableNetworkTransport(networkTransport: HTTPNetworkTransport(url: url))
let cache = DebuggableInMemoryNormalizedCache()

Second, instantiate ApolloStore and ApolloClient with debuggable ingredients.

let store = ApolloStore(cache: cache)
let client = ApolloClient(networkTransport: networkTransport: store: store)

Finally, create ApolloDebugServer and run.

let debugServer = ApolloDebugServer(cache: cache, networkTransport: networkTransport)
self.debugServer = debugServer // Note: you need to retain debugServer's reference
debugServer.start(port: 8081)

Full example:

import Apollo
import ApolloDeveloperKit
import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    private var client: ApolloClient!
    private var debugServer: ApolloDebugServer?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        let url = URL(string: "https://example.com/graphql")!
        #if DEBUG
            let networkTransport = DebuggableNetworkTransport(networkTransport: HTTPNetworkTransport(url: url))
            let cache = DebuggableNormalizedCache(cache: InMemoryNormalizedCache())
            let store = ApolloStore(cache: cache)
            client = ApolloClient(networkTransport: networkTransport, store: store)
            debugServer = ApolloDebugServer(networkTransport: networkTransport, cache: cache)
            do {
                try debugServer.start(port: 8081)
            } catch let error {
                print(error)
            }
        #else
            client = ApolloClient(url: url)
        #endif
        return true
    }
}

Usage

If you don't have Apollo Client Developer Tools, install it before proceeding the following steps.

1. Launch your app on your device or simulator.
2. Open your browser and jump to the server's URL (in case your app runs the above example on a simulator, the URL would be http://localhost:8081).
   • You will see ApolloDebugServer is running! on your browser's tab.
   • If not, make sure the server runs and the specified URL is correct.
   • On a real device, the host would be other than localhost but you can check what it is with ApolloDebugServer.serverURL.
3. Open developer tools.
   • In Google Chrome
   • In Mozilla Firefox
4. Select Apollo tab.
   • You will see tabs like GraphiQL, Queries, Mutations on the left pane.
   • If not, reload the tab and wait until it's connected again.

Excluding ApolloDeveloperKit from Release (App Store) Builds

All instructions in this section are written based on Flipboard/FLEX's way.

Since ApolloDeveloperKit is originally designed for debug use only, it should not be exposed to end-users.

Fortunately, it is easy to exclude ApolloDeveloperKit framework from Release builds. The strategies differ depending on how you integrated it in your project, and are described below.

Please make sure your code is properly excluding ApolloDeveloperKit with #if DEBUG statements before starting these instructions. Otherwise it will be linked to your app unexpectedly. See Example/AppDelegate.swift to see how to do it.

For CocoaPods users

CocoaPods automatically excludes ApolloDeveloperKit from release builds if you only specify the Debug configuration for CocoaPods in your Podfile.

For Carthage users

1. Do NOT add ApolloDeveloperKit.framework to the embedded binaries of your target, as it would otherwise be included in all builds (therefore also in release ones).
2. Instead, add $(PROJECT_DIR)/Carthage/Build/iOS or $(PROJECT_DIR)/Carthage/Build/Mac to your target Framework Search Paths (this setting might already be present if you already included other frameworks with Carthage). This makes it possible to import the ApolloDeveloperKit framework from your source files. It does not harm if this setting is added for all configurations, but it should at least be added for the debug one.
3. Add a Run Script Phase to your target (inserting it alter the existing Link Binary with Libraries phase, for example), and which will embed ApolloDeveloperKit.framework in debug builds only:

if [ "$CONFIGURATION" = Debug ]; then
  /usr/local/bin/carthage copy-frameworks
fi

Finally, add $(SRCROOT)/Carthage/Build/iOS/ApolloDeveloperKit.framework or $(SRCROOT)/Carthage/Build/Mac/ApolloDeveloperKit.framework as input file of this script phase.

For users those who copy all the source files to the project manually

Now there's no easy way but you can exclude ApolloDeveloperKit by setting user defined build variable named EXCLUDED_SOURCE_FILE_NAMES. The value for the variable is a space-separated list of each filenames in ApolloDeveloperKit. Sorry for the inconvenience.

Console Redirection

ApolloDeveloperKit supports console redirection. When it is enabled, all logs written in stdout (usually written with print()) and stderr (written with NSLog()) are redirected to the web browser's console as well.

This feature is disabled by default so you may want to enable it explicitly.

debugServer = ApolloDebugServer(networkTransport: networkTransport, cache: cache)
debugServer.enableConsoleRedirection = true

Then open the console in your browser's developer tools. You will see logs in your iPhone or simulator.

In the browser console, logs written in stdout are colored in blue-green and stderr are orange so that you can distinguish them from ordinary browser logs.

Development

API Documentation

Auto-generated API documentation is here.

Run Example App

Since Example app is slightly modified version of apollographql/frontpage-ios-app, you need to start apollographql/frontpage-server before running the app.

1. Open Xcode and select ApolloDeveloperKitExample scheme.
2. Run and open http://localhost:8081 in your browser.

License

This software is distributed under the MIT license. See LICENSE for more detail.