e2e: auto-configure device/emulator names

so we don't have to hardcode devices/emulators in package.json

NOTE: this is somewhat hacky, there are dummy ones there or else detox
will complain. But the device name keys are only generated last second
before detox.init in e2e/init.js

e2e/init.js

@@ -1,25 +1,47 @@
-const detox = require('detox');
-const config = require('../package.json').detox;
-const adapter = require('detox/runners/jest/adapter');
-const specReporter = require('detox/runners/jest/specReporter');
+const detox = require('detox')
+const detoxConfig = require('../package.json').detox
+const adapter = require('detox/runners/jest/adapter')
+const specReporter = require('detox/runners/jest/specReporter')
+
+const ADB = require('detox/src/devices/android/ADB')
+const adb = new ADB()
 
 // Set the default timeout
-jest.setTimeout(120000);
-jasmine.getEnv().addReporter(adapter);
+jest.setTimeout(120000)
+jasmine.getEnv().addReporter(adapter)
 
 // This takes care of generating status logs on a per-spec basis. By default, jest only reports at file-level.
 // This is strictly optional.
-jasmine.getEnv().addReporter(specReporter);
+jasmine.getEnv().addReporter(specReporter)
 
 beforeAll(async () => {
-  await detox.init(config);
+  const configs = detoxConfig.configurations
+  const newConfigs = detoxConfig.configurations = {
+    'ios.sim.debug': configs['ios.sim.debug']
+  }
+
+  try {
+    const devices = await adb.devices()
+    devices.forEach(device => {
+      const key = 'android' + (device.type == 'emulator' ? '.emu' : '')
+      const releaseTypes = ['debug', 'release']
+      releaseTypes.forEach(releaseType => {
+        const configKey = `${key}.${releaseType}`
+        newConfigs[configKey] = configs[configKey]
+        newConfigs[configKey].name = device.name
+      })
+    })
+  } catch(err) {
+    console.error("Could not find android device/emulator", err)
+  }
+  await detox.init(detoxConfig)
 });
 
 beforeEach(async () => {
-  await adapter.beforeEach();
+  await adapter.beforeEach()
 });
 
 afterAll(async () => {
-  await adapter.afterAll();
-  await detox.cleanup();
+  await adapter.afterAll()
+  await detox.cleanup()
 });

package.json

@@ -91,26 +91,26 @@
         "build":
         "cd android && ./gradlew assembleDebug assembleAndroidTest -DtestBuildType=debug && cd ..",
         "type": "android.emulator",
-        "name": "Nexus_5X_API_24"
+        "name": "dynamic"
       },
       "android.emu.release": {
         "binaryPath": "android/app/build/outputs/apk/release/app-release.apk",
         "build": "cd android && ./gradlew assembleRelease assembleAndroidTest -DtestBuildType=release && cd ..",
         "type": "android.emulator",
-        "name": "Nexus_5X_API_26"
+        "name": "dynamic"
       },
       "android.debug": {
         "binaryPath": "android/app/build/outputs/apk/debug/app-debug.apk",
         "build":
         "cd android && ./gradlew assembleDebug assembleAndroidTest -DtestBuildType=debug && cd ..",
         "type": "android.attached",
-        "name": "PL2GARB832801755"
+        "name": "dynamic"
       },
       "android.release": {
         "binaryPath": "android/app/build/outputs/apk/release/app-release.apk",
         "build": "cd android && ./gradlew assembleRelease assembleAndroidTest -DtestBuildType=release && cd ..",
         "type": "android.attached",
-        "name": "PL2GARB832801755"
+        "name": "dynamic"
       }
     },
     "test-runner": "jest",