Add a travis cron job for CocoaPod symbol collision testing

.travis.yml

@@ -112,6 +112,15 @@ jobs:
         # The travis_wait is necessary because the command takes more than 10 minutes.
         - travis_wait ./scripts/if_cron.sh ./scripts/pod_lib_lint.sh FirebaseFirestore.podspec --use-libraries --allow-warnings --no-subspecs
 
+    # Daily test for symbol collisions between Firebase and CocoaPods.
+    - stage: test
+      env:
+        - PROJECT=SymbolCollision PLATFORM=iOS METHOD=xcodebuild
+      before_install:
+        - ./scripts/if_cron.sh ./scripts/install_prereqs.sh
+      script:
+        - ./scripts/if_cron.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
+
     # Alternative platforms
 
     # Xcode 9

Releases/update-versions.py

@@ -158,11 +158,15 @@ def UpdatePodfiles(git_root, version):
   """
   firebase_podfile = os.path.join(git_root, 'Example', 'Podfile')
   firestore_podfile = os.path.join(git_root, 'Firestore', 'Example', 'Podfile')
+  collision_podfile = os.path.join(git_root, 'SymbolCollisionTest', 'Podfile')
 
   sed_command = ("sed -i.bak -e \"s#\\(pod "
                  "'Firebase/CoreOnly',[[:space:]]*'\\).*'#\\1{}'#\" {}")
   os.system(sed_command.format(version, firebase_podfile))
   os.system(sed_command.format(version, firestore_podfile))
+  sed_command = ("sed -i.bak -e \"s#\\(pod "
+                 "'Firebase',[[:space:]]*'\\).*'#\\1{}'#\" {}")
+  os.system(sed_command.format(version, collision_podfile))
 
 
 def UpdateTags(version_data, firebase_version, first=False):

SymbolCollisionTest/Podfile

@@ -0,0 +1,73 @@
+# Uncomment the next line to define a global platform for your project
+# platform :ios, '9.0'
+
+target 'SymbolCollisionTest' do
+  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
+  # use_frameworks!
+
+  # Firebase Pods
+    pod 'Firebase', '5.14.0'
+    pod 'FirebaseAnalytics'
+    pod 'FirebaseAuth'
+    pod 'FirebaseCore'
+    pod 'FirebaseCrash'
+    pod 'FirebaseDatabase'
+    pod 'FirebaseDynamicLinks'
+    pod 'FirebaseFirestore'
+    pod 'FirebaseFunctions'
+    pod 'FirebaseInAppMessaging'
+    pod 'FirebaseInstanceID'
+    pod 'FirebaseMessaging'
+    pod 'FirebaseMLCommon'
+    pod 'FirebaseMLModelInterpreter'
+    pod 'FirebaseMLVision'
+    pod 'FirebaseMLVisionBarcodeModel'
+    pod 'FirebaseMLVisionFaceModel'
+    pod 'FirebaseMLVisionLabelModel'
+    pod 'FirebaseMLVisionTextModel'
+    pod 'FirebasePerformance'
+    pod 'FirebaseRemoteConfig'
+    pod 'FirebaseStorage'
+#    pod 'FirebaseUI'. - requires use_frameworks!
+
+  # Other Google Pods
+#    pod 'Blockly' This is a Swift Pod and requires usage of use_frameworks!
+    pod 'Crashlytics'
+    pod 'DigitsMigrationHelper'
+    pod 'EarlGrey'
+    pod 'GeoFire'
+    pod 'google-cast-sdk'
+    pod 'Google-Mobile-Ads-SDK'
+    pod 'GoogleAnalytics'
+    pod 'GoogleAppIndexing'
+    pod 'GoogleAppUtilities'
+    pod 'GoogleAuthUtilities'
+    pod 'GoogleConversionTracking'
+    pod 'GoogleIDFASupport'
+    pod 'GoogleInterchangeUtilities'
+    pod 'GoogleMaps'
+    pod 'GoogleMobileVision'
+    pod 'GoogleNetworkingUtilities'
+    pod 'GoogleParsingUtilities'
+    pod 'GooglePlacePicker'
+    pod 'GooglePlaces'
+    pod 'GooglePlusUtilities'
+    pod 'GoogleSignIn'
+    pod 'GoogleSymbolUtilities'
+    pod 'GoogleTagManager'
+    pod 'GoogleToolboxForMac'
+    pod 'GoogleUtilities'
+    pod 'GTMAppAuth'
+#    pod 'GTMHTTPFetcher' - conflicts with GTMSessionFetcher
+    pod 'GTMSessionFetcher'
+    pod 'GVRSDK'
+    pod 'leveldb-library'
+#    pod 'MDFTextAccessibility' - conflicts with GVRSDK
+    pod 'nanopb'
+#    pod 'NearbyMessages' # - conflicts with google-cast-sdk
+    pod 'Protobuf'
+    pod 'TensorFlow-experimental'
+
+  # Non-Google Pods
+
+end

SymbolCollisionTest/README.md

@@ -0,0 +1,32 @@
+# Symbol Collision Tests
+
+## Introduction
+
+This directory provides a project that is used to test a set of CocoaPods for symbol
+collisions daily.  It's controlled by the cron functionality in
+[.travis.ml](../.travis.yml).
+
+## Run Locally
+
+* `git clone [email protected]:firebase/firebase-ios-sdk.git`
+* `cd firebase-ios-sdk/SymbolCollisionTest`
+* Optionally make any changes to the Podfile
+* `pod install`
+* `open SymbolCollisionTest.xcworkspace`
+* Build
+
+## Contributing
+
+If you'd like to add a CocoaPod to the tests, add it to the
+[Podfile](Podfile), test that it builds locally and then send a PR.
+
+## Future
+
+Currently the tests primarily test static libraries and static frameworks.
+`use_frameworks!` and
+[`use_module_headers!`](http://blog.cocoapods.org/CocoaPods-1.5.0/) can be
+added for better dynamic library and Swift pod testing.
+
+Currently, this is testing released CocoaPods. It could be changed to support
+pre-releases by changing the Podfile to point to source pods and/or setting up
+a public staging Specs repo and adding a `source` in the Podfile.