I have a public Github project which uses Firebase, so it needs a GoogleService-Info.plist file. Since this file includes a bunch of API keys and such, I added the file to .gitignore
Today I set up Bitrise.io for CI purposes. Adding the project went just fine but now every time I trigger a build (or push to master), the build fails since the GoogleService-Info.plist is obviously missing from the repo.
Is there any kind of workaround to still hide the .plistfile from Github but expose it to Bitrise?
Use Secrets or Generic File Storage (https://devcenter.bitrise.io/tutorials/how-to-use-the-generic-file-storage/) in the Workflow editor.
There's just one limitation, that as your app is a public one on bitrise.io those secrets won't be available in Pull Request builds. But based on what you wrote that shouldn't be a problem, you don't want to expose it for anyone who can send a PR.
Note: if you'd store it as a Secret, then you can just write it into a file via a simple Script step: echo "$MY_PLIST_SECRET" > ./path/to/file.plist