Loading Firebase configuration

How to load Firebase configuration files into environment variables in a Flutter workflow editor pre-build script

Instead of committing the Firebase configuration files to your repository, you can upload them to Codemagic as environment variables and reference them in a custom script.

Save the contents of Firebase config files as environment variables, e.g. ANDROID_FIREBASE_SECRET and IOS_FIREBASE_SECRET in Codemagic UI (either in Application or Team variables) and select Secure.

1. Open your Codemagic app settings, and go to the Environment variables tab.

2. Enter the desired Variable name, e.g. ANDROID_FIREBASE_SECRET or IOS_FIREBASE_SECRET.

3. Copy and paste the config file content as Variable value.

4. Enter the variable group name, e.g. firebase_credentials. Click the button to create the group.

5. Make sure the Secure option is selected.

6. Click the Add button to add the variable.

7. Add the variable group to your codemagic.yaml file

     environment:
       groups:
         - firebase_credentials

8. Add the following pre-build script echoing your variables to load the Firebase configuration in Codemagic.

  scripts:
    - name: Load Firebase configuration
      script: | 
        #!/usr/bin/env sh
        set -e # exit on first failed command

        echo $ANDROID_FIREBASE_SECRET > $CM_BUILD_DIR/android/app/google-services.json
        echo $IOS_FIREBASE_SECRET > $CM_BUILD_DIR/ios/Runner/GoogleService-Info.plist

In case your project is in a nested folder structure, adjust the script accordingly:

  scripts:
    - name: Load Firebase configuration
      script: | 
        #!/usr/bin/env sh
        set -e # exit on first failed command

        PROJECT_ROOT=$CM_BUILD_DIR/myproject/path    # ADD YOUR PROJECT FOLDER PATH HERE

        echo $ANDROID_FIREBASE_SECRET > $PROJECT_ROOT/android/app/google-services.json
        echo $IOS_FIREBASE_SECRET > $PROJECT_ROOT/ios/Runner/GoogleService-Info.plist