The following Github Action will successfully build and deploy your Hugo static-site and upload it to Google Firebase Hosting.

Pre-requisites

• You will need a Firebase Project. If you haven't already got one you can easily get one here: Firebase Console
• You will need a Firebase Token in-order for this to run.

You will need firebase tools installed on your local machine to obtain a firebase token. If you haven't got it installed then you can install it by running npm install -g firebase-tools.

• Log in to Firebase (setup on your local machine) using firebase login, which opens a browser where you can select your account. Use firebase logout in case you are already logged in but to the wrong account.
• In the root of your Hugo project, initialize the Firebase project with the firebase init command. From here:
  • Choose Hosting in the feature question
  • Choose the project you just set up
  • Accept the default for your database rules file
  • Accept the default for the publish directory, which is public
  • Choose “No” in the question if you are deploying a single-page app
• You can generate a deploy token using firebase login:ci
• Your Firebase token is sensitive information so it will need to be setup as a Github Secret.
• Once completed you are ready to setup your action.

Within your repo select the Actions tab. Create a new workflow and paste the following:

on: [push]
name: Deploy Hugo to Firebase
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v1
      with:
        submodules: true
    - uses: ryank90/action-hugo-firebase-deploy@master
      with:
        firebase-token: ${{ secrets.firebase_token }}
        hugo-params: -D // Optional. Any params for the `hugo` command. [Refer doc here](https://gohugo.io/commands/hugo/) 

Save and you are ready to push code to your repo and have it deployed.