GitHub Actions pipeline for deploying static files to GitHub Pages without 3rd party dependencies.

deploy.yaml

name: Deploy to GitHub pages

on:
  push:
    branches:
      - master

jobs:
  Deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Prepare dist dir
        run: mkdir dist && touch dist/hello.txt

      - name: Deploy to GitHub Pages
        if: success()
        run: |
          SRC="$(pwd)"
          mkdir /tmp/github-pages && cd /tmp/github-pages
          git init . && git checkout --orphan "${BRANCH}"
          cp -r "${SRC}/${DEPLOY_DIR}"/* .
          [[ ! -z "${FQDN}" ]] && echo "${FQDN}" > CNAME

          git config user.name "GitHub" && git config user.email "<[email protected]>"
          git add . && git status && git commit --message "${MESSAGE}"
          git push -f -q "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" "${BRANCH}"
        env:
          DEPLOY_DIR: dist
          FQDN: your.pretty.domain  # remove if you use default username.github.io/repo-name
          MESSAGE: Deploy to GitHub Pages
          BRANCH: gh-pages
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}