name: Prepare changes for deployment.

on:
  push:
    branches:
      - 'main'

jobs:
  prepare:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3
        with:
          token: ${{ secrets.SECRET }}
  
      - uses: actions/setup-node@v3
        with:
          node-version: '16'

      - name: Install dependencies.
        run: npm i -g terser csso-cli html-minifier

      - name: "Copying changes over to build."
        run: git checkout -b build

      - name: Minify files.
        run: |
          for i in `find . -name "*.js" -type f`; do terser $i --compress -o $i; done
          for i in `find . -name "*.css" -type f`; do csso $i -o $i; done
          for i in `find . -name "*.html" -type f`; do html-minifier --remove-comments --collapse-whitespace $i -o $i; done
      
      - name: "Commiting changes."
        run: |
          git config user.email "noreply@github.com"
          git config user.name "github-actions"
          git commit -am "Preparing changes for deployment."
  
      - name: "Pushing changes."
        run: git push -f --set-upstream origin build