push-formula-version.yaml

name: Brew push version-specific formula

on: [push]

jobs:
  push_homebrew_version:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    
    - name: Check for version update and grab variables
      if: contains(github.event.head_commit.message, 'https://github.com/mislav/bump-homebrew-formula-action')
      run: echo "FOUND_VERSION=true" >> $GITHUB_ENV
      
    - name: Grab formula name and version
      if: ${{ env.FOUND_VERSION == 'true' }}
      uses: jungwinter/split@v2
      id: split
      with:
        msg: ${{ github.event.head_commit.message }}
        
    - name: Make version string modifiable
      if: ${{ env.FOUND_VERSION == 'true' }}
      uses: ASzc/change-string-case-action@v2
      id: formula
      with:
        string: ${{ steps.split.outputs._1 }}
        
    - name: Remove dots from version number
      if: ${{ env.FOUND_VERSION == 'true' }}
      uses: jungwinter/split@v2
      id: ver
      with:
        msg: ${{ steps.split.outputs._3 }}
        separator: '.'
            
    - name: Create version-specific .rb from the latest commit
      if: ${{ env.FOUND_VERSION == 'true'}}
      run: |
        cp "Formula/${{ steps.split.outputs._1 }}.rb" "Formula/${{ steps.split.outputs._1 }}@${{ steps.split.outputs._3 }}.rb"
        
    - name: Replace the new formula's header
      if: ${{ env.FOUND_VERSION == 'true' }}
      uses: jacobtomlinson/gha-find-replace@v2
      with:
          find: "class ${{ steps.formula.outputs.capitalized }} < Formula"
          replace: "class ${{ steps.formula.outputs.capitalized }}AT${{ steps.ver.outputs._0 }}${{ steps.ver.outputs._1 }}${{ steps.ver.outputs._2 }} < Formula"
          include: "Formula/${{ steps.split.outputs._1 }}@${{ steps.split.outputs._3 }}.rb"
      
    - name: Commit the new modified file
      if: ${{ env.FOUND_VERSION == 'true'}}
      run: |
        git config --global user.name 'GitHub Action' 
        git config --global user.email 'action@github.com'
        git add -A
        git commit -m '[Automated commit] push version-specific brew formula for ${{ steps.split.outputs._1 }} version ${{ steps.split.outputs._3 }}'
        git push