Setup automatic release deployment

[jnsahaj]

The process of deploying a release on homebrew is the following

cargo build --release
cd target/release

# generate release binary
tar -czf lumen.tar.gz lumen

Upload the release binary under a new release on Github

# generate shasum to be used for homebrew
shasum -a 256 lumen.tar.gz 

Inside jnsahaj/homebrew-lumen

1. Update shasum
2. Update download URL for the new release
3. Update version
4. Push to main

After homebrew deployment, need to deploy new version to cargo

1. Update Cargo.toml version
2. Stage and commit Cargo.toml and Cargo.lock files
3. Run cargo publish

[jmattaa]

I've done something similar to my own project I'm using GitHub workflows to automate the changes to be done on the homebrew tap repo using this script:

name: Update Homebrew Tap

on:
  push:
    tags:
      - 'v*' 
  workflow_dispatch: # allow manual trigger

jobs:
  update-tap:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set release version from tag
        run: echo "RELEASE_VERSION=${GITHUB_REF##*/}" >> $GITHUB_ENV

      - name: Download release artifact
        run: wget https://github.com/jmattaa/laser/archive/${RELEASE_VERSION}.tar.gz -O laser-${RELEASE_VERSION}.tar.gz

      - name: Calculate SHA256 checksum
        id: sha256
        run: echo "SHA256=$(sha256sum laser-${RELEASE_VERSION}.tar.gz | awk '{print $1}')" >> $GITHUB_ENV

      - name: Clone the Homebrew Tap repository
        run: |
          git clone https://github.com/jmattaa/homebrew-laser.git
          cd homebrew-laser
          git checkout main

      - name: Update laser.rb formula
        run: |
          cd homebrew-laser
          sed -i.bak "s|^  url .*|  url \"https://github.com/jmattaa/laser/archive/${RELEASE_VERSION}.tar.gz\"|" laser.rb
          sed -i.bak "s|^  sha256 .*|  sha256 \"${SHA256}\"|" laser.rb
          sed -i.bak "s|^  version .*|  version \"${RELEASE_VERSION}\"|" laser.rb

      - name: Commit and push changes to the Homebrew Tap
        run: |
          cd homebrew-laser
        
          git config --local user.name "github-actions[bot]"
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git remote set-url origin https://x-access-token:${{ secrets.PAT }}@github.com/jmattaa/homebrew-laser.git

          git add laser.rb
          git commit -m "chore: update laser.rb for ${RELEASE_VERSION}"
          git push origin main

[jnsahaj]

This is fantastic!
I will probably add this before the next release, and hook up the before/after steps