publish.yml

name: Publish

on:
  push:
    tags:
      # Bare semver tags, as produced by `mix publisho` (e.g. 0.4.0, 0.4.1-rc.1)
      - '[0-9]*'

permissions:
  contents: read

jobs:
  publish:
    name: Publish to Hex
    runs-on: ubuntu-24.04

    steps:
    - name: Checkout code
      uses: actions/checkout@v5

    - name: Set up Elixir
      uses: erlef/setup-beam@v1
      with:
        elixir-version: '1.19'
        otp-version: '28'

    - name: Install dependencies
      run: mix deps.get

    - name: Verify tag matches project version
      run: |
        version=$(grep -m1 -oE '@version "[^"]+"' mix.exs | cut -d'"' -f2)
        if [ "$version" != "$GITHUB_REF_NAME" ]; then
          echo "::error::Tag '$GITHUB_REF_NAME' does not match mix.exs @version '$version'"
          exit 1
        fi
        echo "Publishing version $version"

    - name: Run tests
      run: mix test

    - name: Publish to Hex
      run: mix hex.publish --yes
      env:
        HEX_API_KEY: ${{ secrets.HEX_API_KEY }}