go_release.yaml

name: "Compile and Release on Tag Push"

on:
  push:
    tags:
      - '*'
  workflow_dispatch:

jobs:
  build-and-release-tag:
    if: github.repository == 'playtechnique/templ'
    runs-on: ubuntu-22.04
    env:
      OUTPUT_BINARY: templ
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

    steps:
      - name: "checkout"
        uses: actions/checkout@v3
        with:
          ref: ${{ env.GITHUB_REF }}
          fetch-depth: 0

      - name: 'Get Previous tag'
        id: previoustag
        uses: "WyriHaximus/github-action-get-previous-tag@v1"

      - name: "checkout again at tag version"
        uses: actions/checkout@v3
        with:
          ref: ${{ steps.previoustag.outputs.tag }}

      - name: show we understand previoustag
        run: |
          echo "<${{ steps.previoustag.outputs.tag }}>"

      - name: 'Check if release already exists'
        id: check_release
        run: |
          RELEASE_URL=$(curl -sH "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
          "https://api.github.com/repos/${{ github.repository }}/releases/tags/${{ steps.previoustag.outputs.tag }}" \
          | jq -r ".url" )
          
          if [[ "$RELEASE_URL" != "null" ]]; then
            echo "Release already exists. Skipping..."
            echo "exists=true" >> $GITHUB_OUTPUT
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi
      - name: "compile binary"
        if: steps.check_release.outputs.exists == 'false'
        run: |
          GOOS=linux go build -o ${{ env.OUTPUT_BINARY }}-linux
          GOOS=darwin GOARCH=amd64 go build -o ${{ env.OUTPUT_BINARY }}-mac-amd64
          GOOS=darwin GOARCH=arm64 go build -o ${{ env.OUTPUT_BINARY }}-mac-arm64
          GOOS=windows GOARCH=amd64 go build -o ${{ env.OUTPUT_BINARY }}-win-amd64

      - name: Release
        if: steps.check_release.outputs.exists == 'false'
        id: create_release
        uses: actions/create-release@v1

        with:
          tag_name: ${{ steps.previoustag.outputs.tag }}
          release_name: Release ${{ steps.previoustag.outputs.tag }}

      - name: Upload linux
        if: steps.check_release.outputs.exists == 'false'
        id: upload-linux-asset
        uses: actions/upload-release-asset@v1
        with:
          upload_url: ${{ steps.create_release.outputs.upload_url }}
          asset_path: ./${{ env.OUTPUT_BINARY }}-linux
          asset_name: ${{ env.OUTPUT_BINARY }}-linux
          asset_content_type: binary

      - name: Upload macos amd64
        if: steps.check_release.outputs.exists == 'false'
        id: upload-macos-asset-amd64
        uses: actions/upload-release-asset@v1
        with:
          upload_url: ${{ steps.create_release.outputs.upload_url }}
          asset_path: ./${{ env.OUTPUT_BINARY }}-mac-amd64
          asset_name: ${{ env.OUTPUT_BINARY }}-mac-amd64
          asset_content_type: binary

      - name: Upload macos arm64
        if: steps.check_release.outputs.exists == 'false'
        id: upload-macos-asset-arm64
        uses: actions/upload-release-asset@v1
        with:
          upload_url: ${{ steps.create_release.outputs.upload_url }}
          asset_path: ./${{ env.OUTPUT_BINARY }}-mac-arm64
          asset_name: ${{ env.OUTPUT_BINARY }}-mac-arm64
          asset_content_type: binary

      - name: Upload windows arm64
        if: steps.check_release.outputs.exists == 'false'
        id: upload-windows-asset-arm64
        uses: actions/upload-release-asset@v1
        with:
          upload_url: ${{ steps.create_release.outputs.upload_url }}
          asset_path: ./${{ env.OUTPUT_BINARY }}-win-amd64
          asset_name: ${{ env.OUTPUT_BINARY }}-win-amd64
          asset_content_type: binary
    outputs:
      version_tag: ${{ steps.previoustag.outputs.tag }}

  release-homebrew:
    runs-on: ubuntu-22.04
    needs: build-and-release-tag
    env:
      SOURCE_CODE_URL: https://github.com/${{ github.repository }}/archive/refs/tags/${{ needs.build-and-release-tag.outputs.version_tag }}.tar.gz

    steps:
      - name: 'Get source code artifact and binary for this version'
        run: |
          mkdir templ-downloads
          cd templ-downloads
          curl -LO ${{ env.SOURCE_CODE_URL }}

      - name: 'Generate sha256 sum'
        id: generate-sha256
        run: |
          SHA256=$(shasum -a 256 "templ-downloads/templ-${{ needs.build-and-release-tag.outputs.version_tag }}.tar.gz" | awk '{print $1}')
          echo "templ sha256 is ${SHA256}"
          echo "sha256=$SHA256" >> $GITHUB_OUTPUT

      - name: 'Download homebrew-templ'
        uses: actions/checkout@v3
        with:
          repository: 'PlayTechnique/homebrew-templ'
          ssh-key: '${{ secrets.HOMEBREWTEMPLSSHKEY }}'

      - name: 'show current file system layout'
        run: |
          ls -ltr

      - name: 'Prepare a template file'
        run: |
          export SHA_VALUE=${{ steps.generate-sha256.outputs.sha256 }}
          export URL_VALUE=${{ env.SOURCE_CODE_URL }}
          echo "SHA VALUE: ${SHA_VALUE}"
          echo "URL VALUE: ${URL_VALUE}"
          sed -i "s|sha256.*|sha256: \"$SHA_VALUE\"|" Formula/templ.rb
          sed -i "s|url.*|url: \"$URL_VALUE\"|" Formula/templ.rb


      - name: "Add new repo file"
        run: |
          git config --global user.email "github-bot@playtechnique.io"
          git config --global user.name "Github Bot"
          git add Formula/templ.rb
          git commit -m "Auto-Updater from templ: updating for ${{ needs.build-and-release-tag.outputs.version_tag }}"
          git push