deploy.yml

# Build and deploy txn2.com to GitHub Pages.
#
# REQUIRED ONE-TIME REPO SETUP:
#   Settings → Pages → Source: "GitHub Actions"
#
# Triggers:
#   - Push of a v* tag                     → live deploy at that tag
#   - GitHub Release published             → live deploy at the release tag
#   - Manual run (workflow_dispatch)       → live deploy with optional version override
#   - Pull request targeting master        → build-only smoke test (no deploy)
#
# Master pushes do NOT deploy on their own. Tag the commit to ship.

name: deploy

on:
  push:
    tags: ['v*']
  release:
    types: [published]
  pull_request:
    branches: [master]
  workflow_dispatch:
    inputs:
      version:
        description: 'Version stamp to display on the site (e.g. v9.0.2). Defaults to "dev".'
        required: false

permissions:
  contents: read
  pages: write
  id-token: write

concurrency:
  group: pages
  cancel-in-progress: false

env:
  HUGO_VERSION: 0.160.1

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Install Hugo
        run: |
          wget -O /tmp/hugo.deb "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb"
          sudo dpkg -i /tmp/hugo.deb

      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 0

      - name: Resolve release version
        id: ver
        run: |
          if [ -n "${{ inputs.version }}" ]; then
            VERSION="${{ inputs.version }}"
          elif [ "${{ github.event_name }}" = "release" ]; then
            VERSION="${{ github.event.release.tag_name }}"
          elif [ "${{ github.ref_type }}" = "tag" ]; then
            VERSION="${{ github.ref_name }}"
          elif [ "${{ github.event_name }}" = "pull_request" ]; then
            VERSION="pr-${{ github.event.pull_request.number }}"
          else
            VERSION="dev"
          fi
          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
          echo "Resolved version: ${VERSION}"

      - name: Setup Pages
        if: github.event_name != 'pull_request'
        id: pages
        uses: actions/configure-pages@v5

      - name: Build with Hugo
        env:
          HUGO_PARAMS_VERSION: ${{ steps.ver.outputs.version }}
          HUGO_ENVIRONMENT: production
        run: |
          hugo --minify --gc

      - name: Verify build output
        run: |
          test -f docs/index.html
          test -f docs/CNAME
          test -f docs/sitemap.xml
          test -f docs/robots.txt
          test -f docs/llms.txt
          test -f docs/images/og.png
          echo "All expected files present."

      - name: Upload Pages artifact
        if: github.event_name != 'pull_request'
        uses: actions/upload-pages-artifact@v3
        with:
          path: ./docs

  deploy:
    if: github.event_name != 'pull_request'
    needs: build
    runs-on: ubuntu-latest
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4