# Build workflow - runs for both PRs and main branch pushes
# This workflow builds the website without access to secrets
# For PRs: Runs on untrusted fork code safely (using pull_request event, not pull_request_target)
# For main: Builds and uploads artifacts for deployment
# Artifacts are passed to the deploy workflow which has access to secrets

name: Build

permissions:
  contents: read

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

env:
  BUILD_PATH: 'dist'

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          # - For PRs: PR head commit
          # - For pushes: the pushed commit
          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}


      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci --prefer-offline --no-audit --progress=false

      - name: Build project
        run: npm run build

      # Upload artifact for deploy workflow
      - name: Upload build artifact
        uses: actions/upload-artifact@v4
        with:
          name: blog-build-${{ github.run_id }}
          path: ${{ env.BUILD_PATH }}
          retention-days: 1