deploy.yml

name: Build and Publish Blog Image

on:
  push:
    branches: [ "main" ] # main 브랜치에 코드가 들어올 때만 트리거

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: lim-han/blog

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write # GHCR에 이미지를 Push하기 위한 권한 (IAM)

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          submodules: recursive  # 핵심 에러 핸들링: PaperMod 테마를 온전히 가져오기 위함
          fetch-depth: 0

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }} # GitHub이 임시 발급하는 안전한 토큰 사용

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest
            type=sha

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}