name: Build and Push Minecraft Docker Images on Debian-base update

on:
  push:
    branches:
      - master
    paths:
      - '.github/workflows/**'
      - '**/Dockerfile'
      - '**/*.sh'
      - '!**/CHANGES.md'
      - '!**/build-info.json'
  workflow_dispatch: {}
  schedule:
    - cron: '30 */6 * * *'

env:
  IMAGE_REGISTRY: gitea.fithwum.tech
  IMAGE_ORG: ${{ secrets.GIT_USERNAME }}
  IMAGE_REPO_DEBIAN: debian-base
  IMAGE_REPO_MINECRAFT: minecraft
  IMAGE_TAG_DEBIAN: bookworm
  DIGEST_FILE: .cache/debian-base.digest

jobs:
  poll-debian-base-and-detect-changes:
    runs-on: docker-build
    outputs:
      digest_changed: ${{ steps.compare_digest.outputs.changed }}
      versions_changed: ${{ steps.check_changed_versions.outputs.versions_changed }}

    steps:
      - name: Checkout repo
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Ensure .cache exists
        run: mkdir -p .cache && touch .cache/.gitkeep

      - name: Log in to Gitea Registry
        run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login ${{ env.IMAGE_REGISTRY }} -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin

      - name: Get current digest of debian-base image
        id: get_digest
        run: |
          IMAGE="${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_ORG }}/${{ env.IMAGE_REPO_DEBIAN }}:${{ env.IMAGE_TAG_DEBIAN }}"
          docker pull "$IMAGE" > /dev/null
          DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' "$IMAGE")
          echo "digest=$DIGEST" >> $GITHUB_OUTPUT
          echo "$DIGEST" > .cache/debian-base.digest.new

      - name: Compare with stored digest
        id: compare_digest
        run: |
          CURRENT_DIGEST="${{ steps.get_digest.outputs.digest }}"
          LAST_DIGEST="$(cat ${{ env.DIGEST_FILE }} 2>/dev/null || echo '')"
          if [ "$CURRENT_DIGEST" = "$LAST_DIGEST" ]; then
            echo "changed=false" >> $GITHUB_OUTPUT
          else
            echo "$CURRENT_DIGEST" > ${{ env.DIGEST_FILE }}
            git config user.name "${{ secrets.GIT_USERNAME }}"
            git config user.email "${{ secrets.GIT_EMAIL }}"
            git add ${{ env.DIGEST_FILE }}
            git commit -m "Update base digest to $CURRENT_DIGEST" || true
            git push
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Detect changed Minecraft versions
        id: check_changed_versions
        run: |
          BEFORE_COMMIT="${{ github.event.before }}"
          if [ -z "$BEFORE_COMMIT" ] || ! git cat-file -e "$BEFORE_COMMIT^{commit}" 2>/dev/null; then
            BEFORE_COMMIT=$(git rev-parse HEAD~1)
          fi
          CHANGED=$(git diff --name-only "$BEFORE_COMMIT" HEAD || true)
          CHANGED_VERSIONS=""
          for version in vanilla testing fabric; do
            echo "$CHANGED" | grep -q "^$version/.*\.\(sh\|Dockerfile\)$" && CHANGED_VERSIONS="$CHANGED_VERSIONS $version"
          done
          CHANGED_VERSIONS=$(echo "$CHANGED_VERSIONS" | xargs) # trim whitespace
          echo "versions_changed=$CHANGED_VERSIONS" >> $GITHUB_OUTPUT

  build-minecraft-images:
    runs-on: docker-build
    needs: poll-debian-base-and-detect-changes
    if: needs.poll-debian-base-and-detect-changes.outputs.digest_changed == 'true' || needs.poll-debian-base-and-detect-changes.outputs.versions_changed != ''
    strategy:
      matrix:
        version: [vanilla, testing, fabric]
    name: Build and Push ${{ matrix.version }}
    steps:
      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Log in to Gitea Registry
        run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login ${{ env.IMAGE_REGISTRY }} -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin

      - name: Build and push image
        run: |
          IMAGE="$IMAGE_REGISTRY/$IMAGE_ORG/$IMAGE_REPO_MINECRAFT:${{ matrix.version }}"
          docker buildx build --platform linux/amd64 --push -t "$IMAGE" "./${{ matrix.version }}"

  generate-changelogs:
    needs: build-minecraft-images
    runs-on: docker-build
    strategy:
      matrix:
        version: [vanilla, testing, fabric]

    steps:
      - name: Checkout source
        uses: actions/checkout@v3

      - name: Clone Minecraft repo
        run: git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_TOKEN }}@gitea.fithwum.tech/fithwum/minecraft.git upload-repo

      - name: Update changelog
        run: |
          cd upload-repo
          changelog="${{ matrix.version }}/CHANGES.md"
          mkdir -p "$(dirname "$changelog")"
          touch "$changelog"
          
          infofile="${{ matrix.version }}/build-info.json"
          last_commit=""
          if [ -f "$infofile" ]; then
            last_commit=$(jq -r '.commit' "$infofile")
          fi

          echo -e "\n## $(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> "$changelog"
          if [ -n "$last_commit" ]; then
            git log "${last_commit}..HEAD" --pretty=format:"- %s (%an)" | head -n 10 >> "$changelog"
          else
            git log -n 10 --pretty=format:"- %s (%an)" >> "$changelog"
          fi

      - name: Commit and push changelog
        run: |
          cd upload-repo
          git config user.name "${{ secrets.GIT_USERNAME }}"
          git config user.email "${{ secrets.GIT_EMAIL }}"
          git add "${{ matrix.version }}/CHANGES.md"
          git commit -m "Update changelog for ${{ matrix.version }}" || true
          git push

  generate-build-info:
    needs: generate-changelogs
    runs-on: docker-build
    strategy:
      matrix:
        version: [vanilla, testing, fabric]

    steps:
      - name: Checkout source
        uses: actions/checkout@v3

      - name: Clone Minecraft repo
        run: git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_TOKEN }}@gitea.fithwum.tech/fithwum/minecraft.git upload-repo

      - name: Generate build-info.json
        run: |
          human_size() {
            local b=$1 d='' s=0 S=(B KB MB GB TB)
            while ((b >= 1024 && s < ${#S[@]}-1)); do d=$((b % 1024)); b=$((b / 1024)); s=$((s + 1)); done
            printf "%s%s\n" "$b" "${S[$s]}"
          }

          cd upload-repo
          mkdir -p "${{ matrix.version }}"
          infofile="${{ matrix.version }}/build-info.json"
          image="${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_ORG }}/${{ env.IMAGE_REPO_MINECRAFT }}:${{ matrix.version }}"
          digest=$(docker inspect --format='{{index .RepoDigests 0}}' "$image" 2>/dev/null || echo "unknown")
          size_bytes=$(docker image inspect "$image" --format='{{.Size}}' 2>/dev/null || echo "0")
          size_human=$(human_size "$size_bytes")

          jq -n \
            --arg version "${{ matrix.version }}" \
            --arg commit "$(git rev-parse HEAD)" \
            --arg build_time "$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
            --arg image_tag "$image" \
            --arg digest "$digest" \
            --arg image_size "$size_human" \
            --argjson image_size_bytes "$size_bytes" \
            '{
              version: $version,
              commit: $commit,
              build_time: $build_time,
              image_tag: $image_tag,
              digest: $digest,
              image_size: $image_size,
              image_size_bytes: $image_size_bytes
            }' > "$infofile"

      - name: Commit and push build-info
        run: |
          cd upload-repo
          git config user.name "${{ secrets.GIT_USERNAME }}"
          git config user.email "${{ secrets.GIT_EMAIL }}"
          git add "${{ matrix.version }}/build-info.json"
          git




















# name: Build and Push Minecraft Docker Images on Debian-base update

# on:
#   push:
#     branches:
#       - master
#     paths:
#       - '**/Dockerfile'
#       - '**/*.sh'
#       - '.github/workflows/**'
#       - '!**/CHANGES.md'
#       - '!**/build-info.json'
#   schedule:
#     - cron: '30 */6 * * *'  # Every 6 hours

# env:
#   IMAGE_REGISTRY: gitea.fithwum.tech
#   IMAGE_ORG: ${{ secrets.GIT_USERNAME }}
#   IMAGE_REPO_DEBIAN: debian-base
#   IMAGE_REPO_MINECRAFT: minecraft
#   IMAGE_TAG_DEBIAN: bookworm
#   DIGEST_FILE: .cache/debian-base.digest

# jobs:
#   poll-debian-base-and-build:
#     runs-on: docker-build

#     steps:
#       - name: Checkout repo
#         uses: actions/checkout@v3
#         with:
#           fetch-depth: 0

#       - name: Ensure .cache exists with .gitkeep
#         run: |
#           mkdir -p .cache
#           touch .cache/.gitkeep

#       - name: Log in to Gitea Registry
#         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login ${{ env.IMAGE_REGISTRY }} -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin

#       - name: Get current digest of debian-base image
#         id: get_digest
#         run: |
#           IMAGE="${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_ORG }}/${{ env.IMAGE_REPO_DEBIAN }}:${{ env.IMAGE_TAG_DEBIAN }}"
#           echo "Checking image: $IMAGE"
#           docker pull "$IMAGE" > /dev/null
#           DIGEST=$(docker inspect --format='{{index .RepoDigests 0}}' "$IMAGE" 2>/dev/null || echo "")
#           if [ -z "$DIGEST" ]; then
#             echo "Failed to get digest for $IMAGE"
#             exit 1
#           fi
#           echo "digest=$DIGEST" >> $GITHUB_OUTPUT
#           echo "$DIGEST" > .cache/debian-base.digest.new

#       - name: Compare with stored digest
#         id: compare_digest
#         run: |
#           CURRENT_DIGEST="${{ steps.get_digest.outputs.digest }}"
#           LAST_DIGEST=""

#           if [ -f "${{ env.DIGEST_FILE }}" ]; then
#             LAST_DIGEST=$(cat "${{ env.DIGEST_FILE }}")
#           fi

#           echo "Current digest: $CURRENT_DIGEST"
#           echo "Last digest: $LAST_DIGEST"

#           if [ "$CURRENT_DIGEST" = "$LAST_DIGEST" ]; then
#             echo "Digest unchanged. Skipping build."
#             echo "changed=false" >> $GITHUB_OUTPUT
#           else
#             echo "Digest changed or first run."
#             echo "$CURRENT_DIGEST" > "${{ env.DIGEST_FILE }}"
#             git config user.name "${{ secrets.GIT_USERNAME }}"
#             git config user.email "${{ secrets.GIT_EMAIL }}"
#             git add "${{ env.DIGEST_FILE }}"
#             git commit -m "Update debian-base image digest to $CURRENT_DIGEST" || echo "No changes to commit"
#             git push
#             echo "changed=true" >> $GITHUB_OUTPUT
#           fi

#       - name: Check which Minecraft versions changed
#         id: check_changed_versions
#         run: |
#           set -e

#           BEFORE_COMMIT="${{ github.event.before }}"
#           if [ -z "$BEFORE_COMMIT" ] || ! git cat-file -e "$BEFORE_COMMIT^{commit}" 2>/dev/null; then
#             echo "[WARN] 'before' commit missing or invalid, using HEAD~1"
#             BEFORE_COMMIT=$(git rev-parse HEAD~1)
#           fi

#           echo "[INFO] Diffing against $BEFORE_COMMIT"

#           CHANGED_FILES=$(git diff --name-only "$BEFORE_COMMIT" HEAD || true)
#           echo "[INFO] Changed files:"
#           echo "$CHANGED_FILES"

#           VERSIONS_CHANGED=""

#           for version in vanilla testing fabric; do
#             if echo "$CHANGED_FILES" | grep -q "^$version/.*\.\(sh\|Dockerfile\)$"; then
#               echo "[INFO] Detected changes in $version"
#               VERSIONS_CHANGED="$VERSIONS_CHANGED $version"
#             fi
#           done

#           # Store output
#           echo "versions_changed=$VERSIONS_CHANGED" >> $GITHUB_OUTPUT

#         outputs:
#           digest_changed: ${{ steps.compare_digest.outputs.changed }}
#           versions_changed: ${{ steps.check_changed_versions.outputs.versions_changed }}

#   build-minecraft-images:
#     runs-on: docker-build
#     needs: poll-debian-base-and-build
#     if: needs.poll-debian-base-and-build.outputs.digest_changed == 'true' || needs.poll-debian-base-and-build.outputs.versions_changed != ''
#     strategy:
#       matrix:
#         version: [vanilla, testing, fabric]
#     name: Build ${{ matrix.version }} image

#     steps:
#       - name: Checkout repo
#         uses: actions/checkout@v3

#       - name: Log in to Gitea Registry
#         run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login ${{ env.IMAGE_REGISTRY }} -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin

#       - name: Build and Push Minecraft Image
#         run: |
#           IMAGE="$IMAGE_REGISTRY/$IMAGE_ORG/$IMAGE_REPO_MINECRAFT:${{ matrix.version }}"
#           echo "[INFO] Building and pushing $IMAGE"
#           docker buildx build --platform linux/amd64 --push -t "$IMAGE" "./${{ matrix.version }}"


#   generate-changelogs:
#     needs: build-minecraft-images
#     runs-on: docker-build

#     steps:
#       - name: Checkout source
#         uses: actions/checkout@v3

#       - name: Clone Minecraft repo
#         run: |
#           git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_TOKEN }}@gitea.fithwum.tech/fithwum/minecraft.git upload-repo

#       - name: Generate per-version changelogs
#         run: |
#           cd upload-repo
#           for version in vanilla testing fabric; do
#             echo "[INFO] Updating changelog for $version"
#             changelog="$version/CHANGES.md"
#             mkdir -p "$(dirname "$changelog")"
#             touch "$changelog"

#             infofile="$version/build-info.json"
#             last_commit=""
#             if [ -f "$infofile" ]; then
#               last_commit=$(jq -r '.commit' "$infofile")
#             fi

#             echo -e "\n## $(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> "$changelog"
#             if [ -n "$last_commit" ]; then
#               git log "${last_commit}..HEAD" --pretty=format:"- %s (%an)" | head -n 10 >> "$changelog"
#             else
#               git log -n 10 --pretty=format:"- %s (%an)" >> "$changelog"
#             fi
#           done

#       - name: Commit and push changelogs if changed
#         run: |
#           cd upload-repo
#           git config user.name "${{ secrets.GIT_USERNAME }}"
#           git config user.email "${{ secrets.GIT_EMAIL }}"

#           if git status --porcelain | grep .; then
#             git add */CHANGES.md
#             git commit -m "Update changelogs on $(date -u +'%Y-%m-%dT%H:%M:%SZ') [skip ci]" --no-verify
#             git push
#           else
#             echo "[INFO] No changelog changes to commit."
#           fi

#   generate-build-info:
#     needs: generate-changelogs
#     runs-on: docker-build

#     steps:
#       - name: Checkout source
#         uses: actions/checkout@v3

#       - name: Clone Minecraft repo
#         run: |
#           git clone https://${{ secrets.GIT_USERNAME }}:${{ secrets.GIT_TOKEN }}@gitea.fithwum.tech/fithwum/minecraft.git upload-repo

#       - name: Generate build-info.json per version
#         run: |
#           human_size() {
#             local b=$1
#             local d=''
#             local s=0
#             local S=(B KB MB GB TB)
#             while ((b >= 1024 && s < ${#S[@]}-1)); do
#               d=$((b % 1024))
#               b=$((b / 1024))
#               s=$((s + 1))
#             done
#             printf "%s%s\n" "$b" "${S[$s]}"
#           }

#           cd upload-repo
#           for version in vanilla testing fabric; do
#             echo "[INFO] Generating build-info.json for $version"
#             mkdir -p "$version"
#             infofile="$version/build-info.json"
#             image="${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_ORG }}/${{ env.IMAGE_REPO_MINECRAFT }}:$version"

#             digest=$(docker inspect --format='{{if .RepoDigests}}{{index .RepoDigests 0}}{{else}}unknown{{end}}' "$image" 2>/dev/null || echo "unknown")
#             size_bytes=$(docker image inspect "$image" --format='{{.Size}}' 2>/dev/null || echo "0")

#             size_bytes=${size_bytes//[^0-9]/}
#             if [[ -z "$size_bytes" ]]; then size_bytes=0; fi

#             size_human=$(human_size "$size_bytes")

#             jq -n \
#               --arg version "$version" \
#               --arg commit "$(git rev-parse HEAD)" \
#               --arg build_time "$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
#               --arg image_tag "$image" \
#               --arg digest "$digest" \
#               --arg image_size "$size_human" \
#               --argjson image_size_bytes "$size_bytes" \
#               '{
#                 version: $version,
#                 commit: $commit,
#                 build_time: $build_time,
#                 image_tag: $image_tag,
#                 digest: $digest,
#                 image_size: $image_size,
#                 image_size_bytes: $image_size_bytes
#               }' > "$infofile"
#           done

#       - name: Commit and push build-info if changed
#         run: |
#           cd upload-repo
#           git config user.name "${{ secrets.GIT_USERNAME }}"
#           git config user.email "${{ secrets.GIT_EMAIL }}"

#           if git status --porcelain | grep .; then
#             git add */build-info.json
#             git commit -m "Update build-info on $(date -u +'%Y-%m-%dT%H:%M:%SZ') [skip ci]"
#             git push

#             for version in vanilla testing fabric; do
#               TAG="build-$version"
#               git tag -d "$TAG" 2>/dev/null || true
#               git tag "$TAG"
#               git push origin "$TAG" --force
#             done
#           else
#             echo "[INFO] No build-info changes to commit."
#           fi