zebflow 0.6.1

Reactive web automation platform — pipelines, templates, and real-time collaboration in a single binary.
Documentation 
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name: Build & Push Docker Image

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  IMAGE: zebflow/zebflow

jobs:
  # ── Compute version once — shared by all jobs ─────────────────────────────
  prepare:
    name: Prepare version
    runs-on: ubuntu-latest
    outputs:
      tag: ${{ steps.version.outputs.tag }}
    steps:
      - uses: actions/checkout@v4
      - name: Compute version
        id: version
        run: |
          CARGO_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)"/\1/')
          BUILD_TIME=$(date -u +"%Y%m%d%H%M")
          TAG="${CARGO_VERSION}.${BUILD_TIME}"
          echo "tag=${TAG}" >> $GITHUB_OUTPUT
          echo "Version: ${TAG}"

  # ── Build each platform on its native runner ──────────────────────────────
  build:
    name: Build ${{ matrix.platform }}
    runs-on: ${{ matrix.runner }}
    needs: prepare
    strategy:
      fail-fast: false
      matrix:
        include:
          - platform: linux/amd64
            runner: ubuntu-latest
          - platform: linux/arm64
            runner: ubuntu-24.04-arm

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Sanitize platform name
        run: echo "PLATFORM_PAIR=$(echo ${{ matrix.platform }} | tr '/' '-')" >> $GITHUB_ENV

      # GHA layer cache — keyed per platform so amd64/arm64 don't share stale layers
      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          context: .
          file: docker/Dockerfile
          platforms: ${{ matrix.platform }}
          build-args: BUILD_VERSION=${{ needs.prepare.outputs.tag }}
          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=gha,scope=${{ env.PLATFORM_PAIR }}-v2
          cache-to: type=gha,mode=max,scope=${{ env.PLATFORM_PAIR }}-v2

      # Pass digest to merge job via artifact (matrix outputs can't be indexed directly)
      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest artifact
        uses: actions/upload-artifact@v4
        with:
          name: digest-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  # ── Merge both digests into a single multi-arch manifest ─────────────────
  merge:
    name: Merge manifest
    runs-on: ubuntu-latest
    needs: [prepare, build]

    steps:
      - name: Download digest artifacts
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digest-*
          merge-multiple: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Create and push multi-arch manifest
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            -t ${{ env.IMAGE }}:${{ needs.prepare.outputs.tag }} \
            -t ${{ env.IMAGE }}:latest \
            $(printf '${{ env.IMAGE }}@sha256:%s ' *)

      - name: Inspect final manifest
        run: docker buildx imagetools inspect ${{ env.IMAGE }}:${{ needs.prepare.outputs.tag }}