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Add GitHub Actions workflow for building and pushing Docker images to GHCR
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‎.github/workflows/build-and-push.yml‎

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name: Build and Push to GHCR
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on:
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push:
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branches: [ "master" ]
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paths:
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- 'Dockerfile'
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- '.dockerignore'
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- 'cpp2rust-*.sh'
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- 'cmake/**'
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- 'cpp2rust/**'
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- 'rules/**'
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- 'libcc2rs/**'
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- 'libcc2rs-macros/**'
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- 'libc-dep/**'
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- 'rule-preprocessor/**'
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- '.github/workflows/build-and-push.yml'
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workflow_dispatch:
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env:
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REGISTRY: ghcr.io
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IMAGE_NAME: ${{ github.repository }}
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jobs:
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build:
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strategy:
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matrix:
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include:
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- platform: linux/amd64
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runner: ubuntu-latest
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- platform: linux/arm64
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runner: ubuntu-24.04-arm
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runs-on: ${{ matrix.runner }}
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permissions:
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contents: read
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packages: write
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steps:
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- name: Checkout repository
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uses: actions/checkout@v7
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v4
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- name: Log in to GHCR
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uses: docker/login-action@v4
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with:
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registry: ${{ env.REGISTRY }}
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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- name: Extract metadata
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id: meta
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uses: docker/metadata-action@v6
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with:
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images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
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- name: Build and push by digest
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id: build
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uses: docker/build-push-action@v7
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with:
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context: .
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file: ./Dockerfile
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platforms: ${{ matrix.platform }}
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labels: ${{ steps.meta.outputs.labels }}
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outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
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- name: Export digest
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run: |
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mkdir -p /tmp/digests
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digest="${{ steps.build.outputs.digest }}"
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touch "/tmp/digests/${digest#sha256:}"
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- name: Upload digest
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uses: actions/upload-artifact@v7
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with:
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name: digests-${{ strategy.job-index }}
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path: /tmp/digests/*
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if-no-files-found: error
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retention-days: 1
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merge:
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runs-on: ubuntu-latest
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needs: build
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permissions:
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packages: write
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steps:
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- name: Download digests
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uses: actions/download-artifact@v8
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with:
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path: /tmp/digests
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pattern: digests-*
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merge-multiple: true
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v4
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- name: Log in to GHCR
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uses: docker/login-action@v4
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with:
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registry: ${{ env.REGISTRY }}
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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- name: Create manifest list and push
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working-directory: /tmp/digests
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run: |
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docker buildx imagetools create -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest \
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$(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)

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