ci: publish pgvector images to GHCR

.github/workflows/docker-publish.yml

@@ -0,0 +1,226 @@
+name: Docker Publish
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'Dockerfile'
+      - 'Makefile'
+      - '.github/workflows/docker-publish.yml'
+  pull_request:
+    paths:
+      - 'Dockerfile'
+      - 'Makefile'
+      - '.github/workflows/docker-publish.yml'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+  PG_MAJOR: 17
+  DEBIAN_CODENAME: bookworm
+
+jobs:
+  metadata:
+    runs-on: ubuntu-24.04
+    outputs:
+      version: ${{ steps.version.outputs.version }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v7.0.1
+
+      - name: Resolve pgvector version
+        id: version
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          version="$(awk '$1 == "EXTVERSION" && $2 == "=" { print $3; exit }' Makefile)"
+          dockerfile_version="$(sed -n 's|.*pgvector.git#v\([^[:space:]]*\).*|\1|p' Dockerfile)"
+
+          if [[ ! "$version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "Invalid pgvector version from Makefile: $version" >&2
+            exit 1
+          fi
+
+          if [ "$version" != "$dockerfile_version" ]; then
+            echo "Makefile version $version does not match Dockerfile version $dockerfile_version" >&2
+            exit 1
+          fi
+
+          echo "version=$version" >> "$GITHUB_OUTPUT"
+
+  validate:
+    needs: metadata
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v7.0.1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Build amd64 image
+        uses: docker/build-push-action@v7
+        with:
+          context: .
+          platforms: linux/amd64
+          push: false
+          pull: true
+          no-cache: true
+          build-args: |
+            PG_MAJOR=${{ env.PG_MAJOR }}
+            DEBIAN_CODENAME=${{ env.DEBIAN_CODENAME }}
+          labels: |
+            org.opencontainers.image.source=${{ github.event.repository.html_url }}
+            org.opencontainers.image.revision=${{ github.sha }}
+            org.opencontainers.image.version=${{ needs.metadata.outputs.version }}
+
+  build:
+    needs: metadata
+    if: github.event_name != 'pull_request'
+    permissions:
+      contents: read
+      packages: write
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-24.04
+            arch: amd64
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+            arch: arm64
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v7.0.1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v4
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push image by digest
+        id: build
+        uses: docker/build-push-action@v7
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          pull: true
+          no-cache: true
+          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          build-args: |
+            PG_MAJOR=${{ env.PG_MAJOR }}
+            DEBIAN_CODENAME=${{ env.DEBIAN_CODENAME }}
+          labels: |
+            org.opencontainers.image.source=${{ github.event.repository.html_url }}
+            org.opencontainers.image.revision=${{ github.sha }}
+            org.opencontainers.image.version=${{ needs.metadata.outputs.version }}
+
+      - name: Export digest
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          digest="${{ steps.build.outputs.digest }}"
+          if [[ ! "$digest" =~ ^sha256:[0-9a-f]{64}$ ]]; then
+            echo "Build returned an invalid image digest: $digest" >&2
+            exit 1
+          fi
+
+          mkdir -p /tmp/digests
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v7
+        with:
+          name: digest-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  publish:
+    needs: [metadata, build]
+    if: github.event_name != 'pull_request'
+    permissions:
+      contents: read
+      packages: write
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v8.0.1
+        with:
+          path: /tmp/digests
+          pattern: digest-*
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v4
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Publish multi-arch manifest
+        env:
+          PGVECTOR_VERSION: ${{ needs.metadata.outputs.version }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          shopt -s nullglob
+
+          image="${REGISTRY}/${IMAGE_NAME}"
+          refs=()
+          for digest_file in /tmp/digests/digest-*/*; do
+            digest="$(basename "$digest_file")"
+            refs+=("${image}@sha256:${digest}")
+          done
+
+          if [ "${#refs[@]}" -ne 2 ]; then
+            echo "Expected two platform digests, found ${#refs[@]}" >&2
+            exit 1
+          fi
+
+          docker buildx imagetools create \
+            --tag "${image}:pg${PG_MAJOR}" \
+            --tag "${image}:pg${PG_MAJOR}-${DEBIAN_CODENAME}" \
+            --tag "${image}:${PGVECTOR_VERSION}-pg${PG_MAJOR}" \
+            --tag "${image}:${PGVECTOR_VERSION}-pg${PG_MAJOR}-${DEBIAN_CODENAME}" \
+            "${refs[@]}"
+
+      - name: Verify published platforms
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          image="${REGISTRY}/${IMAGE_NAME}:pg${PG_MAJOR}"
+          manifest="$(docker buildx imagetools inspect --raw "$image")"
+
+          for arch in amd64 arm64; do
+            jq -e --arg arch "$arch" \
+              'any(.manifests[]; .platform.os == "linux" and .platform.architecture == $arch)' \
+              <<< "$manifest" > /dev/null
+          done
+
+          docker buildx imagetools inspect "$image"