feat(actions): publish VMIs to VCR on merge

.github/workflows/publish-images.yml

@@ -0,0 +1,97 @@
+name: Publish Images to VCR
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+    paths:
+      - images/**
+      - .github/workflows/publish-images.yml
+
+permissions:
+  contents: read
+
+concurrency:
+  group: publish-images-vcr
+  cancel-in-progress: false
+
+jobs:
+  prepare:
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.images.outputs.matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Generate image matrix
+        id: images
+        uses: docker/bake-action/subaction/matrix@v7
+        with:
+          workdir: images
+          target: default
+
+  publish:
+    name: Publish ${{ matrix.target }}
+    if: github.ref == 'refs/heads/main'
+    needs: prepare
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    env:
+      STAGING_SUFFIX: -staging-${{ github.run_id }}
+    permissions:
+      contents: read
+      id-token: write
+    strategy:
+      fail-fast: false
+      matrix:
+        include: ${{ fromJSON(needs.prepare.outputs.matrix) }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to VCR with OIDC
+        uses: vercel/vcr-action/login@v1
+        with:
+          team: ${{ vars.VERCEL_TEAM_ID }}
+
+      - name: Build and push staging tags
+        id: bake
+        uses: docker/bake-action@v7
+        with:
+          source: images
+          targets: ${{ matrix.target }}
+          vars: |
+            TAG_SUFFIX=${{ env.STAGING_SUFFIX }}
+            PUSH=true
+
+      - name: Select a staging tag for this image
+        id: staging
+        env:
+          STAGING_IMAGES: ${{ fromJSON(steps.bake.outputs.metadata)[matrix.target]['image.name'] }}
+        run: echo "image=${STAGING_IMAGES%%,*}" >> "$GITHUB_OUTPUT"
+
+      - name: Wait for image optimization
+        id: optimized
+        uses: vercel/vcr-action/wait-for-optimized-image@v1
+        timeout-minutes: 11
+        with:
+          image: ${{ steps.staging.outputs.image }}
+          timeout-seconds: 600
+
+      - name: Promote the optimized image to its final tags
+        env:
+          STAGING_IMAGES: ${{ fromJSON(steps.bake.outputs.metadata)[matrix.target]['image.name'] }}
+          DIGEST: ${{ steps.optimized.outputs.digest }}
+        run: |
+          IFS=, read -r -a images <<< "$STAGING_IMAGES"
+          for image in "${images[@]}"; do
+            docker buildx imagetools create \
+              --prefer-index=false \
+              --tag "${image%"$STAGING_SUFFIX"}" \
+              "${image%:*}@$DIGEST"
+          done

.github/workflows/publish.yml

@@ -51,6 +51,8 @@ jobs:
           with:
             source: images
             targets: ${{ matrix.target }}
+            push: false
+            vars: PUSH=false
 
 
   publish:
@@ -101,4 +103,4 @@ jobs:
     permissions:
       contents: read
     steps:
-      - run: echo "Done"
+      - run: echo "Done"

images/docker-bake.hcl

@@ -2,6 +2,14 @@ variable "REGISTRY" {
   default = "vcr.vercel.com/vercel/sandbox"
 }
 
+variable "TAG_SUFFIX" {
+  default = ""
+}
+
+variable "PUSH" {
+  default = false
+}
+
 group "default" {
   targets = ["runtimes", "vmi"]
 }
@@ -16,15 +24,19 @@ group "vmi" {
 
 target "_common" {
   platforms = ["linux/amd64"]
+  attest = [
+    "type=provenance,disabled=true",
+    "type=sbom,disabled=true"
+  ]
   output = [
-    "type=image,oci-mediatypes=true,compression=zstd,compression-level=3,force-compression=true"
+    "type=image,push=${PUSH},oci-mediatypes=true,compression=zstd,compression-level=3,force-compression=true"
   ]
 }
 
 target "ubuntu" {
   inherits = ["_common"]
   context  = "ubuntu"
-  tags     = ["${REGISTRY}/ubuntu:latest"]
+  tags     = ["${REGISTRY}/ubuntu:latest${TAG_SUFFIX}"]
 }
 
 target "node" {
@@ -49,8 +61,8 @@ target "node" {
   inherits = ["_common"]
   context  = "node"
   tags = [
-    "${REGISTRY}/node:${node.major}",
-    "${REGISTRY}/node:${node.version}",
+    "${REGISTRY}/node:${node.major}${TAG_SUFFIX}",
+    "${REGISTRY}/node:${node.version}${TAG_SUFFIX}",
   ]
 
   contexts = {
@@ -65,7 +77,7 @@ target "node" {
 target "python" {
   inherits = ["_common"]
   context  = "python"
-  tags     = ["${REGISTRY}/python:3.14"]
+  tags     = ["${REGISTRY}/python:3.14${TAG_SUFFIX}"]
 
   contexts = {
     base = "target:ubuntu"
@@ -79,7 +91,7 @@ target "python" {
 target "universal" {
   inherits = ["_common"]
   context  = "universal"
-  tags     = ["${REGISTRY}/universal:latest"]
+  tags     = ["${REGISTRY}/universal:latest${TAG_SUFFIX}"]
 
   contexts = {
     base = "target:ubuntu"
@@ -94,7 +106,7 @@ target "universal" {
 target "arch" {
   inherits = ["_common"]
   context  = "arch"
-  tags     = ["${REGISTRY}/arch:latest"]
+  tags     = ["${REGISTRY}/arch:latest${TAG_SUFFIX}"]
 }
 
 target "al-builder-base" {
@@ -138,8 +150,8 @@ target "al-node" {
   context    = "al-node"
   dockerfile = "Dockerfile"
   tags = [
-    "${REGISTRY}/node:al-${node.major}",
-    "${REGISTRY}/node:al-${node.version}",
+    "${REGISTRY}/node:al-${node.major}${TAG_SUFFIX}",
+    "${REGISTRY}/node:al-${node.version}${TAG_SUFFIX}",
   ]
 
   contexts = {
@@ -157,7 +169,7 @@ target "al-python" {
   inherits   = ["_common"]
   context    = "al-python"
   dockerfile = "Dockerfile"
-  tags       = ["${REGISTRY}/python:al-3.13.1"]
+  tags       = ["${REGISTRY}/python:al-3.13.1${TAG_SUFFIX}"]
 
   contexts = {
     builder-base = "target:al-builder-base"