Drop build for deprecated architectures and re-tag legacy build instead (#6347)

To ensure that e.g. airgapped devices running on deprecated archs can still
update the Supervisor when they become online, the version of Supervisor in the
version file must stay available for all architectures. Since the base images
will no longer exist for those archs and to avoid the need for building it from
current source, add job that pulls the last available image, changes the label
in the metadata and publishes it under the new tag. That way we'll get a new
image with a different SHA (compared to a plain re-tag), so the GHCR metrics
should reflect how many devices still pull these old images.

.github/workflows/builder.yml

@@ -34,6 +34,9 @@ on:
 
 env:
   DEFAULT_PYTHON: "3.13"
+  COSIGN_VERSION: "v2.5.3"
+  CRANE_VERSION: "v0.20.7"
+  CRANE_SHA256: "8ef3564d264e6b5ca93f7b7f5652704c4dd29d33935aff6947dd5adefd05953e"
   BUILD_NAME: supervisor
   BUILD_TYPE: supervisor
 
@@ -134,7 +137,7 @@ jobs:
         if: needs.init.outputs.publish == 'true'
         uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
         with:
-          cosign-release: "v2.5.3"
+          cosign-release: ${{ env.COSIGN_VERSION }}
 
       - name: Install dirhash and calc hash
         if: needs.init.outputs.publish == 'true'
@@ -173,7 +176,7 @@ jobs:
 
   version:
     name: Update version
-    needs: ["init", "run_supervisor"]
+    needs: ["init", "run_supervisor", "retag_deprecated"]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the repository
@@ -352,3 +355,50 @@ jobs:
       - name: Get supervisor logs on failiure
         if: ${{ cancelled() || failure() }}
         run: docker logs hassio_supervisor
+
+  retag_deprecated:
+    needs: ["build", "init"]
+    name: Re-tag deprecated ${{ matrix.arch }} images
+    if: needs.init.outputs.publish == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+      packages: write
+    strategy:
+      matrix:
+        arch: ["armhf", "armv7", "i386"]
+    env:
+      # Last available release for deprecated architectures
+      FROZEN_VERSION: "2025.11.5"
+    steps:
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install Cosign
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
+        with:
+          cosign-release: ${{ env.COSIGN_VERSION }}
+
+      - name: Install crane
+        run: |
+          curl -sLO https://github.com/google/go-containerregistry/releases/download/${{ env.CRANE_VERSION }}/go-containerregistry_Linux_x86_64.tar.gz
+          echo "${{ env.CRANE_SHA256 }}  go-containerregistry_Linux_x86_64.tar.gz" | sha256sum -c -
+          tar xzf go-containerregistry_Linux_x86_64.tar.gz crane
+          sudo mv crane /usr/local/bin/
+
+      - name: Re-tag deprecated image with updated version label
+        run: |
+          crane auth login ghcr.io -u ${{ github.repository_owner }} -p ${{ secrets.GITHUB_TOKEN }}
+          crane mutate \
+            --label io.hass.version=${{ needs.init.outputs.version }} \
+            --tag ghcr.io/home-assistant/${{ matrix.arch }}-hassio-supervisor:${{ needs.init.outputs.version }} \
+            ghcr.io/home-assistant/${{ matrix.arch }}-hassio-supervisor:${{ env.FROZEN_VERSION }}
+
+      - name: Sign image with Cosign
+        run: |
+          cosign sign --yes ghcr.io/home-assistant/${{ matrix.arch }}-hassio-supervisor:${{ needs.init.outputs.version }}

build.yaml

@@ -1,10 +1,7 @@
 image: ghcr.io/home-assistant/{arch}-hassio-supervisor
 build_from:
   aarch64: ghcr.io/home-assistant/aarch64-base-python:3.13-alpine3.22-2025.11.1
-  armhf: ghcr.io/home-assistant/armhf-base-python:3.13-alpine3.22-2025.11.1
-  armv7: ghcr.io/home-assistant/armv7-base-python:3.13-alpine3.22-2025.11.1
   amd64: ghcr.io/home-assistant/amd64-base-python:3.13-alpine3.22-2025.11.1
-  i386: ghcr.io/home-assistant/i386-base-python:3.13-alpine3.22-2025.11.1
 cosign:
   base_identity: https://github.com/home-assistant/docker-base/.*
   identity: https://github.com/home-assistant/supervisor/.*