drb-update: trust INSTALL_DIR for git so a user-owned checkout can update

radio-box (INSTALL_DIR=/home/pi/node-26, owned by pi) failed every update:
root's git refused the repo as 'dubious ownership', so origin read as ''
and the origin check refused. Scope safe.directory to INSTALL_DIR via
GIT_CONFIG_* env (command-line scope) for the updater process only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitea/workflows/build-edge-node.yml

@@ -47,7 +47,7 @@ jobs:
         with:
           context: ./drb-edge-node
           file: ./drb-edge-node/Dockerfile
-          platforms: linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             git.vpn.cusano.net/${{ vars.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}/${{ env.CONTAINER_NAME }}:${{ steps.meta.outputs.VERSION }}

.gitea/workflows/build-icecast.yml

@@ -47,7 +47,7 @@ jobs:
         with:
           context: ./icecast
           file: ./icecast/Dockerfile
-          platforms: linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             git.vpn.cusano.net/${{ vars.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}/${{ env.CONTAINER_NAME }}:${{ steps.meta.outputs.VERSION }}

.gitea/workflows/build-op25.yml

@@ -47,7 +47,7 @@ jobs:
         with:
           context: ./op25-container
           file: ./op25-container/Dockerfile
-          platforms: linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             git.vpn.cusano.net/${{ vars.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}/${{ env.CONTAINER_NAME }}:${{ steps.meta.outputs.VERSION }}

.gitea/workflows/build-secondary-sdr.yml

@@ -47,7 +47,7 @@ jobs:
         with:
           context: ./secondary-sdr-container
           file: ./secondary-sdr-container/Dockerfile
-          platforms: linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             git.vpn.cusano.net/${{ vars.DOCKER_ORG }}/${{ steps.meta.outputs.REPO_NAME }}/${{ env.CONTAINER_NAME }}:${{ steps.meta.outputs.VERSION }}

.gitea/workflows/publish-public.yml

@@ -95,7 +95,7 @@ jobs:
         with:
           context: ${{ matrix.context }}
           file: ${{ matrix.file }}
-          platforms: linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             ${{ vars.PUBLIC_REGISTRY }}/${{ vars.PUBLIC_NAMESPACE }}/drb-${{ matrix.name }}:${{ steps.meta.outputs.VERSION }}

.gitea/workflows/release-images.yml

@@ -67,12 +67,16 @@ jobs:
           TAG="src-$(git rev-parse HEAD:${{ matrix.context }})"
           echo "IMAGE=$IMAGE" >> $GITHUB_OUTPUT
           echo "TAG=$TAG" >> $GITHUB_OUTPUT
-          if docker buildx imagetools inspect "$IMAGE:$TAG" >/dev/null 2>&1; then
+          # Present only counts if BOTH platforms are in it: src- tags pushed
+          # before node-26#28 are arm64-only, and an amd64 node can't pull them.
+          RAW="$(docker buildx imagetools inspect --raw "$IMAGE:$TAG" 2>/dev/null | tr -d ' \n' || true)"
+          if printf '%s' "$RAW" | grep -q '"architecture":"amd64"' \
+             && printf '%s' "$RAW" | grep -q '"architecture":"arm64"'; then
             echo "EXISTS=true" >> $GITHUB_OUTPUT
-            echo "$IMAGE:$TAG already published — nothing to do"
+            echo "$IMAGE:$TAG already published for amd64 + arm64 — nothing to do"
           else
             echo "EXISTS=false" >> $GITHUB_OUTPUT
-            echo "$IMAGE:$TAG missing — building it"
+            echo "$IMAGE:$TAG missing or not multi-arch — building it"
           fi
 
       - if: steps.meta.outputs.EXISTS != 'true'
@@ -80,8 +84,8 @@ jobs:
         with:
           context: ./${{ matrix.context }}
           file: ./${{ matrix.context }}/Dockerfile
-          # arm64 only, same as the build-*.yml workflows (node-26#28).
-          platforms: linux/arm64
+          # amd64 + arm64, same as the build-*.yml workflows (node-26#28).
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.IMAGE }}:${{ steps.meta.outputs.TAG }}
           cache-from: type=registry,ref=${{ steps.meta.outputs.IMAGE }}:buildcache

install.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# DRB edge node — one-shot bootstrap for a clean Raspberry Pi OS (arm64).
+# DRB edge node — one-shot bootstrap for a clean Raspberry Pi OS (arm64) or Debian (amd64).
 #
 #   curl -fsSL https://git.vpn.cusano.net/logan/node-26/raw/tag/v1/install.sh \
 #     | sudo bash -s -- --node-id node-003 \
@@ -228,8 +228,8 @@ command -v apt-get >/dev/null || die "apt-get not found — this script targets
 
 ARCH="$(dpkg --print-architecture)"
 case "$ARCH" in
-  arm64|aarch64) ok "arch $ARCH" ;;
-  *) warn "arch is $ARCH — CI only builds linux/arm64 images. Prebuilt pull will fail; use --build." ;;
+  arm64|aarch64|amd64|x86_64) ok "arch $ARCH" ;;
+  *) warn "arch is $ARCH — CI only builds linux/amd64 + linux/arm64 images. Prebuilt pull will fail; use --build." ;;
 esac
 ok "running as root"
 

scripts/drb-update.sh

@@ -51,6 +51,12 @@ main() {
   flock -n 9 || { log "another update is already running"; return 0; }
 
   cd "$INSTALL_DIR"
+  # This runs as root, but a pre-install.sh checkout (e.g. /home/pi/node-26)
+  # is owned by the login user, and git >= 2.35.2 then refuses every command
+  # with "dubious ownership" — which surfaced as origin '' != REPO_URL. Trust
+  # exactly the configured INSTALL_DIR, for this process only (env config is
+  # command-line scope, which safe.directory honours; no global config change).
+  export GIT_CONFIG_COUNT=1 GIT_CONFIG_KEY_0=safe.directory GIT_CONFIG_VALUE_0="$INSTALL_DIR"
   envget() { grep -E "^$1=" .env 2>/dev/null | head -1 | cut -d= -f2- | tr -d '"' || true; }
   local NODE_ID C2_URL
   NODE_ID="$(envget NODE_ID)"; C2_URL="$(envget C2_URL)"; C2_URL="${C2_URL%/}"