Rebuild natives

native/build-support/build-all-linux-natives.sh

@@ -5,29 +5,44 @@ set -e
 # make sure we're in the correct directory - the top-level `native` directory
 cd "$(dirname "$0")/.." || exit 1
 
+# Use docker by default, falling back to podman. Set CONTAINER_ENGINE to pick one explicitly.
+if [ -z "$CONTAINER_ENGINE" ]; then
+  if command -v docker > /dev/null 2>&1; then
+    CONTAINER_ENGINE=docker
+  elif command -v podman > /dev/null 2>&1; then
+    CONTAINER_ENGINE=podman
+  else
+    echo "Neither docker nor podman was found on PATH." >&2
+    exit 1
+  fi
+fi
+
+echo "Using container engine: $CONTAINER_ENGINE"
+
 ARCHS=(x86_64 aarch64)
 BASE_DOCKERFILE_VARIANTS=(ubuntu-focal ubuntu-jammy alpine)
 COMPRESSION_VARIANTS=(ubuntu-focal alpine)
 
+# Build one image per (variant, arch). Passing several --platform flags to a single tagged build
+# does not produce a multi-arch tag - only the last architecture keeps the tag, and the run below
+# then sees a platform mismatch, treats the image as missing and tries to pull it from a registry.
 for variant in "${BASE_DOCKERFILE_VARIANTS[@]}"; do
-  docker_platforms=""
   for arch in "${ARCHS[@]}"; do
-    docker_platforms="$docker_platforms --platform linux/${arch}"
+    echo "Building base build image for $variant on $arch..."
+    $CONTAINER_ENGINE build -t velocity-native-build:$variant-$arch --platform linux/${arch} \
+      -f build-support/$variant.Dockerfile .
   done
-
-  echo "Building base build image for $variant..."
-  docker build -t velocity-native-build:$variant $docker_platforms -f build-support/$variant.Dockerfile .
 done
 
 for arch in "${ARCHS[@]}"; do
   for variant in "${BASE_DOCKERFILE_VARIANTS[@]}"; do
     echo "Building native crypto for $arch on $variant..."
 
-    docker run --rm -v "$(pwd)":/app --platform linux/${arch} velocity-native-build:$variant /bin/bash -c "cd /app && ./build-support/compile-linux-crypto.sh"
+    $CONTAINER_ENGINE run --rm --pull=never -v "$(pwd)":/app --platform linux/${arch} velocity-native-build:$variant-$arch /bin/bash -c "cd /app && ./build-support/compile-linux-crypto.sh"
   done
 
   for variant in "${COMPRESSION_VARIANTS[@]}"; do
     echo "Building native compression for $arch on $variant..."
-    docker run --rm -v "$(pwd)":/app --platform linux/${arch} velocity-native-build:$variant /bin/bash -c "cd /app && ./build-support/compile-linux-compress.sh"
+    $CONTAINER_ENGINE run --rm --pull=never -v "$(pwd)":/app --platform linux/${arch} velocity-native-build:$variant-$arch /bin/bash -c "cd /app && ./build-support/compile-linux-compress.sh"
   done
-done
+done