build_swift_stretch.sh

#!/bin/bash

set -e
readonly VERSION="${1:-5.2.1-RELEASE}"

cd "$(dirname "$0")"

# Compiling Swift requires the SYS_PTRACE capability because Swift’s REPL uses
# it, and some tests run the REPL. Docker needs to support seccomp to be able to
# add this capability to the containers.
test "$(grep CONFIG_SECCOMP= /boot/config-$(uname -r))" = "CONFIG_SECCOMP=y" || { echo "System does not support seccomp; cannot build Swift."; exit 1; }

docker pull debian:stretch-slim
docker build --build-arg SWIFT_TAG="$VERSION" -t "swift:$VERSION" -f "context_stretch/Dockerfile" context_stretch
cat context_stretch/Dockerfile.builder.base | sed -E "s/__HPN_SWIFT_DOCKER_IMAGE_NAME__/swift:$VERSION/g" | docker build -t "swift-builder:$VERSION" -f - context_stretch

echo
echo
echo
echo "All done. You can manually tag the temporary image (e.g. name it “swift-built:$VERSION”) or delete it."
echo "To use the REPL inside a container based from the image, you’ll have to run it with --security-opt=seccomp:unconfined"