Swift Docker from scratch

Dockerfile

ARG SWIFT_VERSION="5.0.1"
# builder image
FROM swift:${SWIFT_VERSION} as builder

RUN apt-get -qq update && apt-get install -y \
    libssl-dev zlib1g-dev \
    && rm -r /var/lib/apt/lists/*

# compile application
WORKDIR /app
COPY . .
RUN mkdir -p /build/lib && cp -R /usr/lib/swift/linux/*.so* /build/lib
RUN swift build -c release && mv `swift build -c release --show-bin-path` /build/bin

# Production image
FROM scratch as Product

# copy dependecies (result of seachDeps.sh + manually added)
WORKDIR /
COPY --from=builder /usr/lib/swift/linux/libswiftCore.so /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libswiftGlibc.so /usr/lib/swift/linux/
COPY --from=builder /lib/x86_64-linux-gnu/libpthread.so.0 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libutil.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/swift/linux/libswiftDispatch.so /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libdispatch.so /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libBlocksRuntime.so /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libFoundation.so /usr/lib/swift/linux/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libssl.so.1.1 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libz.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libstdc++.so.6 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libgcc_s.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libatomic.so.1 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/swift/linux/libicui18nswift.so.61 /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libicuucswift.so.61 /usr/lib/swift/linux/
COPY --from=builder /usr/lib/swift/linux/libicudataswift.so.61 /usr/lib/swift/linux/
COPY --from=builder /lib64/ld-linux-x86-64.so.2 /lib64/
COPY --from=builder /lib/x86_64-linux-gnu/libbsd.so.0 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/librt.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libcurl.so.4 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libxml2.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libnghttp2.so.14 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libidn2.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/librtmp.so.1 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libpsl.so.5 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libldap_r-2.4.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/liblber-2.4.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libicuuc.so.60 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/liblzma.so.5 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libunistring.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libgnutls.so.30 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libhogweed.so.4 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libnettle.so.6 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libgmp.so.10 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libkrb5.so.3 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libk5crypto.so.3 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libcom_err.so.2 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libkrb5support.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libresolv.so.2 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libsasl2.so.2 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libgssapi.so.3 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libicudata.so.60 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libp11-kit.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libtasn1.so.6 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libkeyutils.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libheimntlm.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libkrb5.so.26 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libasn1.so.8 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libhcrypto.so.4 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libroken.so.18 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libffi.so.6 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libwind.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libheimbase.so.1 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libhx509.so.5 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 /usr/lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libcrypt.so.1 /lib/x86_64-linux-gnu/
COPY --from=builder /lib/x86_64-linux-gnu/libnss_dns.so.2 /lib/x86_64-linux-gnu/libnss_dns.so.2

# copy certificates
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

# copy application binary
WORKDIR /app
COPY --from=builder /build/bin/Run .

ENTRYPOINT ["./Run"]

seachDeps.sh

#!/bin/bash
BIN="$1"
OUTPUT_TAR="${2:-dep_libs.tar.gz}"
DEPS=$(ldd $BIN | awk 'BEGIN{ORS=" "}$1\
  ~/^\//{print $1}$3~/^\//{print $3}'\
  | sed 's/,$/\n/')
echo $DEPS

based on: https://medium.com/@jjacobson/a-minimal-swift-docker-image-b93d2bc1ce3c