docker-entrypoint.sh

#!/bin/sh

if [ "$#" = "0" ]; then
	echo "Commands: "
	ls -1 /wuffs | sed 's/^example-//'
	exit 1
fi

CMD="$1"
shift

exec "/wuffs/example-$CMD" "$@"

Dockerfile

FROM debian:stable-slim AS builder

RUN APT_FRONTEND=non-interactive apt-get update && apt-get install -y curl \
&& curl -sSL -o /tmp/go.tar.gz https://go.dev/dl/go1.20.4.linux-amd64.tar.gz \
&& tar -C /usr/local -xzf /tmp/go.tar.gz
ENV PATH $PATH:/usr/local/go/bin:/root/go/bin
ENV CGO_ENABLED 1

RUN APT_FRONTEND=non-interactive apt-get install -y build-essential pkg-config clang \
liblz4-dev zlib1g-dev libzstd-dev libdeflate-dev libpng-dev libgif-dev libbz2-dev \
libxcb-render0-dev libxcb-render-util0-dev libxcb-image0-dev libxcb1-dev \
libsdl2-dev libsdl2-image-dev

RUN mkdir /wuffs
WORKDIR /wuffs
COPY . /wuffs/
RUN ./build-all.sh

FROM debian:stable-slim

RUN mkdir /wuffs
COPY --from=builder /wuffs/gen/bin/example-* /wuffs/
COPY --chmod=755 docker-entrypoint.sh /

ENTRYPOINT [ "/docker-entrypoint.sh" ]