Rust: build wasm32-wasi binaries through ad-hoc docker

waskid.sh

#!/usr/bin/env bash

set -e

echo '
FROM ubuntu:18.04
RUN apt-get update && \
    export DEBIAN_FRONTEND=noninteractive && \
    apt-get install -yq \
        build-essential \
        clang \
        cmake \
        curl \
        emscripten \
        file \
        git \
        sudo \
        && \
    apt-get clean && rm -rf /var/lib/apt/lists/* && \
    useradd rust --user-group --create-home --shell /bin/bash --groups sudo && \
    echo "%sudo   ALL=(ALL:ALL) NOPASSWD:ALL" >/etc/sudoers.d/nopasswd
USER rust
ENV PATH=/home/rust/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable --profile minimal --no-modify-path && \
    rustup target add wasm32-wasi && \
    rustup target add wasm32-unknown-emscripten
WORKDIR /home/rust/src
' | docker build -t rust-wasi-builder -

exec docker run --rm -ti \
	-e http_proxy="${docker_http_proxy:-${http_proxy:-}}" \
	-e https_proxy="${docker_https_proxy:-${https_proxy:-}}" \
	-v $PWD:/home/rust/src \
	-v $PWD/wasm-target:/home/rust/src/target \
	-v $PWD/wasm-cache:/home/rust/.cargo/registry \
	rust-wasi-builder bash -c '
		sudo chown rust:rust target ~/.cargo/registry \
		&& env CARGO_NET_GIT_FETCH_WITH_CLI=true cargo build -vvv --release --locked --target=wasm32-wasi
	'