Build fully statically linked rust-analyzer (docker-based)

Dockerfile

@@ -0,0 +1,43 @@
+FROM debian:stretch as base
+USER root
+RUN apt-get update && \
+    apt-get install -y \
+      musl-dev musl-tools file nano git zlib1g-dev cmake make g++ curl pkgconf \
+      linux-headers-amd64 ca-certificates xutils-dev \
+      --no-install-recommends && \
+    rm -rf /var/lib/apt/lists/*
+ENV MUSL_PREFIX=/musl
+RUN mkdir /workdir && mkdir $MUSL_PREFIX
+WORKDIR /libworkdir
+RUN ln -s /usr/include/x86_64-linux-gnu/asm /usr/include/x86_64-linux-musl/asm && \
+    ln -s /usr/include/asm-generic /usr/include/x86_64-linux-musl/asm-generic && \
+    ln -s /usr/include/linux /usr/include/x86_64-linux-musl/linux
+RUN curl -sL https://zlib.net/zlib-1.2.11.tar.gz | tar xz
+RUN cd zlib-1.2.11 && \
+    CC="musl-gcc -fPIE -pie" LDFLAGS="-L/musl/lib/" CFLAGS="-I/musl/include" \
+      ./configure --prefix=$MUSL_PREFIX && \
+    make -j$(nproc) && \
+    make install
+
+FROM base as rust-base
+ARG RUST_VER=1.43.0
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y  --default-toolchain ${RUST_VER}
+ENV PATH=/root/.cargo/bin:$PATH
+RUN cargo install cargo-tree
+RUN rustup target add x86_64-unknown-linux-musl
+ENV PATH=$MUSL_PREFIX/bin:$PATH \
+    PKG_CONFIG_ALLOW_CROSS=true \
+    PKG_CONFIG_ALL_STATIC=true \
+    PKG_CONFIG_PATH=$MUSL_PREFIX/lib/pkgconfig \
+    SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt \
+    SSL_CERT_DIR=/etc/ssl/certs \
+    LIBZ_SYS_STATIC=1
+WORKDIR /workdir
+
+FROM rust-base as builder
+ADD . /workdir
+RUN PKG_CONFIG_ALLOW_CROSS=1 cargo build --release --target x86_64-unknown-linux-musl
+
+FROM alpine:3.11.3
+COPY --from=builder /workdir/target/x86_64-unknown-linux-musl/release/rust-analyzer /usr/local/bin/
+ENTRYPOINT ["rust-analyzer"]

build.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+docker build -t rust-analyzer .
+
+# extract it
+id=$(docker create rust-analyzer)
+docker cp $id:/usr/local/bin/rust-analyzer ./
+docker rm -v $id