# Dockerfile for creating statically-linked Rust applications.
# See: https://www.artificialworlds.net/blog/2020/04/22/creating-a-tiny-docker-image-of-a-rust-project/
# See: https://alexbrand.dev/post/how-to-package-rust-applications-into-minimal-docker-containers/

# 1: Build the exe
FROM rust:1.57 as builder
WORKDIR /usr/src

# 1a: Prepare for static linking
RUN apt-get update && \
    apt-get dist-upgrade -y && \
    apt-get install -y musl-tools && \
    rustup target add x86_64-unknown-linux-musl

# 1b: Download and compile Rust dependencies (and store as a separate Docker layer)
RUN USER=root cargo new markdown-extract
WORKDIR /usr/src/markdown-extract
COPY Cargo.toml Cargo.lock ./
COPY src ./src
RUN cargo install --target x86_64-unknown-linux-musl --path .

# 2: Copy the exe and extra files ("static") to an empty Docker image
FROM scratch
COPY --from=builder /usr/local/cargo/bin/markdown-extract .
# COPY static .
USER 1000
ENTRYPOINT ["./markdown-extract"]