Example rust dockerfile

Dockerfile

# syntax=docker/dockerfile:1.6

FROM debian:bullseye-slim AS base
RUN apt-get update && apt install -y pkg-config libssl-dev openssl ca-certificates

FROM rustlang/rust:nightly-bullseye-slim@sha256:e2d04393a78619a97bc8c9d19da15685d3df61d09b5036b0e00759c40c938afe as build
RUN apt-get update && apt install -y pkg-config libssl-dev openssl ca-certificates
WORKDIR /usr/src/app

RUN <<EOF
set -e
USER=root cargo new myapp --bin
USER=root cargo new myapp-core --lib
USER=root cargo new myapp-shared-types --lib
EOF

COPY ./Cargo.toml .
COPY ./Cargo.lock .
COPY ./myapp/Cargo.toml ./myapp/Cargo.toml
COPY ./myapp-core/Cargo.toml ./myapp-core/Cargo.toml
COPY ./myapp-shared-types/Cargo.toml ./myapp-shared-types/Cargo.toml

RUN RUSTFLAGS="-C target-cpu=x86-64-v3 -C target-feature=+adx,+aes,+avx,+avx2,+bmi1,+bmi2,+cmpxchg16b,+f16c,+fma,+fxsr,+gfni,+lzcnt,+movbe,+pclmulqdq,+popcnt,+rdrand,+rdseed,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+vaes,+vpclmulqdq,+xsave,+xsavec,+xsaveopt" cargo build --profile release-lto

COPY ./myapp ./myapp
COPY ./myapp-core ./myapp-core
COPY ./myapp-shared-types ./myapp-shared-types

# https://users.rust-lang.org/t/dockerfile-with-cached-dependencies-does-not-recompile-the-main-rs-file/21577
RUN <<EOF
set -e
touch ./myapp/src/main.rs
touch ./myapp-core/src/lib.rs
touch ./myapp-shared-types/src/lib.rs
RUSTFLAGS="-C target-cpu=x86-64-v3 -C target-feature=+adx,+aes,+avx,+avx2,+bmi1,+bmi2,+cmpxchg16b,+f16c,+fma,+fxsr,+gfni,+lzcnt,+movbe,+pclmulqdq,+popcnt,+rdrand,+rdseed,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+vaes,+vpclmulqdq,+xsave,+xsavec,+xsaveopt" cargo build --profile release-lto
EOF

FROM base AS final
WORKDIR /app
COPY --from=build /usr/src/app/target/release-lto/myapp .
ENV RUST_BACKTRACE=full
ENTRYPOINT ["/app/myapp"]