Dockerfile

# docker buildx build --platform linux/arm64 --target binary --output type=local,dest=$(pwd)/target/docker .

FROM --platform=$BUILDPLATFORM rust:1-bookworm AS vendor

ENV USER=root

WORKDIR /code
RUN cargo init --bin --name git-metrics /code
COPY Cargo.lock Cargo.toml /code/

# https://docs.docker.com/engine/reference/builder/#run---mounttypecache
RUN --mount=type=cache,target=$CARGO_HOME/git,sharing=locked \
    --mount=type=cache,target=$CARGO_HOME/registry,sharing=locked \
    mkdir -p /code/.cargo \
    && cargo vendor >> /code/.cargo/config.toml

FROM rust:1-bookworm AS base-builder

RUN apt-get update \
    && apt-get install -y git \
    && rm -rf /var/lib/apt/lists

RUN cargo install cargo-deb

FROM base-builder AS builder

ENV USER=root

WORKDIR /code

COPY Cargo.toml /code/Cargo.toml
COPY Cargo.lock /code/Cargo.lock
COPY src /code/src
COPY LICENSE /code/LICENSE
COPY --from=vendor /code/.cargo /code/.cargo
COPY --from=vendor /code/vendor /code/vendor

RUN --mount=type=cache,target=/code/target/release/deps,sharing=locked \
    --mount=type=cache,target=/code/target/release/build,sharing=locked \
    --mount=type=cache,target=/code/target/release/incremental,sharing=locked \
    cargo build --release --offline

RUN strip /code/target/release/git-metrics
RUN cargo deb --no-build

FROM scratch AS binary

COPY --from=builder /code/target/release/git-metrics /git-metrics
COPY --from=builder /code/target/debian/*.deb /