FROM rust:1.91-alpine AS builder
# Docker provides these automatically based on --platform
ARG TARGETARCH
RUN apk add --no-cache musl-dev
# Set Rust target based on architecture and target for static linking
RUN case "${TARGETARCH}" in \
amd64) echo "x86_64-unknown-linux-musl" > /rust-target ;; \
arm64) echo "aarch64-unknown-linux-musl" > /rust-target ;; \
*) echo "Unsupported architecture: ${TARGETARCH}" && exit 1 ;; \
esac \
&& rustup target add "$(cat /rust-target)"
WORKDIR /build
COPY Cargo.toml Cargo.lock ./
COPY src ./src
RUN cargo build --release --target "$(cat /rust-target)" \
&& mv "target/$(cat /rust-target)/release/mdlint" /mdlint
# Runtime stage
FROM scratch
COPY --from=builder /mdlint /usr/local/bin/mdlint
ENTRYPOINT ["/usr/local/bin/mdlint"]
CMD ["--help"]