lemmy/docker/Dockerfile.multiarch

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# FIXME: use "--platform=$BUILDPLATFORM" and solve openssl cross-compile issue
FROM rust:1.67.0-alpine as builder
# Install build dependencies
RUN apk add --no-cache git openssl-dev libpq-dev musl-dev
# Set the working directory to /app and copy the source code
WORKDIR /app
COPY . .
# Set the target architecture (can be set using --build-arg), buildx set it automatically
ARG TARGETARCH
# This can be set to release using --build-arg
ARG RUST_RELEASE_MODE="debug"
# Prepare toolchain
# Docker and Rust use different architecture naming schemas, so we have to convert them
RUN case $TARGETARCH in \
arm64) RUSTARCH=aarch64 ;; \
amd64) RUSTARCH=x86_64 ;; \
*) echo "unsupported architecture: $TARGETARCH"; exit 3 ;; \
esac \
&& echo "RUSTARCH=$RUSTARCH" >> .buildenv
# Debug mode build
RUN --mount=type=cache,target=/app/target \
if [ "$RUST_RELEASE_MODE" = "debug" ]; then \
source .buildenv \
&& echo "pub const VERSION: &str = \"$(git describe --tag)\";" > "crates/utils/src/version.rs" \
&& rustup target add ${RUSTARCH}-unknown-linux-musl \
&& cargo build --target ${RUSTARCH}-unknown-linux-musl \
&& cp ./target/${RUSTARCH}-unknown-linux-musl/${RUST_RELEASE_MODE}/lemmy_server /app/lemmy_server; \
fi
# Release mode build
RUN \
if [ "$RUST_RELEASE_MODE" = "release" ]; then \
source .buildenv \
&& rustup target add ${RUSTARCH}-unknown-linux-musl \
&& cargo build --target ${RUSTARCH}-unknown-linux-musl --release \
&& cp ./target/${RUSTARCH}-unknown-linux-musl/${RUST_RELEASE_MODE}/lemmy_server /app/lemmy_server; \
fi
# The Alpine runner
FROM alpine:3 as lemmy
# Install libpq for Postgres
RUN apk add --no-cache ca-certificates libpq
# Copy resources
COPY --from=builder /app/lemmy_server /app/lemmy
EXPOSE 8536
CMD ["/app/lemmy"]