# Context: project root (needed so build.rs can access proto/)
FROM rust:slim AS builder

RUN apt-get update && apt-get install -y --no-install-recommends \
    protobuf-compiler \
    musl-tools \
    && rm -rf /var/lib/apt/lists/*

RUN rustup target add x86_64-unknown-linux-musl

WORKDIR /src

COPY proto/ ./proto/

COPY agent/Cargo.toml agent/Cargo.lock ./agent/
COPY agent/build.rs ./agent/
WORKDIR /src/agent
RUN mkdir src && echo "fn main(){}" > src/main.rs && \
    cargo build --release --target x86_64-unknown-linux-musl && \
    rm -rf src

COPY agent/src ./src
RUN touch src/main.rs && cargo build --release --target x86_64-unknown-linux-musl

# ── Runtime ───────────────────────────────────────────────────────────────────
FROM alpine:3.19

RUN apk add --no-cache ca-certificates docker-cli

COPY --from=builder /src/agent/target/x86_64-unknown-linux-musl/release/containarr-agent /usr/local/bin/containarr-agent

ENTRYPOINT ["containarr-agent"]