pamtunnel/Dockerfile.gateway-agent at main · mew-sh/pamtunnel · GitHub

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# syntax=docker/dockerfile:1
# ─────────────────────────────────────────────────────────────────────────────
# Dockerfile.gateway-agent — multi-arch build (linux/amd64 + linux/arm64)
#
# Build a single arch:
#   docker build --platform linux/amd64  -f Dockerfile.gateway-agent -t pamtunnel/gateway-agent:latest .
#   docker build --platform linux/arm64  -f Dockerfile.gateway-agent -t pamtunnel/gateway-agent:latest .
#
# Build + push multi-arch manifest (requires `docker buildx`):
#   docker buildx build --platform linux/amd64,linux/arm64 \
#       -f Dockerfile.gateway-agent -t pamtunnel/gateway-agent:latest --push .
# ─────────────────────────────────────────────────────────────────────────────

FROM --platform=$BUILDPLATFORM rust:1-slim-bookworm AS builder

ARG TARGETARCH

RUN apt-get update && apt-get install -y --no-install-recommends \
        python3-pip xz-utils \
    && pip3 install ziglang --break-system-packages \
    && cargo install cargo-zigbuild \
    && rustup target add \
        x86_64-unknown-linux-musl \
        aarch64-unknown-linux-musl \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /build

# ── Dependency-caching layer ──────────────────────────────────────────────────
COPY Cargo.toml Cargo.lock ./
COPY shared/Cargo.toml           shared/Cargo.toml
COPY vps-agent/Cargo.toml        vps-agent/Cargo.toml
COPY gateway-agent/Cargo.toml    gateway-agent/Cargo.toml

RUN mkdir -p shared/src vps-agent/src gateway-agent/src \
    && echo 'pub struct _Stub;'  > shared/src/lib.rs \
    && echo 'fn main() {}'       > vps-agent/src/main.rs \
    && echo 'fn main() {}'       > gateway-agent/src/main.rs

RUN --mount=type=cache,target=/usr/local/cargo/registry \
    --mount=type=cache,target=/build/target \
    case "$TARGETARCH" in \
        amd64) TARGET=x86_64-unknown-linux-musl  ;; \
        arm64) TARGET=aarch64-unknown-linux-musl ;; \
        *)     echo "Unsupported TARGETARCH: $TARGETARCH" >&2 && exit 1 ;; \
    esac \
    && cargo zigbuild --release --target "$TARGET" -p gateway-agent

# ── Real build ────────────────────────────────────────────────────────────────
COPY . .

RUN --mount=type=cache,target=/usr/local/cargo/registry \
    --mount=type=cache,target=/build/target \
    case "$TARGETARCH" in \
        amd64) TARGET=x86_64-unknown-linux-musl  ;; \
        arm64) TARGET=aarch64-unknown-linux-musl ;; \
    esac \
    && cargo zigbuild --release --target "$TARGET" -p gateway-agent \
    && cp "target/$TARGET/release/gateway-agent" /gateway-agent

# ── Minimal runtime image ─────────────────────────────────────────────────────
FROM scratch
COPY --from=builder /gateway-agent /gateway-agent
ENTRYPOINT ["/gateway-agent"]