Dockerfile.cpu

# Dockerfile.cpu
# CPU-only build - smallest, fastest, runs everywhere
#
# Build:
#   docker build -f Dockerfile.cpu -t longbow:cpu .
#
# Build with io_uring (Linux 5.1+):
#   docker build -f Dockerfile.cpu -t longbow:cpu-iouring . --build-arg ENABLE_IOURING=true

# -------------------------------------------------------------------
# Stage 1: Build
# -------------------------------------------------------------------
FROM golang:1.26.3-bookworm AS builder

WORKDIR /app

COPY go.mod go.sum ./
RUN go mod download

COPY . .

ARG ENABLE_IOURING=false
ARG BUILD_TAGS=linux
ENV GOAMD64=v3

# Build longbow, longbow-cli, and bench-tool
RUN if [ "$ENABLE_IOURING" = "true" ]; then \
    CGO_ENABLED=1 go build -tags="${BUILD_TAGS},iouring" -ldflags="-s -w -checklinkname=0" -o longbow ./cmd/longbow; \
else \
    CGO_ENABLED=0 go build -tags=${BUILD_TAGS} -ldflags="-s -w" -o longbow ./cmd/longbow; \
fi
RUN CGO_ENABLED=0 go build -tags=${BUILD_TAGS} -ldflags="-s -w" -o longbow-cli ./cmd/cli
RUN CGO_ENABLED=0 go build -tags=${BUILD_TAGS} -ldflags="-s -w" -o bench-tool ./cmd/bench-tool

# -------------------------------------------------------------------
# Stage 2: Minimal runtime
# -------------------------------------------------------------------
FROM scratch

COPY --from=builder /app/longbow /longbow
COPY --from=builder /app/longbow-cli /longbow-cli
COPY --from=builder /app/bench-tool /bench-tool

VOLUME /data

ENV LONGBOW_GPU_ENABLED=false
ENV LONGBOW_STORAGE_USE_IOURING=false
ENV GOGC=75

EXPOSE 3000 3001 9090

ENTRYPOINT ["/longbow"]