Dockerfile

# syntax=docker/dockerfile:1@sha256:fe40cf4e92cd0c467be2cfc30657a680ae2398318afd50b0c80585784c604f28

# xx is a helper for cross-compilation
FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.4.0@sha256:0cd3f05c72d6c9b038eb135f91376ee1169ef3a330d34e418e65e2a5c2e9c0d4 AS xx

FROM --platform=$BUILDPLATFORM golang:1.24.1-bullseye@sha256:aa106963247f64275bd459b6b713978f1633160da53f58115922964ab0b9eae7 AS builder

COPY --link --from=xx / /

ARG TARGETPLATFORM

RUN --mount=type=cache,id=${TARGETPLATFORM}-apt,target=/var/cache/apt,sharing=locked \
    apt-get update \
    && xx-apt-get install -y --no-install-recommends \
      gcc \
      libc6-dev

WORKDIR /build/cli

RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=bind,source=.,target=/build,ro \
    xx-go mod download -x

ARG BUILD_OPTS
ARG EXTRA_LDFLAGS

ENV CGO_ENABLED=1

RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=bind,source=.,target=/build,ro \
    xx-go build ${BUILD_OPTS} -ldflags="-s -w -extldflags -static ${EXTRA_LDFLAGS}" \
    -o /bin/dirctl ./cli.go

RUN xx-verify /bin/dirctl

FROM alpine:3.20@sha256:beefdbd8a1da6d2915566fde36db9db0b524eb737fc57cd1367effd16dc0d06d

RUN apk add --update --no-cache \
    ca-certificates \
    libc6-compat

COPY --from=builder ["/bin/dirctl", "/bin/dirctl"]

ENTRYPOINT ["/bin/dirctl"]