ARG DOCKER_GEN_VERSION=main

# Build docker-gen from scratch

FROM --platform=$BUILDPLATFORM golang:1.27.1 AS go-builder

ENV CGO_ENABLED=0

ARG DOCKER_GEN_VERSION TARGETOS TARGETARCH TARGETVARIANT

ENV GOOS=$TARGETOS GOARCH=$TARGETARCH VARIANT=$TARGETVARIANT

WORKDIR /build

# Install the dependencies

COPY . .

RUN go mod download

# Build the docker-gen executable

RUN set -eux; \

case "$GOARCH" in \

arm) export GOARM="${VARIANT#v}" ;; \

amd64) export GOAMD64="$VARIANT" ;; \

*) [ -z "$VARIANT" ] ;; \

esac; \

go env | grep -E 'OS=|ARCH=|ARM=|AMD64='; \

go build -ldflags "-X main.buildVersion=${DOCKER_GEN_VERSION}" -o docker-gen ./cmd/docker-gen

FROM debian:13.7-slim

ARG DOCKER_GEN_VERSION

ENV DOCKER_GEN_VERSION=${DOCKER_GEN_VERSION} \

DOCKER_HOST=unix:///tmp/docker.sock

# Install packages required by the image

RUN apt-get update \

&& apt-get install -y -q --no-install-recommends openssl \

&& apt-get clean \

&& rm -r /var/lib/apt/lists/*

# Copy the entrypoint script

COPY /app/docker-entrypoint.sh /app/docker-entrypoint.sh

# Install docker-gen from build stage

COPY --from=go-builder /build/docker-gen /usr/local/bin/docker-gen

# Copy the license

COPY LICENSE /usr/local/share/doc/docker-gen/

ENTRYPOINT ["/app/docker-entrypoint.sh"]