Dockerfile

ARG GO_VERSION=1.22.0
ARG GCLOUD_SDK_VERSION=489.0.0
FROM golang:${GO_VERSION}-bullseye as builder

LABEL maintainer="dipjyotimetia"
LABEL version="3.0"
LABEL description="This is a custom image for GCP Pubsub Emulator"
LABEL repository="https://github.com/dipjyotimetia/pubsub-emulator"

ENV PUBSUB_PROJECT ${PUBSUB_PROJECT}
ENV PUBSUB_TOPIC ${PUBSUB_TOPIC}
ENV PUBSUB_SUBSCRIPTION ${PUBSUB_SUBSCRIPTION}
ENV PUBSUB_EMULATOR_HOST ${PUBSUB_PORT}

RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

RUN curl -s https://raw.githubusercontent.com/eficode/wait-for/master/wait-for -o /usr/bin/wait-for
RUN chmod +x /usr/bin/wait-for

WORKDIR /build

ENV GO111MODULE=on

COPY go.mod go.sum main.go ./

RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download

RUN --mount=type=cache,target=/go/pkg/mod \
    CGO_ENABLED=0 GOOS=linux go build .

FROM google/cloud-sdk:${GCLOUD_SDK_VERSION}-emulators

COPY --from=builder /usr/bin/wait-for /usr/bin
COPY --from=builder /build/pubsub-emulator /usr/bin
COPY run.sh /run.sh

RUN apt-get update && apt-get install -y --no-install-recommends \
    netcat-openbsd \
    bash \
    openjdk-17-jre-headless \
    && rm -rf /var/lib/apt/lists/*

EXPOSE ${PUBSUB_PORT}

RUN chmod +x /run.sh

ENTRYPOINT [ "sh", "/run.sh"]