# SPDX-License-Identifier: MIT
# Copyright (C) 2026 Bryan Joshua Pedini

FROM golang:1.26-alpine AS build
RUN apk add --no-cache git ca-certificates
ARG COREDNS_VERSION
RUN test -n "$COREDNS_VERSION"
RUN git clone --depth 1 --branch "v${COREDNS_VERSION}" https://github.com/coredns/coredns.git /src
WORKDIR /src
RUN sed -i '/^file:file$/i mysql:github.com/cloud66-oss/coredns_mysql' plugin.cfg
ARG MYSQL_PLUGIN_REV
RUN test -n "$MYSQL_PLUGIN_REV"
RUN go get "github.com/cloud66-oss/coredns_mysql@${MYSQL_PLUGIN_REV}"
RUN go generate
RUN CGO_ENABLED=0 go build -trimpath -ldflags='-s -w' -o /coredns .

FROM scratch
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=build /coredns /coredns
EXPOSE 53 53/udp
ENTRYPOINT ["/coredns"]