# syntax=docker/dockerfile:1

ARG GO_VERSION=1.26.3

# ALPINE_VERSION sets the version of the alpine base image to use, including for the golang image.
# It must be a supported tag in the docker.io/library/alpine image repository
# that's also available as alpine image variant for the Golang version used.
ARG ALPINE_VERSION=3.23
ARG MODOUTDATED_VERSION=v0.8.0

FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS base
ENV GOTOOLCHAIN=local
RUN apk add --no-cache bash git rsync
WORKDIR /src

FROM base AS vendored
ENV GOPROXY=https://proxy.golang.org|direct
RUN --mount=target=/context \
    --mount=target=.,type=tmpfs  \
    --mount=target=/go/pkg/mod,type=cache <<EOT
set -e
rsync -a /context/. .
./scripts/with-go-mod.sh ./scripts/vendor update
mkdir /out
cp -r vendor.mod vendor.sum vendor /out
EOT

FROM scratch AS update
COPY --from=vendored /out /out

FROM vendored AS validate
RUN --mount=target=/context \
    --mount=target=.,type=tmpfs <<EOT
set -e
rsync -a /context/. .
git add -A
rm -rf vendor
cp -rf /out/* .
./scripts/with-go-mod.sh ./scripts/vendor validate
EOT

FROM psampaz/go-mod-outdated:${MODOUTDATED_VERSION} AS go-mod-outdated
FROM base AS outdated
RUN --mount=target=.,rw \
    --mount=target=/go/pkg/mod,type=cache \
    --mount=from=go-mod-outdated,source=/home/go-mod-outdated,target=/usr/bin/go-mod-outdated \
    ./scripts/with-go-mod.sh ./scripts/vendor outdated
