buildkit/hack/dockerfiles/vendor.Dockerfile

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# syntax = docker/dockerfile:1.2
FROM golang:1.16-alpine AS vendored
RUN apk add --no-cache git
WORKDIR /src
RUN --mount=target=/src,rw \
--mount=target=/go/pkg/mod,type=cache \
go mod tidy && go mod vendor && \
mkdir /out && cp -r go.mod go.sum vendor /out
FROM scratch AS update
COPY --from=vendored /out /out
FROM vendored AS validate
RUN --mount=target=.,rw \
git add -A && \
rm -rf vendor && \
cp -rf /out/* . && \
./hack/validate-vendor check