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# syntax=docker/dockerfile:1
# ALPINE_VERSION sets the version of the alpine base image to use.
# It must be a supported tag in the docker.io/library/alpine image repository.
ARG ALPINE_VERSION=3.21
FROM alpine:${ALPINE_VERSION} AS gen
RUN apk add --no-cache bash git
WORKDIR /src
RUN --mount=type=bind,target=. \
mkdir /out && ./scripts/docs/generate-authors.sh /out
FROM scratch AS update
COPY --from=gen /out /
FROM gen AS validate
RUN --mount=type=bind,target=.,rw <<EOT
set -e
git add -A
cp -rf /out/* .
diff=$(git status --porcelain -- AUTHORS)
if [ -n "$diff" ]; then
echo >&2 'ERROR: Authors result differs. Update with "make -f docker.Makefile authors"'
echo "$diff"
exit 1
fi
EOT
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