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+# It's difficult to install snapcraft (the packaging tool) on a non-snap
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+# distribution such as Debian without running snapd (which doesn't work under
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+# Docker). We cheat by taking their Docker image and snarfing the resulting
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+# binaries.
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+FROM snapcore/snapcraft AS snapcraft
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+
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+# Otherwise we base on the Go image, which is Debian based.
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+FROM golang
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+
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+# The snap stuff, as mentioned, with variables set to let the snapcraft snap play ball
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+COPY --from=snapcraft /snap /snap
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+ENV LANG="en_US.UTF-8"
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+ENV LANGUAGE="en_US:en"
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+ENV LC_ALL="en_US.UTF-8"
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+ENV SNAP="/snap/snapcraft/current"
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+ENV SNAP_NAME="snapcraft"
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+ENV SNAP_ARCH="amd64"
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+ENV PATH="$PATH:/snap/bin"
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+
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+# FPM to build Debian packages
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+RUN apt-get update && apt-get install -y --no-install-recommends \
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+ locales rubygems ruby-dev \
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+ && apt-get clean \
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+ && rm -rf /var/lib/apt/lists/* \
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+ && gem install --no-ri --no-rdoc fpm \
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+ && locale-gen en_US.UTF-8
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Jakob Borg