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forslund/Dockerfile.snapcraft

Created April 24, 2020 09:23
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  1. forslund created this gist Apr 24, 2020.
    53 changes: 53 additions & 0 deletions Dockerfile.snapcraft
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    FROM ubuntu:xenial as builder

    # Grab dependencies
    RUN apt-get update && apt-get dist-upgrade --yes && apt-get install --yes \
    curl \
    jq \
    squashfs-tools

    # Grab the core snap (for backwards compatibility) from the stable channel and
    # unpack it in the proper place.
    RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/core' | jq '.download_url' -r) --output core.snap
    RUN mkdir -p /snap/core
    RUN unsquashfs -d /snap/core/current core.snap

    # Grab the core18 snap (which snapcraft uses as a base) from the stable channel
    # and unpack it in the proper place.
    RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/core18' | jq '.download_url' -r) --output core18.snap
    RUN mkdir -p /snap/core18
    RUN unsquashfs -d /snap/core18/current core18.snap

    # Grab the snapcraft snap from the candidate channel and unpack it in the proper
    # place.
    RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/snapcraft?channel=candidate' | jq '.download_url' -r) --output snapcraft.snap
    RUN mkdir -p /snap/snapcraft
    RUN unsquashfs -d /snap/snapcraft/current snapcraft.snap

    # Create a snapcraft runner (TODO: move version detection to the core of
    # snapcraft).
    RUN mkdir -p /snap/bin
    RUN echo "#!/bin/sh" > /snap/bin/snapcraft
    RUN snap_version="$(awk '/^version:/{print $2}' /snap/snapcraft/current/meta/snap.yaml)" && echo "export SNAP_VERSION=\"$snap_version\"" >> /snap/bin/snapcraft
    RUN echo 'exec "$SNAP/usr/bin/python3" "$SNAP/bin/snapcraft" "$@"' >> /snap/bin/snapcraft
    RUN chmod +x /snap/bin/snapcraft

    # Multi-stage build, only need the snaps from the builder. Copy them one at a
    # time so they can be cached.
    FROM ubuntu:xenial
    COPY --from=builder /snap/core /snap/core
    COPY --from=builder /snap/core18 /snap/core18
    COPY --from=builder /snap/snapcraft /snap/snapcraft
    COPY --from=builder /snap/bin/snapcraft /snap/bin/snapcraft

    # Generate locale
    RUN apt-get update && apt-get dist-upgrade --yes && apt-get install --yes sudo locales && locale-gen en_US.UTF-8

    # Set the proper environment
    ENV LANG="en_US.UTF-8"
    ENV LANGUAGE="en_US:en"
    ENV LC_ALL="en_US.UTF-8"
    ENV PATH="/snap/bin:$PATH"
    ENV SNAP="/snap/snapcraft/current"
    ENV SNAP_NAME="snapcraft"
    ENV SNAP_ARCH="amd64"