ci: use ubuntu 20.04 for building snaps (#18)

azure-pipelines.yml

@@ -56,3 +56,11 @@ jobs:
  - template: build.yml
  parameters:
  arch: buster-armhf
+
+- job: snapcraft_x64
+ pool:
+ vmImage: 'ubuntu-latest'
+ steps:
+ - template: build.yml
+ parameters:
+ arch: snapcraft-x64

snapcraft-x64/Dockerfile

@@ -0,0 +1,71 @@
+ARG RISK=stable
+ARG REPO=mcr.microsoft.com/mirror/docker/library/ubuntu
+ARG TAG=20.04
+
+FROM ${REPO}:${TAG} as builder
+ARG RISK
+ARG REPO
+ARG TAG
+RUN echo "Building snapcraft:$RISK in $REPO:$TAG"
+
+# Grab dependencies
+RUN apt-get update
+RUN apt-get dist-upgrade --yes
+RUN apt-get install --yes \
+ curl \
+ jq \
+ squashfs-tools \
+ git \
+ build-essential \
+ autoconf
+
+# Grab the core20 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/core20' | jq '.download_url' -r) --output core20.snap
+RUN mkdir -p /snap/core20
+RUN unsquashfs -d /snap/core20/current core20.snap
+
+# Grab the snapcraft snap from the $RISK channel and unpack it in the proper
+# place.
+RUN curl -L $(curl -H 'X-Ubuntu-Series: 16' 'https://api.snapcraft.io/api/v1/snaps/details/snapcraft?channel='$RISK | jq '.download_url' -r) --output snapcraft.snap
+RUN mkdir -p /snap/snapcraft
+RUN unsquashfs -d /snap/snapcraft/current snapcraft.snap
+
+# Fix Python3 installation: Make sure we use the interpreter from
+# the snapcraft snap:
+RUN unlink /snap/snapcraft/current/usr/bin/python3
+RUN ln -s /snap/snapcraft/current/usr/bin/python3.* /snap/snapcraft/current/usr/bin/python3
+RUN echo /snap/snapcraft/current/lib/python3.*/site-packages >> /snap/snapcraft/current/usr/lib/python3/dist-packages/site-packages.pth
+RUN /snap/snapcraft/current/usr/bin/python3 /snap/snapcraft/current/usr/bin/pip3 install -U setuptools
+
+# 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 $2}' /snap/snapcraft/current/meta/snap.yaml | tr -d \')" && echo "export SNAP_VERSION=\"$snap_version\"" >> /snap/bin/snapcraft
+RUN echo 'exec "$SNAP/usr/bin/python3" "$SNAP/bin/snapcraft" "$@"' >> /snap/bin/snapcraft
+RUN chmod +x /snap/bin/snapcraft
+
+# Build patchelf
+RUN git clone https:/NixOS/patchelf
+RUN cd patchelf && ./bootstrap.sh && ./configure && make && make check && cp ./src/patchelf /snap/bin/patchelf
+
+# Multi-stage build, only need the snaps from the builder. Copy them one at a
+# time so they can be cached.
+FROM ${REPO}:${TAG}
+COPY --from=builder /snap/core20 /snap/core20
+COPY --from=builder /snap/snapcraft /snap/snapcraft
+COPY --from=builder /snap/bin/snapcraft /snap/bin/snapcraft
+COPY --from=builder /snap/bin/patchelf /snap/bin/patchelf
+
+# Generate locale and install dependencies.
+RUN apt-get update && apt-get install --yes snapd 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 SNAP="/snap/snapcraft/current"
+ENV SNAP_NAME="snapcraft"
+ENV SNAP_ARCH="amd64"
+ENV PATH="/snap/bin:/snap/snapcraft/current/usr/bin:$PATH"