CI: build snap package in Gitlab CI

Scripts from
nblockchain/fsx@1db76de

.gitlab-ci.yml

@@ -90,26 +90,23 @@ newmono_test_integration:
       make &&
       make update-servers
 
-# snap package generation is not working with GitLabCI; TODO: report bug
-#stockoldmono_package:
-#  image: ubuntu:18.04
-#  stage: package
-#  script:
-#    - ./scripts/install_mono_from_microsoft_deb_packages.sh
-#
-#    - apt install -y sudo
-#    - ./scripts/install_snapcraft_dockerless.sh
-#    # finish installation of snapcraft
-#    - export SNAP=/snap/snapcraft/current
-#    - export SNAP_NAME=snapcraft
-#    - export SNAP_ARCH=amd64
-#    - export PATH="/snap/bin:$PATH"
-#
-#    - /snap/bin/snapcraft --version
-#
-#    - ./scripts/snap_build.sh
-#
-#  artifacts:
-#    paths:
-#      - gwallet*.snap
-#    expire_in: 50days
+stockmono_snap:
+  image: ubuntu:20.04
+  stage: package
+
+  variables:
+    # Fixes:
+    # "Cannot connect to the Docker daemon. Is the docker daemon running on this host?"
+    DOCKER_HOST: tcp://docker:2375
+  services:
+    # To support docker-in-docker
+    - docker:dind
+
+  script:
+    - ./scripts/snap_build_as_docker.sh
+
+  artifacts:
+    paths:
+      - "*.snap"
+    expire_in: 50days
+

scripts/snap_build_as_docker.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -euxo pipefail
+
+# Update system
+apt update -y
+
+# Install dependencies
+apt install lsb-release docker.io -y
+
+# Install snap and snapcraft
+./scripts/snap_install_as_docker.sh
+
+# Build repo from source inside snappy container
+docker exec snappy ./configure.sh --prefix=./staging
+docker exec snappy make
+docker exec snappy make install
+
+# Install snapcraft and dependencies
+docker exec snappy snap version
+docker exec snappy snap install core20
+docker exec snappy snap install --classic --stable snapcraft
+docker exec snappy snapcraft --version
+
+# Build snap package
+docker exec snappy snapcraft --destructive-mode
+
+# Copy built files from container to host to get the .snap package
+#
+# Make sure to keep /. at the end of the source directory
+# This way docker will copy the directory contents
+# instead of the entire directory into the destination directoy.
+#
+# This method has to be used because `docker cp` does not support
+# wildcards (*) in directory paths.
+# The name of the .snap package depends on the version so it changes
+# and cannot be hardcoded. 
+docker cp snappy:/geewallet/. $(pwd)

scripts/snap_install_as_docker.sh

@@ -0,0 +1,136 @@
+#!/usr/bin/env bash
+set -euxo pipefail
+
+CONTNAME=snappy
+IMGNAME=snapd
+RELEASE=20.04
+
+SUDO=""
+if [ -z "$(id -Gn|grep docker)" ] && [ "$(id -u)" != "0" ]; then
+    SUDO="sudo"
+fi
+
+if [ "$(which docker)" = "/snap/bin/docker" ]; then
+    export TMPDIR="$(readlink -f ~/snap/docker/current)"
+    # we need to run the snap once to have $SNAP_USER_DATA created
+    /snap/bin/docker >/dev/null 2>&1
+fi
+
+BUILDDIR=$(mktemp -d)
+# Copy repo contents to build dir
+$SUDO cp -r $(pwd) $BUILDDIR/geewallet
+
+usage() {
+    echo "usage: $(basename $0) [options]"
+    echo
+    echo "  -c|--containername <name> (default: snappy)"
+    echo "  -i|--imagename <name> (default: snapd)"
+    rm_builddir
+}
+
+print_info() {
+    echo
+    echo "use: $SUDO docker exec -it $CONTNAME <command> ... to run a command inside this container"
+    echo
+    echo "to remove the container use: $SUDO docker rm -f $CONTNAME"
+    echo "to remove the related image use: $SUDO docker rmi $IMGNAME"
+}
+
+clean_up() {
+    sleep 1
+    $SUDO docker rm -f $CONTNAME >/dev/null 2>&1 || true
+    $SUDO docker rmi $IMGNAME >/dev/null 2>&1 || true
+    $SUDO docker rmi $($SUDO docker images -f "dangling=true" -q) >/dev/null 2>&1 || true
+    rm_builddir
+}
+
+rm_builddir() {
+    rm -rf $BUILDDIR || true
+    exit 0
+}
+
+trap clean_up 1 2 3 4 9 15
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        -c|--containername)
+            [ -n "$2" ] && CONTNAME=$2 shift || usage
+            ;;
+        -i|--imagename)
+            [ -n "$2" ] && IMGNAME=$2 shift || usage
+            ;;
+        -h|--help)
+            usage
+            ;;
+        *)
+            usage
+            ;;
+    esac
+    shift
+done
+
+if [ -n "$($SUDO docker ps -f name=$CONTNAME -q)" ]; then
+    echo "Container $CONTNAME already running!"
+    print_info
+    rm_builddir
+fi
+
+if [ -z "$($SUDO docker images|grep $IMGNAME)" ]; then
+    cat << EOF > $BUILDDIR/Dockerfile
+FROM ubuntu:$RELEASE
+ENV container docker
+ENV PATH "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+RUN apt update &&\
+ DEBIAN_FRONTEND=noninteractive\
+ apt install -y fuse snapd snap-confine squashfuse sudo init lsb-release git docker.io fsharp build-essential pkg-config cli-common-dev mono-devel &&\
+ apt clean &&\
+ dpkg-divert --local --rename --add /sbin/udevadm &&\
+ ln -s /bin/true /sbin/udevadm
+RUN systemctl enable snapd
+VOLUME ["/sys/fs/cgroup"]
+STOPSIGNAL SIGRTMIN+3
+RUN mkdir -p /geewallet
+WORKDIR /geewallet
+ADD geewallet /geewallet
+CMD ["/sbin/init"]
+EOF
+    $SUDO docker build -t $IMGNAME --force-rm=true --rm=true $BUILDDIR || clean_up
+fi
+
+# start the detached container
+$SUDO docker run \
+    --name=$CONTNAME \
+    -ti \
+    --tmpfs /run \
+    --tmpfs /run/lock \
+    --tmpfs /tmp \
+    --cap-add SYS_ADMIN \
+    --device=/dev/fuse \
+    --security-opt apparmor:unconfined \
+    --security-opt seccomp:unconfined \
+    -v /sys/fs/cgroup:/sys/fs/cgroup:ro \
+    -v /lib/modules:/lib/modules:ro \
+    -d $IMGNAME || clean_up
+
+# wait for snapd to start
+TIMEOUT=100
+SLEEP=0.1
+echo -n "Waiting up to $(($TIMEOUT/10)) seconds for snapd startup "
+while [ "$($SUDO docker exec $CONTNAME sh -c 'systemctl status snapd.seeded >/dev/null 2>&1; echo $?')" != "0" ]; do
+    echo -n "."
+    sleep $SLEEP || clean_up
+    if [ "$TIMEOUT" -le "0" ]; then
+        echo " Timed out!"
+        clean_up
+    fi
+    TIMEOUT=$(($TIMEOUT-1))
+done
+echo " done"
+
+$SUDO docker exec $CONTNAME snap install core --edge || clean_up
+echo "container $CONTNAME started ..."
+
+print_info
+rm_builddir