setup-travis.sh

$ cat > .travis.yml <<EOF
sudo: required
dist: trusty
services:
    - docker
language: python
python:
    - '3.5'
script:
    - docker run -v \$(pwd):/snapcraft didrocks/snapcraft sh -c 'cd /snapcraft; snapcraft'
cache:
    - "\${HOME}/.snapstore-publish-macaroon.enc"
after_success:
    - sudo add-apt-repository ppa:facundo/salty -y
    - sudo apt-get update -q
    - sudo apt-get install libsodium13 -y
    - pip3 install snapstore-publish
    - '[ "\${TRAVIS_BRANCH}" = "master" ] && snapstore-publish --name cassandra --series 16 --channel beta *.snap'
    - '[ "\${TRAVIS_BRANCH}" = "edge" ] && snapstore-publish --name cassandra --series 16 --channel edge *.snap'
EOF
$ export MACAROON_SECRET="You're not my supervisor"
$ travis encrypt -a AUTH_MACAROON="$(macaroon-create)"