Use previously CI environment

.travis.yml

@@ -1,8 +1,10 @@
 ---
 
+os: linux
 dist: bionic
 language: python
-python: "3.8"
+python:
+  - "3.7"
 
 jobs:
   include:
@@ -18,12 +20,35 @@ cache:
     - /home/travis/.vagrant.d/boxes
     - /home/travis/.cache/pipenv
 
-install:
-  - cd ci && ./install.sh
+before_install:
+  # Install libvirt, travis and KVM
+  # https://github.com/alvistack/ansible-role-virtualbox/blob/master/.travis.yml
+  - |
+    curl -Os https://releases.hashicorp.com/vagrant/2.2.7/vagrant_2.2.7_x86_64.deb
+    curl -Os https://releases.hashicorp.com/vagrant/2.2.7/vagrant_2.2.7_SHA256SUMS
+    curl -Os https://releases.hashicorp.com/vagrant/2.2.7/vagrant_2.2.7_SHA256SUMS.sig
+    gpg --receive-key 51852D87348FFC4C
+    gpg --verify vagrant_2.2.7_SHA256SUMS.sig vagrant_2.2.7_SHA256SUMS
+    sha256sum -c vagrant_2.2.7_SHA256SUMS 2>&1 | grep OK
+    sudo apt-get -qq update
+    sudo apt-get -qq install bridge-utils dnsmasq-base ebtables libvirt-bin \
+        libvirt-dev qemu-kvm qemu-utils ruby-dev
+    sudo dpkg -i vagrant_2.2.7_x86_64.deb
+    sudo vagrant plugin install vagrant-libvirt
+    sudo vagrant plugin list
+    rm -rf vagrant_2.2.7_*
+  # pipenv installation
+  # https://github.com/jonashackt/molecule-ansible-docker-aws/blob/master/.travis.yml
+  - |
+    sudo apt-get -qq install python3.7
+    curl -skL https://bootstrap.pypa.io/get-pip.py | sudo -H python3.7
+    sudo -H pip3 install pipenv
+    sudo -H pipenv install
 
 script:
-  - cd ${TRAVIS_BUILD_DIR}/ansible/roles/$TEST_ROLE
-  - sudo -E pipenv run molecule lint
-  - sudo -E pipenv run molecule syntax
-  - travis_wait 30 sudo -E pipenv run molecule converge
-  - travis_wait 30 sudo -E pipenv run molecule idempotence
+  - |
+    cd ansible/roles/$TEST_ROLE
+    sudo -E pipenv run molecule lint
+    sudo -E pipenv run molecule syntax
+    travis_wait 30 sudo -E pipenv run molecule converge
+    travis_wait 30 sudo -E pipenv run molecule idempotence

Pipfile

@@ -0,0 +1,15 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[packages]
+# https://pypi.org/project/ansible/
+ansible = "==2.10.0"
+molecule = "==3.0.2"
+molecule-vagrant = "==0.2"
+python-vagrant = "==0.5.15"
+testinfra = "==5.0.0"
+
+[requires]
+python_version = "3.7"