Kick everything off from a single container

Signed-off-by: Aanand Prasad <aanand.prasad@gmail.com>

script/test

@@ -3,17 +3,14 @@
 
 set -ex
 
-docker build -t docker-compose .
-docker run --privileged --rm --entrypoint flake8 docker-compose compose
+TAG="docker-compose:$(git rev-parse --short HEAD)"
 
-docker build -f Dockerfile.tests -t docker-compose-tests .
-
-if [ "$DOCKER_VERSIONS" == "" ]; then
-  DOCKER_VERSIONS="1.5.0"
-elif [ "$DOCKER_VERSIONS" == "all" ]; then
-  DOCKER_VERSIONS="1.3.3 1.4.1 1.5.0"
-fi
-
-for version in $DOCKER_VERSIONS; do
-  docker run --privileged --rm -e "DOCKER_VERSION=$version" docker-compose-tests nosetests "$@"
-done
+docker build -t "$TAG" .
+docker run \
+  --rm \
+  --volume="/var/run/docker.sock:/var/run/docker.sock" \
+  -e DOCKER_VERSIONS \
+  -e "TAG=$TAG" \
+  --entrypoint="script/test-versions" \
+  "$TAG" \
+  "$@"