Add ansible dockerfile

Plus the drone.yml file

.drone.yml

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+pipeline:
+  docker-build-push:
+    image: docker
+    commands:
+      - apk add -U git
+      - /bin/sh buildAndPush.sh
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    when:
+      event: push
+    secrets: [docker_user, docker_password]
+branch: master

ansible/Dockerfile_2.4

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+FROM alpine:3.7 as builder
+RUN apk add -U
+RUN mkdir -p /var/cache/apk && ln -s /var/cache/apk /etc/apk/cache && apk add \
+    --update py2-pip gcc musl-dev python-dev libffi-dev openssl-dev make
+RUN pip install wheel && pip wheel --wheel-dir=/root/wheel ansible==2.4 docker-py
+
+FROM alpine:3.7 as production
+COPY --from=builder /root/wheel /root/wheel
+COPY --from=builder /root/.cache /root/.cache
+COPY --from=builder /etc/apk/cache /etc/apk/cache
+RUN apk add python py2-pip docker
+RUN pip install --no-index --find-links=/root/wheel ansible docker-py
+RUN rm -rf /root/.cache /etc/apk/cache/* /root/wheel/
+
+WORKDIR /ansible
+CMD ["echo", "Execute some ansible command. Remember to mount all in the /ansible dir."]

ansible/Dockerfile_2.5

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+FROM alpine:3.7 as builder
+RUN apk add -U
+RUN mkdir -p /var/cache/apk && ln -s /var/cache/apk /etc/apk/cache && apk add \
+    --update py2-pip gcc musl-dev python-dev libffi-dev openssl-dev make
+RUN pip install wheel && pip wheel --wheel-dir=/root/wheel ansible==2.5 docker-py
+
+FROM alpine:3.7 as production
+COPY --from=builder /root/wheel /root/wheel
+COPY --from=builder /root/.cache /root/.cache
+COPY --from=builder /etc/apk/cache /etc/apk/cache
+RUN apk add python py2-pip docker
+RUN pip install --no-index --find-links=/root/wheel ansible docker-py
+RUN rm -rf /root/.cache /etc/apk/cache/* /root/wheel/
+
+WORKDIR /ansible
+CMD ["echo", "Execute some ansible command. Remember to mount all in the /ansible dir."]

ansible/README.md

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+# Ansible
+
+This image will expect to find your reveal files at `/ansible`. You may want to use this function:
+
+``` bash
+function ansible(){
+    docker run -ti -v `pwd`:/ansible registry.daemons.it/ansible "$@"
+}
+```

buildAndPush.sh

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+#!/bin/sh
+
+files="$(git diff HEAD~ --name-only -- '*Dockerfile*')"
+write_registry="r.daemons.it"
+
+for file in $files
+do
+    dockerfile="$(echo $file | sed 's/.*\///')"
+    docker_name="$(echo $file | sed 's/\/.*//')"
+    tag="$(echo $dockerfile | sed 's/.*_//')"
+
+    # Asume that when using multiple stages, the good one is the one called
+    # production
+    docker build --target production -t $write_registry/$docker_name:$tag -t \
+        $write_registry/$docker_name:latest -f $file .
+    echo $DOCKER_PASSWORD | docker login -u $DOCKER_USER --password-stdin r.daemons.it
+    docker push $write_registry/$docker_name:$tag
+    docker push $write_registry/$docker_name:latest
+done
+
+