Test and publish with CDP (#512)

- Run unit tests in CDP
- Publish new versions of senza with CDP

Dockerfile

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+# Hack to upload version to Pypi
+
+FROM registry.opensource.zalan.do/stups/python AS builder
+ARG VERSION
+RUN apt-get update && \
+    apt-get install -q -y python3-pip && \
+    pip3 install -U tox setuptools
+COPY . /build
+WORKDIR /build
+RUN sed -i "s/__version__ = .*/__version__ = '${VERSION}'/" */__init__.py
+RUN python3 setup.py sdist bdist_wheel
+
+FROM pierone.stups.zalan.do/teapot/python-cdp-release:latest
+COPY --from=builder /build/dist /pydist

delivery.yaml

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+version: "2017-09-20"
+notifications:
+  hipchat:
+    rooms:
+     - cdp-notifications-test
+pipeline:
+  - id: build
+    type: script
+    overlay: ci/python
+    commands:
+    - desc: "Install dependencies"
+      cmd: pip install -r requirements.txt
+    - desc: "Run Tests"
+      cmd: python3 setup.py test
+    - desc: "Check code style"
+      cmd: python3 setup.py flake8
+    - desc: "Build docker image that will upload package"
+      cmd: |
+        VERSION=$(./next-version)
+
+        if [[ -z "${CDP_PULL_REQUEST_NUMBER}" ]]; then
+          DOCKER_IMAGE="pierone.stups.zalan.do/automata/senza-release:${CDP_TARGET_REPOSITORY_COUNTER}"
+        else
+          DOCKER_IMAGE="pierone.stups.zalan.do/automata/senza-release:${CDP_TARGET_REPOSITORY_COUNTER}-snapshot"
+        fi
+
+        docker build --build-arg VERSION="$VERSION" -t "$DOCKER_IMAGE" .
+
+        if [[ -z "${CDP_PULL_REQUEST_NUMBER}" ]]; then
+            docker push "$DOCKER_IMAGE"
+            git gh-tag "$VERSION"
+        fi
+  - id: release
+    type: process
+    desc: Release to TestPyPI
+    target: stups
+    process: microservice_standard_deployment
+    config:
+      apply_permanent_resources:
+        image: pierone.stups.zalan.do/automata/senza-release:#{CDP_TARGET_REPOSITORY_COUNTER}
+        env:
+          - name: USERNAME
+            valueFrom:
+              secretKeyRef:
+                name: teapot-pypi-credentials
+                key: username
+          - name: PASSWORD
+            valueFrom:
+              secretKeyRef:
+                name: teapot-pypi-credentials
+                key: password

next-version

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+#!/usr/bin/env python3
+
+import subprocess
+
+MAJOR_VERSION = 2
+MINOR_VERSION = 1
+
+
+def get_latest_version() -> (int, int, int):
+    """
+    Gets latest version based on Git Tags.
+    """
+    proc = subprocess.run(['git', 'tag'], stdout=subprocess.PIPE)
+
+    versions = sorted(map(lambda version: tuple(int(sub)
+                                                for sub
+                                                in version.split('.')),
+                          proc.stdout.decode().splitlines()))
+    return versions[-1]
+
+
+if __name__ == '__main__':
+    major, minor, build = get_latest_version()
+
+    if major != MAJOR_VERSION or minor != MINOR_VERSION:
+        new_build = 0
+    else:
+        new_build = build + 1
+
+    print(f"{MAJOR_VERSION}.{MINOR_VERSION}.{new_build}")