Add upload-pypi role

Create a role to upload python artificats using twine

username and password are required, so remove them from
defaults. Install twine in the homedir by default if the twine command
is not found.

Upload wheels if found first, then tarballs.
Change-Id: I8857e2983e1175107164536d57e313a5b404bddb
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/upload-pypi/README.rst

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+Upload python packages to PyPI
+
+**Role Variables**
+
+.. zuul:rolevar:: pypi_info
+
+   Complex argument which contains the information about the PyPI
+   server as well as the authentication information needed. It is
+   expected that this argument comes from a `Secret`.
+
+  .. zuul:rolevar:: username
+
+     Username to use to log in to PyPI.
+
+  .. zuul:rolevar:: password
+
+     Password to use to log in to PyPI.
+
+  .. zuul:rolevar:: repository
+     :default: pypi
+
+     Name of the repository to upload to
+
+  .. zuul:rolevar:: repository_url
+     :default: https://pypi.python.org/pypi
+
+     URL of the PyPI repostory
+
+.. zuul:rolevar:: pypi_path
+   :default: src/{{ zuul.project.canonical_name }}/dist
+
+   Path containing artifacts to upload.

roles/upload-pypi/defaults/main.yaml

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+---
+pypi_path: "src/{{ zuul.project.canonical_name }}/dist"
+pypi_repository: "{{ pypi_info.repository|default('pypi') }}"
+pypi_repository_url: "{{ pypi_info.repository_url|default('https://pypi.python.org/pypi') }}"

roles/upload-pypi/tasks/main.yaml

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+- name: Check for twine install
+  command: which twine
+  ignore_errors: yes
+  register: twine_command_which
+
+- name: Ensure twine is installed
+  command: pip install --user twine
+  when: not twine_command_which|succeeded
+
+- name: Install .pypirc configuration file
+  template:
+    dest: ~/.pypirc
+    mode: 0400
+    src: .pypirc.j2
+
+- name: Find wheels to upload
+  find:
+    paths: "{{ pypi_path }}"
+    patterns: "*.whl"
+  register: found_wheels
+
+- name: Upload wheel with twine before tarballs
+  command: "twine upload -r {{ pypi_repository }} {{ item }}"
+  with_items: "{{ found_wheels.files }}"
+  when: found_wheels.matched|bool
+
+- name: Find tarballs to upload
+  find:
+    paths: "{{ pypi_path }}"
+    patterns: "*.tar.gz"
+  register: found_tarballs
+
+- name: Upload tarballs with twine
+  command: "twine upload -r {{ pypi_repository }} {{ item }}"
+  with_items: "{{ found_tarballs.files }}"
+  when: found_tarballs.matched|bool

roles/upload-pypi/templates/.pypirc.j2

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+[distutils]
+index-servers=
+  {{ pypi_repository }}
+
+[{{ pypi_repository }}]
+repository:{{ pypi_repository_url }}
+username:{{ pypi_info.username }}
+password:{{ pypi_info.password }}