Move release from travis to github actions

- create packaging environment that produces deliverables
- removes travis integration
- configures github actions to call packaging after all the other
  tests are passing and to make a release if tag is present
- test.pypi.org is kept commented until we sort credentials for it
- no credentials are needed as they are already configured in github

Author: ssbarnea

.github/workflows/actions.yml

@@ -12,6 +12,8 @@ on:
     - >-
       **
   pull_request:
+  schedule:
+    - cron: 1 0 * * *  # Run daily at 0:01 UTC
 
 jobs:
   build_python:
@@ -127,3 +129,71 @@ jobs:
         grunt test
       env:
         CI: true
+  publish:
+    name: Publish to PyPI registry
+    needs:
+      - build_python
+      - build_javascript
+    runs-on: ubuntu-latest
+
+    env:
+      PY_COLORS: 1
+      TOXENV: packaging
+
+    steps:
+      - name: Switch to using Python 3.6 by default
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.6
+      - name: Install tox
+        run: python -m pip install --user tox
+      - name: Check out src from Git
+        uses: actions/checkout@v2
+        with:
+          # Get shallow Git history (default) for tag creation events
+          # but have a complete clone for any other workflows.
+          # Both options fetch tags but since we're going to remove
+          # one from HEAD in non-create-tag workflows, we need full
+          # history for them.
+          fetch-depth: >-
+            ${{
+              (
+                github.event_name == 'create' &&
+                github.event.ref_type == 'tag'
+              ) &&
+              1 || 0
+            }}
+      - name: Drop Git tags from HEAD for non-tag-create events
+        if: >-
+          github.event_name != 'create' ||
+          github.event.ref_type != 'tag'
+        run: >-
+          git tag --points-at HEAD
+          |
+          xargs git tag --delete
+      - name: Build dists
+        run: python -m tox
+      # Disabled until we get pytest-dev account maintainer on test.pypi.org
+      # - name: Publish to test.pypi.org
+      #   if: >-
+      #     (
+      #       github.event_name == 'push' &&
+      #       github.ref == format(
+      #         'refs/heads/{0}', github.event.repository.default_branch
+      #       )
+      #     ) ||
+      #     (
+      #       github.event_name == 'create' &&
+      #       github.event.ref_type == 'tag'
+      #     )
+      #   uses: pypa/gh-action-pypi-publish@master
+      #   with:
+      #     password: ${{ secrets.testpypi_password }}
+      #     repository_url: https://test.pypi.org/legacy/
+      - name: Publish to pypi.org
+        if: >-  # "create" workflows run separately from "push" & "pull_request"
+          github.event_name == 'create' &&
+          github.event.ref_type == 'tag'
+        uses: pypa/gh-action-pypi-publish@master
+        with:
+          password: ${{ secrets.pypi_password }}

.travis.yml

@@ -34,6 +34,34 @@ deps =
     # https://github.com/pytest-dev/pytest-rerunfailures/issues/134
     # pytest @ git+https://github.com/pytest-dev/pytest.git
 
+[testenv:packaging]
+description =
+    Do packaging/distribution. If tag is not present or PEP440 compliant upload to
+    PYPI could fail
+# `usedevelop = true` overrides `skip_install` instruction, it's unwanted
+usedevelop = false
+# don't install package in this env
+skip_install = true
+deps =
+    collective.checkdocs >= 0.2
+    pep517 >= 0.8.2
+    pip >= 20.2.2
+    toml >= 0.10.1
+    twine >= 3.2.0
+setenv =
+commands =
+    rm -rfv {toxinidir}/dist/
+    python -m pep517.build \
+      --source \
+      --binary \
+      --out-dir {toxinidir}/dist/ \
+      {toxinidir}
+    # metadata validation
+    sh -c "python -m twine check {toxinidir}/dist/*"
+whitelist_externals =
+    rm
+    sh
+
 [flake8]
 max-line-length = 88
 exclude = .eggs,.tox