Add CI scripts for publishing to PyPI

.github/labels.yml

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+---
+# Labels names are important as they are used by Release Drafter to decide
+# regarding where to record them in changelog or if to skip them.
+#
+# The repository labels will be automatically configured using this file and
+# the GitHub Action https://github.com/marketplace/actions/github-labeler.
+- name: breaking
+  description: Breaking Changes
+  color: bfd4f2
+- name: bug
+  description: Something isn't working
+  color: d73a4a
+- name: build
+  description: Build System and Dependencies
+  color: bfdadc
+- name: ci
+  description: Continuous Integration
+  color: 4a97d6
+- name: dependencies
+  description: Pull requests that update a dependency file
+  color: 0366d6
+- name: documentation
+  description: Improvements or additions to documentation
+  color: 0075ca
+- name: duplicate
+  description: This issue or pull request already exists
+  color: cfd3d7
+- name: enhancement
+  description: New feature or request
+  color: a2eeef
+- name: github_actions
+  description: Pull requests that update Github_actions code
+  color: "000000"
+- name: good first issue
+  description: Good for newcomers
+  color: 7057ff
+- name: help wanted
+  description: Extra attention is needed
+  color: 008672
+- name: invalid
+  description: This doesn't seem right
+  color: e4e669
+- name: performance
+  description: Performance
+  color: "016175"
+- name: python
+  description: Pull requests that update Python code
+  color: 2b67c6
+- name: question
+  description: Further information is requested
+  color: d876e3
+- name: refactoring
+  description: Refactoring
+  color: ef67c4
+- name: removal
+  description: Removals and Deprecations
+  color: 9ae7ea
+- name: style
+  description: Style
+  color: c120e5
+- name: testing
+  description: Testing
+  color: b1fc6f
+- name: wontfix
+  description: This will not be worked on
+  color: ffffff

.github/release-drafter.yml

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+autolabeler:
+  - label: "github_actions"
+    files:
+      - ".github/workflows/*"
+  - label: "ci"
+    files:
+      - ".github/*"
+  - label: "documentation"
+    files:
+      - "*.md"
+    branch:
+      - '/docs{0,1}\/.+/'
+  - label: "bug"
+    branch:
+      - '/fix\/.+/'
+    title:
+      - "/fix/i"
+  - label: "enhancement"
+    branch:
+      - '/feature\/.+/'
+      - '/add\/.+/'
+      - '/support\/.+/'
+    title:
+      - "/add/i"
+      - "/support/i"
+  - label: "refactoring"
+    branch:
+      - '/refactor\/.+/'
+    title:
+      - "/refactor/i"
+  - label: "removal"
+    branch:
+      - '/deprecate\/.+/'
+      - '/remove\/.+/'
+    title:
+      - "/deprecate/i"
+      - "/remove/i"
+  - label: "testing"
+    branch:
+      - '/test\/.+/'
+    title:
+      - "/test/i"
+categories:
+  - title: ":boom: Breaking Changes"
+    label: "breaking"
+  - title: ":rocket: Features"
+    label: "enhancement"
+  - title: ":fire: Removals and Deprecations"
+    label: "removal"
+  - title: ":beetle: Fixes"
+    label: "bug"
+  - title: ":racehorse: Performance"
+    label: "performance"
+  - title: ":rotating_light: Testing"
+    label: "testing"
+  - title: ":construction_worker: Continuous Integration"
+    labels:
+      - "ci"
+      - "github_actions"
+  - title: ":books: Documentation"
+    label: "documentation"
+  - title: ":hammer: Refactoring"
+    label: "refactoring"
+  - title: ":lipstick: Style"
+    label: "style"
+  - title: ":package: Dependencies"
+    labels:
+      - "dependencies"
+      - "build"
+template: |
+  ## Changes
+
+  $CHANGES

.github/workflows/draft-release.yml

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+name: Draft release
+
+on:
+  workflow_dispatch:
+  # pull_request event is required only for autolabeler
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  update-release-draft:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@v5.15.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/labeler.yml

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+name: Labeler
+
+on:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  labeler:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2.3.4
+
+      - name: Run Labeler
+        uses: crazy-max/ghaction-github-labeler@v3.1.1
+        with:
+          skip-delete: true

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  publish-pypi:
+    name: Publish to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v2.3.4
+        with:
+          fetch-depth: 2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2.2.2
+        with:
+          python-version: "3.8"
+
+      - name: Upgrade pip
+        run: |
+          python -m pip install --upgrade pip
+          pip --version
+
+      - name: Install dependencies
+        run: |
+          pip install wheel
+          pip install tox tox-gh-actions
+
+      - name: Test with tox
+        run: tox
+
+      - name: Check passthrough models
+        run: python scripts/generate_passthrough_modules.py check
+
+      - name: Check if there is a parent commit
+        id: check-parent-commit
+        run: |
+          echo "::set-output name=sha::$(git rev-parse --verify --quiet HEAD^)"
+
+      - name: Detect new version
+        id: check-version
+        if: steps.check-parent-commit.outputs.sha
+        uses: salsify/action-detect-and-tag-new-version@v2.0.1
+        with:
+          create-tag: false
+          version-command: |
+            bash -o pipefail -c "cat bioimageio/core/VERSION | jq -r '.version'"
+
+      - name: Push tag
+        id: tag-version
+        if: steps.check-version.outputs.previous-version != steps.check-version.outputs.current-version
+        uses: mathieudutour/github-tag-action@v5.5
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          custom_tag: ${{ steps.check-version.outputs.current-version }}
+
+      - name: Build package
+        run: |
+          python setup.py sdist bdist_wheel
+
+      - name: Publish package on PyPI
+        if: steps.tag-version.outputs.new_tag
+        uses: pypa/gh-action-pypi-publish@v1.4.2
+        with:
+          user: __token__
+          password: "${{ secrets.PYPI_TOKEN }}"
+          packages_dir: dist/
+
+      - name: Publish the release notes
+        uses: release-drafter/release-drafter@v5.15.0
+        with:
+          publish: "${{ steps.tag-version.outputs.new_tag != '' }}"
+          tag: "${{ steps.tag-version.outputs.new_tag }}"
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"