Publish Python generated protobuf code to PyPI (#74)

**Public-Facing Changes**
Published a new package to PyPI called `foxglove-schemas-protobuf`.
Import classes as follows:

```py
from foxglove_schemas_protobuf.RawImage_pb2 import RawImage
```

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches: [main]
-    tags: ["releases/typescript/v*"]
+    tags: ["releases/**"]
   pull_request:
     branches: ["*"]
 
@@ -45,6 +45,44 @@ jobs:
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_PUBLISH_TOKEN }}
 
+  python:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: python
+    steps:
+      - uses: actions/checkout@v3
+      - uses: arduino/setup-protoc@v1
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.7
+          cache: pipenv
+      - run: pip install pipenv==2022.7.24
+
+      - run: make test
+      - run: make build
+
+      - name: Publish foxglove-schemas-protobuf to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        if: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}
+        with:
+          user: __token__
+          password: ${{ secrets.TESTPYPI_API_TOKEN }}
+          packages_dir: python/foxglove-schemas-protobuf/dist
+          repository_url: https://test.pypi.org/legacy/
+          skip_existing: true
+
+      - name: Publish foxglove-schemas-protobuf to PyPI
+        if: |
+          !github.event.pull_request.head.repo.fork &&
+          github.actor != 'dependabot[bot]' &&
+          startsWith(github.ref, 'refs/tags/releases/python/foxglove-schemas-protobuf/v')
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: python/foxglove-schemas-protobuf/dist
+
   ros:
     runs-on: ubuntu-latest
     strategy:

.vscode/settings.json

@@ -16,5 +16,14 @@
   "eslint.options": {
     "reportUnusedDisableDirectives": "error"
   },
-  "jest.jestCommandLine": "yarn test"
+  "jest.jestCommandLine": "yarn test",
+
+  "python.formatting.provider": "black",
+  "python.analysis.typeCheckingMode": "strict",
+  "python.linting.flake8Enabled": true,
+  "python.linting.enabled": true,
+  "python.linting.flake8Args": ["--config", "python/.flake8"],
+  "[python]": {
+    "editor.defaultFormatter": "ms-python.python"
+  }
 }

python/.gitignore

@@ -0,0 +1,6 @@
+**/*.pyc
+build
+dist
+*.egg-info
+*_pb2*
+.pytest_cache

python/Makefile

@@ -0,0 +1,39 @@
+.PHONY: pipenv
+pipenv:
+	SETUPTOOLS_ENABLE_FEATURES="legacy-editable" pipenv install --dev --deploy
+
+ifeq ($(shell uname),Darwin)
+SED_ARGS = -i ''
+else
+SED_ARGS = -i
+endif
+
+.PHONY: generate-protobuf
+generate-protobuf:
+	rm -rf foxglove-schemas-protobuf/foxglove_schemas_protobuf/*_pb2*
+	pipenv run protoc \
+		--python_out=foxglove-schemas-protobuf/foxglove_schemas_protobuf \
+		--mypy_out=foxglove-schemas-protobuf/foxglove_schemas_protobuf \
+		--proto_path ../schemas/proto \
+		../schemas/proto/foxglove/*.proto
+	mv foxglove-schemas-protobuf/foxglove_schemas_protobuf/foxglove/* foxglove-schemas-protobuf/foxglove_schemas_protobuf
+	rmdir foxglove-schemas-protobuf/foxglove_schemas_protobuf/foxglove
+	sed -E $(SED_ARGS) 's/from foxglove import/from . import/g' foxglove-schemas-protobuf/foxglove_schemas_protobuf/*_pb2.py
+	sed -E $(SED_ARGS) 's/import foxglove\.(.+)$$/from . import \1 as foxglove_\1/g' foxglove-schemas-protobuf/foxglove_schemas_protobuf/*_pb2.pyi
+	sed -E $(SED_ARGS) 's/foxglove\./foxglove_/g' foxglove-schemas-protobuf/foxglove_schemas_protobuf/*_pb2.pyi
+
+.PHONY: build
+build: pipenv generate-protobuf
+	pipenv run python -m build foxglove-schemas-protobuf
+
+.PHONY: test
+test: pipenv generate-protobuf
+	pipenv run python -m pytest foxglove-schemas-protobuf
+
+.PHONY: clean
+clean:
+	rm -rf dist
+	find . -name "build" -type d -exec rm -rf {} +
+	find . -name "dist" -type d -exec rm -rf {} +
+	find . -name "*.egg-info" -type d -exec rm -rf {} +
+	find . -name "*_pb2*" -delete

python/Pipfile

@@ -0,0 +1,17 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+protobuf = "*"
+foxglove-schemas-protobuf = {editable = true, path = "./foxglove-schemas-protobuf"}
+
+[dev-packages]
+build = "*"
+mypy-protobuf = "*"
+pipenv = "*"
+pytest = "*"
+
+[requires]
+python_version = "3"