initial

.github/workflows/ci.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  FORCE_COLOR: 1
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: earthly/actions-setup@v1
+        with:
+          version: v0.7.19
+      - uses: actions/checkout@v2
+      - name: Put back the git branch into git (Earthly uses it for tagging)
+        run: |
+          branch=""
+          if [ -n "$GITHUB_HEAD_REF" ]; then
+            branch="$GITHUB_HEAD_REF"
+          else
+            branch="${GITHUB_REF##*/}"
+          fi
+          git checkout -b "$branch" || true
+      - name: Run tests
+        run: earthly +test
+      - name: Run examples
+        run: earthly +test-examples
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: earthly/actions-setup@v1
+        with:
+          version: v0.7.19
+      - uses: actions/checkout@v2
+      - name: Put back the git branch into git (Earthly uses it for tagging)
+        run: |
+          branch=""
+          if [ -n "$GITHUB_HEAD_REF" ]; then
+            branch="$GITHUB_HEAD_REF"
+          else
+            branch="${GITHUB_REF##*/}"
+          fi
+          git checkout -b "$branch" || true
+      - name: Publish test
+        run: earthly --secret PYPI_TOKEN=${{ secrets.test_pypi_password }} --ci +publish --REPOSITORY=testpypi
+      - name: Publish
+        if: contains(github.ref, 'master')
+        run: earthly --secret PYPI_TOKEN=${{ secrets.pypi_password }} --ci +publish --REPOSITORY=pypi

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+/render
+/render.pdf
+/render.html

Earthfile

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+VERSION 0.6
+
+base-python:
+    FROM python:3.8
+
+    # Install Poetry
+    ENV PIP_CACHE_DIR /var/cache/buildkit/pip
+    RUN --mount=type=cache,target=$PIP_CACHE_DIR \
+        pip install poetry==1.6.1
+    RUN --mount=type=cache,target=$PIP_CACHE_DIR \
+        poetry config virtualenvs.create false
+
+    # Install graphviz which the tests use
+    RUN apt-get update && apt-get install -y graphviz && apt-get clean
+
+build:
+    FROM +base-python
+
+    WORKDIR /app
+
+    # Copy poetry files
+    COPY pyproject.toml poetry.lock README.md .
+
+    # We only want to install the dependencies once, so if we copied
+    # our code here now, we'd reinstall the dependencies ever ytime
+    # the code changes. Instead, comment out the line making us depend
+    # on our code, install, then copy our code and install again
+    # with the line not commented.
+    RUN sed -e '/packages/ s/^#*/#/' -i pyproject.toml
+
+    # Install dependencies
+    RUN poetry install
+
+    # Copy without the commented out packages line and install again
+    COPY --dir egga .
+    COPY pyproject.toml .
+    RUN poetry install
+
+test:
+    FROM +build
+
+    # Run tests
+    COPY --dir tests .
+    RUN poetry run pytest -n auto
+
+test-examples:
+    FROM +build
+
+    # Run examples
+    COPY --dir examples .
+    FOR example IN $(ls examples/**/*.py)
+        RUN poetry run python "$example"
+    END
+
+publish:
+    RUN --mount=type=cache,target=$PIP_CACHE_DIR \
+    --secret PYPI_TOKEN=+secrets/PYPI_TOKEN \
+    poetry publish \
+        --build --skip-existing -r $REPOSITORY \
+        -u __token__ -p $PYPI_TOKEN