make extensions independent flatpaks

.gitignore

+docs/_build/
+docs/_versions
+docs/source/_build/
+docs/source/software_documentation/code/*
+.vscode/
+.idea/
+*.egg-info/
+.coverage
+coverage.xml
+
+__pycache__/
+pylint/
+venv/
+.venv/
+htmlcov/
+.pytest_cache/
+.mypy_cache/
+.flatpak-repo/
+.flatpak-builder/
+.flatpak-build/
+build/
+

Makefile

+.PHONY: test
+
+help:
+	cat Makefile
+
+flatpak:
+	flatpak --user remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+	flatpak-builder --user --install .flatpak-build/ org.blackfennec.extensions.base.yml --force-clean --install-deps-from flathub --repo=.flatpak-repo
+
+lint:
+	find . -name "*.py" | xargs pylint --output-format=text || true
+
+test:
+	pytest tests/;
+
+install:
+	python -m pip install -e .

org.blackfennec.app.metainfo.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<component type="addon">
+  <id>org.blackfennec.extensions.base</id>
+  <extends>org.blackfennec.app</extends>
+  <name>Base</name>
+  <summary>Provides commonly used types</summary>
+  <project_license>GPL-3.0</project_license>
+  <metadata_license>FSFAP</metadata_license>
+</component>

org.blackfennec.extensions.base.yml

+id: org.blackfennec.extensions.base
+branch: '1.0'
+runtime: org.blackfennec.app
+runtime-version: '1.0'
+sdk: org.gnome.Sdk//43
+build-extension: true
+modules:
+  - name: blackfennec.extensions.base
+    buildsystem: simple
+    build-commands:
+      - pip install --prefix=${FLATPAK_DEST} .
+    sources:
+      - type: dir
+        path: .