build: migrate from Poetry to Hatch

- Replace poetry-core + poetry-dynamic-versioning build backend with
  hatchling + hatch-vcs
- Move dev dependencies from [tool.poetry.group.dev] to
  [project.optional-dependencies] dev group (install with pip install -e ".[dev]")
- Add [tool.hatch.build.hooks.vcs] to generate plann/_version.py at install time
- Set dynamic = ["version"] in [project] so hatch-vcs controls the version
- Remove poetry.lock (no lock file with hatch)
- Update CI workflows to use pip install -e ".[dev]" and python -m pytest/deptry
- Update Makefile dev/test/lint targets accordingly
- Add plann/_version.py to .gitignore (auto-generated, commit-specific)

This fixes the broken versioning: pip show plann now reports the correct
version from git tags instead of 0.0.0.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tobixen

.github/workflows/publish.yaml

@@ -16,27 +16,23 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
       with:
-        fetch-depth: 0  # Fetch all history for poetry-dynamic-versioning
+        fetch-depth: 0  # Fetch all history for hatch-vcs
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install poetry
-        poetry install --with dev
+      run: pip install -e ".[dev]"
 
     - name: Run Ruff linter
       uses: astral-sh/ruff-action@v3
       with:
         args: check .
 
     - name: Run tests
-      run: |
-        poetry run pytest
+      run: python -m pytest
 
   publish:
     needs: test  # Only publish if tests pass
@@ -50,27 +46,18 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
       with:
-        fetch-depth: 0  # Fetch all history for poetry-dynamic-versioning
+        fetch-depth: 0  # Fetch all history for hatch-vcs
 
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
         python-version: '3.11'
 
     - name: Install build tools
-      run: |
-        python -m pip install --upgrade pip
-        pip install build
-
-    - name: Verify version from git tags
-      run: |
-        git describe --tags --long
-        echo "Git tag detected above ^"
+      run: pip install build hatch-vcs
 
     - name: Build package
-      run: |
-        # Build using PEP 517 with poetry-dynamic-versioning backend
-        python -m build --sdist --wheel
+      run: python -m build --sdist --wheel
 
     - name: Display built packages
       run: |

.github/workflows/tests.yaml

@@ -20,17 +20,16 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
+      with:
+        fetch-depth: 0  # Fetch all history for hatch-vcs
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install poetry
-        poetry install --with dev
+      run: pip install -e ".[dev]"
 
     - name: Run Ruff linter
       uses: astral-sh/ruff-action@v3
@@ -39,9 +38,7 @@ jobs:
 
     - name: Check dependencies with deptry
       if: matrix.python-version != '3.9'
-      run: |
-        poetry run deptry .
+      run: python -m deptry .
 
     - name: Run tests
-      run: |
-        poetry run pytest
+      run: python -m pytest

.gitignore

@@ -58,3 +58,4 @@ tmp/
 # OS
 .DS_Store
 Thumbs.db
+plann/_version.py

Makefile

@@ -16,7 +16,7 @@ help:
 	@echo "  make uninstall                     Uninstall plann"
 	@echo ""
 	@echo "Development:"
-	@echo "  make dev                           Install in development mode (Poetry)"
+	@echo "  make dev                           Install in development mode"
 	@echo "  make test                          Run tests"
 	@echo "  make lint                          Run linter"
 	@echo "  make clean                         Clean build artifacts"
@@ -56,17 +56,17 @@ uninstall:
 # Install in development mode
 dev:
 	@echo "Installing in development mode..."
-	@poetry install
+	@PIP_BREAK_SYSTEM_PACKAGES=1 pip install -e ".[dev]"
 	@echo ""
-	@echo "Installed! Run: poetry run plann --help"
+	@echo "Installed! Run: plann --help"
 
 # Run tests
 test:
-	@poetry run pytest tests/ -v
+	@python -m pytest tests/ -v
 
 # Run linter
 lint:
-	@poetry run ruff check .
+	@python -m ruff check .
 
 # Clean build artifacts
 clean:
@@ -84,7 +84,7 @@ install-completion-user:
 	@echo "Installing shell completion for current user..."
 	@mkdir -p "$(COMPLETION_DIR_USER)"
 	@_PLANN_COMPLETE=bash_source plann > "$(COMPLETION_DIR_USER)/plann" 2>/dev/null || \
-		poetry run python -c "import click; from plann.cli import cli; print(click.shell_completion.get_completion_class('bash')(cli, {}, 'plann', '_PLANN_COMPLETE').source())" > "$(COMPLETION_DIR_USER)/plann"
+		python -c "import click; from plann.cli import cli; print(click.shell_completion.get_completion_class('bash')(cli, {}, 'plann', '_PLANN_COMPLETE').source())" > "$(COMPLETION_DIR_USER)/plann"
 	@echo "Completion script installed to $(COMPLETION_DIR_USER)/plann"
 	@echo "Restart your shell or run: source $(COMPLETION_DIR_USER)/plann"