# pymeshfix -- Python bindings (nanobind) for Marco Attene's MeshFix 2.1, which
# repairs triangular surface meshes: fills holes, removes self-intersections
# and degenerate faces, keeps the largest component. New to Fedora.
# babelbrain's Step 1 (BabelDatasetPreps) runs pymeshfix.clean_from_file on
# the skin and skull STLs it extracts from the SimNIBS head model, and the
# import is unconditional.
#
# MeshFix is compiled in from src/ (it has no shared-library release; our
# `meshfix` package builds the command-line tool from the same code).
# Licence: every MeshFix source file is "dual-licensed": GPL v3 or later, or
# a commercial licence from IMATI-GE / CNR. The Python layer is GPL-3.0 as
# well (LICENSE). The pyproject classifier says AGPL; the LICENSE file and
# every header say GPL, and the LICENSE file is what we ship.

# scikit-build-core builds the extension via CMake and the debug sources are
# not tracked into debugsourcefiles.list (empty -> FTBFS), as with
# python-babelviscofdtd; disable the debug package.
%global debug_package %{nil}

%global pypi_name pymeshfix
%global meshfix_version 2.1

Name:           python-%{pypi_name}
Version:        0.18.1
Release:        1%{?dist}
Summary:        Repair triangular surface meshes using MeshFix

License:        GPL-3.0-or-later
URL:            https://github.com/pyvista/pymeshfix
Source0:        %{pypi_source %{pypi_name}}
# MeshFix passes already-formatted strings as printf formats; Fedora builds with
# -Werror=format-security. Use fputs. (Same text, no format expansion.)
Patch0:         pymeshfix-format-security.patch

BuildRequires:  python3-devel
BuildRequires:  cmake
BuildRequires:  ninja-build
BuildRequires:  gcc-c++
# The build backend's own requirements (scikit-build-core, nanobind) come from
# %%pyproject_buildrequires; nanobind's CMake config lives in the Python
# package, which scikit-build-core finds through its cmake.prefix entry point.

%global _description %{expand:
pymeshfix wraps MeshFix, which takes a raw digitised polygon mesh and
produces a clean mesh where all the occurrences of a specific set of
"defects" are corrected: it fills holes, removes self-intersections and
degenerate faces, and keeps the largest connected component. The result is
a single manifold, watertight surface suitable for voxelisation and
simulation. Works from NumPy arrays or STL/PLY files.}

%description %_description

%package -n     python3-%{pypi_name}
Summary:        %{summary}
Provides:       bundled(meshfix) = %{meshfix_version}

%description -n python3-%{pypi_name} %_description

%prep
%autosetup -p1 -n %{pypi_name}-%{version}
# A stray CMakeCache.txt from the maintainer's checkout is in the sdist.
rm -f CMakeCache.txt
# Upstream caps requires-python at <3.15 because it had no 3.15 wheels yet;
# the stable-ABI extension builds and imports on 3.15 (rawhide).
sed -i 's/^requires-python = ">=3.10,<3.15"/requires-python = ">=3.10"/' pyproject.toml
grep -q '^requires-python = ">=3.10"$' pyproject.toml

%generate_buildrequires
%pyproject_buildrequires -p

%build
%pyproject_wheel

%install
%pyproject_install
# No PEP 639 License-File in the metadata; LICENSE is listed by hand.
%pyproject_save_files -L %{pypi_name}

%check
# pymeshfix.examples downloads/loads sample meshes through pyvista (optional).
%pyproject_check_import -e '%{pypi_name}.examples*'
cd /
# A unit cube with one face missing: MeshFix must close the hole, giving a
# watertight mesh with 12 triangles and a consistent Euler characteristic.
PYTHONPATH=%{buildroot}%{python3_sitearch} %{python3} -c '
import numpy as np, pymeshfix
v = np.array([[0,0,0],[1,0,0],[1,1,0],[0,1,0],[0,0,1],[1,0,1],[1,1,1],[0,1,1]], float)
f = np.array([[0,2,1],[0,3,2],[4,5,6],[4,6,7],[0,1,5],[0,5,4],[1,2,6],[1,6,5],[2,3,7],[2,7,6]])  # -x face missing
m = pymeshfix.MeshFix(v, f)
m.repair()
nv, nf = len(m.points), len(m.faces)
assert nf == 12 and nv == 8, (nv, nf)
# V - E + F = 2 for a closed genus-0 surface, with E = 3F/2 for a triangle mesh.
assert nv - 3 * nf // 2 + nf == 2, (nv, nf)
print("repaired cube:", nv, "vertices", nf, "faces")'

%files -n python3-%{pypi_name} -f %{pyproject_files}
%license LICENSE
%doc README.rst

%changelog
* Sun Oct 11 2026 Morgan Hough <morgan.hough@gmail.com> - 0.18.1-1
- Initial package, for babelbrain Step 1 (skin/skull STL repair).
- requires-python cap lifted for Python 3.15; stray CMakeCache.txt removed.
- Patch0: fputs instead of printf(fms) in tmesh.cpp (-Werror=format-security).