%global commit      ac8c0c990555f26cdad31bf712286b85b20af384
%global shortcommit %(c=%{commit}; echo ${c:0:7})
%global commitdate  20260521

Name:           meshfix
Version:        2.1.0
Release:        1.%{commitdate}git%{shortcommit}%{?dist}
Summary:        Repair tool for non-manifold and defective triangle meshes

# Upstream is dual-licensed (README.txt, "This program is dual-licensed"):
#   (1) GNU GPL version 3 or later, or
#   (2) a commercial agreement with the Authors and IMATI-GE/CNR.
# Option (1) is an unqualified GPLv3-or-later grant, so we ship under it.
# Note the prose at README.txt:31 ("cannot be used for commercial purposes
# without a proper licensing contract") describes option (2) only -- it does
# not restrict the GPL grant, which permits commercial use on GPL terms.
License:        GPL-3.0-or-later
URL:            https://github.com/MarcoAttene/MeshFix-V2.1
Source0:        %{url}/archive/%{commit}/%{name}-%{shortcommit}.tar.gz

BuildRequires:  cmake
BuildRequires:  gcc
BuildRequires:  gcc-c++
BuildRequires:  make

%description
MeshFix repairs defective triangle meshes: it removes self-intersections and
degenerate faces, discards spurious components, and fills holes to produce a
single closed manifold surface. It reads and writes OFF, PLY and STL.

It is widely used to clean up surface reconstructions in neuroimaging
pipelines, where segmentation output is frequently non-manifold, but the tool
itself is general-purpose.

%prep
%autosetup -n MeshFix-V2.1-%{commit} -p1

# Upstream ships prebuilt Windows binaries; never package them.
rm -rf bin bin64
test ! -e bin64/MeshFix.exe || { echo "ERROR: bundled Windows binaries remain"; exit 1; }

# README.txt ships with CRLF line endings.
sed -i 's/\r$//' README.txt
! grep -qU $'\r' README.txt || { echo "ERROR: CRLF remains in README.txt"; exit 1; }

# cmake_minimum_required(VERSION 3.0) is below the floor CMake 4 accepts.
sed -i 's/^cmake_minimum_required.*/cmake_minimum_required(VERSION 3.10)/' CMakeLists.txt
grep -q 'cmake_minimum_required(VERSION 3.10)' CMakeLists.txt \
    || { echo "ERROR: cmake_minimum_required not raised"; exit 1; }

# Upstream redirects the executable back into the *source* tree
# (RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin64), which puts it
# outside the build directory and defeats %%cmake_build's normal layout.
# The block spans four lines; the two CXX_STANDARD calls are single-line and
# so cannot match the opening address, which anchors on end-of-line.
sed -i '/^set_target_properties(MeshFix$/,/^)$/d' CMakeLists.txt
! grep -q 'RUNTIME_OUTPUT_DIRECTORY' CMakeLists.txt \
    || { echo "ERROR: RUNTIME_OUTPUT_DIRECTORY still set"; exit 1; }
grep -q 'CXX_STANDARD 11' CMakeLists.txt \
    || { echo "ERROR: the sed range ate the CXX_STANDARD properties"; exit 1; }

%build
%cmake
%cmake_build

%install
install -Dpm 0755 %{_vpath_builddir}/MeshFix %{buildroot}%{_bindir}/%{name}

%check
# Functional test: an open tetrahedron (3 of 4 faces) must come back closed.
cat > holed.off <<'EOF'
OFF
4 3 0
0.0 0.0 0.0
1.0 0.0 0.0
0.0 1.0 0.0
0.0 0.0 1.0
3 0 2 1
3 0 1 3
3 0 3 2
EOF
%{buildroot}%{_bindir}/%{name} holed.off fixed.off
test -s fixed.off || { echo "ERROR: no output mesh produced"; exit 1; }
_counts=$(grep -m1 -E '^[0-9]+ [0-9]+ [0-9]+$' fixed.off)
echo "repaired mesh counts (verts faces edges): ${_counts}"
test "$(echo "${_counts}" | awk '{print $2}')" -eq 4 \
    || { echo "ERROR: hole was not filled; expected 4 faces"; exit 1; }

%files
%license gpl-3.0.txt
%doc README.txt
%{_bindir}/%{name}

%changelog
* Mon Aug 24 2026 Morgan Hough <morgan.hough@gmail.com> - 2.1.0-1.20260521gitac8c0c9
- Initial package. Recovered from a stale local clone that never reached git;
  the spec had never been built, so this is a first working build rather than
  a straight import.
- Drop zlib-devel, freeglut-devel, libXmu-devel and libXi-devel: MeshFix
  includes no zlib, GL/GLUT or X11 header anywhere in src/ or include/.
- Remove upstream's prebuilt Windows binaries (bin/, bin64/) in %%prep.
- Raise cmake_minimum_required 3.0 -> 3.10 for CMake 4.
- Drop RUNTIME_OUTPUT_DIRECTORY, which wrote the executable back into the
  source tree; the install step no longer needs to "find" the binary.
- Build with %%cmake/%%cmake_build so Fedora's flags and hardening apply.
- Use sed rather than perl for the CMakeLists edits: perl is not in the
  minimal buildroot and pulling it in for one substitution is not worth it.
- Add a %%check that repairs an open tetrahedron and verifies it comes back
  closed.
- Convert README.txt from CRLF to LF.