From 3e17027d913a93d61b0791a680690cf790dd31dc Mon Sep 17 00:00:00 2001
From: Gaetan Lepage <gaetan@glepage.com>
Date: Wed, 10 Jun 2026 21:48:48 +0000
Subject: [PATCH] python3Packages.matscipy: init at 1.2.0

---
 .../python-modules/matscipy/default.nix       | 186 ++++++++++++++++++
 pkgs/top-level/python-packages.nix            |   2 +
 2 files changed, 188 insertions(+)
 create mode 100644 pkgs/development/python-modules/matscipy/default.nix

diff --git a/pkgs/development/python-modules/matscipy/default.nix b/pkgs/development/python-modules/matscipy/default.nix
new file mode 100644
index 000000000000..9183f200e54d
--- /dev/null
+++ b/pkgs/development/python-modules/matscipy/default.nix
@@ -0,0 +1,186 @@
+{
+  lib,
+  stdenv,
+  buildPythonPackage,
+  fetchFromGitHub,
+  pythonAtLeast,
+
+  fetchpatch,
+
+  # build-system
+  meson-python,
+  ninja,
+  numpy,
+
+  # dependencies
+  ase,
+  packaging,
+  scipy,
+
+  # optional-dependencies
+  # cli:
+  argcomplete,
+  # dislocation:
+  atomman,
+  nglview,
+  ovito,
+  # docs:
+  jupytext,
+  myst-nb,
+  numpydoc,
+  pydata-sphinx-theme,
+  sphinx,
+  sphinx-copybutton,
+  sphinx-rtd-theme,
+  sphinxcontrib-spelling,
+
+  # tests
+  pytest-subtests,
+  pytest-timeout,
+  pytest-xdist,
+  sympy,
+
+  # tests
+  pytestCheckHook,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "matscipy";
+  version = "1.2.0";
+  pyproject = true;
+  __structuredAttrs = true;
+
+  src = fetchFromGitHub {
+    owner = "libAtoms";
+    repo = "matscipy";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-XmY13B5S8tXYiUaec9gL6e0E3bSnbaMteHHiX2ij2sw=";
+  };
+
+  patches = [
+    # API: Fix compatibility with ASE 3.27.0
+    # https://github.com/libAtoms/matscipy/pull/301
+    (fetchpatch {
+      url = "https://github.com/libAtoms/matscipy/commit/6a91a4646e30796abe51ef3efa4b479d4471aae0.patch";
+      hash = "sha256-PH9I+7+nN6fSkugVbxPCs3LqjhP/fQ5NZjiNQ7F70YU=";
+    })
+    (fetchpatch {
+      url = "https://github.com/libAtoms/matscipy/commit/f6478347bbceeab8ec177042b6ed1243e742d55f.patch";
+      hash = "sha256-DKk+1TlP+OngcmycsCIE+7s2h/7wa7Gxv9APbuIAoZg=";
+    })
+  ];
+
+  postPatch =
+    # Otherwise the script fails as it can't resolve the version with git
+    ''
+      substituteInPlace discover_version.py \
+        --replace-fail \
+          "version = get_version_from_git()" \
+          "version = '${finalAttrs.version}'"
+    ''
+    # Failed: [pytest] section in setup.cfg files is no longer supported, change to [tool:pytest] instead.
+    + ''
+      substituteInPlace setup.cfg \
+        --replace-fail \
+          "[pytest]" \
+          "[tool:pytest]"
+    '';
+
+  build-system = [
+    # meson
+    meson-python
+    ninja
+    numpy
+  ];
+
+  dependencies = [
+    ase
+    numpy
+    packaging
+    scipy
+  ];
+
+  optional-dependencies = {
+    cli = [
+      argcomplete
+    ];
+    dislocation = [
+      atomman
+      nglview
+      ovito
+    ];
+    docs = [
+      jupytext
+      # matscipy
+      myst-nb
+      numpydoc
+      pydata-sphinx-theme
+      sphinx
+      sphinx-copybutton
+      sphinx-rtd-theme
+      sphinxcontrib-spelling
+    ];
+  };
+
+  pythonImportsCheck = [ "matscipy" ];
+
+  nativeCheckInputs = [
+    pytest-subtests
+    pytest-timeout
+    pytest-xdist
+    pytestCheckHook
+    sympy
+  ];
+
+  preCheck = ''
+    rm -rf matscipy
+  '';
+
+  disabledTestPaths = [
+    # The CLI tests look for the source scripts under `../matscipy/cli` relative to the test
+    # directory, which we remove in `preCheck` so that tests run against the installed package.
+    "tests/test_electrochemistry_cli.py"
+  ]
+  ++ lib.optionals (pythonAtLeast "3.14") [
+    # ValueError: cannot resize an array that may be referenced by another object
+    "tests/manybody/test_newmb.py"
+    "tests/test_neighbours.py"
+  ];
+
+  disabledTests = [
+    # Numerical assertion failure
+    "test_birch_constants"
+
+    # numpy 2 / ase 3.28 incompatibilities in matscipy 1.2.0
+    # `ase.phonons` finite-difference reference no longer matches
+    "test_hessian_monoatomic"
+    "test_hessian_amorphous_alloy"
+    "test_hessian_crystalline_alloy"
+
+    # TypeError: only 0-dimensional arrays can be converted to Python scalars
+    "test_eam_read_write"
+
+    # AttributeError: 'Log' object has no attribute 'close'
+    "test_logger"
+    "test_usage"
+  ]
+  ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) [
+    # AssertionError: assert np.False (numerical precision)
+    "test_fixed_line_atoms"
+  ]
+  ++ lib.optionals (pythonAtLeast "3.14") [
+    # ValueError: cannot resize an array that may be referenced by another object
+    "test_harmonic_bond"
+    "test_read_molecules_from_atoms"
+    "test_read_molecules_from_lammps_data"
+    "test_read_write_lammps_data"
+  ];
+
+  meta = {
+    description = "Materials science with Python at the atomic-scale";
+    homepage = "https://github.com/libAtoms/matscipy";
+    changelog = "https://github.com/libAtoms/matscipy/blob/${finalAttrs.src.tag}/ChangeLog.md";
+    license = lib.licenses.lgpl21Only;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+  };
+})
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 22c03dc51d65..66728b94791e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9752,6 +9752,8 @@ self: super: with self; {
 
   matrix-nio = callPackage ../development/python-modules/matrix-nio { };
 
+  matscipy = callPackage ../development/python-modules/matscipy { };
+
   matter-ble-proxy = callPackage ../development/python-modules/matter-ble-proxy { };
 
   matter-python-client = callPackage ../development/python-modules/matter-python-client { };