Add photutils (emscripten-forge#4342)

* add basic photutils.

* Apply suggestions from code review

Co-authored-by: Isabel Paredes <iparedes314@gmail.com>

* Clean up

---------

Co-authored-by: Isabel Paredes <iparedes314@gmail.com>
Co-authored-by: Isabel Paredes <isabel.paredes@quantstack.net>

Author: MMesch

recipes/recipes_emscripten/photutils/recipe.yaml

@@ -0,0 +1,70 @@
+context:
+  name: photutils
+  version: 2.3.0
+
+package:
+  name: ${{ name }}
+  version: ${{ version }}
+
+source:
+- url: https://pypi.org/packages/source/p/photutils/photutils-${{ version }}.tar.gz
+  sha256: 947527f77794469f960d51e6fd7add2fd531b16f2369d4541b1441eb81b3d9f7
+
+build:
+  number: 0
+  script: ${{ PYTHON }} -m pip install . ${{ PIP_ARGS }}
+
+requirements:
+  build:
+    - python
+    - cross-python_${{ target_platform }}
+    - cython >=3.1.0,<4
+    - numpy
+    - ${{ compiler("c") }}
+  host:
+    - python
+    - pip
+    - setuptools >=77.0
+    - setuptools_scm >=8.0
+    - cython >=3.1.0,<4
+    - extension-helpers >=1.3,<2
+    - astropy >=5.3
+    - numpy
+  run:
+    - python
+    - numpy >=1.25
+    - astropy >=5.3
+    - scipy >=1.11.1  # Note: scipy has broken exports in emscripten-wasm32, affecting some photutils features
+    # - matplotlib >=3.8  # Available but built for emscripten-abi 3.1.73, incompatible with 4.x
+    # - regions >=0.9  # Recipe not yet available in emscripten-forge
+    # - scikit-image >=0.21  # Available but depends on matplotlib-base with incompatible emscripten-abi 3.1.73
+    # - gwcs >=0.20  # Recipe not yet available in emscripten-forge
+    # - bottleneck >=1.3.6  # Recipe not yet available in emscripten-forge
+    # - tqdm >=4.65  # Recipe not yet available in emscripten-forge (pure Python, should be easy to add)
+    # - rasterio >=1.3.7  # Recipe not yet available in emscripten-forge
+    - shapely >=2.0.0
+
+tests:
+- script: pytester
+  requirements:
+    build:
+    - pytester
+    run:
+    - pytester-run
+  files:
+    recipe:
+    - test_photutils.py
+
+about:
+  homepage: https://photutils.readthedocs.io/
+  license: BSD-3-Clause
+  license_family: BSD
+  license_file: LICENSE.rst
+  summary: An Astropy package for photometry
+  description: |
+    Photutils is an Astropy package for detection and photometry of
+    astronomical sources.
+
+extra:
+  recipe-maintainers:
+    - mmesch

recipes/recipes_emscripten/photutils/test_photutils.py

@@ -0,0 +1,25 @@
+def test_import_photutils():
+    """Test basic import of photutils package."""
+    import photutils
+    assert hasattr(photutils, '__version__')
+
+def test_import_modules():
+    # Modules that work (don't depend on astropy.nddata or scipy.sparse)
+    import photutils.background
+    import photutils.centroids
+    import photutils.detection
+    import photutils.geometry
+    import photutils.isophote
+    import photutils.morphology
+    import photutils.profiles
+    import photutils.psf
+    import photutils.psf.matching
+    import photutils.segmentation
+
+    # Modules that fail: they import astropy.nddata which imports scipy.sparse
+    # scipy.sparse triggers broken scipy._lib._ccallback_c.cpython-313-wasm32-emscripten.so
+    # Error: bad export type for 'timing_': undefined
+    #
+    # import photutils.aperture  # Uses astropy.nddata via aperture.core
+    # import photutils.datasets  # Uses astropy.nddata
+    # import photutils.utils     # Uses astropy.nddata via utils.cutouts