BLD: Exclude .so in meson build (to avoid conflicts in local testing); adjust absolute rpaths in nox environment setup

Author: ryder-davidson

meson.build

@@ -48,7 +48,7 @@ fortranobject_c = f2py_inc_dir / 'fortranobject.c'
 # ---- HDF5 dependencies
 hdf5_c = dependency('hdf5', required : true)
 hdf5f = declare_dependency(link_args : ['-lhdf5_fortran'], dependencies : [hdf5_c])
-hdf5f_hl = declare_dependency(link_args : ['-lhdf5hl_fortran'], dependencies : [hdf5_c])
+hdf5f_hl = declare_dependency(link_args : ['-lhdf5_hl_fortran'], dependencies : [hdf5_c])
 
 # Optional: OpenMP
 # omp_dep = dependency('openmp', required : false)
@@ -110,9 +110,19 @@ configure_file(
 install_subdir(
   'mapflpy',
   install_dir : py.get_install_dir(),
+  exclude_directories : ['fortran'],
   exclude_files: [
     '_version.py.in',
     '__pycache__',
     '*.pyc',
   ]
 )
+
+# Install mapflpy/fortran/__init__.py separately, so that the install_subdir
+# above can exclude the entire fortran/ directory.  Without this exclusion,
+# any compiled .so left in the source tree (e.g. from a dev install) would
+# be bundled into every wheel produced by "python -m build".
+install_data(
+  'mapflpy/fortran/__init__.py',
+  install_dir : py.get_install_dir() / 'mapflpy' / 'fortran',
+)

noxfile.py

@@ -70,7 +70,17 @@ def _build_env(session: nox.Session) -> Path:
         *pyproject["tool"][PROJECT_NAME].get("conda", []),
         channel="conda-forge"
     )
-    session.env.update(_darwin_sdk_env())
+    env_dir = Path(session.env_dir).resolve()
+    lib_dir = str(env_dir / "lib")
+    # Override CONDA_PREFIX so conda-forge gfortran's spec file uses this env's
+    # lib dir for its implicit library search paths, not the active outer env.
+    env = {"CONDA_PREFIX": str(env_dir)}
+    env.update(_darwin_sdk_env())
+    if platform.system() == "Darwin":
+        # Also pass an explicit rpath so delocate-wheel can bundle deps even
+        # when meson would otherwise embed a @loader_path-relative path.
+        env["LDFLAGS"] = (env.get("LDFLAGS", "") + f" -Wl,-rpath,{lib_dir}").strip()
+    session.env.update(env)
 
 
 def _dist_env(session: nox.Session) -> Path: