New package py-pyhdf (#44877)

* Add var/spack/repos/builtin/packages/py-pyhdf/package.py
* Address reviewer comments regarding dependencies for new package py-pyhdf

var/spack/repos/builtin/packages/py-pyhdf/package.py

@@ -0,0 +1,47 @@
+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class PyPyhdf(PythonPackage):
+    """pyhdf is a python wrapper around the NCSA HDF version 4 library.
+    The SD (Scientific Dataset), VS (Vdata) and V (Vgroup) APIs are
+    currently implemented. NetCDF files can also be read and modified."""
+
+    homepage = "https://github.com/fhs/pyhdf"
+    pypi = "pyhdf/pyhdf-0.10.4.tar.gz"
+    git = "https://github.com/fhs/pyhdf.git"
+
+    maintainers("climbfuji")
+
+    license("MIT")
+
+    version("master", branch="master")
+    version("0.10.4", sha256="ea09b2bdafc9be0f7f43d72ff122d8efbde61881f4da3a659b33be5e29215f93")
+
+    # Python versions
+    depends_on("py-setuptools", type="build")
+
+    # Dependencies
+    depends_on("zlib-api", type=("build", "run"))
+    depends_on("hdf@4.2", type=("build", "run"))
+    depends_on("py-numpy", type=("build", "run"))
+    depends_on("jpeg", type=("build", "run"))
+
+    def setup_build_environment(self, env):
+        inc_dirs = []
+        lib_dirs = []
+        # Strip -I and -L from spec include_flags / search_flags
+        inc_dirs.append(self.spec["zlib-api"].headers.include_flags.lstrip("-I"))
+        inc_dirs.append(self.spec["hdf"].headers.include_flags.lstrip("-I"))
+        inc_dirs.append(self.spec["jpeg"].headers.include_flags.lstrip("-I"))
+        lib_dirs.append(self.spec["zlib-api"].libs.search_flags.lstrip("-L"))
+        lib_dirs.append(self.spec["hdf"].libs.search_flags.lstrip("-L"))
+        lib_dirs.append(self.spec["jpeg"].libs.search_flags.lstrip("-L"))
+        env.set("INCLUDE_DIRS", ":".join(inc_dirs))
+        env.set("LIBRARY_DIRS", ":".join(lib_dirs))
+        if self.spec["hdf"].satisfies("@:4.1"):
+            env.set("NO_COMPRESS", "1")