halide: new package (#35254)

* add halide package.

* some style changes.

* small fix

* Update var/spack/repos/builtin/packages/halide/package.py

Co-authored-by: Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com>

* Update var/spack/repos/builtin/packages/halide/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update var/spack/repos/builtin/packages/halide/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update package.py

add comment to requirements.txt

* Update package.py

Fix version order.

* Update package.py

style

* Update package.py

Removed unneeded vars.

* Update var/spack/repos/builtin/packages/halide/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update var/spack/repos/builtin/packages/halide/package.py

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* Update package.py

Fix some deps

* Update package.py

* Fix finding llvm cmake info

* Update package.py

---------

Co-authored-by: Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com>
Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

var/spack/repos/builtin/packages/halide/package.py

@@ -0,0 +1,74 @@
+# Copyright 2013-2022 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 Halide(CMakePackage, PythonExtension):
+    """Halide is a programming language designed to make it easier to write
+    high-performance image and array processing code on modern machines."""
+
+    homepage = "https://halide-lang.org/"
+    url = "https://github.com/halide/Halide/archive/refs/tags/v14.0.0.tar.gz"
+    git = "https://github.com/halide/Halide.git"
+    maintainers = ["wraith1995"]
+    version("main", branch="main")
+    version("14.0.0", sha256="f9fc9765217cbd10e3a3e3883a60fc8f2dbbeaac634b45c789577a8a87999a01")
+    variant(
+        "build_type",
+        default="Release",
+        description="The build type to build",
+        values=("Release", "Debug", "RelWithDebInfo"),
+    )
+    generator = "Ninja"
+    variant("python", default=False, description="Install python bindings")
+    variant("tutorials", default=False, description="Install the Halide Tutorials.")
+    variant("utils", default=False, description="Install the Halide Utilities.")
+    variant("tests", default=False, description="Build and Run Halide Tests and Apps.")
+    extends("python", when="+python")
+
+    _targets = " targets=arm,x86,nvptx,aarch64,hexagon,webassembly "
+    depends_on("cmake@3.22:", type="build")
+    depends_on("ninja", type="build")
+    depends_on(
+        "llvm@14.0.0:14+clang+lld" + _targets + " build_type=Release",
+        type=("link", "run"),
+    )
+    depends_on("libjpeg", type=("build", "link", "run"))
+    depends_on("libpng", type=("build", "link", "run"))
+
+    depends_on("python@3.8:", type=("build", "link", "run"), when="+python")
+    # See https://github.com/halide/Halide/blob/main/requirements.txt
+    depends_on("py-pybind11@2.6.2", type="build", when="+python")
+    depends_on("py-setuptools@43:", type="build", when="+python")
+    depends_on("py-scikit-build", type="build", when="+python")
+    depends_on("py-wheel", type="build", when="+python")
+
+    depends_on("py-imageio", type=("build", "run"), when="+python")
+    depends_on("pil", type=("build", "run"), when="+python")
+    depends_on("py-scipy", type=("build", "run"), when="+python")
+    depends_on("py-numpy", type=("build", "run"), when="+python")
+
+    def cmake_args(self):
+        spec = self.spec
+        llvm_config = Executable(spec["llvm"].prefix.bin.join("llvm-config"))
+        llvmdir = llvm_config("--cmakedir", output=str)
+        args = [
+            self.define("Python3_EXECUTABLE", spec["python"].command.path),
+            self.define("PYBIND11_USE_FETCHCONTENT", False),
+            self.define("LLVM_DIR", llvmdir),
+            self.define_from_variant("WITH_TESTS", "tests"),
+            self.define_from_variant("WITH_TUTORIALS", "tutorials"),
+            self.define_from_variant("WITH_UTILS", "utils"),
+            self.define_from_variant("WITH_PYTHON_BINDINGS", "python"),
+            self.define("WITH_WABT", False),
+        ]
+        if "+python" in spec:
+            args += [
+                self.define(
+                    "Halide_INSTALL_PYTHONDIR",
+                    python_platlib,
+                )
+            ]
+        return args