Add ollama package (#43655)

* Added package to build Ollama
* Update package.py
  Add license and documentation
* [@spackbot] updating style on behalf of teaguesterling

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

@@ -0,0 +1,54 @@
+# 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)
+
+import spack.build_systems.go
+from spack.package import *
+
+
+class Ollama(GoPackage):
+    """Run Llama 2, Code Llama, and other models. Customize and create your own."""
+
+    homepage = "https://ollama.com"
+    git = "https://github.com/ollama/ollama.git"
+
+    maintainers("teaguesterling")
+
+    # We're using commit IDs because the `go generate` process will fail for some
+    # dependencies that expect to be within a git repo. This is also an issue with
+    # cached downloads, but I don't know how to fix that yet
+    version("0.1.31", commit="dc011d16b9ff160c0be3829fc39a43054f0315d0", submodules=True)
+    # This is the last verified non-preview version as of 20240413
+    version(
+        "0.1.30",
+        commit="756c2575535641f1b96d94b4214941b90f4c30c7",
+        submodules=True,
+        preferred=True,
+    )
+
+    license("MIT", checked_by="teaguesterling")
+
+    depends_on("cmake", type="build")
+    depends_on("go", type="build")
+    depends_on("gcc", type="build")
+    depends_on("git", type="build")
+    depends_on("ccache", type="build")
+
+
+class GoBuilder(spack.build_systems.go.GoBuilder):
+    phases = ("generate", "build", "install")
+
+    @property
+    def generate_args(self):
+        """Arguments for ``go generate``."""
+        return ["./..."]
+
+    def generate(self, pkg, spec, prefix):
+        """Runs ``go generate`` in the source directory"""
+        import inspect
+
+        import llnl.util.filesystem as fs
+
+        with fs.working_dir(self.build_directory):
+            inspect.getmodule(pkg).go("generate", *self.generate_args)