build(nix): Package gguf-py (#5664)

* style: format with nixfmt/rfc101-style

* build(nix): Package gguf-py

* build(nix): Refactor to new scope for gguf-py

* build(nix): Exclude gguf-py from devShells

* build(nix): Refactor gguf-py derivation to take in exact deps

* build(nix): Enable pytestCheckHook and pythonImportsCheck for gguf-py

* build(python): Package python scripts with pyproject.toml

* chore: Cleanup

* dev(nix): Break up python/C devShells

* build(python): Relax pytorch version constraint

Nix has an older version

* chore: Move cmake to nativeBuildInputs for devShell

* fmt: Reconcile formatting with rebase

* style: nix fmt

* cleanup: Remove unncessary __init__.py

* chore: Suggestions from review

- Filter out non-source files from llama-scripts flake derivation
- Clean up unused closure
- Remove scripts devShell

* revert: Bad changes

* dev: Simplify devShells, restore the -extra devShell

* build(nix): Add pyyaml for gguf-py

* chore: Remove some unused bindings

* dev: Add tiktoken to -extra devShells

.devops/nix/python-scripts.nix

@@ -0,0 +1,66 @@
+{
+  lib,
+  stdenv,
+  buildPythonPackage,
+  poetry-core,
+  mkShell,
+  python3Packages,
+  gguf-py,
+}@inputs:
+
+let
+  llama-python-deps = with python3Packages; [
+    numpy
+    sentencepiece
+    transformers
+    protobuf
+    torchWithoutCuda
+    gguf-py
+    tqdm
+
+    # for scripts/compare-llama-bench.py
+    gitpython
+    tabulate
+
+    # for examples/pydantic-models-to-grammar-examples.py
+    docstring-parser
+    pydantic
+
+  ];
+
+  llama-python-test-deps = with python3Packages; [
+    # Server bench
+    matplotlib
+
+    # server tests
+    openai
+    behave
+    prometheus-client
+  ];
+in
+
+buildPythonPackage ({
+  pname = "llama-scripts";
+  version = "0.0.0";
+  pyproject = true;
+
+  # NOTE: The files filtered out here are not visible in the build sandbox, neither
+  # do they affect the output hash. They can be modified without triggering a rebuild.
+  src = lib.cleanSourceWith {
+    filter =
+      name: type:
+      let
+        any = builtins.any (x: x);
+        baseName = builtins.baseNameOf name;
+      in
+      any [
+        (lib.hasSuffix ".py" name)
+        (baseName == "README.md")
+        (baseName == "pyproject.toml")
+      ];
+    src = lib.cleanSource ../../.;
+  };
+  nativeBuildInputs = [ poetry-core ];
+  nativeCheckInputs = llama-python-test-deps;
+  dependencies = llama-python-deps;
+})