feat: allow get_kernel to log telemetry. (#167)

* feat: allow get_kernel to log telemetry.

* Apply suggestions from code review

Co-authored-by: Daniël de Kok <me@danieldk.eu>

* doc

---------

Co-authored-by: Daniël de Kok <me@danieldk.eu>

docs/source/faq.md

@@ -39,3 +39,13 @@ The approach of `forward`-replacement is the least invasive, because
 it preserves the original model graph. It is also reversible, since
 even though the `forward` of a layer _instance_ might be replaced,
 the corresponding class still has the original `forward`.
+
+## Misc
+
+### How can I disable kernel reporting in the user-agent?
+
+By default, we collect telemetry when a call to `get_kernel()` is made.
+This only includes the `kernels` version, `torch` version, and the build
+information for the kernel being requested.
+
+You can disable this by setting `export DISABLE_TELEMETRY=yes`.

src/kernels/utils.py

@@ -11,7 +11,7 @@ import sys
 from importlib.metadata import Distribution
 from pathlib import Path
 from types import ModuleType
-from typing import Dict, List, Optional, Tuple
+from typing import Dict, List, Optional, Tuple, Union
 
 from huggingface_hub import file_exists, snapshot_download
 from packaging.version import parse
@@ -19,6 +19,8 @@ from packaging.version import parse
 from kernels._versions import select_revision_or_version
 from kernels.lockfile import KernelLock, VariantLock
 
+ENV_VARS_TRUE_VALUES = {"1", "ON", "YES", "TRUE"}
+
 
 def _get_cache_dir() -> Optional[str]:
     """Returns the kernels cache directory."""
@@ -108,6 +110,7 @@ def install_kernel(
     revision: str,
     local_files_only: bool = False,
     variant_locks: Optional[Dict[str, VariantLock]] = None,
+    user_agent: Optional[Union[str, dict]] = None,
 ) -> Tuple[str, Path]:
     """
     Download a kernel for the current environment to the cache.
@@ -123,6 +126,8 @@ def install_kernel(
             Whether to only use local files and not download from the Hub.
         variant_locks (`Dict[str, VariantLock]`, *optional*):
             Optional dictionary of variant locks for validation.
+        user_agent (`Union[str, dict]`, *optional*):
+            The `user_agent` info to pass to `snapshot_download()` for internal telemetry.
 
     Returns:
         `Tuple[str, Path]`: A tuple containing the package name and the path to the variant directory.
@@ -130,6 +135,7 @@ def install_kernel(
     package_name = package_name_from_repo_id(repo_id)
     variant = build_variant()
     universal_variant = universal_build_variant()
+    user_agent = _get_user_agent(user_agent=user_agent)
     repo_path = Path(
         snapshot_download(
             repo_id,
@@ -137,6 +143,7 @@ def install_kernel(
             cache_dir=CACHE_DIR,
             revision=revision,
             local_files_only=local_files_only,
+            user_agent=user_agent,
         )
     )
 
@@ -213,7 +220,10 @@ def install_kernel_all_variants(
 
 
 def get_kernel(
-    repo_id: str, revision: Optional[str] = None, version: Optional[str] = None
+    repo_id: str,
+    revision: Optional[str] = None,
+    version: Optional[str] = None,
+    user_agent: Optional[Union[str, dict]] = None,
 ) -> ModuleType:
     """
     Load a kernel from the kernel hub.
@@ -229,6 +239,8 @@ def get_kernel(
         version (`str`, *optional*):
             The kernel version to download. This can be a Python version specifier, such as `">=1.0.0,<2.0.0"`.
             Cannot be used together with `revision`.
+        user_agent (`Union[str, dict]`, *optional*):
+            The `user_agent` info to pass to `snapshot_download()` for internal telemetry.
 
     Returns:
         `ModuleType`: The imported kernel module.
@@ -245,7 +257,9 @@ def get_kernel(
         ```
     """
     revision = select_revision_or_version(repo_id, revision, version)
-    package_name, package_path = install_kernel(repo_id, revision=revision)
+    package_name, package_path = install_kernel(
+        repo_id, revision=revision, user_agent=user_agent
+    )
     return import_from_path(package_name, package_path / package_name / "__init__.py")
 
 
@@ -501,3 +515,24 @@ def git_hash_object(data: bytes, object_type: str = "blob"):
 
 def package_name_from_repo_id(repo_id: str) -> str:
     return repo_id.split("/")[-1].replace("-", "_")
+
+
+def _get_user_agent(
+    user_agent: Optional[Union[dict, str]] = None,
+) -> Union[None, dict, str]:
+    import torch
+
+    from . import __version__
+
+    if os.getenv("DISABLE_TELEMETRY", "false").upper() in ENV_VARS_TRUE_VALUES:
+        return None
+
+    if user_agent is None:
+        user_agent = {
+            "kernels": __version__,
+            "torch": torch.__version__,
+            "build_variant": build_variant(),
+            "file_type": "kernel",
+        }
+
+    return user_agent