refactor(core): move src/core to src/native (#12065)

This PR depends on #12063.

Rename src/core to src/native. This is laying ground as a [following
PR](#11839) will need to
import native code in `ddtrace.__init__.py`. Without this change this
would create a dependency loop between `ddtrace` & `ddtrace.core`
through `event_hub.py`.

This PR only renames files, so a non-regression test is the only thing
needed.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

.github/workflows/rust-ci.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        extension: ["src/core"]
+        extension: ["src/native"]
     steps:
       - uses: actions/checkout@v4
         with:

ddtrace/internal/core/__init__.py

@@ -115,7 +115,6 @@ def _on_jsonify_context_started_flask(ctx):
 
 from ..utils.deprecations import DDTraceDeprecationWarning
 from . import event_hub  # noqa:F401
-from ._core import DDSketch  # noqa:F401
 from .event_hub import EventResultDict  # noqa:F401
 from .event_hub import dispatch
 from .event_hub import dispatch_with_results  # noqa:F401

ddtrace/internal/datastreams/processor.py

@@ -20,7 +20,7 @@
 from ddtrace.internal import compat
 from ddtrace.internal.atexit import register_on_exit_signal
 from ddtrace.internal.constants import DEFAULT_SERVICE_NAME
-from ddtrace.internal.core import DDSketch
+from ddtrace.internal.native import DDSketch
 from ddtrace.internal.utils.retry import fibonacci_backoff_with_jitter
 
 from .._encoding import packb

ddtrace/internal/native/__init__.py

@@ -0,0 +1 @@
+from ._native import DDSketch  # noqa: F401

ddtrace/internal/processor/stats.py

@@ -8,7 +8,7 @@
 from ddtrace._trace.processor import SpanProcessor
 from ddtrace._trace.span import _is_top_level
 from ddtrace.internal import compat
-from ddtrace.internal.core import DDSketch
+from ddtrace.internal.native import DDSketch
 from ddtrace.internal.utils.retry import fibonacci_backoff_with_jitter
 
 from ...constants import SPAN_MEASURED_KEY

setup.py

@@ -59,7 +59,7 @@
 
 LIBDDWAF_VERSION = "1.22.0"
 
-# DEV: update this accordingly when src/core upgrades libdatadog dependency.
+# DEV: update this accordingly when src/native upgrades libdatadog dependency.
 # libdatadog v15.0.0 requires rust 1.78.
 RUST_MINIMUM_VERSION = "1.78"
 
@@ -660,8 +660,8 @@ def get_exts_for(name):
     + get_exts_for("psutil"),
     rust_extensions=[
         RustExtension(
-            "ddtrace.internal.core._core",
-            path="src/core/Cargo.toml",
+            "ddtrace.internal.native._native",
+            path="src/native/Cargo.toml",
             py_limited_api="auto",
             binding=Binding.PyO3,
             debug=os.getenv("_DD_RUSTC_DEBUG") == "1",

src/core/Cargo.toml → src/native/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "ddtrace-core"
+name = "ddtrace-native"
 version = "0.1.0"
 edition = "2021"
 
@@ -16,7 +16,7 @@ datadog-ddsketch = { git = "https://github.com/DataDog/libdatadog", rev = "v15.0
 pyo3-build-config = "0.21.2"
 
 [lib]
-name = "_core"
+name = "_native"
 path = "lib.rs"
 crate-type = ["cdylib"]
 

src/core/ddsketch.rs → src/native/ddsketch.rs

@@ -4,7 +4,7 @@ use pyo3::types::PyBytes;
 
 use datadog_ddsketch::DDSketch;
 
-#[pyclass(name = "DDSketch", module = "ddtrace.internal._core")]
+#[pyclass(name = "DDSketch", module = "ddtrace.internal._native")]
 pub struct DDSketchPy {
     ddsketch: DDSketch,
 }

src/core/lib.rs → src/native/lib.rs

@@ -3,7 +3,7 @@ mod ddsketch;
 use pyo3::prelude::*;
 
 #[pymodule]
-fn _core(m: &Bound<'_, PyModule>) -> PyResult<()> {
+fn _native(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<ddsketch::DDSketchPy>()?;
     Ok(())
 }

tests/suitespec.yml

@@ -62,6 +62,7 @@ components:
     - ddtrace/internal/logger.py
     - ddtrace/internal/metrics.py
     - ddtrace/internal/module.py
+    - ddtrace/internal/native/*
     - ddtrace/internal/packages.py
     - ddtrace/internal/third-party.tar.gz
     - ddtrace/internal/periodic.py
@@ -76,7 +77,7 @@ components:
     - ddtrace/py.typed
     - ddtrace/version.py
     - ddtrace/settings/config.py
-    - src/core/*
+    - src/native/*
   datastreams:
     - ddtrace/internal/datastreams/*
     - ddtrace/data_streams.py