feat(profiling): Add profile context to transaction (#1860)

This adds the profile context to the transaction envelope.
See https://github.com/getsentry/rfcs/blob/main/text/0047-introduce-profile-context.md

Author: Zylphrex

sentry_sdk/profiler.py

@@ -103,6 +103,11 @@
         },
     )
 
+    ProfileContext = TypedDict(
+        "ProfileContext",
+        {"profile_id": str},
+    )
+
 try:
     from gevent.monkey import is_module_patched  # type: ignore
 except ImportError:
@@ -343,6 +348,7 @@ def __init__(
         self.start_ns = 0  # type: int
         self.stop_ns = 0  # type: int
         self.active = False  # type: bool
+        self.event_id = uuid.uuid4().hex  # type: str
 
         self.indexed_frames = {}  # type: Dict[RawFrame, int]
         self.indexed_stacks = {}  # type: Dict[RawStackId, int]
@@ -352,6 +358,10 @@ def __init__(
 
         transaction._profile = self
 
+    def get_profile_context(self):
+        # type: () -> ProfileContext
+        return {"profile_id": self.event_id}
+
     def __enter__(self):
         # type: () -> None
         hub = self.hub or sentry_sdk.Hub.current
@@ -444,7 +454,7 @@ def to_json(self, event_opt, options):
 
         return {
             "environment": event_opt.get("environment"),
-            "event_id": uuid.uuid4().hex,
+            "event_id": self.event_id,
             "platform": "python",
             "profile": profile,
             "release": event_opt.get("release", ""),

sentry_sdk/tracing.py

@@ -709,6 +709,7 @@ def finish(self, hub=None, end_timestamp=None):
 
         if hub.client is not None and self._profile is not None:
             event["profile"] = self._profile
+            contexts.update({"profile": self._profile.get_profile_context()})
 
         if has_custom_measurements_enabled():
             event["measurements"] = self._measurements

tests/integrations/wsgi/test_wsgi.py

@@ -323,3 +323,36 @@ def test_app(environ, start_response):
         for item in envelope.items:
             count_item_types[item.type] += 1
     assert count_item_types["profile"] == profile_count
+
+
+def test_profile_context_sent(sentry_init, capture_envelopes, teardown_profiling):
+    def test_app(environ, start_response):
+        start_response("200 OK", [])
+        return ["Go get the ball! Good dog!"]
+
+    sentry_init(
+        traces_sample_rate=1.0,
+        _experiments={"profiles_sample_rate": 1.0},
+    )
+    app = SentryWsgiMiddleware(test_app)
+    envelopes = capture_envelopes()
+
+    client = Client(app)
+    client.get("/")
+
+    transaction = None
+    profile = None
+    for envelope in envelopes:
+        for item in envelope.items:
+            if item.type == "profile":
+                assert profile is None  # should only have 1 profile
+                profile = item
+            elif item.type == "transaction":
+                assert transaction is None  # should only have 1 transaction
+                transaction = item
+
+    assert transaction is not None
+    assert profile is not None
+    assert transaction.payload.json["contexts"]["profile"] == {
+        "profile_id": profile.payload.json["event_id"],
+    }