Remove usage of pkg_resources (#3047)

* Remove usage of pkg_resources

Fixes #2927

* WIP

* WIP

* Add test case for _load_providers

* Fix test case for 3.9

* Fix lint

* Fix 3.7 sdk tests

* Fix lint

* Fix lint

* Fix mypy again

* WIP

* WIP

* WIP

* WIP

* Move to module

* Fix SDK

* Fix mypy

* Refactor load call

* Fix mypy

* Fix lint

* Fix opencensus exporter

* Refactor implementation

* Add missing dependency

* Undo changes in shim

* Fix dependency

* Revert "Undo changes in shim"

This reverts commit bd82b8f.

* Update dependencies

* Update dependency for opencensus exporter

* Add descriptive error

Author: ocelotl

exporter/opentelemetry-exporter-opencensus/pyproject.toml

@@ -28,8 +28,8 @@ classifiers = [
 dependencies = [
   "grpcio >= 1.0.0, < 2.0.0",
   "opencensus-proto >= 0.1.0, < 1.0.0",
-  "opentelemetry-api ~= 1.3",
-  "opentelemetry-sdk ~= 1.3",
+  "opentelemetry-api >= 1.16.0.dev",
+  "opentelemetry-sdk >= 1.15",
   "protobuf ~= 3.13",
   "setuptools >= 16.0",
 ]

exporter/opentelemetry-exporter-opencensus/src/opentelemetry/exporter/opencensus/util.py

@@ -12,11 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
-import socket
-import time
+from os import getpid
+from socket import gethostname
+from time import time
 
-import pkg_resources
+# pylint: disable=wrong-import-position
 from google.protobuf.timestamp_pb2 import Timestamp
 from opencensus.proto.agent.common.v1 import common_pb2
 from opencensus.proto.trace.v1 import trace_pb2
@@ -25,10 +25,9 @@
     __version__ as opencensusexporter_exporter_version,
 )
 from opentelemetry.trace import SpanKind
+from opentelemetry.util._importlib_metadata import version
 
-OPENTELEMETRY_VERSION = pkg_resources.get_distribution(
-    "opentelemetry-api"
-).version
+OPENTELEMETRY_VERSION = version("opentelemetry-api")
 
 
 def proto_timestamp_from_time_ns(time_ns):
@@ -88,11 +87,9 @@ def get_node(service_name, host_name):
     """
     return common_pb2.Node(
         identifier=common_pb2.ProcessIdentifier(
-            host_name=socket.gethostname() if host_name is None else host_name,
-            pid=os.getpid(),
-            start_timestamp=proto_timestamp_from_time_ns(
-                int(time.time() * 1e9)
-            ),
+            host_name=gethostname() if host_name is None else host_name,
+            pid=getpid(),
+            start_timestamp=proto_timestamp_from_time_ns(int(time() * 1e9)),
         ),
         library_info=common_pb2.LibraryInfo(
             language=common_pb2.LibraryInfo.Language.Value("PYTHON"),

exporter/opentelemetry-exporter-zipkin-json/tests/encoder/test_v1_json.py

@@ -28,7 +28,10 @@
 )
 from opentelemetry.trace import TraceFlags, format_span_id, format_trace_id
 
-from .common_tests import TEST_SERVICE_NAME, CommonEncoderTestCases
+from .common_tests import (  # pylint: disable=import-error
+    TEST_SERVICE_NAME,
+    CommonEncoderTestCases,
+)
 
 
 # pylint: disable=protected-access

exporter/opentelemetry-exporter-zipkin-json/tests/encoder/test_v2_json.py

@@ -28,7 +28,10 @@
 )
 from opentelemetry.trace import SpanKind, TraceFlags
 
-from .common_tests import TEST_SERVICE_NAME, CommonEncoderTestCases
+from .common_tests import (  # pylint: disable=import-error
+    TEST_SERVICE_NAME,
+    CommonEncoderTestCases,
+)
 
 
 # pylint: disable=protected-access

exporter/opentelemetry-exporter-zipkin-proto-http/tests/encoder/test_v2_protobuf.py

@@ -28,7 +28,10 @@
 )
 from opentelemetry.trace import SpanKind
 
-from .common_tests import TEST_SERVICE_NAME, CommonEncoderTestCases
+from .common_tests import (  # pylint: disable=import-error
+    TEST_SERVICE_NAME,
+    CommonEncoderTestCases,
+)
 
 
 # pylint: disable=protected-access

opentelemetry-api/pyproject.toml

@@ -27,6 +27,7 @@ classifiers = [
 dependencies = [
     "Deprecated >= 1.2.6",
     "setuptools >= 16.0",
+    "importlib-metadata >= 5.0.0; python_version=='3.7'"
 ]
 dynamic = [
     "version",

opentelemetry-api/src/opentelemetry/context/__init__.py

@@ -19,10 +19,10 @@
 from os import environ
 from uuid import uuid4
 
-from pkg_resources import iter_entry_points
-
-from opentelemetry.context.context import Context, _RuntimeContext
+# pylint: disable=wrong-import-position
+from opentelemetry.context.context import Context, _RuntimeContext  # noqa
 from opentelemetry.environment_variables import OTEL_PYTHON_CONTEXT
+from opentelemetry.util._importlib_metadata import entry_points
 
 logger = logging.getLogger(__name__)
 _RUNTIME_CONTEXT = None  # type: typing.Optional[_RuntimeContext]
@@ -41,27 +41,33 @@ def _load_runtime_context(func: _F) -> _F:
     @wraps(func)  # type: ignore[misc]
     def wrapper(  # type: ignore[misc]
         *args: typing.Tuple[typing.Any, typing.Any],
-        **kwargs: typing.Dict[typing.Any, typing.Any]
+        **kwargs: typing.Dict[typing.Any, typing.Any],
     ) -> typing.Optional[typing.Any]:
         global _RUNTIME_CONTEXT  # pylint: disable=global-statement
 
         with _RUNTIME_CONTEXT_LOCK:
             if _RUNTIME_CONTEXT is None:
-                # FIXME use a better implementation of a configuration manager to avoid having
-                # to get configuration values straight from environment variables
+                # FIXME use a better implementation of a configuration manager
+                # to avoid having to get configuration values straight from
+                # environment variables
                 default_context = "contextvars_context"
 
                 configured_context = environ.get(
                     OTEL_PYTHON_CONTEXT, default_context
                 )  # type: str
                 try:
-                    _RUNTIME_CONTEXT = next(
-                        iter_entry_points(
-                            "opentelemetry_context", configured_context
+
+                    _RUNTIME_CONTEXT = next(  # type: ignore
+                        iter(  # type: ignore
+                            entry_points(  # type: ignore
+                                group="opentelemetry_context",
+                                name=configured_context,
+                            )
                         )
                     ).load()()
+
                 except Exception:  # pylint: disable=broad-except
-                    logger.error(
+                    logger.exception(
                         "Failed to load context: %s", configured_context
                     )
         return func(*args, **kwargs)  # type: ignore[misc]

opentelemetry-api/src/opentelemetry/metrics/_internal/__init__.py

@@ -119,7 +119,7 @@ def get_meter(
 
             version: Optional. The version string of the
                 instrumenting library.  Usually this should be the same as
-                ``pkg_resources.get_distribution(instrumenting_library_name).version``.
+                ``importlib.metadata.version(instrumenting_library_name)``.
 
             schema_url: Optional. Specifies the Schema URL of the emitted telemetry.
         """

opentelemetry-api/src/opentelemetry/propagate/__init__.py

@@ -68,22 +68,21 @@ def example_route():
     https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/context/api-propagators.md
 """
 
-import typing
 from logging import getLogger
 from os import environ
-
-from pkg_resources import iter_entry_points
+from typing import Optional
 
 from opentelemetry.context.context import Context
 from opentelemetry.environment_variables import OTEL_PROPAGATORS
 from opentelemetry.propagators import composite, textmap
+from opentelemetry.util._importlib_metadata import entry_points
 
 logger = getLogger(__name__)
 
 
 def extract(
     carrier: textmap.CarrierT,
-    context: typing.Optional[Context] = None,
+    context: Optional[Context] = None,
     getter: textmap.Getter[textmap.CarrierT] = textmap.default_getter,
 ) -> Context:
     """Uses the configured propagator to extract a Context from the carrier.
@@ -104,7 +103,7 @@ def extract(
 
 def inject(
     carrier: textmap.CarrierT,
-    context: typing.Optional[Context] = None,
+    context: Optional[Context] = None,
     setter: textmap.Setter[textmap.CarrierT] = textmap.default_setter,
 ) -> None:
     """Uses the configured propagator to inject a Context into the carrier.
@@ -129,20 +128,30 @@ def inject(
     "tracecontext,baggage",
 )
 
+
 for propagator in environ_propagators.split(","):
     propagator = propagator.strip()
+
     try:
+
         propagators.append(  # type: ignore
             next(  # type: ignore
-                iter_entry_points("opentelemetry_propagator", propagator)
+                iter(  # type: ignore
+                    entry_points(  # type: ignore
+                        group="opentelemetry_propagator",
+                        name=propagator,
+                    )
+                )
             ).load()()
         )
+
     except Exception:  # pylint: disable=broad-except
         logger.exception(
-            "Failed to load configured propagator `%s`", propagator
+            "Failed to load configured propagator: %s", propagator
         )
         raise
 
+
 _HTTP_TEXT_FORMAT = composite.CompositePropagator(propagators)  # type: ignore
 
 

opentelemetry-api/src/opentelemetry/trace/__init__.py

@@ -216,7 +216,7 @@ def get_tracer(
 
             instrumenting_library_version: Optional. The version string of the
                 instrumenting library.  Usually this should be the same as
-                ``pkg_resources.get_distribution(instrumenting_library_name).version``.
+                ``importlib.metadata.version(instrumenting_library_name)``.
 
             schema_url: Optional. Specifies the Schema URL of the emitted telemetry.
         """