Add true auto-instrumentation support to opentelemetry-instrument

This commit extends the instrument command so it automatically
configures tracing with a provider, span processor and exporter. Most of
the component used can be customized with env vars or CLI arguments.

Details can be found on opentelemetry-instrumentation's README package.

Fixes open-telemetry#663

opentelemetry-instrumentation/README.rst

@@ -51,10 +51,18 @@ The command supports the following configuration options as CLI arguments and en
 * ``--exporter`` or ``OTEL_EXPORTER``
 
 Used to specify which trace exporter to use. Can be set to one or more
+<<<<<<< HEAD
 of the well-known exporter names (see below).
 
     - Defaults to `otlp`.
     - Can be set to `none` to disable automatic tracer initialization. 
+=======
+of the well-known exporter names (see below) or a fully
+qualified Python import path to a span  exporter implementation.
+
+    - Defaults to `otlp`.
+    - Can be set to `none` to disbale automatic tracer initialization. 
+>>>>>>> Add true auto-instrumentation support to opentelemetry-instrument
 
 You can pass multiple values to configure multiple exporters e.g, ``zipkin,prometheus`` 
 
@@ -79,11 +87,19 @@ check `here <https://opentelemetry-python.readthedocs.io/en/stable/index.html#in
 
 Examples
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+<<<<<<< HEAD
+
+::
+
+    opentelemetry-instrument -e otlp flask run --port=3000
+
+=======
 
 ::
 
     opentelemetry-instrument -e otlp flask run --port=3000
 
+>>>>>>> Add true auto-instrumentation support to opentelemetry-instrument
 The above command will pass ``-e otlp`` to the instrument command and ``--port=3000`` to ``flask run``.
 
 ::

opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py

@@ -46,7 +46,11 @@ def initialize():
 if (
     hasattr(sys, "argv")
     and sys.argv[0].split(os.path.sep)[-1] == "celery"
+<<<<<<< HEAD
     and "worker" in sys.argv[1:]
+=======
+    and "worker" in sys.argv
+>>>>>>> Add true auto-instrumentation support to opentelemetry-instrument
 ):
     from celery.signals import worker_process_init  # pylint:disable=E0401