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btkostner
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This replaces #550. It adds code attributes to all Elixir macro calls. This information is gathered at compile time, and then merged with the start opt attributes at runtime. I created a new public function to format these attributes in case down the line we want to format them differently (like removing the "Elixir" prefix from namespace) and in case other libraries need them while not using the macros.

The end result is you get these attributes for the Elixir Tracer macros: code.filepath, code.function, code.lineno, code.namespace.

@doc false
@spec merge_start_opts(OpenTelemetry.Span.start_opts(), OpenTelemetry.attributes_map()) ::
OpenTelemetry.Span.start_opts()
def merge_start_opts(start_opts, builtin_attributes) do
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I left this public but undocumented. Not sure if we want to document and make it part of the public API

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codecov bot commented Dec 5, 2024

Codecov Report

❌ Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 18.45%. Comparing base (9f7affe) to head (543b8c0).
⚠️ Report is 142 commits behind head on main.

Files with missing lines Patch % Lines
...pps/opentelemetry_api/lib/open_telemetry/tracer.ex 60.00% 2 Missing ⚠️
...opentelemetry_api/lib/open_telemetry/attributes.ex 88.88% 1 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main     #808      +/-   ##
==========================================
+ Coverage   17.32%   18.45%   +1.13%     
==========================================
  Files          24       25       +1     
  Lines         710      726      +16     
==========================================
+ Hits          123      134      +11     
- Misses        587      592       +5     
Flag Coverage Δ
api 18.45% <78.57%> (+1.13%) ⬆️
elixir 18.45% <78.57%> (+1.13%) ⬆️

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@tsloughter
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Sorry, I missed that there was a new PR. I'll get this reviewed soon.

@@ -0,0 +1,74 @@
defmodule OpenTelemetry.Attributes do
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There is an otel_attributes module that something named OpenTelemetry.Attributes should be the Elixir equivalent of. While that isn't needed I think this should be named different anyway. Maybe CodeAttributes?

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Good point. I can update that.

@tsloughter
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I'm still torn on if this needs a configuration option. @bryannaegele thoughts?

I don't like the idea of having to check an option everytime a span is made, but not sure people wouldn't prefer to be able to turn this off for some reason. Nothing else adds attributes to your spans automatically right now, right?

I suppose we could make it optional later if anyone actually cares.

@btkostner
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Let me see if I can pull some examples from other ecosystems and see what they do 👀

@tsloughter
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@btkostner thanks!

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Oh and last I checked, I think months ago, no one else implemented these attributes at all :)

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2 participants