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opentelemetry-erlang/CONTRIBUTING.md

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Development Setup Guide for Erlang Repository

Introduction

Welcome to the Erlang Repository! 🎉

This guide aims to assist contributors in setting up their local development environment. Feel free to suggest improvements or raise questions in your contributions.

Pre-requisites

To work with this repository, you'll need the following tools and dependencies:

  • Erlang/OTP Version :

  • We support the latest major release plus the prior two releases, aligning with Ericsson’s version support policy for Erlang itself.

  • For a definitive list of supported versions, refer to the erlang.yml file in this repository.

If using the Elixir API:

  • Elixir 1.14+

  • For a definitive list of supported versions, refer to the elixir.yml file in this repository.

  • Refer to the official Erlang Installation Guide for setting up Erlang.

Local Run/Build

Setting Up and Running the Project Locally

To run the project locally, follow these steps:

Start required services:

docker compose up -d

Set up Erlang/OTP and Rebar3 and Verify setup (Ensure you have the correct versions as specified in the prerequisites):

Run the compilation step to check for errors:

rebar3 compile

Testing

To execute tests, use the following commands:

Unit Tests (EUnit):

rebar3 eunit

Integration and Functional Tests (Common Test):

rebar3 ct

Test results and logs can be viewed in a browser by opening:

build/test/logs/index.html

Elixir Tests

Elixir tests are run in two places:

  1. Inside apps/opentelemetry_api/:
mix test
  1. At the top level:
mix test --no-start test/otel_tests.exs test/otel_metric_tests.exs

Contribution Rules

Please review the OpenTelemetry Specification for details on coding standards, commit message formatting, and the contribution process.

Troubleshooting Guide

Debugging Common Failures

  • Test Failures: Check the test logs in _build/test/logs/.

  • Compilation Issues: Ensure correct OTP and Rebar3 versions are installed.

  • Dialyzer Warnings: Ensure rebar3 compile completes successfully.

Developer Setup and Language Servers

For improved development experience, consider using the following Language Server Protocols (LSPs):

elp eqwalize-all

Further Help

  • If you encounter any issues or have questions, feel free to open an issue or reach out to the maintainers.
  • Join our slack channel also for further help and discussions