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Contributing Guide

We'd love your help!

Report a bug or requesting feature

Reporting bugs is an important contribution. Please make sure to include:

  • expected and actual behavior.
  • Node version that application is running.
  • OpenTelemetry version that application is using.
  • if possible - repro application and steps to reproduce.

How to contribute

Before you start

Please read project contribution guide for general practices for OpenTelemetry project.

Conventional commit

The Conventional Commits specification is a lightweight convention on top of commit messages. It provides an easy set of rules for creating an explicit commit history; which makes it easier to write automated tools on top of. This convention dovetails with SemVer, by describing the features, fixes, and breaking changes made in commit messages. You can see examples here. We use commitlint and husky to prevent bad commit message. For example, you want to submit the following commit message git commit -s -am "my bad commit". You will receive the following error :

✖   type must be one of [ci, feat, fix, docs, style, refactor, perf, test, revert, chore] [type-enum]

Here an exemple that will pass the verification: git commit -s -am "chore(opentelemetry-core): update deps"

Fork

In the interest of keeping this repository clean and manageable, you should work from a fork. To create a fork, click the 'Fork' button at the top of the repository, then clone the fork locally using git clone git@github.com:USERNAME/opentelemetry-js.git.

You should also add this repository as an "upstream" repo to your local copy, in order to keep it up to date. You can add this as a remote like so:

git remote add upstream https://github.com/open-telemetry/opentelemetry-js.git

#verify that the upstream exists
git remote -v

To update your fork, fetch the upstream repo's branches and commits, then merge your master with upstream's master:

git fetch upstream
git checkout master
git merge upstream/master

Remember to always work in a branch of your local copy, as you might otherwise have to contend with conflicts in master.

Please also see GitHub workflow section of general project contributing guide.

Running the tests

The opentelemetry-js project is written in TypeScript.

  • yarn install or npm install to install dependencies.
  • yarn compile or npm run compile compiles the code, checking for type errors.
  • yarn bootstrap or npm run bootstrap Bootstrap the packages in the current Lerna repo. Installs all of their dependencies and links any cross-dependencies.
  • yarn test or npm test tests code the same way that our CI will test it.
  • yarn fix or npm run fix lint (and maybe fix) any changes.

Generating API documentation

  • yarn docs or npm run docs to generate API documentation. Generates the documentation in packages/opentelemetry-types/docs/out

Generating CHANGELOG documentation

  • yarn changelog or npm run changelog to generate CHANGELOG documentation in your terminal (see RELEASING.md for more details).

Benchmarks

When two or more approaches must be compared, please write a benchmark in the benchmark/index.js module so that we can keep track of the most efficient algorithm.

  • yarn bench or npm run bench to run your benchmark.