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CONTRIBUTING.md

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Contributing

Welcome! We're excited that you're interested in contributing. Below are some basic guidelines.

Workflow

Alerting follows a standard GitHub pull request workflow. If you're unfamiliar with this workflow, read the very helpful Understanding the GitHub flow guide from GitHub.

You are welcome to create draft PRs at any stage of readiness - this can be helpful to ask for assistance or to develop an idea. But before a piece of work is finished it should:

  • Be organised into one or more commits, each of which has a commit message that describes all changes made in that commit ('why' more than 'what' - we can read the diffs to see the code that changed).

  • Each commit should build towards the whole - don't leave in back-tracks and mistakes that you later corrected.

  • Have unit tests for new functionality or tests that would have caught the bug being fixed.

  • Include a CHANGELOG message if users of Alerting need to hear about what you did.

To run the unit tests suite:

make test

Dependency management

We use Go modules to manage dependencies on external packages. This requires a working Go environment with version 1.16 or greater and git installed.

To add or update a new dependency, use the go get command:

# Pick the latest tagged release.
go get example.com/some/module/pkg

# Pick a specific version.
go get example.com/some/module/[email protected]

Tidy up the go.mod and go.sum files:

go mod tidy
git add go.mod go.sum
git commit

You have to commit the changes to go.mod and go.sum before submitting the pull request.

alerting uses the goimports tool (go get golang.org/x/tools/cmd/goimports to install) to format the Go files, and sort imports. We use goimports with -local github.com/grafana/alerting parameter, to put Alerting internal imports into a separate group. We try to keep imports sorted into three groups: imports from standard library, imports of 3rd party packages and internal imports. Goimports will fix the order, but will keep existing newlines between imports in the groups. We try to avoid extra newlines like that.