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CONTRIBUTING.md

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Contributing

We would love for you to contribute to eximap and help make it even better than it is today! As a contributor, here are the guidelines we would like you to follow:

Code of Conduct

Help us keep eximap open and inclusive. Please read and follow our [Code of Conduct][coc].

Got a Question or Problem?

Do not open issues for general support questions as we want to keep GitHub issues for bug reports and feature requests. You've got much better chances of getting your question answered on Gitter.

Found a Bug?

If you find a bug in the source code, you can help us by submitting an issue to our GitHub Repository. Even better, you can submit a Pull Request with a fix.

Missing a Feature?

You can request a new feature by submitting an issue to our GitHub Repository. If you would like to implement a new feature, please submit an issue with a proposal for your work first, to be sure that we can use it. Please consider what kind of change it is:

  • For a Major Feature, first open an issue and outline your proposal so that it can be discussed. This will also allow us to better coordinate our efforts, prevent duplication of work, and help you to craft the change so that it is successfully accepted into the project.
  • Small Features can be crafted and directly submitted as a Pull Request.

Submission Guidelines

Submitting an Issue

Before you submit an issue, please search the issue tracker, maybe an issue for your problem already exists and the discussion might inform you of workarounds readily available.

We want to fix all the issues as soon as possible, but before fixing a bug we need to reproduce and confirm it. In order to reproduce bugs we will systematically ask you to provide a minimal reproduction scenario. Having a reproducible scenario gives us wealth of important information without going back and forth to you with additional questions like:

  • version of eximap used
  • and most importantly - a use-case that fails

We will be insisting on a minimal reproduce scenario in order to save maintainers time and ultimately be able to fix more bugs. Interestingly, from our experience users often find coding problems themselves while preparing a reproduceable scenario.

Unfortunately we are not able to investigate / fix bugs without a minimal reproduction, so if we don't hear back from you we are going to close an issue that don't have enough info to be reproduced.

You can file new issues by filling out our new issue form.

Submitting a Pull Request (PR)

Before you submit your Pull Request (PR) consider the following guidelines:

  • Search GitHub for an open or closed PR that relates to your submission. You don't want to duplicate effort.

  • Make your changes in a new git branch:

    git checkout -b my-fix-branch master

  • Create your patch, including appropriate test cases.

  • Follow our Coding Rules.

  • Run the full eximap test suite, as described in the developer documentation, and ensure that all tests pass.

  • Commit your changes using a descriptive commit message that follows our commit message conventions. Adherence to these conventions is necessary because release notes are automatically generated from these messages.

    git commit -a

    Note: the optional commit -a command line option will automatically "add" and "rm" edited files.

  • Push your branch to GitHub:

    git push origin my-fix-branch

  • In GitHub, send a pull request to eximap:develop.

  • If we suggest changes then:

    • Make the required updates.

    • Re-run the eximap test suites to ensure tests are still passing.

    • Rebase your branch and force push to your GitHub repository (this will update your Pull Request):

      git rebase develop -i
git push -f

That's it! Thank you for your contribution!

After your pull request is merged

After your pull request is merged, you can safely delete your branch and pull the changes from the main (upstream) repository:

  • Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:

    git push origin --delete my-fix-branch

  • Check out the develop branch:

    git checkout develop -f

  • Delete the local branch:

    git branch -D my-fix-branch

  • Update your develop with the latest upstream version:

    git pull --ff upstream develop

Coding Rules

To ensure consistency throughout the source code, keep these rules in mind as you are working:

  • All features or bug fixes must be tested by one or more specs (unit-tests).
  • All public API methods must be documented. (Details TBC).

Commit Message Guidelines

We have very precise rules over how our git commit messages can be formatted. This leads to more readable messages that are easy to follow when looking through the project history. But also, we use the git commit messages to generate the eximap change log.

Commit Message Format

Each commit message consists of a header, a body and a footer. The header has a special format that includes a type, a scope and a subject:

<type>(<scope>): <subject>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>

The header is mandatory and the scope of the header is optional.

Any line of the commit message cannot be longer 100 characters! This allows the message to be easier to read on GitHub as well as in various git tools.

Footer should contain a closing reference to an issue if any.

Samples: (even more samples)

docs(changelog): update change log to beta.5

fix(release): need to depend on latest rxjs and zone.js

The version in our package.json gets copied to the one we publish, and users need the latest of these.

Revert

If the commit reverts a previous commit, it should begin with revert: , followed by the header of the reverted commit. In the body it should say: This reverts commit <hash>., where the hash is the SHA of the commit being reverted.

Type

Must be one of the following:

  • build: Changes that affect the build system or external dependencies (example scopes: poison, phoenix)
  • ci: Changes to our CI configuration files and scripts (example scopes: Travis, Coveralls)
  • docs: Documentation only changes
  • feat: A new feature
  • fix: A bug fix
  • perf: A code change that improves performance
  • refactor: A code change that neither fixes a bug nor adds a feature
  • style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
  • test: Adding missing tests or correcting existing tests

Scope

The scope should be the name of the section affected (as perceived by person reading changelog generated from commit messages).

The following is the list of supported scopes:

  • engine
  • plugin
  • scripts
  • api

There are currently a few exceptions to the above rule:

  • packaging: used for changes that change the hex package layout in all of our packages
  • changelog: used for updating the release notes in CHANGELOG.md
  • none/empty string: useful for style, test and refactor changes that are done across all packages (e.g. style: add missing semicolons)

Subject

The subject contains succinct description of the change:

  • use the imperative, present tense: "change" not "changed" nor "changes"
  • don't capitalize first letter
  • no dot (.) at the end

Body

Just as in the subject, use the imperative, present tense: "change" not "changed" nor "changes". The body should include the motivation for the change and contrast this with previous behavior.

Footer

The footer should contain any information about Breaking Changes and is also the place to reference GitHub issues that this commit Closes.

Breaking Changes should start with the word BREAKING CHANGE: with a space or two newlines. The rest of the commit message is then used for this.

A detailed explanation can be found in this [document][commit-message-format].