# Contributing to Nest CLI
We would love for you to contribute to Nest and help make it even better than it is today! As a contributor, here are the guidelines we would like you to follow :
- [Question or Problem?](#question)
- [Issues and Bugs](#issue)
- [Feature Requests](#feature)
- [Submission Guidelines](#submit)
## <a name="question"></a> 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 Stack Overflow where the questions should be tagged with tag nestjs.
[Stack Overflow](https://stackoverflow.com/questions/tagged/nestjs) is a much better place to ask questions since:
- questions and answers stay available for public viewing so your question / answer might help someone else
- Stack Overflow's voting system assures that the best answers are prominently visible.
To save your and our time, we will systematically close all issues that are requests for general support and redirect people to Stack Overflow.
If you would like to chat about the question in real-time, you can reach out via our [gitter](https://gitter.im/nestjs/nest-cli) channel.
## <a name="issue"></a> Found a Bug?
If you find a bug in the source code, you can help us by
[submitting an issue](#submit-issue). Even better, you can [submit a Pull Request](#submit-pr) with a fix.
## <a name="feature"></a> Missing a Feature?
You can _request_ a new feature by [submitting an issue](#submit-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. For your issue name, please prefix your proposal with `[discussion]`, for example "[discussion]: your feature idea".
- **Small Features** can be crafted and directly [submitted as a Pull Request](#submit-pr).
## <a name="submit"></a> Submission Guidelines
### <a name="submit-issue"></a> 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 using a repository or [Gist](https://gist.github.com/). Having a live, reproducible scenario gives us wealth of important information without going back & forth to you with additional questions like:
- version of NestJS-CLI used (`nest info`)
- and most importantly - a use-case that fails
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 doesn't have enough info to be reproduced.
You can file new issues by filling out our [new issue form](https://github.com/nestjs/nest/issues/new).
### <a name="submit-pr"></a> Submitting a Pull Request (PR)
Before you submit your Pull Request (PR) consider the following guidelines:
1. Search [GitHub](https://github.com/nestjs/nest/pulls) for an open or closed PR that relates to your submission. You don't want to duplicate effort.
1. Fork the nestjs/nest-cli repo.
1. Get a gpg key to sign your commits, see [help](https://help.github.com/articles/about-gpg/).
1. Create your patch, **including appropriate test cases**.
1. Commit your changes using a descriptive commit message
git commit -am "<message>"
Note: the optional commit `-a` command line option will automatically "add" and "rm" edited files.
1. Push your branch to GitHub:
git push origin my-fix-branch
Note: you can use -u to set your branch in upstream and just push for the next times.
1. In GitHub, send a pull request to `nestjs/nest-cli:master`.
- If we suggest changes then:
- Make the required updates.
- Rebase your branch and force push to your GitHub repository (this will update your Pull Request):
git rebase master -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 master branch:
git checkout master -f
- Delete the local branch:
git branch -D my-fix-branch
- Update your master with the latest upstream version:
git pull --ff upstream master
## <a name="rules"></a> 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).
// We're working on auto-documentation.
* All public API methods **must be documented**. (Details TBC). -->
**100 characters**. An automated formatter is available ( `npm run format` ).
## <a name="commit"></a> 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 Nest 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**:
The **header** is mandatory and the **scope** of the header is optional.
Any line of the commit message cannot be longer than 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](https://help.github.com/articles/closing-issues-via-commit-messages/) if any.
Samples: (even more [samples](https://github.com/nestjs/nest/commits/master))
docs(changelog) update change log to beta.5
fix(@nestjs/core) 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.
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.
Must be one of the following:
* **build**: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
* **chore**: Updating tasks etc; no production code change
* **ci**: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
* **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
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
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.
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].
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