File: CONTRIBUTING.md

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# Contributing to JmDNS

Want to hack on JmDNS? Awesome! Here are instructions to get you
started. They are probably not perfect, please let us know if anything
feels wrong or incomplete.

## Reporting Issues

Please report JmDNS specific issues to the
[GitHub issues page](https://github.com/openhab/jmdns/issues).

If you have questions about how to use JmDNS, check out the
[JmDNS tag on StackOverflow](http://stackoverflow.com/questions/tagged/jmdns)
and ask a new question if you don't find any answers there.

Do not worry, if you are not clear, which category your issue belongs to - we
will redirect you, if necessary.

## Build Environment

The build is based on Maven, so you will need a JDK >=1.6 and Maven 3 installed.
Then simply execute
```
mvn clean install
```
and find the resulting jar in the `target` folder.

## Contribution guidelines

### Pull requests are always welcome

We are always thrilled to receive pull requests, and do our best to
process them as fast as possible. Not sure if that typo is worth a pull
request? Do it! We will appreciate it.

If your pull request is not accepted on the first try, don't be
discouraged! If there's a problem with the implementation, hopefully you
received feedback on what to improve.

### Create issues...

Any significant improvement should be documented as [a GitHub
issue](https://github.com/openhab/jmdns/issues) before anybody
starts working on it.

### ...but check for existing issues first!

Please take a moment to check that an issue doesn't already exist
documenting your bug report or improvement proposal. If it does, it
never hurts to add a quick "+1" or "I have this problem too". This will
help prioritize the most common problems and requests.

### Conventions

Fork the repo and make changes on your fork in a feature branch:

- If it's a bugfix branch, name it XXX-something where XXX is the number of the
  issue
- If it's a feature branch, create an enhancement issue to announce your
  intentions, and name it XXX-something where XXX is the number of the issue.

Submit unit tests for your changes. JmDNS makes use of the JUnit test framework;
use it! Take a look at existing tests for inspiration. Run the full test suite
on your branch before submitting a pull request.

Update the documentation when creating or modifying features. Test
your documentation changes for clarity, concision, and correctness, as
well as a clean documentation build.

Write clean code. Universally formatted code promotes ease of writing, reading,
and maintenance.

Pull requests descriptions should be as clear as possible and include a
reference to all the issues that they address.

Pull requests must not contain commits from other users or branches.

Commit messages must start with a capitalized and short summary (max. 50
chars) written in the imperative, followed by an optional, more detailed
explanatory text which is separated from the summary by an empty line.

Code review comments may be added to your pull request. Discuss, then make the
suggested modifications and push additional commits to your feature branch. Be
sure to post a comment after pushing. The new commits will show up in the pull
request automatically, but the reviewers will not be notified unless you
comment.

Before the pull request is merged, make sure that you squash your commits into
logical units of work using `git rebase -i` and `git push -f`. After every
commit the test suite should be passing. Include documentation changes in the
same commit so that a revert would remove all traces of the feature or fix.

Commits that fix or close an issue should include a reference like `Closes #XXX`
or `Fixes #XXX`, which will automatically close the issue when merged.

Add your name to the AUTHORS file, but make sure the list is sorted and your
name and email address match your git configuration. The AUTHORS file is
regenerated occasionally from the git commit history, so a mismatch may result
in your changes being overwritten.

### Sign your work

The sign-off is a simple line at the end of the explanation for the
patch, which certifies that you wrote it or otherwise have the right to
pass it on as an open-source patch.  The rules are pretty simple: if you
can certify the below (from
[developercertificate.org](http://developercertificate.org/)):

```
Developer Certificate of Origin
Version 1.1

Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
660 York Street, Suite 102,
San Francisco, CA 94110 USA

Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.


Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
    license and I have the right under that license to submit that
    work with modifications, whether created in whole or in part
    by me, under the same open source license (unless I am
    permitted to submit under a different license), as indicated
    in the file; or

(c) The contribution was provided directly to me by some other
    person who certified (a), (b) or (c) and I have not modified
    it.

(d) I understand and agree that this project and the contribution
    are public and that a record of the contribution (including all
    personal information I submit with it, including my sign-off) is
    maintained indefinitely and may be redistributed consistent with
    this project or the open source license(s) involved.
```

then you just add a line to every git commit message:

    Signed-off-by: Joe Smith <joe.smith@email.com> (github: github_handle)

using your real name (sorry, no pseudonyms or anonymous contributions.)

One way to automate this, is customize your get ``commit.template`` by adding
a ``prepare-commit-msg`` hook to your JmDNS checkout:

```
curl -o .git/hooks/prepare-commit-msg https://raw.github.com/openhab/openhab2/master/contrib/prepare-commit-msg.hook && chmod +x .git/hooks/prepare-commit-msg
```

* Note: the above script expects to find your GitHub user name in ``git config --get github.user``

#### Small patch exception

There are several exceptions to the signing requirement. Currently these are:

* Your patch fixes spelling or grammar errors.
* Your patch is a single line change to documentation.

### How can I become a maintainer?

* Step 1: learn the project inside out
* Step 2: make yourself useful by contributing code, bugfixes, support etc.
* Step 3: try to answer open questions on [StackOverflow](http://stackoverflow.com/questions/tagged/jmdns)

Don't forget: being a maintainer is a time investment. Make sure you will have time to make yourself available.
You don't have to be a maintainer to make a difference on the project!