thodg/libgit2/CONTRIBUTING.md

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  Date : 2013-11-01T10:51:12
  

  Relicense examples under CC0

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• CONTRIBUTING.md

• # Welcome to libgit2!
  
  We're making it easy to do interesting things with git, and we'd love to have
  your help.
  
  ## Licensing
  
  By contributing to libgit2, you agree to release your contribution under the terms of the license.
  For code under `examples`, this is governed by the [CC0 Public Domain Dedication](examples/COPYING).
  All other code is released under the [GPL v2 with linking exception](COPYING).
  
  ## Discussion & Chat
  
  We hang out in the #libgit2 channel on irc.freenode.net.
  
  Also, feel free to open an
  [Issue](https://github.com/libgit2/libgit2/issues/new) to start a discussion
  about any concerns you have.  We like to use Issues for that so there is an
  easily accessible permanent record of the conversation.
  
  ## Reporting Bugs
  
  First, know which version of libgit2 your problem is in and include it in
  your bug report.  This can either be a tag (e.g.
  [v0.17.0](https://github.com/libgit2/libgit2/tree/v0.17.0) ) or a commit
  SHA (e.g.
  [01be7863](https://github.com/libgit2/libgit2/commit/01be786319238fd6507a08316d1c265c1a89407f)
  ).  Using [`git describe`](http://git-scm.com/docs/git-describe) is a great
  way to tell us what version you're working with.
  
  If you're not running against the latest `development` branch version,
  please compile and test against that to avoid re-reporting an issue that's
  already been fixed.
  
  It's *incredibly* helpful to be able to reproduce the problem.  Please
  include a list of steps, a bit of code, and/or a zipped repository (if
  possible).  Note that some of the libgit2 developers are employees of
  GitHub, so if your repository is private, find us on IRC and we'll figure
  out a way to help you.
  
  ## Pull Requests
  
  Our work flow is a typical GitHub flow, where contributors fork the
  [libgit2 repository](https://github.com/libgit2/libgit2), make their changes
  on branch, and submit a
  [Pull Request](https://help.github.com/articles/using-pull-requests)
  (a.k.a. "PR").
  
  Life will be a lot easier for you (and us) if you follow this pattern
  (i.e. fork, named branch, submit PR).  If you use your fork's `development`
  branch, things can get messy.
  
  Please include a nice description of your changes with your PR; if we have
  to read the whole diff to figure out why you're contributing in the first
  place, you're less likely to get feedback and have your change merged in.
  
  If you are working on a particular area then feel free to submit a PR that
  highlights your work in progress (and flag in the PR title that it's not
  ready to merge). This will help in getting visibility for your fix, allow
  others to comment early on the changes and also let others know that you
  are currently working on something.
  
  ## Porting Code From Other Open-Source Projects
  
  `libgit2` is licensed under the terms of the GPL v2 with a linking
  exception.  Any code brought in must be compatible with those terms.
  
  The most common case is porting code from core Git.  Git is a pure GPL
  project, which means that in order to port code to this project, we need the
  explicit permission of the author.  Check the
  [`git.git-authors`](https://github.com/libgit2/libgit2/blob/development/git.git-authors)
  file for authors who have already consented.
  
  Other licenses have other requirements; check the license of the library
  you're porting code *from* to see what you need to do.  As a general rule,
  MIT and BSD (3-clause) licenses are typically no problem.  Apache 2.0
  license typically doesn't work due to GPL incompatibility.
  
  If you are pulling in code from core Git, another project or code you've pulled from
  a forum / Stack Overflow then please flag this in your PR and also make sure you've
  given proper credit to the original author in the code snippet.
  
  ## Style Guide
  
  `libgit2` is written in [ANSI C](http://en.wikipedia.org/wiki/ANSI_C)
  (a.k.a. C89) with some specific conventions for function and type naming,
  code formatting, and testing.
  
  We like to keep the source code consistent and easy to read.  Maintaining
  this takes some discipline, but it's been more than worth it.  Take a look
  at the
  [conventions file](https://github.com/libgit2/libgit2/blob/development/CONVENTIONS.md).
  
  ## Starter Projects
  
  So, you want to start helping out with `libgit2`? That's fantastic? We
  welcome contributions and we promise we'll try to be nice.
  
  If you want to jump in, you can look at our issues list to see if there
  are any unresolved issues to jump in on.  Also, here is a list of some
  smaller project ideas that could help you become familiar with the code
  base and make a nice first step:
  
  * Convert a `git_*modulename*_foreach()` callback-based iteration API
    into a `git_*modulename*_iterator` object with a create/advance style
    of API.  This helps folks writing language bindings and usually isn't
    too complicated.
  * Write a new `examples/` program that mirrors a particular core git
    command.  (See `examples/diff.c` for example.)  This lets you (and us)
    easily exercise a particular facet of the API and measure compatability
    and feature parity with core git.
  * Submit a PR to clarify documentation! While we do try to document all of
    the APIs, your fresh eyes on the documentation will find areas that are
    confusing much more easily.
  

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