// Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC") // // Permission to use, copy, modify, and/or distribute this software for any // purpose with or without fee is hereby granted, provided that the above // copyright notice and this permission notice appear in all copies. // // THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH // REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY // AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, // INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM // LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE // OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR // PERFORMANCE OF THIS SOFTWARE. /** @page contributorGuide BIND10 Contributor's Guide So you found a bug in BIND10 or plan to develop an extension and want to send a patch? Great! This page will explain how to contribute your changes smoothly. @section contributorGuideWritePatch Writing a patch Before you start working on a patch or a new feature, it is a good idea to discuss it first with BIND10 developers. You can post your questions to the \c bind10-dev mailing list (https://lists.isc.org/mailman/listinfo/bind10-dev) for general BIND10 stuff, or to the \c bind10-dhcp mailing list (https://lists.isc.org/mailman/listinfo/bind10-dhcp) for DHCP specific topics. If you prefer to get faster feedback, most BIND10 developers hang out in the \c bind10 jabber room (xmpp:bind10@conference.jabber.isc.org). Those involved in DHCP also use the \c dhcp chatroom (xmpp:dhcp@conference.jabber.isc.org). Feel free to join these rooms and talk to us. It is possible that someone else is working on your specific issue or perhaps the solution you plan to implement is not the best one. Often having a 10 minute talk could save many hours of engineering work. First step would be to get the source code from our Git repository. The procedure is very easy and is explained here: http://bind10.isc.org/wiki/GitGuidelines. While it is possible to provide a patch against the latest stable release, it makes the review process much easier if it is for latest code from the Git \c master branch. Ok, so you have written a patch? Great! Before you submit it, make sure that your code compiles. This may seem obvious, but there's more to it. You have surely checked that it compiles on your system, but BIND10 is portable software. Besides Linux, it is compiled and used on relatively uncommon systems like OpenBSD and Solaris 11. Will your code compile and work there? What about endianess? It is likely that you used a regular x86 architecture machine to write your patch, but the software is expected to run on many other architectures. You may take a look at system specific build notes (http://bind10.isc.org/wiki/SystemSpecificNotes). For a complete list of systems we build on, you may take a look at the following build farm report: http://git.bind10.isc.org/~tester/builder/builder-new.html . Does your patch conform to BIND10 coding guidelines (http://bind10.isc.org/wiki/CodingGuidelines)? You still can submit a patch that does not adhere to it, but that will decrease its chances of being accepted. If the deviations are minor, the BIND10 engineer who does the review will likely fix the issues. However, if there are lots of issues, the reviewer may simply reject the patch and ask you to fix it before re-submitting. @section contributorGuideUnittests Running unit-tests One of the ground rules in BIND10 development is that every piece of code has to be tested. We now have an extensive set of unit-tests for almost every line of code. Even if you are fixing something small, like a single line fix, it is encouraged to write unit-tests for that change. That is even more true for new code. If you write a new function, method or a class, you definitely should write unit-tests for it. BIND10 uses the Google C++ Testing Framework (also called googletest or gtest) as a base for our C++ unit-tests. See http://code.google.com/p/googletest/ for details. For Python unit-tests, we use the its \c unittest library which is included in Python. You must have \c gtest installed or at least extracted in a directory before compiling BIND10 unit-tests. To enable unit-tests in BIND10, use: @code ./configure --with-gtest=/path/to/your/gtest/dir @endcode or @code ./configure --with-gtest-source=/path/to/your/gtest/dir @endcode Depending on how you compiled or installed \c gtest (e.g. from sources or using some package management system) one of those two switches will find \c gtest. After that you make run unit-tests: @code make check @endcode If you happen to add new files or have modified any \c Makefile.am files, it is also a good idea to check if you haven't broken the distribution process: @code make distcheck @endcode There are other useful switches which can be passed to configure. It is always a good idea to use \c --enable-logger-checks, which does sanity checks on logger parameters. Use \c --enable-debug to enable various additional consistency checks that reduce performance but help during development. If you happen to modify anything in the documentation, use \c --enable-generate-docs. If you are modifying DHCP code, you are likely to be interested in enabling the MySQL backend for DHCP. Note that if the backend is not enabled, MySQL specific unit-tests are skipped. From that perspective, it is useful to use \c --with-dhcp-mysql. For a complete list of all switches, use: @code ./configure --help @endcode @section contributorGuideReview Going through a review Once all those are checked and working, feel free to create a ticket for your patch at http://bind10.isc.org/ or attach your patch to an existing ticket if you have fixed it. It would be nice if you also join the \c bind10 or \c dhcp chatroom saying that you have submitted a patch. Alternatively, you may send a note to the \c bind10-dev or \c bind10-dhcp mailing lists. Here's the tricky part. One of BIND10 developers will review your patch, but it may not happen immediately. Unfortunately, developers are usually working under a tight schedule, so any extra unplanned review work may take a while sometimes. Having said that, we value external contributions very much and will do whatever we can to review patches in a timely manner. Don't get discouraged if your patch is not accepted after first review. To keep the code quality high, we use the same review processes for internal code and for external patches. It may take some cycles of review/updated patch submissions before the code is finally accepted. Once the process is almost complete, the developer will likely ask you how you would like to be credited. The typical answers are by first and last name, by nickname, by company name or anonymously. Typically we will add a note to the \c ChangeLog and also set you as the author of the commit applying the patch. If the contributted feature is big or critical for whatever reason, it may also be mentioned in release notes. @section contributorGuideExtra Extra steps If you are interested in knowing the results of more in-depth testing, you are welcome to visit the BIND10 build farm: http://git.bind10.isc.org/~tester/builder/builder-new.html. This is a live result page with all tests being run on various systems. Besides basic unit-tests, we also have reports from Valgrind (memory debugger), cppcheck and clang-analyzer (static code analyzers), Lettuce system tests and more. Although it is not possible for non ISC employees to run tests on that farm, it is possible that your contributed patch will end up there sooner or later. */