Checklist (and a short version for the impatient): Commits: * make sure that you have tests for the bug you are fixing * make sure that the test suite passes after your commit. This distribution is built with Dist::Zilla ensure that running `dzil test` passes. You are responsible for ensuring that generated, hand written and author tests pass. * make commits of logical units * check for unnecessary whitespace with "git diff --check" before committing * do not check in commented out code or unneeded files * the first line of the commit message should be a short description and should skip the full stop * the body should provide a meaningful commit message, which: * uses the imperative, present tense: "change", not "changed" or "changes". * includes motivation for the change, and contrasts its implementation with previous behaviour * if you want your work included in the main repository, add a "Signed-off-by: Your Name <email@example.com>" line to the commit message (or just use the option "-s" when committing) to confirm that you agree to the Developer's Certificate of Origin Patch: * if you change, add, or remove any features or make some other user interface change, the associated documentation should be updated as well. * if your name is not writable in ASCII, make sure that you send the patch in the correct encoding. Long version: I started reading over the SubmittingPatches document for git, primarily because I wanted to have a document similar to it for my projects to make sure people understand what they are doing when they write "Signed-off-by" line. But the patch submission requirements are a lot more relaxed here on the technical/contents front, because my projects are thousand times smaller ;-). So here is only the relevant bits. (0) Decide what to base your work on. In general, always base your work on the oldest branch that your change is relevant to. * A bugfix should be based on 'maint' in general. If the bug is not present in 'maint', base it on 'master'. For a bug that's not yet in 'master', find the topic that introduces the regression, and base your work on the tip of the topic. If a 'maint' branch is not present base it on master. * A new feature should be based on 'master' in general. If the new feature depends on a topic that is in 'pu', but not in 'master', base your work on the tip of that topic. * Corrections and enhancements to a topic not yet in 'master' should be based on the tip of that topic. If the topic has not been merged to 'next', it's alright to add a note to squash minor corrections into the series. * In the exceptional case that a new feature depends on several topics not in 'master', start working on 'next' or 'pu' privately and send out patches for discussion. Before the final merge, you may have to wait until some of the dependent topics graduate to 'master', and rebase your work. To find the tip of a topic branch, run "git log --first-parent master..pu" and look for the merge commit. The second parent of this commit is the tip of the topic branch. (1) Make separate commits for logically separate changes. Unless your patch is really trivial, you should not be sending out a patch that was generated between your working tree and your commit head. Instead, always make a commit with complete commit message and generate a series of patches from your repository. It is a good discipline. Describe the technical detail of the change(s). If your description starts to get too long, that's a sign that you probably need to split up your commit to finer grained pieces. That being said, patches which plainly describe the things that help reviewers check the patch, and future maintainers understand the code, are the most beautiful patches. Descriptions that summarise the point in the subject well, and describe the motivation for the change, the approach taken by the change, and if relevant how this differs substantially from the prior version, can be found on Usenet archives back into the late 80's. Consider it like good Netiquette, but for code. Oh, another thing. I am picky about whitespaces. Make sure your changes do not trigger errors with the sample pre-commit hook shipped in templates/hooks--pre-commit. To help ensure this does not happen, run git diff --check on your changes before you commit. (2) Generate your patch using git tools out of your commits. git based diff tools (git, Cogito, and StGIT included) generate unidiff which is the preferred format. You do not have to be afraid to use -M option to "git diff" or "git format-patch", if your patch involves file renames. The receiving end can handle them just fine. Please make sure your patch does not include any extra files which do not belong in a patch submission. Make sure to review your patch after generating it, to ensure accuracy. Before sending out, please make sure it cleanly applies to the "master" branch head. If you are preparing a work based on "next" branch, that is fine, but please mark it as such. (4) Sign your work To improve tracking of who did what, we've borrowed the "sign-off" procedure from the Linux kernel project on patches that are being emailed around. Although this project is a lot smaller it is a good discipline to follow it. 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 a open-source patch. The rules are pretty simple: if you can certify the below: 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 saying Signed-off-by: Random J Developer <firstname.lastname@example.org> This line can be automatically added by git if you run the git-commit command with the -s option. Notice that you can place your own Signed-off-by: line when forwarding somebody else's patch with the above rules for D-C-O. Indeed you are encouraged to do so. Also notice that a real name is used in the Signed-off-by: line. Please don't hide your real name. Some people also put extra tags at the end. "Acked-by:" says that the patch was reviewed by the person who is more familiar with the issues and the area the patch attempts to modify. "Tested-by:" says the patch was tested by the person and found to have the desired effect. An ideal patch flow Here is an ideal patch flow for this project the current maintainer suggests to the contributors: 0. You come up with an itch. You code it up. 1. Send it to the bug tracker and cc people who may need to know about the change. The people who may need to know are the ones whose code you are butchering. These people happen to be the ones who are most likely to be knowledgeable enough to help you, but they have no obligation to help you (i.e. you ask for help, don't demand). "git log -p -- $area_you_are_modifying" would help you find out who they are. 2. You get comments and suggestions for improvements. You may even get them in a "on top of your change" patch form. 3. Polish, refine, and re-send to the the people who spend their time to improve your patch. Go back to step (2). 4. A topic branch is created with the patch and is merged to 'next', and cooked further and eventually graduates to 'master'. In any time between the (2)-(3) cycle, the maintainer may pick it up from the list and queue it to 'pu', in order to make it easier for people play with it without having to pick up and apply the patch to their trees themselves. Know the status of your patch after submission * You can use Git itself to find out when your patch is merged in master. 'git pull --rebase' will automatically skip already-applied patches, and will let you know. This works only if you rebase on top of the branch in which your patch has been merged (i.e. it will not tell you if your patch is merged in pu if you rebase on top of master).