# Contributing to Node.js ## Code of Conduct The Code of Conduct explains the *bare minimum* behavior expectations the Node Foundation requires of its contributors. [Please read it before participating.](./CODE_OF_CONDUCT.md) ## Issue Contributions When opening new issues or commenting on existing issues on this repository please make sure discussions are related to concrete technical issues with the Node.js software. For general help using Node.js, please file an issue at the [Node.js help repository](https://github.com/nodejs/help/issues). Discussion of non-technical topics including subjects like intellectual property, trademark and high level project questions should move to the [Technical Steering Committee (TSC)](https://github.com/nodejs/TSC/issues) instead. ## Code Contributions The Node.js project has an open governance model and welcomes new contributors. Individuals making significant and valuable contributions are made _Collaborators_ and given commit-access to the project. See the [GOVERNANCE.md](./GOVERNANCE.md) document for more information about how this works. This document will guide you through the contribution process. ### Step 1: Fork Fork the project [on GitHub](https://github.com/nodejs/node) and check out your copy locally. ```text $ git clone git@github.com:username/node.git $ cd node $ git remote add upstream git://github.com/nodejs/node.git ``` #### Which branch? For developing new features and bug fixes, the `master` branch should be pulled and built upon. #### Respect the stability index The rules for the master branch are less strict; consult the [stability index](./doc/api/documentation.md#stability-index) for details. In a nutshell, modules are at varying levels of API stability. Bug fixes are always welcome but API or behavioral changes to modules at stability level 3 (Locked) are off-limits. #### Dependencies Node.js has several bundled dependencies in the *deps/* and the *tools/* directories that are not part of the project proper. Any changes to files in those directories or its subdirectories should be sent to their respective projects. Do not send your patch to us, we cannot accept it. In case of doubt, open an issue in the [issue tracker](https://github.com/nodejs/node/issues/) or contact one of the [project Collaborators](https://github.com/nodejs/node/#current-project-team-members). Especially do so if you plan to work on something big. Nothing is more frustrating than seeing your hard work go to waste because your vision does not align with the project team. Node.js has two IRC channels, [#Node.js](http://webchat.freenode.net/?channels=node.js) for general help and questions, and [#Node-dev](http://webchat.freenode.net/?channels=node-dev) for development of node core specifically. ### Step 2: Branch Create a branch and start hacking: ```text $ git checkout -b my-branch -t origin/master ``` ### Step 3: Commit Make sure git knows your name and email address: ```text $ git config --global user.name "J. Random User" $ git config --global user.email "j.random.user@example.com" ``` Writing good commit logs is important. A commit log should describe what changed and why. Follow these guidelines when writing one: 1. The first line should be 50 characters or less and contain a short description of the change. All words in the description should be in lowercase with the exception of proper nouns, acronyms, and the ones that refer to code, like function/variable names. The description should be prefixed with the name of the changed subsystem and start with an imperative verb, for example, "net: add localAddress and localPort to Socket". 2. Keep the second line blank. 3. Wrap all other lines at 72 columns. A good commit log can look something like this: ```txt subsystem: explain the commit in one line Body of commit message is a few lines of text, explaining things in more detail, possibly giving some background about the issue being fixed, etc. etc. The body of the commit message can be several paragraphs, and please do proper word-wrap and keep columns shorter than about 72 characters or so. That way `git log` will show things nicely even when it is indented. ``` The header line should be meaningful; it is what other people see when they run `git shortlog` or `git log --oneline`. Check the output of `git log --oneline files_that_you_changed` to find out what subsystem (or subsystems) your changes touch. If your patch fixes an open issue, you can add a reference to it at the end of the log. Use the `Fixes:` prefix and the full issue URL. For example: ```txt Fixes: https://github.com/nodejs/node/issues/1337 ``` ### Step 4: Rebase Use `git rebase` (not `git merge`) to sync your work from time to time. ```text $ git fetch upstream $ git rebase upstream/master ``` ### Step 5: Test Bug fixes and features **should come with tests**. Add your tests in the `test/parallel/` directory. For guidance on how to write a test for the Node.js project, see this [guide](./doc/guides/writing_tests.md). Looking at other tests to see how they should be structured can also help. To run the tests on Unix / OS X: ```text $ ./configure && make -j8 test ``` Windows: ```text > vcbuild test ``` (See the [BUILDING.md](./BUILDING.md) for more details.) Make sure the linter is happy and that all tests pass. Please, do not submit patches that fail either check. Running `make test`/`vcbuild test` will run the linter as well unless one or more tests fail. If you want to run the linter without running tests, use `make lint`/`vcbuild jslint`. If you are updating tests and just want to run a single test to check it, you can use this syntax to run it exactly as the test harness would: ```text $ python tools/test.py -v --mode=release parallel/test-stream2-transform ``` You can run tests directly with node: ```text $ ./node ./test/parallel/test-stream2-transform.js ``` Remember to recompile with `make -j8` in between test runs if you change core modules. ### Step 6: Push ```text $ git push origin my-branch ``` Go to https://github.com/yourusername/node and select your branch. Click the 'Pull Request' button and fill out the form. Pull requests are usually reviewed within a few days. If there are comments to address, apply your changes in a separate commit and push that to your branch. Post a comment in the pull request afterwards; GitHub does not send out notifications when you add commits. ## 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.