# io.js Collaborator Guide **Contents** * Issues and Pull Requests * Accepting Modifications - Involving the TC * Landing Pull Requests - Technical HOWTO This document contains information for Collaborators of the io.js project regarding maintaining the code, documentation and issues. Collaborators should be familiar with the guidelines for new contributors in [CONTRIBUTING.md](./CONTRIBUTING.md) and also understand the project governance model as outlined in [GOVERNANCE.md](./GOVERNANCE.md). ## Issues and Pull Requests Courtesy should always be shown to individuals submitting issues and pull requests to the io.js project. Collaborators should feel free to take full responsibility for managing issues and pull requests they feel qualified to handle, as long as this is done while being mindful of these guidelines, the opinions of other Collaborators and guidance of the TC. Collaborators may **close** any issue or pull request they believe is not relevant for the future of the io.js project. Where this is unclear, the issue should be left open for several days to allow for additional discussion. Where this does not yield input from io.js Collaborators or additional evidence that the issue has relevance, the issue may be closed. Remember that issues can always be re-opened if necessary. ## Accepting Modifications All modifications to the io.js code and documentation should be performed via GitHub pull requests, including modifications by Collaborators and TC members. All pull requests must be reviewed and accepted by a Collaborator with sufficient expertise who is able to take full responsibility for the change. In the case of pull requests proposed by an existing Collaborator, an additional Collaborator is required for sign-off. In some cases, it may be necessary to summon a qualified Collaborator to a pull request for review by @-mention. If you are unsure about the modification and are not prepared to take full responsibility for the change, defer to another Collaborator. Before landing pull requests, sufficient time should be left for input from other Collaborators. Leave at least 48 hours during the week and 72 hours over weekends to account for international time differences and work schedules. Trivial changes (e.g. those which fix minor bugs or improve performance without affecting API or causing other wide-reaching impact) may be landed after a shorter delay. Where there is no disagreement amongst Collaborators, a pull request may be landed given appropriate review. Where there is discussion amongst Collaborators, consensus should be sought if possible. The lack of consensus may indicate the need to elevate discussion to the TC for resolution (see below). All bugfixes require a test case which demonstrates the defect. The test should *fail* before the change, and *pass* after the change. ### Involving the TC Collaborators may opt to elevate pull requests or issues to the TC for discussion by assigning the ***tc-agenda*** tag. This should be done where a pull request: - has a significant impact on the codebase, - is inherently controversial; or - has failed to reach consensus amongst the Collaborators who are actively participating in the discussion. The TC should serve as the final arbiter where required. ## Landing Pull Requests Always modify the original commit message to include additional meta information regarding the change process: - A `Reviewed-By: Name ` line for yourself and any other Collaborators who have reviewed the change. - A `PR-URL:` line that references the full GitHub URL of the original pull request being merged so it's easy to trace a commit back to the conversation that led up to that change. - A `Fixes: X` line, where _X_ is either includes the full GitHub URL for an issue, and/or the hash and commit message if the commit fixes a bug in a previous commit. Multiple `Fixes:` lines may be added if appropriate. See the commit log for examples such as [this one](https://github.com/iojs/io.js/commit/b636ba8186) if unsure exactly how to format your commit messages. Additionally: - Double check PR's to make sure the person's _full name_ and email address are correct before merging. - Except when updating dependencies, all commits should be self contained. Meaning, every commit should pass all tests. This makes it much easier when bisecting to find a breaking change. ### Technical HOWTO _Optional:_ ensure that you are not in a borked `am`/`rebase` state ```text $ git am --abort $ git rebase --abort ``` Checkout proper target branch ```text $ git checkout master ``` Update the tree ```text $ git fetch origin $ git merge --ff-only origin/master ``` Apply external patches ```text $ curl -L https://github.com/iojs/io.js/pull/xxx.patch | git am --whitespace=fix ``` Check and re-review the changes ```text $ git diff origin/master ``` Check number of commits and commit messages ```text $ git log origin/master...master ``` If there are multiple commits that relate to the same feature or one with a feature and separate with a test for that feature - you'll need to squash them (or strictly speaking `fixup`). ```text $ git rebase -i origin/master ``` This will open a screen like this (in the default shell editor): ```text pick 6928fc1 crypto: add feature A pick 8120c4c add test for feature A pick 51759dc feature B pick 7d6f433 test for feature B # Rebase f9456a2..7d6f433 onto f9456a2 # # Commands: # p, pick = use commit # r, reword = use commit, but edit the commit message # e, edit = use commit, but stop for amending # s, squash = use commit, but meld into previous commit # f, fixup = like "squash", but discard this commit's log message # x, exec = run command (the rest of the line) using shell # # These lines can be re-ordered; they are executed from top to bottom. # # If you remove a line here THAT COMMIT WILL BE LOST. # # However, if you remove everything, the rebase will be aborted. # # Note that empty commits are commented out ``` Replace a couple of `pick`s with `fixup` to squash them into a previous commit: ```text pick 6928fc1 crypto: add feature A fixup 8120c4c add test for feature A pick 51759dc feature B fixup 7d6f433 test for feature B ``` Replace `pick` with `reword` to change the commit message: ```text reword 6928fc1 crypto: add feature A fixup 8120c4c add test for feature A reword 51759dc feature B fixup 7d6f433 test for feature B ``` Save the file and close the editor, you'll be asked to enter new commit message for that commit, and everything else should go smoothly. Note that this is a good moment to fix incorrect commit logs, ensure that they are properly formatted, and add `Reviewed-By` line. Time to push it: ```text $ git push origin master ``` ### I just made a mistake With git, there's a way to override remote trees by force pushing (`git push -f`). This should generally be seen as forbidden (since you're rewriting history on a repository other people are working against) but is allowed for simpler slip-ups such as typos in commit messages. However, you are only allowed to force push to any io.js branch within 10 minutes from your original push. If someone else pushes to the branch your commit lives in or the 10 minute period passes, consider the commit final.