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Additional Onboarding Information

Who to CC in issues

subsystem maintainers
benchmark/* @nodejs/benchmarking, @mscdex
bootstrap_node.js @fishrock123
doc/*, *.md @nodejs/documentation
lib/assert @nodejs/testing
lib/buffer @nodejs/buffer
lib/child_process @bnoordhuis, @cjihrig
lib/cluster @bnoordhuis, @cjihrig, @mcollina
lib/{crypto,tls,https} @nodejs/crypto
lib/dgram @cjihrig, @mcollina
lib/domains @misterdjules
lib/fs, src/{fs,file} @nodejs/fs
lib/{_}http{*} @nodejs/http
lib/inspector.js, src/inspector_* @nodejs/v8-inspector
lib/internal/url, src/node_url @nodejs/url
lib/net @bnoordhuis, @indutny, @nodejs/streams
lib/repl @addaleax, @fishrock123
lib/{_}stream{*} @nodejs/streams
lib/timers @fishrock123, @misterdjules
lib/util @bnoordhuis, @cjihrig, @evanlucas
lib/zlib @addaleax, @bnoordhuis, @indutny
src/async-wrap.* @nodejs/async_hooks
src/node_api.* @nodejs/n-api
src/node_crypto.* @nodejs/crypto
test/* @nodejs/testing
tools/eslint, .eslintrc @not-an-aardvark, @silverwind, @trott
async_hooks @nodejs/async_hooks for bugs/reviews (+ @nodejs/diagnostics for API)
performance @nodejs/performance
platform specific @nodejs/platform-{aix,arm,freebsd,macos,ppc,smartos,s390,windows}
python code @nodejs/python
upgrading c-ares @jbergstroem
upgrading http-parser @jbergstroem, @nodejs/http
upgrading libuv @saghul
upgrading npm @fishrock123, @MylesBorins
upgrading V8 @nodejs/v8, @nodejs/post-mortem

When things need extra attention, are controversial, or semver-major: @nodejs/tsc

If you cannot find who to cc for a file, git shortlog -n -s <file> may help.

Labels

By Subsystem

We generally sort issues by a concept of "subsystem" so that we know what part(s) of the codebase it touches.

Subsystems generally are:

  • lib/*.js
  • doc, build, tools, test, deps, lib / src (special), and there may be others.
  • meta for anything non-code (process) related

There may be more than one subsystem valid for any particular issue / PR.

General

Please use these when possible / appropriate

  • confirmed-bug - Bugs you have verified exist
  • discuss - Things that need larger discussion
  • feature request - Any issue that requests a new feature (usually not PRs)
  • good first contribution - Issues suitable for newcomers to process

--

  • semver-{minor,major}
    • be conservative – that is, if a change has the remote chance of breaking something, go for semver-major
    • when adding a semver label, add a comment explaining why you're adding it
    • minor vs. patch: roughly: "does it add a new method / does it add a new section to the docs"
    • major vs. everything else: run last versions tests against this version, if they pass, probably minor or patch
    • A breaking change helper (full source):
    git checkout $(git show -s --pretty='%T' $(git show-ref -d $(git describe --abbrev=0) | tail -n1 | awk '{print $1}')) -- test; make -j4 test

LTS/Version labels

We use labels to keep track of which branches a commit should land on:

  • dont-land-on-v?.x
    • For changes that do not apply to a certain release line
    • Also used when the work of backporting a change outweighs the benefits
  • land-on-v?.x
    • Used by releasers to mark a PR as scheduled for inclusion in an LTS release
    • Applied to the original PR for clean cherry-picks, to the backport PR otherwise
  • backport-requested-v?.x
    • Used to indicate that a PR needs a manual backport to a branch in order to land the changes on that branch
    • Typically applied by a releaser when the PR does not apply cleanly or it breaks the tests after applying
    • Will be replaced by either dont-land-on-v?.x or backported-to-v?.x
  • backported-to-v?.x
    • Applied to PRs for which a backport PR has been merged
  • lts-watch-v?.x
    • Applied to PRs which the LTS working group should consider including in a LTS release
    • Does not indicate that any specific action will be taken, but can be effective as messaging to non-collaborators
  • lts-agenda
    • For things that need discussion by the LTS working group
    • (for example semver-minor changes that need or should go into an LTS release)
  • v?.x
    • Automatically applied to changes that do not target master but rather the v?.x-staging branch

Once a release line enters maintenance mode, the corresponding labels do not need to be attached anymore, as only important bugfixes will be included.

Other Labels

  • Operating system labels
    • macos, windows, smartos, aix
    • No linux, linux is the implied default
  • Architecture labels
    • arm, mips, s390, ppc
    • No x86{_64}, since that is the implied default

Updating Node.js from Upstream

  • git remote add upstream git://github.com/nodejs/node.git

to update from nodejs/node:

  • git checkout master
  • git remote update -p OR git fetch --all (I prefer the former)
  • git merge --ff-only upstream/master (or REMOTENAME/BRANCH)

best practices

  • commit often, out to your github fork (origin), open a PR
  • when making PRs make sure to spend time on the description:
    • every moment you spend writing a good description quarters the amount of time it takes to understand your code.
  • usually prefer to only squash at the end of your work, depends on the change