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# Additional Onboarding Information
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## Who to CC in issues
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| subsystem | maintainers |
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| --- | --- |
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| `benchmark/*` | @nodejs/benchmarking, @mscdex |
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| `bootstrap_node.js` | @fishrock123 |
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| `lib/assert` | @nodejs/testing |
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| `lib/buffer` | @nodejs/buffer |
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| `lib/child_process` | @bnoordhuis, @cjihrig |
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| `lib/cluster` | @bnoordhuis, @cjihrig, @mcollina |
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| `lib/{crypto,tls,https}` | @nodejs/crypto |
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| `lib/domains` | @misterdjules |
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| `lib/fs`, `src/{fs|file}` | @nodejs/fs |
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| `lib/{_}http{*}` | @nodejs/http |
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| `lib/net` | @bnoordhuis, @indutny, @nodejs/streams |
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| `lib/{_}stream{s|*}` | @nodejs/streams |
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| `lib/repl` | @addaleax, @fishrock123 |
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| `lib/timers` | @fishrock123, @misterdjules |
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| `lib/util` | @bnoordhuis, @cjihrig, @evanlucas |
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| `lib/zlib` | @addaleax, @bnoordhuis, @indutny |
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| `src/async-wrap.*` | @trevnorris |
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| `src/node_crypto.*` | @nodejs/crypto |
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| `test/*` | @nodejs/testing |
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| `tools/eslint`, `.eslintrc` | @silverwind, @trott |
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| upgrading V8 | @nodejs/v8, @nodejs/post-mortem |
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| upgrading npm | @fishrock123, @thealphanerd |
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| upgrading c-ares | @jbergstroem |
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| upgrading http-parser | @jbergstroem, @nodejs/http |
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| upgrading libuv | @saghul |
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When things need extra attention, are controversial, or `semver-major`: @nodejs/ctc
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If you cannot find who to cc for a file, `git shortlog -n -s <file>` may help.
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## Labels
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### By Subsystem
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We generally sort issues by a concept of "subsystem" so that we know what part(s) of the codebase it touches.
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**Subsystems generally are**:
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* `lib/*.js`
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* `doc`, `build`, `tools`, `test`, `deps`, `lib / src` (special), and there may be others.
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* `meta` for anything non-code (process) related
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There may be more than one subsystem valid for any particular issue / PR.
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### General
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Please use these when possible / appropriate
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* `confirmed-bug` - Bugs you have verified exist
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* `discuss` - Things that need larger discussion
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* `feature request` - Any issue that requests a new feature (usually not PRs)
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* `good first contribution` - Issues suitable for newcomers to process
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--
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* `semver-{minor,major}`
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* be conservative – that is, if a change has the remote *chance* of breaking something, go for semver-major
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* when adding a semver label, add a comment explaining why you're adding it
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* minor vs. patch: roughly: "does it add a new method / does it add a new section to the docs"
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* major vs. everything else: run last versions tests against this version, if they pass, **probably** minor or patch
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* A breaking change helper ([full source](https://gist.github.com/chrisdickinson/ba532fa0e4e243fb7b44)):
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```sh
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git checkout $(git show -s --pretty='%T' $(git show-ref -d $(git describe --abbrev=0) | tail -n1 | awk '{print $1}')) -- test; make -j8 test
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```
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### Other Labels
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* Operating system labels
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* `os x`, `windows`, `solaris`
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* No linux, linux is the implied default
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* Architecture labels
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* `arm`, `mips`
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* No x86{_64}, since that is the implied default
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* `lts-agenda`, `lts-watch-v*`
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* tag things that should be discussed to go into LTS or should go into a specific LTS branch
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* (usually only semver-patch things)
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* will come more naturally over time
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## Updating Node.js from Upstream
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* `git remote add upstream git://github.com/nodejs/node.git`
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to update from nodejs/node:
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* `git checkout master`
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* `git remote update -p` OR `git fetch --all` (I prefer the former)
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* `git merge --ff-only upstream/master` (or `REMOTENAME/BRANCH`)
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## If `git am` fails
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* if `git am` fails – use `git am --abort`
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* this usually means the PR needs updated
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* prefer to make the originating user update the code, since they have it fresh in mind
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* first, reattempt with `git am -3` (3-way merge)`
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* if `-3` still fails, and you need to get it merged:
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* `git fetch upstream pull/N/head:pr-N && git checkout pr-N && git rebase master`
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## best practices
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* commit often, out to your github fork (origin), open a PR
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* when making PRs make sure to spend time on the description:
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* every moment you spend writing a good description quarters the amount of time it takes to understand your code.
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* usually prefer to only squash at the *end* of your work, depends on the change
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