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build: label PRs with GitHub Action instead of nodejs-github-bot
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Main goal of using a GitHub Action for labelling PRs has been to move
the mapping between files changed -> label into a configuration file
local to the nodejs/node repository.

Previously any changes to that mapping meant having to grasp the
nodejs/github-bot project, open a PR with the neccessary changes, get
approval from its maintainers before those changes finally got pushed
to production.

The logic involved in using the file paths / label configuration and
resolving the labels to be applied, has been moved into a custom GitHub
Action project: nodejs/node-pr-labeler.

Aside from removing the external dependency the nodejs-github-bot is in
practise, it also reduces the bar for contributors since the resulting
project is a lot smaller and less complex than nodejs/github-bot.

PR-URL: #38301
Fixes: nodejs/github-bot#294
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
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phillipj authored and targos committed Apr 25, 2021
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195 changes: 195 additions & 0 deletions .github/label-pr-config.yml
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## Order of entries in this map *does* matter for the resolved labels
## earlier entries override later entries
subSystemLabels:
# src subsystems
/^src\/async-wrap/: c++, async_wrap
/^src\/(?:base64|node_buffer|string_)/: c++, buffer
/^src\/cares/: c++, cares
/^src\/(?:process_wrap|spawn_)/: c++, child_process
/^src\/(?:node_)?crypto/: c++, crypto
/^src\/(?:debug-|node_debug)/: c++, debugger
/^src\/udp_/: c++, dgram
/^src\/(?:fs_|node_file|node_stat_watcher)/: c++, fs
/^src\/node_http_parser/: c++, http_parser
/^src\/node_i18n/: c++, intl
/^src\/uv\./: c++, libuv
/^src\/(?:connect(?:ion)?|pipe|tcp)_/: c++, net
/^src\/node_os/: c++, os
/^src\/(?:node_main|signal_)/: c++, process
/^src\/timer_/: c++, timers
/^src\/(?:CNNICHashWhitelist|node_root_certs|tls_)/: c++, tls
/^src\/tty_/: c++, tty
/^src\/node_url/: c++, url-whatwg
/^src\/node_util/: c++, util
/^src\/(?:node_v8|v8abbr)/: c++, V8 Engine
/^src\/node_contextify/: c++, vm
/^src\/.*win32.*/: c++, windows
/^src\/node_zlib/: c++, zlib
/^src\/tracing/: c++, tracing
/^src\/node_api/: c++, n-api
/^src\/node_http2/: c++, http2, dont-land-on-v6.x
/^src\/node_report/: c++, report
/^src\/node_wasi/: c++, wasi
/^src\/node_worker/: c++, worker
/^src\/quic\/*/: c++, quic, dont-land-on-v14.x, dont-land-on-v12.x
/^src\/node_bob*/: c++, quic, dont-land-on-v14.x, dont-land-on-v12.x

# don't label python files as c++
/^src\/.+\.py$/: lib / src, needs-ci

# properly label changes to v8 inspector integration-related files
/^src\/inspector_/: c++, inspector, needs-ci

# don't want to label it a c++ update when we're "only" bumping the Node.js version
/^src\/(?!node_version\.h)/: c++
# BUILDING.md should be marked as 'build' in addition to 'doc'
/^BUILDING\.md$/: build, doc
# meta is a very specific label for things that are policy and or meta-info related
/^([A-Z]+$|CODE_OF_CONDUCT|ROADMAP|WORKING_GROUPS|GOVERNANCE|CHANGELOG|\.mail|\.git.+)/: meta
# things that edit top-level .md files are always a doc change
/^\w+\.md$/: doc
# different variants of *Makefile and build files
/^(tools\/)?(Makefile|BSDmakefile|create_android_makefiles|\.travis\.yml)$/: build, needs-ci
/^tools\/(install\.py|genv8constants\.py|getnodeversion\.py|js2c\.py|utils\.py|configure\.d\/.*)$/: build, needs-ci
/^vcbuild\.bat$/: build, windows, needs-ci
/^(android-)?configure|node\.gyp|common\.gypi$/: build, needs-ci
# more specific tools
/^tools\/gyp/: tools, build, needs-ci
/^tools\/doc\//: tools, doc
/^tools\/icu\//: tools, intl, needs-ci
/^tools\/(?:osx-pkg\.pmdoc|pkgsrc)\//: tools, macos, install
/^tools\/(?:(?:mac)?osx-)/: tools, macos
/^tools\/test-npm/: tools, test, npm
/^tools\/test/: tools, test
/^tools\/(?:certdata|mkssldef|mk-ca-bundle)/: tools, openssl, tls
/^tools\/msvs\//: tools, windows, install, needs-ci
/^tools\/[^/]+\.bat$/: tools, windows, needs-ci
/^tools\/make-v8/: tools, V8 Engine, needs-ci
/^tools\/(code_cache|snapshot|v8_gypfiles)/: needs-ci,
/^tools\/build-addons.js/: needs-ci,
# all other tool changes should be marked as such
/^tools\//: tools
/^\.eslint|\.remark|\.editorconfig/: tools

## Dependencies
# libuv needs an explicit mapping, as the ordinary /deps/ mapping below would
# end up as libuv changes labeled with "uv" (which is a non-existing label)
/^deps\/uv\//: libuv
/^deps\/v8\/tools\/gen-postmortem-metadata\.py/: V8 Engine, post-mortem
/^deps\/v8\//: V8 Engine
/^deps\/uvwasi\//: wasi
/^deps\/nghttp2\/nghttp2\.gyp/: build, http2, dont-land-on-v6.x
/^deps\/nghttp2\//: http2, dont-land-on-v6.x
/^deps\/ngtcp2\//: quic, dont-land-on-v14.x, dont-land-on-v12.x
/^deps\/nghttp3\//: quic, dont-land-on-v14.x, dont-land-on-v12.x
/^deps\/([^/]+)/: $1

## JS subsystems
# Oddities first
/^lib\/(punycode|\w+\/freelist|sys\.js)/: ''
/^lib\/constants\.js$/: lib / src
/^lib\/_(debug_agent|debugger)\.js$/: debugger
/^lib(\/\w+)?\/(_)?link(ed)?list/: timers
/^lib\/\w+\/bootstrap_node/: lib / src
/^lib\/\w+\/v8_prof_/: tools
/^lib\/\w+\/socket_list/: net
/^lib\/\w+\/streams$/: stream
/^lib\/.*http2/: http2, dont-land-on-v6.x
/^lib\/worker_threads.js$/: worker
/^lib\/internal\/url\.js$/: url-whatwg
/^lib\/internal\/modules\/esm/: ES Modules
/^lib\/internal\/quic\/*/: quic, dont-land-on-v14.x, dont-land-on-v12.x

# All other lib/ files map directly
/^lib\/_(\w+)_\w+\.js?$/: $1 # e.g. _(stream)_wrap
/^lib(\/internal)?\/(\w+)\.js?$/: $2 # other .js files
/^lib\/internal\/(\w+)(?:\/|$)/: $1 # internal subfolders

exlusiveLabels:
# more specific tests
/^test\/addons\//: test, addons
/^test\/debugger\//: test, debugger
/^test\/doctool\//: test, doc, tools
/^test\/timers\//: test, timers
/^test\/pseudo-tty\//: test, tty
/^test\/inspector\//: test, inspector
/^test\/cctest\/test_inspector/: test, inspector
/^test\/cctest\/test_url/: test, url-whatwg
/^test\/addons-napi\//: test, n-api
/^test\/async-hooks\//: test, async_hooks
/^test\/report\//: test, report
/^test\/fixtures\/es-module/: test, ES Modules
/^test\/es-module\//: test, ES Modules

/^test\//: test

# specific map for webcrypto.md as it should be labeled 'crypto'
/^doc\/api\/webcrypto.md$/: doc, crypto
# specific map for modules.md as it should be labeled 'module' not 'modules'
/^doc\/api\/modules.md$/: doc, module
# specific map for esm.md as it should be labeled 'ES Modules' not 'esm'
/^doc\/api\/esm.md$/: doc, ES Modules
# n-api is treated separately since it is not a JS core module but is still
# considered a subsystem of sorts
/^doc\/api\/n-api.md$/: doc, n-api
# quic
/^doc\/api\/quic.md$/: doc, quic, dont-land-on-v14.x, dont-land-on-v12.x
# add worker label to PRs that affect doc/api/worker_threads.md
/^doc\/api\/worker_threads.md$/: doc, worker
# automatically tag JS subsystem-specific API doc changes
/^doc\/api\/(\w+)\.md$/: doc, $1
# add deprecations label to PRs that affect doc/api/deprecations.md
/^doc\/api\/deprecations.md$/: doc, deprecations

/^doc\//: doc

# more specific benchmarks
/^benchmark\/buffers\//: benchmark, buffer
/^benchmark\/(?:arrays|es)\//: benchmark, V8 Engine
/^benchmark\/_http/: benchmark, http
/^benchmark\/(?:misc|fixtures)\//: benchmark
/^benchmark\/streams\//: benchmark, stream
/^benchmark\/([^/]+)\//: benchmark, $1

/^benchmark\//: benchmark

allJsSubSystems:
- assert
- async_hooks
- buffer
- child_process
- cluster
- console
- crypto
- debugger
- dgram
- dns
- domain
- events
- esm
- fs
- http
- https
- http2
- module
- net
- os
- path
- process
- querystring
- quic
- readline
- repl
- report
- stream
- string_decoder
- timers
- tls
- tty
- url
- util
- v8
- vm
- wasi
- worker
- zlib
14 changes: 14 additions & 0 deletions .github/workflows/label-pr.yml
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name: Label PRs

on:
pull_request_target:
types: [opened]

jobs:
label:
runs-on: ubuntu-latest

steps:
- uses: node/node-pr-labeler@v1
with:
configuration-path: .github/label-pr-config.yml

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