Make RuboCop Super Fast

.BLF3VCP$PQ 4VQFS'BTU ,PJDIJ*50&4. *OD 3VCZ,BJHJ RuboCop server mode 5IV

!LPJD w 044QSPHSBNNFS w 3VCP$PQDPSFUFBN TJODF w )FBENBJOUBJOFSPG3VCP$PQ3BJMT
3VCP$PQ1FSGPSNBODF BOE 3VCP$PQ.JOJUFTU w &OHJOFFSJOH.BOBHFSBOE %JTUJOHVJTIFE&OHJOFFSPG&4. *OD

&4. *OD

🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊🌊 *TFFCJ4QPOTPS #esm_ise_ebi #rubykaigi

Support OSS community

4QFBLFSTGSPN&4. *OD 👈%BZ SVCZLBJHJ# %BZ👉 SVCZLBJHJ# 👈%BZ SVCZLBJHJ#

+PJOVT 🗾w-FUTHSPXUPHFUIFS w:PVDBOXPSL SFNPUFMZGSPNBMM PWFS+BQBO w4FFBHJMFFTNDPKQ

w +BWB4DSJQU1SFUUJFS &4-JOU w (P(PGNU w 3VTU3VTUGNU $MJQQZ w 3VCZ3VCP$PQ
4UBOEBSE BOE PUIFST -JOUFS'PSNBUUFS

IUUQTSBJMTIPTUJOHDPNXIJDISVCZHFNTEPZPVMPWF

IUUQTSBJMTIPTUJOHDPNXIJDISVCZHFNTGSVTUSBUFZPVUIFNPTU

3VCP$PQDPSFEFWFMPQFST +0900 UTC+0200 +0300 +0800 -0400 .PSFUIBODPOUSJCVUPST

3VCP$PQDPSFEFWFMPQFST +0900 UTC+0200 +0300 +0800 -0400 .PSFUIBODPOUSJCVUPST "VUIPS

5IFpSTUDPNNJU % git log -p --reverse commit afbead34db54506c12a21dbd4ce04fada0f8b9a4 Author: Bozhidar
Batsov <[email protected]> Date: Sat Apr 21 13:06:42 2012 +0300 Initial commit to rubocop. --- .document | 5 +++++ .gitignore | 49 +++++++++++++++++++++++++++++++++++++++ ++++++++++ .rspec | 1 + Gemfile | 16 ++++++++++++++++ LICENSE.txt | 20 ++++++++++++++++++++ README.rdoc | 19 +++++++++++++++++++ Rakefile | 45 +++++++++++++++++++++++++++++++++++++++ ++++++ features/rubocop.feature | 9 +++++++++ features/step_definitions/rubocop_steps.rb | 0 features/support/env.rb | 13 +++++++++++++

5IFpSTUDPNNJU % git log -p --reverse commit afbead34db54506c12a21dbd4ce04fada0f8b9a4 Author: Bozhidar
Batsov <[email protected]> Date: Sat Apr 21 13:06:42 2012 +0300 Initial commit to rubocop. --- .document | 5 +++++ .gitignore | 49 +++++++++++++++++++++++++++++++++++++++ ++++++++++ .rspec | 1 + Gemfile | 16 ++++++++++++++++ LICENSE.txt | 20 ++++++++++++++++++++ README.rdoc | 19 +++++++++++++++++++ Rakefile | 45 +++++++++++++++++++++++++++++++++++++++ ++++++ features/rubocop.feature | 9 +++++++++ features/step_definitions/rubocop_steps.rb | 0 features/support/env.rb | 13 +++++++++++++ 👈

UI"OOJWFSTBSZZFBS🎉

3VCP$PQDPSFEFWFMPQFST +0900 UTC+0200 +0300 +0800 -0400 .PSFUIBODPOUSJCVUPSTJOZFBST .F

.BJOUBJO3VCP$PQ)2&WFSZ%BZ IUUQTHJUIVCDPNLPJD PSHSVCPDPQ

5IJTUBMLFYQMBJOT POFPGUIFNJMFTUPOFTPG3VCP$PQ

w5BHMJOFPG3VCP$PQMJLF 3VCZY w*OPUIFSXPSET 3VCP$PQ BJNTUPCFUXJDFBTGBTUBT 3VCP$PQ 3VCP$PQY

(SPXJOHOFFEGPS EFWFMPQFSFYQFSJFODF

w"QBSUPGMPDBMCVJMEQSPDFTT w$POUJOVPVT*OUFHSBUJPO w*OUFHSBUJPOBOEJOUFSBDUJPO XJUIFEJUPST*%&T QSPNJOFOUSFDFOUMZ 6TFDBTFTPG3VCP$PQ

/PPOFDPNQMBJOTBCPVU CFUUFSQFSGPSNBODF💨

$BDIJOH .VMUJDPSFT 3FEVDFVOVTFESFRVJSFT %BFNPOJ[F )PXUPNBLFJUGBTUFS

w*UIBWFCFFOQSPWJEFEGPSBMPOHUJNF w4UPSFEJOUP~/.cache/rubocop_cache CZEFGBVMU w4QFDJGZcache=falseJGZPVXBOUUP EJTBCMFUIFDBDIF $BDIJOH

w3VCP$PQ SVOTQBSBMMFM JOTQFDUJPOCZEFGBVMU w3VCP$PQ DBOSVO QBSBMMFMBVUPDPSSFDUJPO .VMUJDPSFT
/&8

DPSF$16T )ZQFS5ISFBEJOH TFD OPQBSBMMFM QBSBMMFM
w8IFO3VCP$PQ JOTQFDUTBMPUPG pMFT JUXJMMCF FGGFDUJWF wFHTFDTFD BCPVUpMFT

w"MMDPQTBSFMPBEFEFWFOXJUI UIF--onlyPQUJPO w/PUJNQMFNFOUFEZFUEVFUP MBSHFJOUFSOBMDIBOHFT 5#% w1BSUJBMMZSFMBUFEUPTFSWFSNPEF 3FEVDFVOVTFESFRVJSFT

w8F3VCP$PQEFWFMPQFSTXFSF BXBSFPGUIFDPTUPGJOJUJBM NPEVMFMPBEJOH w*JOUFHSBUFESVCPDPQEBFNPO JOUP3VCP$PQDPSF %BFNPOJ[F TFSWFSNPEF

YGBTUFSNPEVMFMPBEJOH TFD SFRVJSFSVCPDPQ SFRVJSFSVCPDPQTFSWFS wrequire
'rubocop' SFRVJSFTNPTUPGpMFT wrequire 'rubocop/ server'POMZSFRVJSFT pMFTOFFEFEGPS TFSWFSNPEF

%JWFJOUPUIFTFSWFSNPEF UPEBZ

1BTUBOEDVSSFOU 8IBUTSVCPDPQEBFNPO *OUFHSBUFXJUISVCPDPQEBFNPO 5IFTFSWFSNPEF"1*EFTJHO 4FSWFSQSPDFTTBOEDBDIJOHpMFT
"HFOEB

#FGPSFSVCPDPQEBFNPO JOUFHSBUJPO 1BTUBOEDVSSFOU

*OTJEFUSBEJUJPOBMrubocopDPNNBOE 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run •RuboCop::CLI.new.runJTBOFOEQPJOU"1*
w&BDICPPUrubocopQSPDFTTSVOTSVCPDPQDPNNBOE # Term #1 % rubocop 4UBSUBOESVO

3VCP$PQQSPDFTT 1*% *OTJEFUSBEJUJPOBMrubocopDPNNBOE # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run •RuboCop::CLI.new.runJTBOFOEQPJOU"1*
w&BDICPPUrubocopQSPDFTTSVOTSVCPDPQDPNNBOE # Term #1 % rubocop # Term #2 % rubocop 4UBSUBOESVO 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run 4UBSUBOESVO

w&BDICPPUrubocopQSPDFTTSVOTSVCPDPQDPNNBOE # Term #1 % rubocop # Term #2 % rubocop # Term #3 % rubocop 4UBSUBOESVO 4UBSUBOESVO 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run 4UBSUBOESVO

w&BDICPPUrubocopQSPDFTTSVOTSVCPDPQDPNNBOE # Term #1 % rubocop # Term #2 % rubocop # Term #3 % rubocop 4UBSUBOESVO 4UBSUBOESVO 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run 3VCP$PQQSPDFTT 1*% # exe/rubocop (snip) require 'rubocop' RuboCop::CLI.new.run 1*%TBSFBMXBZTEJ⒎FSFOU 4UBSUBOESVO

w/FFETrequire 'rubocop'UPVTFUIF"1* w*ODMVEFTFWFSZUIJOHZPVOFFEGPS 3VCP$PQ w.PTUPGpMFTJTSFRVJSFEBOE JUJTTMPX RuboCop::CLI.new.run"1*

SVCPDPQEBFNPOHFN "SFTPMVUJPOCZUIJSEQBSUZ

"HFOEB

w"!GPIUFQSPEVDU w&OEPSTFECZTPNFPG*%& JOUFHSBUJPOVTFST w5IBUTXIBUVTFSTSFBMMZXBOU "VTFDBTFESJWFO 8IBUTSVCPDPQEBFNPO

)PXEJESVCPDPQEBFNPO NBLF3VCP$PQGBTU

w$MJFOU4FSWFSNPEFM w4FSWFS.PEVMFTBSFMPBEFE POMZPODFEVSJOHCPPUQSPDFTT w$MJFOU$POOFDUTUPUIFTFSWFS UIBUBMSFBEZMPBEFENPEVMFT 4FQBSBUFNPEVMFMPBEJOHGSPNCPPUTUSBQ

$MJFOU1SPDFTT 1*% 4UBSU%BFNPO 4FSWFS 4FSWFS1SPDFTT 1*% # Loading dependencies. require
'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true) rubocop-daemon % rubocop-daemon start rubocop rubocop-daemon startTUBSUTTFSWFSQSPDFTT

$MJFOU1SPDFTT 1*% 4UBSU%BFNPO 4FSWFS 4FSWFS1SPDFTT 1*% # Loading dependencies. require
'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true) rubocop-daemon % rubocop-daemon start rubocop rubocop-daemon startTUBSUTUIFQSPDFTTBTEBFNPO Process.daemon(true)

6QBOESVOOJOH $MJFOU1SPDFTT 1*% 4UBSU%BFNPO 4FSWFS 4FSWFS1SPDFTT 1*% # Loading dependencies.
require 'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true) rubocop-daemon % rubocop-daemon start rubocop rubocop-daemon startTUBSUTUIFQSPDFTTBTEBFNPO Process.daemon(true)

6QBOESVOOJOH $MJFOU1SPDFTT 1*% &YFD3VCP$PQ 7JBDMJFOU 4FSWFS1SPDFTT 1*% # Loaded API
RuboCop::CLI.new.run rubocop-daemon % rubocop-daemon exec rubocop rubocop-daemon execSVOTCLI.new.run PGEBFNPO TCP/IP TCPSocket.open('127.0.0.1', port)

RuboCop::CLI.new.run rubocop-daemon % rubocop-daemon exec $MJFOU1SPDFTT 1*% % rubocop-daemon exec rubocop $POUJOVFUPDPOOFDUUPUIFBMSFBEZSVOOJOHEBFNPO TCP/IP TCP/IP

RuboCop::CLI.new.run rubocop-daemon % rubocop-daemon exec $MJFOU1SPDFTT 1*% % rubocop-daemon exec rubocop $POUJOVFUPDPOOFDUUPUIFBMSFBEZSVOOJOHEBFNPO "MXBZTUIFTBNF1*% TCP/IP TCP/IP

*ODPOWFOJFOUUXPQIBTF

SVCPDPQEBFNPOXSBQQFS 4FSWFS1SPDFTT QJE require 'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true) rubocop-daemon-wrapper rubocop
5IFTIFMMTDSJQUTUBSUTUIFEBFNPOJGJUJTOPUSVOOJOH $MJFOU1SPDFTT QJE if [ ! -f "$TOKEN_PATH" ]; then $RUBOCOP_DAEMON start fi # snip if ! run_rubocop_command $@; then RuboCop::CLI.new.run # ~/.bashrc export PATH="/usr/local/bin/rubocop-daemon-wrapper:$PATH" ncDNE

4FSWFS1SPDFTT QJE require 'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true) SVCPDPQEBFNPOXSBQQFS rubocop-daemon-wrapper rubocop
5IFTIFMMTDSJQUTUBSUTUIFEBFNPOJGJUJTOPUSVOOJOH $MJFOU1SPDFTT QJE if [ ! -f "$TOKEN_PATH" ]; then $RUBOCOP_DAEMON start fi # snip if ! run_rubocop_command $@; then RuboCop::CLI.new.run # ~/.bashrc export PATH="/usr/local/bin/rubocop-daemon-wrapper:$PATH" ncDNE $RUBOCOP_DAEMON start require 'rubocop' TCPServer.open('127.0.0.1', port) Process.daemon(true)

5IFTIFMMTDSJQUTUBSUTUIFEBFNPOJGJUJTOPUSVOOJOH $MJFOU1SPDFTT QJE if [ ! -f "$TOKEN_PATH" ]; then $RUBOCOP_DAEMON start fi # snip if ! run_rubocop_command $@; then RuboCop::CLI.new.run # ~/.bashrc export PATH="/usr/local/bin/rubocop-daemon-wrapper:$PATH" ncDNE run_rubocop_command RuboCop::CLI.new.run

5IFTIFMMTDSJQUTUBSUTUIFEBFNPOJGJUJTOPUSVOOJOH $MJFOU1SPDFTT QJE if [ ! -f "$TOKEN_PATH" ]; then $RUBOCOP_DAEMON start fi # snip if ! run_rubocop_command $@; then RuboCop::CLI.new.run # ~/.bashrc export PATH="/usr/local/bin/rubocop-daemon-wrapper:$PATH" ncDNE # ~/.bashrc export PATH="/usr/local/bin/rubocop-daemon-wrapper:$PATH"

*OUFHSBUJPOSVCPDPQEBFNPOJOUP 3VCP$PQJTBVTFGVMBQQSPBDI

"HFOEB

SVCPDPQSVCPDPQ 1FSGPSNBODFJNQSPWFNFOUTGPSCFUUFSFEJUPSJOUFHSBUJPO

5IJTJTBTUPSZPGIPX* EJE3VCZ,BJHJESJWFO EFWFMPQNFOU "OE*SFHSFUUIBU*EJEOPU SFBDIUIFNJMFTUPOFQVMM SFRVFTUOVNCFS ΩϦ൪ 😅 3*4&61

SVCPDPQSVCPDPQ *OUFHSBUFSVCPDPQEBFNPO

)PXUPJOUFHSBUFXJUI SVCPDPQEBFNPO

$MJFOU1SPDFTT 1*% "CPVUUIFTFSWFSNPEF client process % rubocop --server server process
4QFDJGZ--serverPQUJPOUPCPPUJOTFSWFSNPEF

$MJFOU1SPDFTT 1*% "CPVUUIFTFSWFSNPEF 4FSWFS1SPDFTT 1*% require 'rubocop/server' server_cli = RuboCop::Server::CLI.new
exit_status = server_cli.run exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end client process % rubocop --server server process 4UBSUTFSWFSQSPDFTTFTBOEJOTQFDUTPVSDFDPEF

$MJFOU1SPDFTT 1*% "CPVUUIFTFSWFSNPEF 4FSWFS1SPDFTT 1*% require 'rubocop/server' server_cli = RuboCop::Server::CLI.new
exit_status = server_cli.run exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end client process % rubocop --server $MJFOU1SPDFTT 1*% % rubocop --server server process $POUJOVFUPDPOOFDUUPBOBMSFBEZSVOOJOHTFSWFS "MXBZTUIFTBNFQSPDFTT

0VUMJOFPGTFSWFSNPEF

wRuboCop::CLI.new.runJTGPS OPTFSWFSNPEF EFGBVMU wRuboCop::Server::CLI.new. runJTGPSTFSWFSNPEF 5XPFOEQPJOU"1*T

wrequire 'rubocop'SFRVJSFT NPTUPGpMFT IFBWZXFJHIU wrequire 'rubocop/server'POMZ SFRVJSFTpMFTOFFEFEGPS TFSWFSNPEF MJHIUXFJHIU
3FEVDFSFRVJSFENPEVMFT

YGBTUFSNPEVMFMPBEJOH TFD SFRVJSFSVCPDPQ SFRVJSFSVCPDPQTFSWFS wrequire
'rubocop' SFRVJSFTNPTUPGpMFT wrequire 'rubocop/ server'POMZSFRVJSFT pMFTOFFEFEGPS TFSWFSNPEF

YGBTUFS % ruby -rbenchmark -e '$LOAD_PATH.unshift("/path/to/rubocop/lib"); Benchmark.bm { |x| x.report
{ require "rubocop" }}' user system total real 0.573636 0.217166 0.790802 ( 0.815585) % ruby -rbenchmark -e '$LOAD_PATH.unshift("/path/to/rubocop/lib"); Benchmark.bm { |x| x.report { require "rubocop/server" }}' user system total real 0.000386 0.000587 0.000973 ( 0.000969) SFRVJSFSVCPDPQ SFRVJSFSVCPDPQTFSWFS

1BTUexe/rubocop $LOAD_PATH.unshift("#{__dir__}/../lib") require 'rubocop' RuboCop::CLI.new.run $PEFTOJQQFU &YFDVUFEFBDIUJNFXJUIUIFASVCPDPQADPNNBOE 3FRVJSFEFBDIUJNFXJUIUIFASVCPDPQADPNNBOE

$VSSFOUexe/rubocop "GUFS require 'rubocop/server' server_cli = RuboCop::Server::CLI.new exit_status = server_cli.run
exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF require 'rubocop/server'

exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH server_cli = RuboCop::Server::CLI.new exit_status = server_cli.run exit exit_status if server_cli.exit?

exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH $IFDLTFSWFSTUBUVT if RuboCop::Server.running?

exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH $IFDLTFSWFSTUBUVT 3VOOJOHXJUITFSWFSNPEF exit_status = RuboCop::Server::ClientCommand::Exec.new.run

exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH $IFDLTFSWFSTUBUVT 3VOOJOHXJUIOPTFSWFSNPEF 3VOOJOHXJUITFSWFSNPEF require 'rubocop' cli = RuboCop::CLI.new.run

exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH $IFDLTFSWFSTUBUVT 3VOOJOHXJUIOPTFSWFSNPEF 3VOOJOHXJUITFSWFSNPEF require 'rubocop' cli = RuboCop::CLI.new.run 4MPX

.VDIMJHIUFSUIBOrequire 'rubocop' require 'rubocop/server' server_cli = RuboCop::Server::CLI.new exit_status = server_cli.run
exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end $PEFTOJQQFU .BLFBMJHIUXFJHIUEFQFOEFODZSFRVJSF 4FSWFSNPEFTFUVQ FHTUBSUJOHBOETUPQQJOH $IFDLTFSWFSTUBUVT 3VOOJOHXJUITFSWFSNPEF server_cli = RuboCop::Server::CLI.new exit_status = server_cli.run exit exit_status if server_cli.exit? exit_status = RuboCop::Server::ClientCommand::Exec.new.run require 'rubocop/server' if RuboCop::Server.running?

$MJFOU1SPDFTT 1*% &YFD3VCP$PQXJUITFSWFS 4FSWFS1SPDFTT 1*% require 'rubocop/server' server_cli = RuboCop::Server::CLI.new
exit_status = server_cli.run exit exit_status if server_cli.exit? if RuboCop::Server.running? exit_status = RuboCop::Server::ClientCommand::Exec.new.run else require 'rubocop' cli = RuboCop::CLI.new.run end rubocop client % rubocop --server $MJFOU1SPDFTT 1*% % rubocop --server rubocop server $POUJOVFUPDPOOFDUUPBOBMSFBEZSVOOJOHTFSWFS "MXBZTUIFTBNFQSPDFTT

w0CKFDUTMPBEFEXJUIrequire require_relativeFUD JUJTJO NFNPSZ w5IFTFSWFSQSPDFTTJTGBTUFSXIFO SFRVJSFENPEVMFTBSFMPBEFE 4QFFEVQXJUITFSWFS

1SPHSBNNJOHXIBUJTDPEFEBOE XIBUJTOPUDPEFE !LBLVUBOJTBZT IUUQTTQFBLFSEFDLDPNLBLVUBOJBHJMFNBOJGFTUPEFDBEF TMJEF

"HFOEB

$PNNBOEMJOF"1*EFTJHO

$PNNBOEMJOF"1*EFTJHO IUUQTHJUIVCDPNSVCPDPQSVCPDPQQVMMJTTVFDPNNFOU rubocop --serverWTrubocop-server

w"OPUIFSPQUJPOJTrubocop-server DPNNBOEGPSTFSWFSNPEF w*UJTFBTZUPEFTJHOUIFTFSWFSQPSU OVNCFSBTBDPNNBOEMJOFBSHVNFOU w-JLFemacsclientDPNNBOE 8IZOPUrubocop-server

wSVCPDPQEBFNPOVTFSTTFFNUPXBOUUPTUBSUUIF TFSWFSXJUIrubocopDPNNBOE JGUIFTFSWFSJTOPU TUBSUFE w5IBUTXIZrubocop-daemon-wrapperJTQSPWJEFE w"GUFSBMM*BMJBTUPFNBDT •alias emacs='emacsclient -nw
-a ""' w*DIPTFUPBEE--serverPQUJPOUPUIFrubocopDPNNBOE 8IZOPUrubocop-server

*NQPSUFESVCPDPQEBFNPOPQUJPOT SVCPDPQEBFNPO SVCPDPQ OPUF FYFD rubocop-daemon exec rubocop --server rubocopJTBMTP0,BGUFS
TUBSUJOHUIFTFSWFS FYFDXP TFSWFS N/A rubocop --no-server %FGBVMUXJUIPVUTFSWFS PQUJPOT TUBSUTFSWFS rubocop-daemon start rubocop --start-server )PTUBOEQPSUDBOCF TQFDJpFEXJUIFOWWBST TUPQTFSWFS rubocop-daemon stop rubocop --stop-server SFTUBSU rubocop-daemon restart rubocop --restart-server TUBUVT rubocop-daemon status rubocop --server-status TUBSUFYFD rubocop-daemon-wrapper rubocop --server

4FSWFSNPEFPQUJPOT

w5IFEFGBVMUCFIBWJPS w3VOXJUIPVUTFSWFS w*UTDPNQBUJCMFXJUIPME3VCP$PQ WFSTJPOT w*UTTUBCMFCVUTMPX --no-server EFGBVMU

w3VOJOTQFDUJPOBGUFSTUBSUJOHSVCPDPQ TFSWFSQSPDFTTJGOPUTUBSUFE w"GUFSFYFDVUJOH--serverPQUJPO rubocopDPNNBOESVOTBTDMJFOU w*EMJLFUPDSFBUFBTIPSUOBNFCVU-sJT BMSFBEZVTFE --server

w4FSWFSQSPDFTTOBNFJT rubocop --server #{dirname} w3VCP$PQTFSWFSTBSFBTTPDJBUFEXJUI UIFEJSFDUPSZJOXIJDIUIFZXFSFTUBSUFE 4FSWFSQSPDFTTOBNF % ps aux
| grep 'rubocop --server' user 16060 0.0 0.0 5078568 2264 ?? S 7:54AM 0:00.00 rubocop --server /Users/koic/src/github.com/esminc/foo user 16337 0.0 0.0 5331560 2396 ?? S 23:51PM 0:00.00 rubocop --server /Users/koic/src/github.com/esminc/bar

w4UZMFTXJMMWBSZGSPNQSPKFDUUPQSPKFDU w$POpHVSFTSVMFTCZSVCPDPQZNM w&BDITFSWFSIBTJUTPXOQSPKFDU TFUUJOHT w4FSWFSTUBSUTGPSFBDIQSPKFDU TP JOEFQFOEFOUQSPKFDUQSFGFSFODFTBQQMZ $POpHVSBUJPOTBSFOFWFSNJYFE

w4UBSU3VCP$PQTFSWFSQSPDFTT w6TFXIFOZPVXBOUUPTUBSUUIFTFSWFSPOMZ w5$1IPTUBOEQPSUDBOCFTQFDJpFEXJUIFOWJSPONFOU WBSJBCMFT w$RUBOCOP_SERVER_HOST w$RUBOCOP_SERVER_PORT wFH3VCP$PQ4FSWFSSVOTBT%PDLFSDPOUBJOFSBOE VTFSVTFTMJLFrubocop-daemon-wrapperPOIPTUNBDIJOF --start-server

w4UPQ3VCP$PQTFSWFSQSPDFTT w6TFUIJTPQUJPOXIFOTFSWFS NPEFJTVOTUBCMF wFH6QEBUFHFN DPOpHVSBUJPO BOEFUD --stop-server

w3FTUBSUTFSWFSQSPDFTT w4IPSUIBOEGPSTUPQBOETUBSU w:PVNBZVTFJUBGUFSbundle updateXIFO3VCP$PQTFSWFSJT VOTUBCMF --restart-server

w:PVDBODPOpSNTFSWFS TUBUVT w4IPXOXJUI1*%XIFOSVOOJOH --server-status % rubocop --server-status RuboCop server (25960)
is running. % rubocop --server-status RuboCop server is not running.

w:PVDBOBMTPDPOpSNrubocop -V w+serverJTBEEFE w-VPQUJPOQSPWJEFTJOGPVTFEJOJTTVFSFQPSUT w-JLFruby -vGPSFOBCMF:+*5 +YJITJTBEEFE rubocop -V -BSHF7
% ruby --yjit -ve 'RubyVM::YJIT.enabled?' ruby 3.2.0dev (2022-09-08T05:31:42Z master 78af05ba0f) +YJIT [x86_64-darwin19] % rubocop -V 1.36.0 (using Parser 3.1.2.1, rubocop-ast 1.21.0, running on ruby 3.2.0) +server [x86_64-darwin19]

" 3VOrubocopXJUIPVUTFSWFS QSPDFTTJGUIFQSPDFTTJTOPU SVOOJOH # 3VOrubocopXJUITFSWFSQSPDFTT JGUIFQSPDFTTJTSVOOJOH /PTFSWFSPQUJPOTHJWFO

w*GZPVFODPVOUFSFE VOFYQFDUFECFIBWJPST 3VO rubocop--restart-server w"OEZPVDBOPQFOBOJTTVFUP UIFSVCPDPQSVCPDPQSFQP "UUFOUJPOT

"HFOEB

4FSWFSQSPDFTTBOE DBDIJOHpMFT

w3VCP$PQTFSWFSNPEF VTFT5$1*1QSPUPDPM w*ULFFQTUIFTFSWFST1*% FUDJOUIFDBDIFEJSFDUPSZ "CPVUUIFTFSWFSNPEFQSPUPDPM

$MJFOU1SPDFTT 1*% TU4UBSUBOEFYFDUIFTFSWFS 4FSWFS1SPDFTT 1*% client % rubocop --server server
4UBSUBOFXTFSWFSQSPDFTTBOEHFUUIF1*% Socket

DBDIFSVCPDPQ@DBDIFTFSWFS $MJFOU1SPDFTT 1*% TU4UBSUBOEFYFDUIFTFSWFS 4FSWFS1SPDFTT 1*% % rubocop --server 8SJUFQJE
QPSU WFSTJPO BOEPUIFSTUPDBDIFpMFT QJE QPSU WFSTJPO Disk IO client server

DBDIFSVCPDPQ@DBDIFTFSWFS $MJFOU1SPDFTT 1*% OE&YFDUIFTFSWFS 4FSWFS1SPDFTT 1*% % rubocop --server 3FBEQJE
QPSU WFSTJPO BOEPUIFSTUPDBDIFpMFT QJE QPSU WFSTJPO $MJFOU1SPDFTT 1*% % rubocop (--server) Disk IO client server

DBDIFSVCPDPQ@DBDIFTFSWFS $MJFOU1SPDFTT 1*% OE&YFDUIFTFSWFS 4FSWFS1SPDFTT 1*% % rubocop --server $POOFDUUPUIFTFSWFSQSPDFTTBOEJOTQFDUJPO
QJE QPSU WFSTJPO $MJFOU1SPDFTT 1*% % rubocop (--server) Socket client server

DBDIFSVCPDPQ@DBDIFTFSWFS $MJFOU1SPDFTT 1*% 5IFDBDIFEJSFDUPSZ 4FSWFS1SPDFTT 1*% % rubocop --server 5IFDBDIFJTQMBDFEJO~/.cacheEJSFDUPSZCZEFGBVMU
QJE QPSU WFSTJPO $MJFOU1SPDFTT 1*% % rubocop (--server) client server

DBDIFSVCPDPQ@DBDIFTFSWFS $MJFOU1SPDFTT 1*% 5IFDBDIFEJSFDUPSZ 4FSWFS1SPDFTT 1*% % rubocop --server 3FTUBSUUIFQSPDFTTXIFOBGUFSbundle
update QJE QPSU WFSTJPO $MJFOU1SPDFTT 1*% % rubocop (--server) 5IFDMJFOUDPNNBOESFTUBSUTUIFTFSWFS QSPDFTTJGJUEFUFDUTJODPNQBUJCMFWFSTJPO client server

w6OGPSUVOBUFMZJUTTUJMMBCJU FYQFSJNFOUBM wrubocop --restart-serverXJMM TUJMMCFOFDFTTBSZJOTPNF TJUVBUJPOT $BOTFSWFSNPEFCFUIFEFGBVMU

w.BLFBVUPSFMPBEBXBSFPG VQHSBEJOHSEQBSUZHFNT w6/*9EPNBJOTPDLFUPQUJPOJGGBTUFS w1SPWJEFTPQUJPOTGPSTIPSUBMJBTFT w4VQQPSU+3VCZ 4FSWFSNPEFFOIBODFEQMBOT

wrubocop --serverDBONBLF 3VCP$PQGBTUFS wrubocop --restart-serverNBZ TPMWFZPVSTFSWFSNPEFJTTVF 6TFGVMPQUJPOT

-FBSOGSPNZFTUFSEBZ rubocop.org MJWFGPSUPEBZ IPQFGPSUPNPSSPX ʔAlbert Einstein

Make RuboCop Super Fast

Make RuboCop Super Fast

More Decks by Koichi ITO

Other Decks in Programming

Featured

Transcript