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Git Bootcamp
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Recruit Technologies
June 02, 2017
Technology
5
40k
Git Bootcamp
2017年4~5月開催「ブートキャンプ特別講座」の資料になります。
Recruit Technologies
June 02, 2017
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Transcript
Git Bootcamp 2017, 12th April @ Recruit Technologies
Git Bootcamp • ΧϦΩϡϥϜ • Git-it Ͱ Git ͷ͍ํΛମܥతʹֶͿ •
Git Tips ू • ͜Μͳ࣌Ͳ͏͢Δʁ Git ԋशฤ • ࣮ࡍʹGitHubͰNode.jsʹίϯτϦϏϡʔτͯ͠ΈΔ
Gitͱ • ࢄόʔδϣϯཧγεςϜ • "ࢄ"ͷ෦ʹ͔ͳΓྗ͞ΕͯΔ • ࠓ։ൃऀͰͷdefact standard
Git Χϧλ • GitͷΠϝʔδΛڧԽͤ͞ΔͨΊͷΧϧλ • ্ख͘ΠϝʔδΛͭͳ͛ΒΕΔͰ͠ΐ͏͔
A B C D
A B C D git checkout -b fix/42
A B C D git checkout -b fix/42; git commit
A B C D git merge --ff-only
A B C D git merge --no-ff
ͬͱ׳Ε͍͖ͯ·͠ΐ͏
Git it Λ࣮ߦ͢Δ • Լهͷͱ͜Ζ͔Βμϯϩʔυ࣮ͯ͠ߦ • https://github.com/jlord/git-it-electron/releases • ΞϓϦέʔγϣϯϑΥϧμͷԼʹgit-itΛஔ্ͨ͠Ͱ ࣮ߦ͍ͯͩ͘͠͞
• securityͷΤϥʔ͕ग़ͨΒઃఆ>ηΩϡϦςΟͱϓϥΠ όγ>μϯϩʔυͨ͠ΞϓϦέʔγϣϯͷ࣮ߦڐՄ> ͯ͢ͷΞϓϦέʔγϣϯΛڐՄʢ͋ͱͰͯ͠Ͷʣ
Git it Λ࣮ߦ͢Δ • େମ1࣌ؒ͘Β͍Λ҆ʹશ෦ճ͍ͯͩ͘͠͞ɻ • git ͷίϚϯυʹ৮Εͭͭ͜ͷػձʹGitHubͷ ΞΧϯτ͕ͳ͍ਓ࡞͓͖ͬͯ·͠ΐ͏ɻ •
ૣ͍ਓͰ1࣌ؒ͘Β͍ɺͯ͘2࣌ؒ͘Β͍Ͱऴ ΘΔҹͰ͕͢ɺऴΘΓํ࣍ୈͰ࣍ͷΧϦΩϡϥ ϜΛܾΊ·͢ɻ
͍͍ͩͨΈΜͳ͕ऴΘͬͨΒ ࣍ʹਐΈ·͢
ͦͷલʹ • ΈΜͳͷҙݟ͕ฉ͍ͯΈ͍ͨ • GitͬͯҰޱʹݴͬͯΈΜͳ͕Γ͍ͨॴ ࠔͬͯΔͱ͜ΖΛڞ༗͓͖͍ͯͨ͠ • ͦͷ্Ͱ͕Θ͔ΔݟΛڞ༗͢Δ
Git খ࢙
NOTE: ͜Ε͔Β͢શ͘ʹཱ ͪ·ͤΜɻ ιϑτΣΞখͱͯ͠ฉ͍ ͍ͯͩ͘͞ɻ
Gitখ࢙ • Linus TorvaldsɺLinuxΛ࡞ͬͨࠓΛੜ͖Δι ϑτΣΞͷઆ͕LinuxͷΧʔωϧΛཧ͢ ΔͨΊʹ2िؒͰ։ൃͨ͠ͷ͕Git
Gitখ࢙ • Before Git: 90ޙɺLinuxΧʔωϧί ϛϡχςΟͱ͋Δʹৗʹ·͞Ε͍ͯͨ • ͱ͋ΔͱɺΧʔωϧ։ൃऀ͕ଟ͘ͳͬͯ ͖ͨ͜ͱʹؔΘΒͣɺશһ͕ϋοϐʔʹͳΔ SCM(Software
Configuration Management) πʔϧ͕ଘࡏ͠ͳ͍͜ͱͰ͢ɻ
Gitখ࢙ • Before Git: Linus Torvalds CVS Λௐࠪ͠ ·ͨ͠ɻ͔ͦ͠͠ͷ݁Ռɻɻɻ
Gitখ࢙ • Before Git: Linus Torvalds CVS Λௐࠪ͠ ·ͨ͠ɻ͔ͦ͠͠ͷ݁Ռɻɻɻ
࠷ѱ
Gitখ࢙ • Before Git: tarball, diff, patch Ͱӡ༻͢Δ ɺࣗͰίϯϑϦΫτղফͨ͠Γɺpatchͷ ϚʔδΛͨ͠Γͯͨ͠ͷͰɺɺɺ
ແཧʂ
Ұํͦͷࠒ
Gitখ࢙ • Before Git: Larry McVoy (Sun Microsystems ͷΤϯδχΞ)͕BitKeeperͱݺΕΔࢄ όʔδϣϯཧγεςϜΛ࡞Δ
Hey Linus! ͜ΕͲ͏ΑʁLinux։ൃʹऔΓೖΕͯ Έͳ͍ʁ
Gitখ࢙ • Larry McVoy: BitKeeper Λ࡞ΔͨΊͷձࣾͰ ͋Δ BitMover Λ࢝ΊΔɻ BitKeeper
ͬͯΊͯ͘Εʔ
Gitখ࢙ • LinusୡBitKeeperΛ͍࢝Ίɺ݁Ռͱͯ͠ LinuxΧʔωϧϋοΧʔͷଟ͘ϋοϐʔʹɻ BitKeeper ͍͍͡ΌΜ
͔͠͠
Gitখ࢙ • BitKeeperʹผͳ͕͋Γ·ͨ͠ • BitKeeperͷϥΠηϯεएׯ෩มΘΓ • BitKeeperOSSʹؔΘΒͣɺϑϦʔͰ͏ ͨΊʹશͯͷChangeLogΛެ։͠ͳ͍ͱ͍ ͚ͳ͍ͱ͍͏ͷ
Gitখ࢙ • ΤϯλʔϓϥΠζͰBitKeeperΛ͏ʹ༻ ϥΠηϯεΛങͬͯprivateͰӡ༻͢Δඞཁ͕ ͋Δ • BitKeeperΛforkͯ͠উखʹެ։͞Εͳ͍Α͏ ͳpatchΛద༻͢Δౕग़͖ͯͯϥΠηϯεҧ Λ͖͗Εͳ͘ͳΔڪΕ͋ͬͨ
Gitখ࢙ • ఔͳͯ͘͠BitKeeperͷιʔείʔυOpen Ͱͳ͘ͳͬͯ͠·ͬͨɻ BitKeeperͷίʔυOSSͰͳ͘͠·͢
Gitখ࢙ • LinuxΧʔωϧͷϝϯόʔ͜Εʹࠔ͠·͠ ͨɺLinuxͱ͍͏OSSͷਃ͠ࢠͱݴ͏͖ ιϑτΣΞͷιʔεOSSͰཧ͞Ε͍ͯ ͳ͍ͷͰ͢ɻ
Gitখ࢙ • Linus͔Β͢Ειʔείʔυ͕ཧͰ͖Ε ͍͍ͷͰͦͷลͷಛʹؾʹͯ͠ͳ͔ͬ ͕ͨɺBitKeeperͷͦͷ··फڭɾ࣏ ૪ʹͳ͍͖ͬͯ·ͨ͠ɾɾɾ ͕͋ΔͳΒͬͱ͍͍ͷ Λ࡞ͬͯ͘ΕΑ
Gitখ࢙ • Andrew Tridgell: rsync/Sambaͷ࡞ऀ BitKeeperͷϦόʔεΤϯδχ ΞϦϯάͯ͠৽͍͠ͷ࡞Ζ͏
Gitখ࢙ • BitKeeperΛΤϛϡϨʔτ͢ΔίʔυΛॻ͍ͯ શʹϦόʔεΤϯδχΞϦϯά͢Δମ੍ • ͦΕʹؾ͍ͮͨBitKeeperଆ҉߸ԽͳͲͰର ࡦ • LinuxଆͱBitKeeperଆͷؔѱԽ͍͖ͯ͠ ·ͨ͠
Gitখ࢙ • LinusͷݟղɿBitKeeperΛ͑Δͬͱ͍͍ ͷΛ࡞ͬͯͳ͍ɺͬͯΔ͜ͱΠλζϥʹ ؔΛѱԽ͍ͤͯ͞Δ͚ͩͩɻ फڭɾ࣏૪͏Μ͟Γͩ
Gitখ࢙ • Larry / Linus 2005ʹిͰձٞΛ͠ɺ ࣌ؒͷٞͷɺBitKeeperΛLinuxͰΘ ͳ͍ࣄ͕ܾ·Γ·ͨ͠ɻ ܾผͷ࣌
Gitখ࢙ • ͔ͦ͜ΒͷLinusͷಈ͖ߴͰͨ͠ɻ • ͍͔ͭ͘طଘͷࢄཧγεςϜΛௐࠪ͠ɺ ͍ʹͳΒͳ͍ͱஅ • ϑϧεΫϥονͰॻ͖͢͜ͱʹܾఆ
Gitখ࢙ • 1Ͱಈ͘ͱ͜Ζ·Ͱ࡞Γɺ2Ͱgitʹର͠ ͯgitͦͷͷΛίʔυཧͤ͞Δ͜ͱʹޭ (self hosting) • 2िؒޙʹLinuxΧʔωϧΛ͜ΕͰཧ͠Α ͏ͱϝʔϦϯάϦετʹpost •
2िؒͰgit͕Ͱ͖ͨͱݴΘΕ͍ͯΔ
Gitখ࢙ $ git log e83c516 commit e83c5163316f89bfbde7d9ab23ca2e25604af290 Author: Linus Torvalds
<
[email protected]
> Date: Thu Apr 7 15:13:13 2005 -0700 Initial revision of "git", the information manager from hell
Gitখ࢙ • 4݄3͔Β։ൃΛ࢝Ίͯɺ4݄7ʹͳΜΒ ͔ͷͷ͕ಈ͍͍ͯͯɺ4݄16ʹlinux ΧʔωϧΛ֨ೲͰ͖Δ·ͰʹͳΔɻ͜Ε͕2ि ؒΒͣͰgitΛ࡞ͬͨͱݴΘΕΔΏ͑ΜͰ͋ Δɻ
Git খ
Gitখ • gitͷMLͰɺͳͥgitͰC++ΛΘͳ͍ͷ͔ͱ͍ ͏࣭ʹରͯ͠ɺLinusͷճ > > GitͷιʔείʔυΛ࢝ΊͯΈͨ࣌ɺ2ͭͷ͜ͱ͕಄ʹͻ͔͔ͬͬͨɻ > 1. C++͡Όͳͯ͘७ਮͳCɻཧ༝ෆ໌ɻҠ২ੑͱ͔ݴΘͳ͍ͰΑɻ
> Ϋιͩɻ Ϋι·ΈΕͳͷΦϝʔͷํͩɻ C++൵ࢂͳݴޠͩɻ͔͠ɺগͳ͔Β͵ͷϓϩάϥϚʔ͕͍ͬͯͯɺશແܽͷͲ͏͠Α͏ͳ͍Ϋι Λੜ͢Δͷ͕ΊͪΌΊͪΌ؆୯ʹͳ͍ͬͯΔͱ͍͏ͰɺΑ͚͍ʹ൵ࢂͩɻϚδͰɺCΛબ͢Δཧ༝͕ ʮԿͳ͔ͬͨʯͱͯͩ͠ɺC++ϓϩάϥϚʔආ͚ʹͳΔͱ͍͏͚ͩͰɺCΛ͏େ໊ٛʹͳΔɻ
Git Tipsू
Git Tips • ͕GitΛ͏্Ͱ͍ͬͯΔࣄΛڭ͑ͯݟ Λڞ༗͠·͢
Git Tips ͦͷ1: Tig
Git Tips ͦͷ1: Tig • gitΛ͍͘͢͢Δπʔϧ • ݸਓతʹ͜Ε͕ͳ͍ͱgit͑ͳ͍͍ͬͯ͏ Ґ͍͍͢ •
tig Ͱ add ͨ͠Γ tig ͰऔΓফͨ͠Γ͢ΔͷΛ Α͘Δ
DEMO
Git Tips ͦͷ2: git hook
Git Tips ͦͷ2: git hook • git Ͱίϛοτ࣌push࣌ʹίϚϯυΛ࣮ߦ ͢Δπʔϧ •
node.jsϓϩδΣΫτͰhusky͍ͬͯ͏πʔ ϧ͕͋ͬͯͦΕΛͬͯhookͤ͞Δ͜ͱ͕ଟ ͍
DEMO
Git Tips ͦͷ3: git diff algorithm
None
None
git diff --histogram ͋Δ
͜Μͳͱ͖Ͳ͏͢Δʁ Git͓ࠔΓ࣌ͷϔϧϓ
͏͔ͬΓؒҧͬͯadd/commit ͯ͠͠·ͬͨͷΛݩʹ͢
͏͔ͬΓؒҧͬͯadd/commit ͨ͠ͱ͖ # git reset Λ͍·͠ΐ͏ $ git reset --soft
HEAD^ // ҰݸલͷίϛοτΛऔফ͠ $ git reset --soft HEAD^^ // ೋݸલͷίϛοτΛऔΓফ͢ # ͪͳΈʹ tig ͰΔͱ add ͷ߹ͬͱ؆୯ $ tig status
͏͔ͬΓؒҧͬͯpushͯ͠͠ ·ͬͨͷΛݩʹ͢
͏͔ͬΓؒҧͬͯpushͨ͠ͱ͖ # ·ͣɺνʔϜ։ൃத master ͷpushۃྗආ͚Δ (Pull RequestϕʔεͰશһ͕ ࢹͰ͖ΔΑ͏ʹ͠ͳ͕Β։ൃ͢Δʣ # masterҎ֎ͷϒϥϯνʢࣗͷϒϥϯνͳΒpushͯ͠औΓฦ͕ͭ͘͠ʣ
# master ͷ߹ɺͦͷλΠϛϯάͰclone͞ΕͨΓpull͞ΕͨΓ͢Δͱඇৗʹ໘ͳ͜ͱʹ ͳΔ $ git rebase -i Ͱpushͯ͠͠·ͬͨίϛοτΛऔΓফ͢ $ ͜ͷ git rebase ͕ΊͬͪΌ͏ $ git rebase -i ͢ΔͱΤσΟλ͕։͘ͷͰɺͦͷΤσΟλ্Ͱ֘ίϛοτΛআ $ আͨ͠Β git push -f Ͱforce push $ master ͷ force push ݫېͳ͕࣌͋ΔͷͰඇৗʹؾΛ͚ͭΔ
͏͔ͬΓؒҧͬͯmaster mergeͯ͠͠·ͬͨͷΛݩ ʹ͢
͏͔ͬΓؒҧͬͯmaster merge ͨ͠ͱ͖ # جຊ revert ͢Δ # master ʹpush͞ΕͨͷΛ҆શʹऔΓফ͢ͷrevertͰΔͷ͕ྑ͍
# ͨͩ͠ɺrevert͢Δͱrevert commit(औΓফͨ͢Ίͷcommit͕ͭ͘) # git ͷຊདྷతͳ͍ํͱͯ͠revert͕ਖ਼͍͠ $ git revert HEAD~2 (ೋݸલͷίϛοτΛrevert)
ผͷϒϥϯν͔Βίϛοτ͠ ͯ͠·ͬͨͷͰऔΓࠐΈ͍ͨ
ผͷϒϥϯν͔Βίϛοτͯ͠ ͠·ͬͨͷͰऔΓࠐΈ͍ͨ # cherry pick # ίϛοτͨ͠ͷΛcherry-pickͯ͠ผϒϥϯνʹίϛοτͨ͜͠ͱʹ͢Δ $ git cherry-pick
<ίϛοτ൪߸> # pushͯ͠ͳ͚ΕҰ୴reset --soft ͯͦ͠ΕΛผϒϥϯνʹͯ͠push͢Δํ͕ଟ͍͔ɻ
ίϛοτͨ͋͠ͱͰtypo͕ ͋ͬͯtypoͨ͠Βtypo͕typo ͯͨ͠
ίϛοτͨ͋͠ͱͰtypo͕͋ͬͯ typoͨ͠Βtypo͕typoͯͨ͠ # git log fix: typo fix: typo feat:
Add new feature Έ͍ͨͳͱ͖ # git rebase -i HEAD~{3} ͔ͯ͠Β औΓࠐΈ͍ͨͭͱऔΓࠐΈͨ͘ͳ͍ͭΛ͚ͯϚʔδ͢Δ
ίϛοτͨ͋͠ͱͰtypo͕͋ͬͯ typoͨ͠Βtypo͕typoͯͨ͠ ίϛοτϝοηʔδΛ fixup ͱ͔ squash ʹ͓ͯ͘͠ͱ git rebase -i
--autosquash Ͱϋο ϐʔʹͳΔ git commit --fixup <COMMIT ID> Ͱྑ͍ ※ autosquashΛ͏࣌લͷίϛοτͷϝοηʔδͷઌ಄จࣈؚ͕·Ε͍ͯΔඞཁ͕ ͋Δɻ
Trial github.com/recruit-tech/git- bootcamp
passwordΛ͏͔ͬΓೖΕ ͪΌͬͨͷͰաڈͷίϛοτ ͔Βશͯআ͍ͨ͠
passwordΛ͏͔ͬΓೖΕͪΌͬͨͷ Ͱաڈͷίϛοτ͔Βશͯআ͍ͨ͠ # git filter-branch Λ͏ $ git filter-branch -f
--tree-filter 'rm -f password.txt' HEAD $ git push origin master --force
Trial github.com/recruit-tech/git- bootcamp
git commit Ͱͬͨemail/ nameΛม͍͑ͨ
passwordΛ͏͔ͬΓೖΕͪΌͬͨͷ Ͱաڈͷίϛοτ͔Βશͯআ͍ͨ͠ # git filter-branch ͷ commit-filter Λ͏ $ git
filter-branch -f --commit-filter 'if [ "$GIT_AUTHOR_EMAIL" = "
[email protected]
" ]; then GIT_AUTHOR_NAME="Yochan"; GIT_AUTHOR_EMAIL="
[email protected]
"; git commit-tree "$@"; else git commit-tree "$@"; fi' HEAD
Trial github.com/recruit-tech/git- bootcamp
SVN͔ΒGitʹӡ༻ม͍͑ͨΜ ͚ͩͲɻ
SVN͔ΒGitʹӡ༻ม͍͑ͨΜ ͚ͩͲɻ • SVN => தԝूݖܕ • Git => ࢄܕ
• Ұ൪͍͍ͷGithub͕ࠓσϑΝΫτελϯμʔυͳͷ ͰɺͦΕҎ֎ͰΔͳΒ߱ΓΔͧͬͯڴͯ͠ՄɻͦΕ Ͱฆڄͨ͠ΒΛݺΜͰ͍ͩ͘͞ɻ • see: http://qiita.com/YusukeHosonuma/items/ 14c59f3878d640a401a1
GitFlow͕͍͍ͷʁ GitHubFlow͕͍͍ͷʁ http://qiita.com/mint__/ items/ bfc58589b5b1e0a1856a
GitFlow͕͍͍ͷʁGitHubFlow ͕͍͍ͷʁ • ͖ͳͷΛ͏ͱྑ͍ • ͷ͖ͳͷGithubFlowͷํɺmaster͕ ઈର҆ఆՔಇ͓͖ͤͯ͘͞ͱ͍͏ଋ͕क ΒΕ͍ͯΔͳΒͲͪΒͰՄೳ
RepositoryͲͷ୯ҐͰΘ͚Δ ͷ͕͍͍ͷʁ
جຊతʹRepositoryϓϩ δΣΫτͰҰ͕ͭྑ͍ • ϚΠΫϩαʔϏεͰϓϩδΣΫτ͚Δࣄ ଟ͍͕ɺϦϙδτϦ͕͔ΕΔ㲈։ൃऀؒʹ ύʔςΟγϣϯΛઃ͚Δʹ͍͠ • ϓϩδΣΫτΛࣦഊͤ͞Δํ๏ɿhttp:// yosuke-furukawa.hatenablog.com/entry/ 2016/12/31/225913
git reflog
git reflog ࠷ѱϩʔΧϧ͕ফ͑ͨΓϒϥϯν͕ফ͑ͨΓͨ࣌͠ͷ࠷ऴखஈ $ git reset --hard HEAD^^ # HEAD^ͱࢦఆ͢ΔͭΓ͕ؒҧ͑ͨ!
$ git reflog f5cb888 HEAD@{0}: head^^: updating HEAD 05b76fe HEAD@{1}: commit: 2.6.2 a546c2c HEAD@{2}: pull origin master: Fast-forward 843a591 HEAD@{3}: commit: rename package.json authors 6c66867 HEAD@{4}: pull origin master: Fast-forward 3e15c9e HEAD@{5}: checkout: moving from add_recruit_tech_problems to master 4af78a2 HEAD@{5}: commit: feat: add scope $ git reset --hard HEAD@{1} # reset hard લʹΕΔ
git bisect
git bisect Ͳ͔͜Β͔ɺੑೳ͕མͪͨɾςετ͕failʹͳͬͨͷ߹ͰͲ͜ͷίϛοτͰͦͷݱ͕ى ͖ͨͷ͔Λಛఆ͢ΔͨΊͷํ๏ɺೋ୳ࡧͰݕࡧͯ͘͠ΕΔ $ git bisect start HEAD v2.0
# v2.0Ͱେৎ͚ͩͬͨͲHEADͰ͕͋Δ $ git bisect run <ςετίϚϯυ> # ͜ΕͰࣗಈతʹςετ͠ͳ͕Βfail/successͰίϛοτΛݟ͚ͭͯ͘ΕΔ $ git bisect good $ git bisect bad # खಈͰςετ͢ΔͳΒ͜ͷΓํ͕͋Δ
͋Γ͕ͱ͏͍͟͝·ͨ͠