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Git தڃऀʹͳΔͨΊͷ rebase ೖ # ୈ9ճϥϯνLT @takasp 20214݄16
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ࣗݾհ • @takasp a.k.a. tackey • ࡛ۄݝੜ·Ε౦ژҭͪ • झຯɿΪλʔɺϐΞϊ • ྖҬɿόοΫΤϯυ ɹɹɹΠϯϑϥ
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ௌߨରऀ • Git ͷ add, commit, push ͳͲͷجຊίϚϯυཧղ ͍ͯ͠Δਓ • rebase Βͳ͍ਓ • rebase ͬͯΔ͚Ͳɺͬͨ͜ͱͳ͍ɺ͚ͬͨͲ Α͔͘Βͳ͍ਓ • rebase ΛͲ͏͍͏࣌ʹͬͨΒྑ͍͔͔Βͳ͍ਓ
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git rebase ίϚϯυͱ • Ұ࿈ͷίϛοτཤྺΛमਖ਼͢ΔίϚϯυ • ྫ͑ • ҎલͷίϛοτϝοηʔδΛमਖ਼͢Δ • ෳͷίϛοτΛ·ͱΊΔ • ෆཁʹͳͬͨίϛοτΛআ͢Δ
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git merge
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git merge ίϚϯυͷ͓͞Β͍ • ผͷϒϥϯνͷมߋΛऔΓࠐΉ߹ • Ϛʔδͷ݁Ռେ͖͘ 3 ͭʹ͚ΒΕΔ • Fast Forward : ยํͷϒϥϯν͕ݹ͘ɺऔΓࠐΈઌͷϒϥϯν͕ͦ ͷ··औΓࠐΉ߹ • Auto Merge : ಉ͡ϑΝΠϧͷมߋ͕͋ΓɺࣗಈͰϚʔδͰ͖Δ߹ • Conflict : ಉ͡ϑΝΠϧͷಉ͡ՕॴΛมߋ͍ͯͯ͠ɺGit ʹஅ͕ Ͱ͖ͳ͍߹
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git mergeʢFast Forwardʣ • લʹਐΉ͚ͩ 1 2 3 task main
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git mergeʢFast Forwardʣ • લʹਐΉ͚ͩ 1 2 3 task main merge
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git mergeʢAuto Mergeʣ • Ϛʔδίϛοτ͕ൃߦ͞ΕΔ 1 2 3 4 task main
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git mergeʢAuto Mergeʣ • Ϛʔδίϛοτ͕ൃߦ͞ΕΔ 1 2 3 merge 4 task main 5
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• ಉ͡ߦΛฤू͍ͯͯ͠ Git ͕ղܾͰ͖ͳ͍ git mergeʢConflictʣ 1 2 3 4 task main
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• ಉ͡ߦΛฤू͍ͯͯ͠ Git ͕ղܾͰ͖ͳ͍ git mergeʢConflictʣ 1 2 3 merge 4 task main Conflict
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git rebase
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git mergeʢAuto Mergeʣ࠶ܝ • Ϛʔδίϛοτ͕ൃߦ͞ΕΔ 1 2 3 merge 4 task main 5
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git rebase • task ϒϥϯν͕ main ϒϥϯνʹ࠶ద༻͞Εɺ Fast Forward ϚʔδͰ͖Δ 1 2 3 4 task main
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git rebase • task ϒϥϯν͕ main ϒϥϯνʹ࠶ద༻͞Εɺ Fast Forward ϚʔδͰ͖Δ 1 2 3 rebase 4 task main 4’
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git rebase -i (--interactive) • ҎԼͷૢ࡞͕ߦ͑Δ • drop : ίϛοτΛআ͢Δ • exec : ίϛοτʹରͯ͠ shell ΛͬͯίϚϯυΛ࣮ߦ͢Δ • fixup : ίϛοτΛ·ͱΊΔ • squash : ίϛοτΛ·ͱΊͯɺίϛοτϝοηʔδΛฤू͢Δ • edit : ίϛοτʹมߋΛՃ͑Δ • reword : ίϛοτϝοηʔδΛฤू͢Δ • pick : ίϛοτΛݱঢ়ҡ࣋͢Δ
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merge ͱ rebase ͷҧ͍ • merge • ίϛοτཤྺΛഁյ͠ͳ͍ • ෆཁͳίϛοτϚʔδίϛοτ͕ଟ͍ͱ ཤྺΛӾཡͮ͠Β͍ • rebase • ίϛοτཤྺ͕៉ྷʹͳΔ • ҧ͏ίϛοτͱͯ͠࠶࡞͞ΕΔ
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git rebase ͷҙ • ϦϞʔτϦϙδτϦʹެ։ͨ͠ίϛοτ rebase ͠ͳ͍͜ͱ͕·͍͠ • ίϛοτͷվม͕ՄೳͳͷͰɺଞͷϢʔβʔ ͕༻͢Δ߹ Pull Request ͰϨϏϡʔΛ ड͚Δίϛοτͷ༰Λมߋͯ͠͠·͏
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git rebase Λ͏Ϟνϕʔγϣϯ ͱ͍ಓ • ޙ͔ΒίϛοτཤྺΛݟͨ࣌ʹԿΛ͍ͯ͠Δ͔ ͔Γ͍ͨ͘͢͠ • ϩʔΧϧϒϥϯνʹϚʔδίϛοτΛੜͤͣ ʹɺϦϞʔτϒϥϯνͷมߋΛऔΓࠐΈ͍ͨ࣌ • ίϛοτͷॱ൪Λม͍͑ͨͱ͖ • ίϛοτΛ·ͱΊ͍ͨͱ͖
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git pull
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ϦϞʔτϒϥϯνͱ ্ྲྀϒϥϯν ϩʔΧϧϦϙδτϦ ϦϞʔτϦϙδτϦ NBJO UBTL PSJHJONBJO PSJHJOUBTL NBJO UBTL ϦϞʔτϒϥϯν origin #"ͷ্ྲྀϒϥϯν "#ͷϦϞʔτϒϥϯν B B A A ϩʔΧϧ ϒϥϯν
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git pull ͷڍಈ • git pull = git fetch + git merge • git fetch : ϦϞʔτϦϙδτϦͷมߋΛ ϦϞʔτϒϥϯνʹऔΓࠐΉ • git pull ίϚϯυͰҾΛলུͯ͠ಈ࡞͢Δ ͷɺ্ྲྀϒϥϯν͕ઃఆ͞Ε͍ͯΔͨΊ
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git pull ͷڍಈ ϩʔΧϧϦϙδτϦ ϦϞʔτϦϙδτϦ NBJO UBTL PSJHJONBJO PSJHJOUBTL NBJO UBTL ϦϞʔτϒϥϯν origin ϩʔΧϧ ϒϥϯν git merge git fetch git pull
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git pull -r (--rebase) • git merge ͷڍಈΛ git rebase ʹม͑Δ͜ͱ͕Ͱ͖Δ • git pull ࣌ʹൃੜՄೳੑͷ͋ΔϚʔδίϛοτΛ ࡞ͨ͘͠ͳ͍߹ίϛοτϩάΛ៉ྷʹ ͠ͳ͕ΒมߋΛऔΓࠐΈ͍ͨ߹ʹ༻͢Δ • git rebase ͷίϛοτվมͷՄೳੑ͕͋ΔͷͰɺ push લͳͲͷར༻ʹݶΔ΄͏͕ྑ͍
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git pull -r ͷڍಈ ϩʔΧϧϦϙδτϦ ϦϞʔτϦϙδτϦ NBJO UBTL PSJHJONBJO PSJHJOUBTL NBJO UBTL ϦϞʔτϒϥϯν origin ϩʔΧϧ ϒϥϯν git rebase git fetch git pull -r
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DEMO
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·ͱΊ
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·ͱΊ • git rebase Λ͏ͱίϛοτཤྺ͕៉ྷʹͳΔ • ίϛοτվมΛ͏ͷͰ༻๏༻ྔΛक͍ͬͯ ·͠ΐ͏