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今度こそ理解する/git-reset-200822
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masuyama13
August 22, 2020
Programming
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今度こそ理解する/git-reset-200822
masuyama13
August 22, 2020
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Transcript
GIT RESET ࠓͦ͜ཧղ͢Δ 2020.08.22 FJORD BOOT CAMP LTձ
ൃද༰ GIT RESET ▸ git reset ͷಈ͖ ▸ ——softɺ——hardɺΦϓγϣϯলུʢ——mixedʣ ▸
HEAD ͱ ▸ ΠϯσοΫεͱ ࠓͦ͜ཧղ͢Δ
ࣗݾհ @masuyama13 ‣ ڈ12݄ʙ FjordBootCamp ࢀՃ ‣ ݱࡏͷϓϥΫςΟε ‣ ΦϒδΣΫτࢦϓϩάϥϛϯά
‣ ݩࢢॴ৬һʢࣄʣ ‣ ࣛࣇౡग़ https://masuyama13.hatenablog.com/ 4݄͔Βຖϒϩάߋ৽தʂ
ݱࡏͷ HEAD Λࢦఆ͞Εͨ ঢ়ଶʹ͢ɻ git reset Reset current HEAD to
the specified state
HEAD Λ͢ git reset —-softɹHEAD ͚ͩ͢ [—-mixed]ɹΠϯσοΫε͢ —-hardɹΠϯσοΫεͱϫʔΫπϦʔ͢
ϫʔΫπϦʔ git commit git add ϦϙδτϦ master A A A
touch A ϒϥϯνɿ ɾಛఆͷίϛοτΛࢦࣔ͢͠ϙΠϯλ ɾσϑΥϧτ͕ master ɾ࠷ॳͷίϛοτΛͨ࣌͠Ͱൃੜ ɾࢬ͔Εͷઌ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ ίϛοτ༧ఆͷͷΛొ͢Δॴ ϑΝΠϧฤूͳͲΛߦ͏࡞ۀॴ ʮίϛοτʯ ͕Ͱ͖Δ
ϦϙδτϦ ϫʔΫπϦʔ git commit git add HEAD master ɾݱࡏͷϒϥϯνΛࢦࣔ͢͠ϙΠϯλ ɾ࣍ͷίϛοτͷʹͳΔ
A A A ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ ίϛοτ༧ఆͷͷΛొ͢Δॴ ϑΝΠϧฤूͳͲΛߦ͏࡞ۀॴ ʮίϛοτʯ ͕Ͱ͖Δ
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A HEAD master HEAD master A A A git commit git add ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A HEAD master A A A git commit git add git commit git add B B B A A A C C C HEAD master ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A A A A git commit git add git commit git add B B B A A A C C C HEAD master ͜ͷίϛοτऔΓফ͍ͨ͠ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
HEAD Λ͢ git reset —-softɹHEAD ͚ͩ͢ [—-mixed]ɹΠϯσοΫε͢ —-hardɹΠϯσοΫεͱϫʔΫπϦʔ͢
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A A A A git commit git add git commit git add B B B A A A C C C HEAD master HEAD master औΓফ͢ git reset —-soft HEAD~ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A A A A git commit git add git commit git add B B B A A A C C C HEAD master HEAD master औΓফ͢ git reset HEAD~ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ ϦϙδτϦ git commit git add B B B A
A A A A A git commit git add git commit git add B B B A A A C C C HEAD master HEAD master औΓফ͢ git reset —-hard HEAD~ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
݁ߏ୯७ʁ
ΠϯσοΫε ͬͯԿʁ ʢεςʔδϯάΤϦΞʣ ίϛοτ͢Δલʹొ͠ͳ͍ͱ ͍͚ͳ͍ॴɾɾɾ ਖ਼ɺਂ͘ߟ͑ͨ͜ͱͳ͍
git commit ϫʔΫπϦʔ ϦϙδτϦ git add B B B A
A A A A git commit git add HEAD master HEAD master ͚ࠩͩ צҧ͍ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
git commit ϫʔΫπϦʔ ϦϙδτϦ git add B B B A
A A A A git commit git add git commit git add B B A A C C C HEAD master HEAD master ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
git commit ϫʔΫπϦʔ ϦϙδτϦ git add B B B A
A A A A git commit git add git commit git add B B A A C C C HEAD master HEAD master git reset —-soft HEAD~2 औΓফ͢ BΠϯσοΫε͔Β ফ͑ͪΌ͏!? ˞ޡΓͰ͢ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ git commit git add ϦϙδτϦ HEAD master A A
A ࣍ͷίϛοτͷεφοϓγϣοτ εφοϓγϣοτɿ ؙ͝ͱίϐʔͨ͠ͷ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ git add A A ࣍ͷίϛοτͷεφοϓγϣοτ εφοϓγϣοτɿ ؙ͝ͱίϐʔͨ͠ͷ git ls-files
ΠϯσοΫεʹ͋ΔϑΝΠϧͷϦετΛදࣔ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ϫʔΫπϦʔ ϦϙδτϦ ʁʁʁ git add B A A A A
git commit git add git ls-files HEAD master ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ A B
git commit ϫʔΫπϦʔ ϦϙδτϦ git add B B B A
A A A A A git commit git add git commit git add B B B A A A C C C HEAD master HEAD master git reset —-soft HEAD~2 औΓফ͢ ΠϯσοΫε ʢεςʔδϯάΤϦΞʣ
ࠓͦ͜ཧղ͢Δ GIT RESET ·ͱΊ —-softɹHEAD ͚ͩ͢ [—-mixed]ɹHEAD ͱΠϯσοΫεΛ͢ —-hardɹHEAD ͱΠϯσοΫεͱϫʔΫπϦʔΛ͢
git reset ࠩͰͳ͘ɺίϛοτީิΛؙ͝ͱίϐʔͨ͠ͷ ͕อଘ͞Ε͍ͯΔ ΠϯσοΫεʢεςʔδϯάΤϦΞʣ
ࠓͦ͜ཧղ͢Δ GIT RESET ࢀߟࢿྉ ▸ Git ▸ https://git-scm.com/ ▸ αϧઌੜͷGitೖ
▸ https://backlog.com/ja/git-tutorial/ ▸ GitͷεςʔδϯάྖҬͷਖ਼ମΛ୳Δ | ϝϧΧϦΤϯδχΞϦϯά ▸ https://engineering.mercari.com/blog/entry/2017-04-06-171430/ ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠