10年を超えるレガシーwebサービスの重複ライブラリを削除してコード量を2:3にした話

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઒ౡܛ(.01&1"#0JOD :"1$"4*")"$)*0+* ೥Λ௒͑ΔϨΨγʔ8FCαʔϏε ͷॏෳϥΠϒϥϦΛ࡟আͯ͠ίʔυ ྔΛʹͨ͠࿩

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ΤϯδχΞ ઒ౡܛ!CBSJF ຊࣾࣄۀ෦+6(&.νʔϜ IUUQOB[POPIJUPKVHFNKQ

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+6(&.

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ಥવͰ͕͢ɺ օ͞Μ͸%3:Ͱͳ͍ίʔυʹ ೰ΜͰ·ͤΜ͔ʁ

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+6(&.Ͱ͸ ͱͯ΋೰ΜͰ͍·ͨ͠

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طଘͷ࡞Γͱ໰୊఺

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ΞϓϦέʔγϣϯίʔυͷߏ଄ w ΞϓϦέʔγϣϯϧʔτ഑Լʹ΋ 1&"3ύοέʔδ͕ஔ͔Ε͍ͯΔ w ϥΠϒϥϦஔ͖৔͕̏ͭ͋Γɺ1&"3 ύοέʔδͱࣗ࡞ΫϥεΛஔ͔Εͯ ͍Δ w ʹܭ̐Օॴʹ1&"3ύοέʔδ͕ ஔ͔Ε͍ͯΔঢ়ଶ w ಉ͡1&"3ύοέʔδ͕߹ܭݸஔ ͔ΕͯΓ͍ͯ͠Δ /path/to/app /path/to/php/lib PEARύοέʔδ … libraryA libraryB PEARύοέʔδ … PEARύοέʔδ … libraryC PEARύοέʔδ …

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͜ͷ࡞Γʹࠔͬͯ·ͨ͠

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MJCSBSZ" MJCSBSZ# ϥΠϒϥϦͷ࢖ΘΕํ 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ࣗ࡞Ϋϥε ΤϯτϦ ϙΠϯτ JODMVEF@QBUIʹ MJCSBSZ"Λ௥Ճ 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ʢಠࣗमਖ਼͋Γʣ ૬ରύεͰͷSFRVJSF ઈରύεͰͷSFRVJSF

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ൃੜ͍ͯͨ͠໰୊ͷ۩ମྫ ΤϯτϦ ϙΠϯτ JODMVEF@QBUIʹ MJCSBSZ#Λ௥Ճ MJCSBSZ# MJCSBSZ" 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ࣗ࡞Ϋϥε ΤϯτϦ ϙΠϯτ 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ʢಠࣗमਖ਼͋Γʣ ಉ͡1&"3ύοέʔδʢʹΫϥεʣͰΫ ϥεೋॏఆٛʹΑΓ'BUBM&SSPS ࣮͸ಉ͡1&"3ύοέʔδʢʹΫϥεʣ ͰɺΫϥεೋॏఆٛʹΑΓ'BUBM&SSPS JODMVEF@QBUIʹΑͬͯ ͳΜ͔ಈ͖ํ͕ҧ͏ ૬ରύεͰͷSFRVJSF ઈରύεͰͷSFRVJSF

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͜ͷ࡞Γͷ໰୊఺ w 1&"3͸JODMVEF@QBUIʹґଘͨ͠ϥΠϒϥϦ w 1&"3ʹґଘ͍ͯ͠ΔΫϥε΋JODMVEF@QBUIʹґଘͯ͠͠·͏ w JODMVEF@QBUIͰಈ͖͕มΘΔͷ͕ͦͷΫϥεͷਖ਼ͱͳͬͯ͠·ͬͯ΋͏ς ετͰ͖ͳ͍ w ϑΝΠϧύε͕ҧ͏͔ΒSFRVJSF@PODFͰΫϥεೋॏఆٛΛ๷͛ͳ͍ w ্هͷಈ͖͕ݏͩͬͨΒɺࠓޙࣗ࡞ΫϥεΛ࡞ΔࡍɺMJCSBSZ" # $ʹಉ͡Ϋ ϥεΛ࡞Βͳ͍ͱ͍͚ͳ͍

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վળ͢Δͧʂʂ̍

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઒ౡܛ(.01&1"#0JOD :"1$"4*")"$)*0+* ೥Λ௒͑ΔϨΨγʔ8FCαʔϏε ͷॏෳϥΠϒϥϦΛ࡟আͯ͠ίʔυ ྔΛʹͨ͠࿩

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վળํ๏Λߟ͑Δ

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ͦ΋ͦ΋Կ͕͍͚ͳ͍ͷ͔ʁ

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1&"3͕͋ͪͪ͜ʹόϥ͚͍ͯΔͷ͕ ͓͔͍͠

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֎෦ϥΠϒϥϦ͸ ύοέʔδ؅ཧπʔϧͰ؅ཧ͞Εɺ ҰՕॴʹूΊΒΕ͍ͯΔ΂͖

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΍Γ͍ͨ͜ͱ wՄೳͳݶΓҰݩԽͯ͠ॏෳΛݮΒ͢ w1&"3ύοέʔδΛ؅ཧͰ͖͍ͯΔঢ়ଶʹ͢Δ wQFBSίϚϯυΛ࢖Θͳ͍ʢʹΞϓϦͱΠϯϑϥΛಠཱʣ DPNQPTFSԽͩʂ

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ղܾํ਑ ࢖ΘΕͯͳ͍ύοέʔδΛ࡟আ͢Δ શͯͷ1&"3ύοέʔδͷਖ਼ମΛ໌Β͔ʹ͢Δ Ҡߦ͢ΔύοέʔδͷϦετΛ࡞੒͢Δ DPNQPTFSΛಋೖ͢Δ DPNQPTFS΁ύοέʔδΛҠߦ

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࢖ΘΕ͍ͯͳ͍ύοέʔδΛ࡟আ͢Δ

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࢖ΘΕ͍ͯͳ͍ύοέʔδΛ࡟আ͢Δ w1&"3ύοέʔδ͸શମͰݸɺॏෳ࡟আ͢Δͱछஔ͔Ε͍ͯΔ w͕͢͞ʹݸશ෦࢖ͬͯΔͳΜͯͳ͍Ͱ͠ΐ͏ɾɾɾ w࢖ΘΕ͍ͯͳ͍ͷΛҰൃͰ஌Δํ๏͸ͳ͍͕ɺ࢖ΘΕ͍ͯΔ΋ͷͳΒ1)1ϓϩ ηεࣗ਎͕஌͍ͬͯΔ͸ͣ

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1)1ϓϩηε͔Β࢖͍ͬͯΔϑΝΠϧΛฉ͖ग़͢ wHFU@JODMVEFE@pMFT Λ࢖͏ͱSFRVJSF͞ΕͨϑΝΠϧ͕BSSBZͰೖखͰ͖Δ wSFRVJSF͞ΕͨϑΝΠϧΛͻͨ͢Βϩά࠾ू͢Ε͹ɺ࢖ΘΕ͍ͯͳ͍ύοέʔ δ͕෼͔Δ͸ͣ array(3) { [0]=> string(35) “/path/to/app/get_included_files.php” [1]=> string(21) “/path/to/app/hoge.php” [2]=> string(21) “/path/to/app/fuga.php” }

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ϩά࠾ूํ๏Λߟ͑Δ wSFRVJSF͞ΕͨશͯͷϑΝΠϧΛग़ͯ͠ཉ͍͠ͷͰɺ1)1ϓϩηεऴྃ࣌ʹϩ άग़ྗ͍ͨ͠ wBVUP@QSFQFOE@pMFͱSFHJTUFS@TIVUEPXO@GVODUJPO ͷ߹ΘٕͤΛ࠾༻ wBVUP@QSFQFOE@pMF͸ඞͣ࠷ॳʹSFRVJSF͢ΔϑΝΠϧΛࢦఆ͢ΔQIQJOJͷ σΟϨΫςΟϒ wSFHJTUFS@TIVUEPXO@GVODUJPO ͸1)1ϓϩηεऴྃ࣌ͷॲཧΛొ࿥͢Δ GVODUJPO

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࢖ΘΕ͍ͯͳ͍ύοέʔδ͕൑໌ͨ͠ w̍ϲ݄ϩά࠾ूΛଓ͚ͯɺ࢖ΘΕ͍ͯͳ͍ύοέʔδ͕෼͔ͬͨ wݸͷύοέʔδΛ࡟আ

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1&"3ύοέʔδͷਖ਼ମΛ໌Β͔ʹ͢Δ

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શͯͷ1&"3ύοέʔδͷਖ਼ମΛ໌Β͔ʹ͢Δ wQFBSίϚϯυͷ؅ཧΛ཭Εͨύοέʔδ͸໊લ΋όʔδϣϯ΋෼͔Βͳ͍ w1&"3ͷαΠτ͔ΒҰ௨ΓύοέʔδΛམͱ͖ͯͯ͠ɺͻͨ͢ΒEJ⒎ΛऔΓଓ ͚ͯਖ਼ମΛ͖ͭͱΊΔ wίʔυ΍σΟϨΫτϦߏ੒·Ͱ͍͡ΒΕ͍ͯΔ΋ͷ΋͋Δ wਓؒͷ໨ͰݟΔ͔͠ͳ͍ wۜͷ஄ؙ͸ແ͍ɾɾɾ ʹؤுΔ

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ؤுͬͨ݁Ռ wΘΓͱग़དྷͨ w͍͍ͩͨಉ࣌͡ʹೖΕΒΕ͍ͯΔͷͰɺϦϦʔε೔͔ΒόʔδϣϯΛ༧૝Ͱ͖ ͨ w޾ӡʹ΋ಠࣗमਖ਼ͷ͍ͤͰόʔδϣϯͷ൑ผʹࠔΔ͜ͱ͸গͳ͔ͬͨ w1&"3͸όʔδϣϯ্͕͕Δͱ݁ߏίʔυ͕มΘΔͷͰɺͦΕ΄Ͳ൑அʹࠔ Βͳ͔ͬͨ w̍࣌ؒͷ࡞ۀ̏िؒ͘Β͍Ͱ׬ྃͨ͠

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3&"%.&Λஔ͍ͯύοέʔδ͕෼͔ΔΑ͏ʹͨ͠

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Ҡߦ͢ΔύοέʔδͷϦετΛ࡞੒͢Δ

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Ҡߦ͢ΔύοέʔδͷϦετΛ࡞੒͢Δ wશମͰόʔδϣϯ൪߸͕ಉ͡ύοέʔδΛ·ͱΊΔ wόʔδϣϯ൪߸͕όϥόϥͷ΋ͷ͸༏ઌॱҐΛ͚ͭΔ wQFBSίϚϯυͰΠϯετʔϧ͞Ε͍ͯͨ΋ͷ͸࠷༏ઌ w࣍ʹΫϥεΛू໿͠Α͏ͱ͍ͯͨ͠MJCSBSZ" wಠࣗमਖ਼΋ͨͩͷ֦ுʢϝιου௥ՃɺܧঝΫϥε௥ՃʣͰ͋Ε͹ࣗ෼ͨͪͰ ϗετ͢Δ w֦ுલͱಉ͡࢖͍ํ΋Ͱ͖Δ͸͔ͣͩΒ

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ҰݩԽύοέʔδͷϦετ͕ग़དྷͨ wݸɺछͷύοέʔδ͕DPNQPTFS΁ૹΕΔͧʂ

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DPNQPTFSΛಋೖ͢Δ

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DPNQPTFSΛಋೖ͢Δ wDPNQPTFS͕ೖͬͯͳ͍ͷͰɺ৽͘͠ೖΕΔ wҠߦ͢ΔύοέʔδΛԿ΋ߟ͑ͣʹϦϙδτϦ͔Β࡟আ͍ͨ͠ͷͰɺͲ͔͜Β Ͱ΋DPNQPTFS͔ΒಡΈࠐΊΔঢ়ଶʹ͍ͨ͠ wDPNQPTFS͸BVUPMPBEQIQΛSFRVJSFͯ͠ॳΊͯಡΈࠐΊΔ ʹશͯͷΤϯτϦϙΠϯτͰBVUPMPBEQIQΛSFRVJSF͢Δ

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SFRVJSF࣌ͷ໰୊ JODMVEF@QBUIʹϥΠϒ ϥϦஔ͖৔#Λ௥Ճ ૬ରύεͰͷSFRVJSF ઈରύεͰͷSFRVJSF MJCSBSZ# MJCSBSZ" 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ࣗ࡞Ϋϥε 1&"3ύοέʔδ 1&"3ύοέʔδ 1&"3ύοέʔδ ʢಠࣗमਖ਼͋Γʣ ΤϯτϦϙΠϯτͬͯͲ͜ʁ ΤϯτϦ ϙΠϯτ ΤϯτϦ ϙΠϯτ

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ΤϯτϦϙΠϯτ͕Ͳ͔͜෼͔Βͳ͍ w௕͍ྺ࢙ͷதͰશͯͷΤϯτϦϙΠϯτ͕೺ѲͰ͖ͳ͘ͳ͍ͬͯΔ wΞΫηεϩάΛͻͨ͢ΒಡΜͰಛఆ͢Δͷ͸ͭΒ͍ w͔ͩΒͱ͍ͬͯBVUP@QSFQFOE@pMF͸࢖͍ͨ͘ͳ͍ wQIQJOJΛݟͳ͍ͱڍಈ͕෼͔Βͳ͍ίʔυ͸/( w1)1ϓϩηε͞ΜɺΤϯτϦϙΠϯτͬͯͲ͔͜஌Γ·ͤΜ͔ɾɾɾʁ

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஌ͬͯͨ @4&37&3

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ΤϯτϦϙΠϯτΛ୳ͦ͏ w@4&37&3ʹ͸ݱࡏͷεΫϦϓτͷύε͕ೖ͍ͬͯΔʢʹ ࠷ॳʹ࣮ߦ͞Εͨ1)1ϑΝΠϧʣ wΫʔϩϯ͔Βͷ࣮ߦ΍ɺ$-*͔Βͷ࣮ߦͰ΋औಘՄೳ w͜ΕΛͻͨ͢ΒϩάऩूΛଓ͚Ε͹ɺ͍ͣΕશͯͷΤϯτϦϙΠϯτ͕෼͔Δ wϩάऩूํ๏͸ɺ࢖ΘΕ͍ͯͳ͍ύοέʔδΛ୳ͨ࣌͠ͱಉ͡ํ๏

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ΤϯτϦϙΠϯτ͕෼͔ͬͨ wݸ͋ͬͨ wΤϯτϦϙΠϯτશͯͰBVUPMPBEQIQΛSFRVJSFͨ͠ wίʔυશମͰDPNQPTFS͔ΒύοέʔδΛಡΈࠐΊΔΑ͏ʹͳͬͨ wԿ΋ߟ͑ͣʹDPNQPTFS΁ૹΔύοέʔδΛ࡟আͰ͖Δʂʂ

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DPNQPTFS΁ύοέʔδΛҠߦ

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DPNQPTFS΁ύοέʔδΛҠߦ wDPNQPTFSͰೖΕͨύοέʔδ΁JODMVEF@QBUIΛ௨͢ w௨͠ํӠʑ͸DPNQPTFSࣗମͷ࿩ʹͳΔͷͰɺৄࡉ͸ׂѪ wDPNQPTFS΁ҠߦͰ͖ͳ͔ͬͨύοέʔδ΋͋ΔͷͰɺJODMVEF@QBUIͷ༏ઌॱ ҐΛௐ੔͢Δඞཁ͕͋Δ wҠߦͰ͖ͳ͔ͬͨύοέʔδ͸DPNQPTFSΑΓ༏ઌͯ͠ಡΈࠐΈ͍ͨ

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MJCSBSZ# JODMVEF@QBUIΛௐ੔͢Δ )551 QBUIUPQIQMJC )551@)FBEFS )551@3FRVFTU JODMVEF@QBUI༏ઌॱҐ ߴ ௿ )551@3FRVFTU ಠ֦ࣗு DPNQPTFS΁ Ҡߦ͢Δ ύοέʔδ ҠߦෆՄ ύοέʔδ %# ಠࣗमਖ਼

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MJCSBSZ# JODMVEF@QBUIΛௐ੔͢Δ )551 QBUIUPQIQMJC )551@)FBEFS )551@3FRVFTU JODMVEF@QBUI༏ઌॱҐ ߴ ௿ )551@3FRVFTU ಠ֦ࣗு DPNQPTFS΁ Ҡߦ͢Δ ύοέʔδ ҠߦෆՄ ύοέʔδ DPNQPTFS )551 )551@)FBEFS )551@3FRVFTU ಠ֦ࣗு %# %# ಠࣗमਖ਼

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MJCSBSZ# JODMVEF@QBUIΛௐ੔͢Δ JODMVEF@QBUI༏ઌॱҐ ߴ ௿ DPNQPTFS΁ Ҡߦ͢Δ ύοέʔδ ҠߦෆՄ ύοέʔδ DPNQPTFS )551 )551@)FBEFS )551@3FRVFTU ಠ֦ࣗு %# %# ಠࣗमਖ਼

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طଘͷύοέʔδΛ࡟আͯ͠ɺ Ҡߦ׬ྃʂ

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݁Ռͱ·ͱΊ

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݁Ռ wݸͷύοέʔδͷ಺ɺݸͷύοέʔδΛ࡟আͰ͖ͨ wίʔυߦ਺͸ ߦ͔Β ߦ΁ʢສߦ࡟আʣ w·ͩݸɺछͷύοέʔδ͕࢒͍ͬͯΔɾɾɾ

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·ͱΊ wॏෳ͞Εͨ1&"3ύοέʔδΛ࡟আͯ͠ίʔυͷݟ௨͕͠ͱͯ΋ྑ͘ͳͬͨ wΫϥεͷೋॏఆٛ΍ɺJODMVEF@QBUIͰಈ͖͕มΘΔ͜ͱ΁ͷෆ͕҆গͳ͘ͳͬ ͨ wࣗ࡞ΫϥεΛMJCSBSZ" # $ʹྔ࢈͢Δඞཁ͕গͳ͘ͳͬͨʢ͸ͣʣ wΞϓϦͱΠϯϑϥ͕੾Γ཭͞ΕͯɺϦϙδτϦΛݟΔ͚ͩͰશମΛ೺ѲͰ͖Δ Α͏ʹͳͬͨ w·ͩݸɺछͷύοέʔδ͕࢒͍ͬͯΔͷͰɺߴ͍όʔδϣϯʹ·ͱΊΔ ܗͰͳΜͱ͔͍ͨ͠

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ॴײ wϨΨγʔ1)1͸ΞϓϦέʔγϣϯͷղੳ͕ͨͼͨͼٻΊΒΕΔ͚Ͳɺίʔυಡ ΜͰ΋ͳ͔ͳ͔೺ѲͰ͖ͳ͍ wίʔυϨϕϧͷղੳ͸͖͍͕ͭɺϑΝΠϧϨϕϧͳΒΘΓͱ1)1ϓϩηε͔Β ৘ใΛऔΕͯ໾ʹཱͭ wFYSFRVJSFͨ͠ϑΝΠϧɺΤϯτϦϙΠϯτ wϩάͷग़ྗํ๏͸BVUP@QSFQFOE@pMFͱSFHJTUFS@TIVUEPXO@GVODUJPO ͷ߹ Θٕ͕ͤΦεεϝ