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静的解析の話
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gaopin
November 20, 2017
Technology
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静的解析の話
Swift愛好会 Vol.24
gaopin
November 20, 2017
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Transcript
੩తղੳͷ͓ @gaopin1534
ࣗݾհ • ߴদฏ(gaopin1534) • ਓࡐܥاۀۈ • iOSྺ1ڧ • ͱPHPͱ͔Rubyͱ͔ͱྑ͠ •
githubͱ͔twitter→@gaopin1534
੩తղੳʁ
੩తղੳͬͯͳ͋ʹʁ • ίʔυΛ࣮ߦͤͣʹߦ͏ݕূ • Lintͱ͔ • ఆྔతʹίʔυͷ࣭ΛଌΔ͜ͱ͕Ͱ͖Δ
Why ੩తղੳʁ
ࣄͷى͜Γࠓ಄
ԶࢯผϓϩμΫτʹδϣΠϯ
ർฐͨ͠ίʔυϕʔε by fltmech98
ੵΈ্͕ΔObj-Cͷࢁ by Kristina D.C. Hoeppner
ԶSwift͕ॻ͖͍ͨ
͜ͷίʔυ͍͔ΜͰ͢ 4XJGUͰॻ͖͑·͠ΐ ࣌4XJGUͩΑ4XJGU #044 ͔͚ۚͯ·ͰΔඞཁ͋Γ·ͯ͠ʁ Մಡੑ͕ͻͲ͍ όά͕༙͖·͢Α͜Ε #044 ແअؾͳײͰۚಈ͔ΜͷͩΑ
https://goo.gl/HSLSZn
ͳΒఆྔతͳΤϏσϯεΛ Ϊϟβʔ͢Εྑ͍ΜͰ͠ΐʁ
※swiftͷެࣜplugin༗ྉ(OSS൛༗ΔΒ͍͚͠Ͳͬͨ͜ͱແ͍)
॥తෳࡶ Cyclomatic Complexity
M=E-N+2P M = ॥తෳࡶ E = άϥϑͷΤοδ N = άϥϑͷϊʔυ
P = ࿈݁͞Εͨίϯϙʔωϯτͷ
॥తෳࡶ • ifจforจ͕ແ͍ίʔυͰ1 • ϑϩʔάϥϑ্औΓ͏Δܦ࿏ͷԼݶ • શͳذཏΛୡ͢ΔͨΊʹඞཁͳς ετέʔεͷͷ্ݶ • ߴ͍΄Ͳڽूੑ͕͍ͱߟ͑ΒΕΔ
͜Μͳͱ͖ʁ ϝιουฏۉ͍͍ײ͡ͳͷʹΫϥεฏۉ͕ߴ͍ → Ϋϥεͷׂ͕దͰͳ͍ ϝιουฏۉͷ࣌Ͱ͢Ͱʹѱ͍ → ϝιουͷ໊͚ɺΛݟ͖͢Ͱʁ ϝιουฏۉ͍͍ײ͡ͳͷʹϑΝΠϧฏۉ͕ߴ͍ → ϑΝΠϧ͚ͳͲΛݟ͔͢ɺ͋Δఔڐ༰
॥తෳࡶ ෳࡶ͞ͷঢ়ଶ όάࠞೖ ҎԼ ඇৗʹྑ͍ߏ Ҏ্ ߏతͳϦεΫ͋Γ Ҏ্
ςετෆՄೳ Ҏ্ ͍͔ͳΔมߋޡ मਖ਼ΛੜΉ http://szk-takanori.hatenablog.com/entry/20111219/p1
ίʔυͷष͍ Code Smell
ίʔυͷष͍ • ͍ΘΏΔʮष͏ʯՕॴͷ • Ұൠతʹʮष͏ʯͱݴΘΕΔύλʔϯ͕ݱΕ ͍ͯΔՕॴΛूܭͯ͘͠ΕΔ • ࢀߟఔʹ͢Δͷ͕ྑ͍͔ͳʔͱ
ॏෳ Duplications
ॏෳ • ίʔυͰॏෳ͍ͯ͠Δߦͷׂ߹ • વɺมߋ࣌ʹҙਤͤ͵Өڹ͕ݱΕΔ֬ʹ ؔͯ͘͠Δ • 0%ʹ͢Δ͜ͱෆՄೳͳͷͰɺҰఆҎԼΛ ࢦ͢ͱྑ͍
ͦͷଞ • Reliablity Rating • ϧʔϧΛͪΌΜͱܾΊͳ͚Εɺࢦ͍ͨ࢟͠ʹܴ͑ͳ͍ɻಋೖίετ͕ߴ ͍ҹ • LOC •
ίʔυྔɻίʔυྔͱόά૬͕ؔ͋ΔͷͰɺଟগؾʹ͢Δͷ٢ɻͨͩɺ ϓϩμΫτͷεέʔϧͱίʔυͷεέʔϧΛൺֱɺѲ͢Δ΄͏͕େࣄ͔ͳͱ • ίϝϯτൺ • ίϝϯτӡ༻ͷϧʔϧ͕͋ΔͳΒ͏ʁతʹ͋·Γ͍Βͳ͍ͱࢥͬͯ·͢ɻ
ͨͩ͠
ղੳ͋͘·Ͱ҆
૬ରతͳӡ༻
ఆੑͱͷֻ͚߹Θͤ
੩తղੳͯ͠ ͰԥΕ͓K
Fin.