make and learn minimum golint

by Masayuki Morita

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࡞ֶͬͯͿ ϛχϚϜgolint GoݴޠLTେձ 2017/06/05 @minamijoyo

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ࣗݾ঺հ • ৿ా ਅ೭ (Masayuki Morita) • Twitter/GitHub: @minamijoyo • CrowdWorks Inc. • Πϯϑϥ୲౰ • ͍͍ͩͨAWS/Terraform/Dockerͱ͔͍ͬͯ͡Δ

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Πϯϑϥ୲౰͕ࠓ͙͢ GoΛֶͿ΂͖3ͭͷཧ༝ 1. Go੡ϛυϧ΢ΣΞ΍CLIπʔϧ͕૿͖͑ͯͨɻ 2. bashεΫϦϓτͭΒ͍ɻGo͸ॻָ͍͍ͯͯ͠ɻ 3. Gopher͘Μ͕͔Θ͍͍ɻ The Go gopher was designed by Renée French.

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ࠓ೔ͷςʔϚ: ࠷ۙɺgolintͰ༡ΜͰΈͨ࿩

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golintͯ͠·͔͢ʁ

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golint • ެࣜͷLinter • GoͬΆ͘ͳ͍ίʔσΟϯάελΠϧΛࢦఠ $ go get -u github.com/golang/lint/golint

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$ golint main.go main.go:6:2: var instanceId should be instanceID

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Ͳ͏΍ͬͯ൑ఆͯ͠Δͷ͔ʁ

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ͨͩͷࣙॻͩͬͨ (※࣮ࡍʹ͸୯ޠͷ్தͷ΋ͷ΋ݕग़͍ͯ͠ΔͷͰগ͠ෳࡶʣ https://github.com/golang/lint/blob/master/lint.go

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͔͠͠ golintͷίʔυΛͨͩோΊͯͯ΋ ੩తղੳ͕ ॳ৺ऀʹΑ͘Θ͔ΒΜͷͰ͢

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ͦ͏ͩ golint࡞Ζ͏

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ϓϩάϥϛϯάֶशͷجຊ: ·ͶΔ

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࡞ֶͬͯͿ golint

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ϛχϚϜͳཁ݅ • ػೳɿಛఆͷม਺໊Λ୳͢ • ೖྗɿ1ϑΝΠϧͷΈҾ਺ͰϑΝΠϧ໊Λ౉͢ • ग़ྗɿϚονͨ͠ϑΝΠϧ໊:ߦ਺:ΧϥϜΛදࣔ

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80ߦ͙Β͍Ͱॻ͚ͨ

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←ඪ४ͷgoύοέʔδΛ࢖͏ ↓Ҿ਺ͰೖྗϑΝΠϧ໊Λ΋Β͏

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↓ϑΝΠϧΛύʔεͯ͠ASTΛऔಘ

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↑ࠨลͷࣝผࢠΛऔΓग़ͯ͠νΣοΫ ↑ASTΛ࠶ؼతʹ୳ࡧ ←ม਺୅ೖࣜΛ୳͢visitor

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↑ม਺໊ʹϚονͨ͠ΒҐஔΛग़ྗ ←୳͢ม਺໊ͷఆٛ

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ม਺wallyΛ୳ͤ

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wally + golint = wallint

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$ wallint data/wally.go data/wally.go:6:2: wally was found

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͔ͤͬ͘ͳͷͰ ΤσΟλʹ૊ΈࠐΜͰΈͨ

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ม਺wallyΛ୳ͤ

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ҰॠͰӅΕͨม਺wallyΛݕग़

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·ͱΊ • ϓϩάϥϛϯάͷجຊ͸·ͶΔ͜ͱ • ࡞ֶͬͯͿͱཧղ͕ਂ·Δ • આ໌ʹ࢖ͬͨίʔυˣ • https://github.com/minamijoyo/wallint