make and learn minimum golint

Transcript

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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