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Masayuki Morita
June 05, 2017
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20170605_make_and_learn_minimum_golint.pdf
Masayuki Morita
June 05, 2017
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Transcript
࡞ֶͬͯͿ ϛχϚϜgolint @minamijoyo 2017/06/05
ࣗݾհ • ా ਅ೭ (Masayuki Morita) • Twitter/GitHub: @minamijoyo •
CrowdWorks Inc. • Πϯϑϥ୲ • ͍͍ͩͨAWS/Terraform/Dockerͱ͔͍ͬͯ͡Δ
Πϯϑϥ୲͕ࠓ͙͢ GoΛֶͿ͖3ͭͷཧ༝ 1. GoϛυϧΣΞCLIπʔϧ͕૿͖͑ͯͨɻ 2. bashεΫϦϓτͭΒ͍ɻGoॻָ͍͍ͯͯ͠ɻ 3. Gopher͘Μ͕͔Θ͍͍ɻ The Go
gopher was designed by Renée French.
ࠓͷςʔϚ: ࠷ۙɺgolintͰ༡ΜͰΈͨ
golintͯ͠·͔͢ʁ
golint • ެࣜͷLinter • GoͬΆ͘ͳ͍ίʔσΟϯάελΠϧΛࢦఠ $ go get -u github.com/golang/lint/golint
$ golint main.go main.go:6:2: var instanceId should be instanceID
Ͳ͏ͬͯఆͯ͠Δͷ͔ʁ
ͨͩͷࣙॻͩͬͨ (※࣮ࡍʹ୯ޠͷ్தͷͷݕग़͍ͯ͠ΔͷͰগ͠ෳࡶʣ https://github.com/golang/lint/blob/master/lint.go
͔͠͠ golintͷίʔυΛͨͩோΊͯͯ ੩తղੳ͕ ॳ৺ऀʹΑ͘Θ͔ΒΜͷͰ͢
ͦ͏ͩ golint࡞Ζ͏
ϓϩάϥϛϯάֶशͷجຊ: ·ͶΔ
࡞ֶͬͯͿ golint
ϛχϚϜͳཁ݅ • ػೳɿಛఆͷม໊Λ୳͢ • ೖྗɿ1ϑΝΠϧͷΈҾͰϑΝΠϧ໊Λ͢ • ग़ྗɿϚονͨ͠ϑΝΠϧ໊:ߦ:ΧϥϜΛදࣔ
80ߦ͙Β͍Ͱॻ͚ͨ
←ඪ४ͷgoύοέʔδΛ͏ ↓ҾͰೖྗϑΝΠϧ໊ΛΒ͏
↓ϑΝΠϧΛύʔεͯ͠ASTΛऔಘ
↑ࠨลͷࣝผࢠΛऔΓग़ͯ͠νΣοΫ ↑ASTΛ࠶ؼతʹ୳ࡧ ←มೖࣜΛ୳͢visitor
↑ม໊ʹϚονͨ͠ΒҐஔΛग़ྗ ←୳͢ม໊ͷఆٛ
มwallyΛ୳ͤ
wally + golint = wallint
$ wallint data/wally.go data/wally.go:6:2: wally was found
͔ͤͬ͘ͳͷͰ ΤσΟλʹΈࠐΜͰΈͨ
มwallyΛ୳ͤ
ҰॠͰӅΕͨมwallyΛݕग़
·ͱΊ • ϓϩάϥϛϯάͷجຊ·ͶΔ͜ͱ • ࡞ֶͬͯͿͱཧղ͕ਂ·Δ • આ໌ʹͬͨίʔυˣ • https://github.com/minamijoyo/wallint