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Go Linter - Staticcheckを使ってみる

Last updated at Posted at 2021-12-06

この記事はWanoグループ Advent Calendar 2021 5日目の記事になります

Goには様々なlinterが存在しています。
元々Go公式のlinterはGolintですが、色々否定的な意見は少なく、今年ついにアーカイブされました。

代わりに使用するlinterとして GoやGoogleがサポートするStaticcheckが使ってみようかなと思います。

公式page (前身はGoSimple)

Install

go 1.17なら、以下のcmdで実行 (過去versionの場合、go installじゃなくgo get使うかも)

$ go install honnef.co/go/tools/cmd/staticcheck@latest

実行

早速使ってみる

$ staticcheck ./...

...(略)
xxxxxxxx.go:108:7: receiver name should be a reflection of its identity; don't use generic names such as "this" or "self" (ST1006)
xxxxxx:21:10: should use fmt.Errorf(...) instead of errors.New(fmt.Sprintf(...)) (S1028)
xxxxxx:21:21: the argument is already a string, there's no need to use fmt.Sprintf (S1025)
...(略)

後ろ付いてるの番号はCheck番号、説明一覧はここで

staticcheck.confを追加すれば、特定の番号だけ検知も可能です

staticcheck.conf
checks = ["all", "-ST1000", "-ST1003", "-ST1016", "-ST1020", "-ST1021", "-ST1022", "-ST1023"]

他の細かい設定したいなら

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