go-unusedの使い方メモ

よく忘れるのでgo-unusedの使い方メモっておきます.

インストール

$ go get -u honnef.co/go/unused/cmd/unused

使う

gorstを例にしてみます。

オーソドックスな例

$ unused github.com/hhatto/gorst/...
/YOUR_GOPATH/src/github.com/hhatto/gorst/cmd/gorst/main.go:13:5: var format is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:30:2: const parserIfaceVersion_18 is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:108:2: const numVAL is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:131:2: const ruleBlockQuoteRaw is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:294:2: const ruleLinkSource is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:307:2: const ruleUrlReference is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:314:2: const ruleEmptyTitle is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:324:2: const ruleEof is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:333:2: const ruleAlphanumericAscii is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:334:2: const ruleDigit is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:357:2: const ruleDoubleQuoteStart is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:358:2: const ruleDoubleQuoteEnd is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:12722:6: func print_tree is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/parser.leg.go:12745:5: var keynames is unused
/YOUR_GOPATH/src/github.com/hhatto/gorst/rst.go:34:2: const needParserIfaceVersion is unused

パブリックなメソッド等もチェックに含める.

-exportedオプションを指定します.

$ unused -exported github.com/hhatto/gorst/...

gorstでは特に-exportedをつけてもつけなくても結果に変化はありませんでした.

特定のパスだけチェック対象(外)にする.

$ unused $(go list github.com/hhatto/gorst/... | grep cmd)
/YOUR_GOPATH/src/github.com/hhatto/gorst/cmd/gorst/main.go:13:5: var format is unused

以上