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checkexport

checkexport is a tool to make sure that all the stuff you export is actually used somewhere else.

You run it against a particular package, and within a scope. By default, the repo root of the targeted package is used.

Install

go get github.com/twitchtv/checkexport

Examples

Check whether exported values in github.com/golang/dep/internal/gps are used anywhere else in github.com/golang/dep:

$ checkexport -scope=github.com/golang/dep/... github.com/golang/dep/internal/gps
/Users/snelson/go/src/github.com/golang/dep/internal/gps/lock.go:31:6: func LocksAreEq is exported but not used anywhere else in github.com/golang/dep/...
/Users/snelson/go/src/github.com/golang/dep/internal/gps/lock.go:78:6: type SimpleLock is exported but not used anywhere else in github.com/golang/dep/...
/Users/snelson/go/src/github.com/golang/dep/internal/gps/lock.go:153:25: method LockedProject.Eq is exported but not used anywhere else in github.com/golang/dep/...
/Users/snelson/go/src/github.com/golang/dep/internal/gps/manifest.go:46:2: method RootManifest.IgnoredPackages is exported but not used anywhere else in github.com/golang/dep/...

Check across repositories, even across everything in your $GOPATH:

# This can take a very long time if you have a lot of packages - a more targeted
# search is better!
$ checkexport -scope="..." github.com/spenczar/tdigest

If -scope is unset, it will try to deduce the root of a package's repo and use that.