使用带有errorf而不是sprintf的错误

Question

Im using gometalinter on my project and for this code

errors.New(fmt.Sprintf("%s cmd.Std error: %s ", cp[1:], err))

im getting error should replace errors.New(fmt.Sprintf(...)) with fmt.Errorf(...) (golint)

Any idea how to resolve this ?

I try with errors.New(fmt.Errorf("%s cmd.Std error: %s ", cp[1:], err)) and I got error cannot use fmtErrorf as type string

Answer 1

fmt.Errorf returns an error while errors.New takes a string that's why your code doesn't compile.

You can simply omit the errors.New call or, since you're using the github.com/pkg/errors package, you can use https://godoc.org/github.com/pkg/errors#Errorf.