Check that no globals are present in Go code.

Global variables are an input to functions that is not visible in the functions signature, complicate testing, reduces readability and increase the complexity of code.

https://peter.bourgon.org/blog/2017/06/09/theory-of-modern-go.html https://twitter.com/davecheney/status/871939730761547776

There are very few exceptions to the global variable rule. This tool will ignore the following patterns:

• Variables with an err or Err prefix that implement the error interface
• Variables named _
• Variables named version
• Variables assigned from regexp.MustCompile()
• Variables with a //go:embed comment

go install 4d63.com/gochecknoglobals@latest

The linter is built on Go's analysis package and does thus support all the built in flags and features from this type. The analyzer is executed by specifying packages.

gochecknoglobals [package]

gochecknoglobals ./...

By default, test files will not be checked but can be included by adding the -t flag.

gochecknoglobals -t [package]