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[cdignam-segment]

Fixes #165

[MichaelHindley]

Any chance of this being merged @alexandear @joho @gnarlex ? It's great for projects with many packages :)

[alexandear]

Could you change a little bit the method? map[string]struct{} is a common way for implementing set in Go:

Suggested change

	func stringSet(s []string) map[string]interface{} {
	m := make(map[string]interface{})
	for _, str := range s {
	m[str] = true
	}
	return m
	}
	func stringSet(s []string) map[string]struct{} {
	m := make(map[string]struct{}, len(s))
	for _, str := range s {
	m[str] = struct{}{}
	}
	return m
	}

[alexandear]

I'm not a maintainer of the repo. Sorry, can't merge.