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moby--moby/integration-cli/registry/requirement.go

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package registry
import "os/exec"
// Hosting returns wether the host can host a registry (v2) or not
func Hosting() bool {
// for now registry binary is built only if we're running inside
// container through `make test`. Figure that out by testing if
// registry binary is in PATH.
_, err := exec.LookPath(v2binary)
return err == nil
}