Imports github.com/Masterminds/vcs github.com/armon/go-radix github.com/Masterminds/semver Standard library imports bytes fmt go/build io io/ioutil log math/rand net/http net/url os os/exec path path/filepath regexp runtime sort strconv strings sync sync/atomic syscall time unicode go/parser go/scanner encoding/xml crypto/sha256 container/heap go/token os/signal text/tabwriter