Resolve the VCS repository URL for a Go import

resolveimport.go

package main

import (
	"flag"
	"fmt"
	"log"
	"os"

	"golang.org/x/tools/go/vcs"
)

func usage() {
	fmt.Printf("usage: resolveimport <import>\n\n")
	fmt.Printf("Resolves the download VCS repository URL for a Go import\n")
	os.Exit(1)
}

func main() {
	flag.Parse()
	if flag.NArg() != 1 {
		usage()
	}
	repoRoot, err := vcs.RepoRootForImportPath(flag.Arg(0), false)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(repoRoot.Repo)
}