info, err := fsys.Stat(base.ShortPath(absArg))
		if err != nil {
			// Errors raised from os.Stat are formatted to be more user-friendly.
			if os.IsNotExist(err) {
				err = fmt.Errorf("directory %v does not exist", base.ShortPath(absArg))
			}
			sw.Error(err)
			continue
		} else if !info.IsDir() {
			sw.Error(fmt.Errorf("%s is not a directory", base.ShortPath(absArg)))
			continue
		}

// Cwd returns the current working directory at the time of the first call.
func Cwd() string {
	cwdOnce.Do(func() {
		cwd = UncachedCwd()
	})
	return cwd
}

// ShortPath returns an absolute or relative name for path, whatever is shorter.
func ShortPath(path string) string {
	if rel, err := filepath.Rel(Cwd(), path); err == nil && len(rel) < len(path) {
		return rel
	}
	return path
}

				} else {
					vendErrorf(r.Old, "is replaced in %s, but not marked as replaced in vendor/modules.txt", base.ShortPath(replacementSource))
				}
			} else if vr != rNewCanonical {
				vendErrorf(r.Old, "is replaced by %s in %s, but marked as replaced by %s in vendor/modules.txt", describe(rNew), base.ShortPath(replacementSource), describe(vr))
			}
		}
	}
	for _, modFile := range modFiles {
		checkReplace(modFile.Replace)

	"regexp"
	goruntime "runtime"
	"runtime/debug"
	"strconv"
	"strings"
)

// GetNameFromCallsite walks back through the call stack until we find a caller from outside of the ignoredPackages
// it returns back a shortpath/filename:line to aid in identification of this reflector when it starts logging
func GetNameFromCallsite(ignoredPackages ...string) string {
	name := "????"
	const maxStack = 10
	for i := 1; i < maxStack; i++ {

		explain = "; GOTOOLCHAIN=" + Startup.GOTOOLCHAIN
	}
	if Startup.AutoFile != "" && (Startup.AutoGoVersion != "" || Startup.AutoToolchain != "") {
		explain += fmt.Sprintf("; %s sets ", base.ShortPath(Startup.AutoFile))
		if Startup.AutoToolchain != "" {
			explain += "toolchain " + Startup.AutoToolchain
		} else {
			explain += "go " + Startup.AutoGoVersion
		}
	}