goversion: rewrite on top of cmd/go/internal/version

README.md

@@ -16,10 +16,10 @@ Goversion scans inside of tar or gzipped tar archives that it finds (named
 The `-crypto` flag causes goversion to print additional information about the
 crypto libraries linked into each executable.
 
-The -m flag causes goversion to print the list of modules
+The `-m` flag causes goversion to print the list of modules
 found in the executable, along with version information.
 
-The -mh flag causes goversion to print the list of modules
+The `-mh` flag causes goversion to print the list of modules
 found in the executable, along with version and hash information.
 
 The `-v` flag causes goversion to print information about every file it

go.mod

@@ -0,0 +1,3 @@
+module rsc.io/goversion
+
+go 1.14

main.go

@@ -71,10 +71,6 @@ var (
 	verbose = flag.Bool("v", false, "print verbose information")
 )
 
-func init() {
-	flag.BoolVar(&version.DebugMatch, "d", version.DebugMatch, "print debug information")
-}
-
 func usage() {
 	fmt.Fprintf(os.Stderr, "usage: goversion [-crypto] [-v] path...\n")
 	flag.PrintDefaults()