gotest: make it easier to get the help string

Because gotest's args are mingled with the tests, it's
hard to get the usage message to print. This CL adds
explicit support for -help, spelled several different ways.
Gotest has special flags like -file that are somewhat
hidden otherwise.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5298052

diff --git a/src/cmd/gotest/flag.go b/src/cmd/gotest/flag.go
index f8c2061ec6859e87593d0248ae208b9cef979d7f..0df9e24f133c897529c8db29e03ac87c80d61d92 100644 (file)
--- a/src/cmd/gotest/flag.go
+++ b/src/cmd/gotest/flag.go
@@ -107,6 +107,10 @@ func flag(i int) (f *flagSpec, value string, extra bool) {
        if strings.HasPrefix(arg, "--") { // reduce two minuses to one
                arg = arg[1:]
        }
+       switch arg {
+       case "-?", "-h", "-help":
+               usage()
+       }
        if arg == "" || arg[0] != '-' {
                return
        }