Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/github.com/jessevdk/go-flags/optstyle_windows.go b/vendor/github.com/jessevdk/go-flags/optstyle_windows.go
new file mode 100644
index 0000000..f3f28ae
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/optstyle_windows.go
@@ -0,0 +1,108 @@
+// +build !forceposix
+
+package flags
+
+import (
+ "strings"
+)
+
+// Windows uses a front slash for both short and long options. Also it uses
+// a colon for name/argument delimter.
+const (
+ defaultShortOptDelimiter = '/'
+ defaultLongOptDelimiter = "/"
+ defaultNameArgDelimiter = ':'
+)
+
+func argumentStartsOption(arg string) bool {
+ return len(arg) > 0 && (arg[0] == '-' || arg[0] == '/')
+}
+
+func argumentIsOption(arg string) bool {
+ // Windows-style options allow front slash for the option
+ // delimiter.
+ if len(arg) > 1 && arg[0] == '/' {
+ return true
+ }
+
+ if len(arg) > 1 && arg[0] == '-' && arg[1] != '-' {
+ return true
+ }
+
+ if len(arg) > 2 && arg[0] == '-' && arg[1] == '-' && arg[2] != '-' {
+ return true
+ }
+
+ return false
+}
+
+// stripOptionPrefix returns the option without the prefix and whether or
+// not the option is a long option or not.
+func stripOptionPrefix(optname string) (prefix string, name string, islong bool) {
+ // Determine if the argument is a long option or not. Windows
+ // typically supports both long and short options with a single
+ // front slash as the option delimiter, so handle this situation
+ // nicely.
+ possplit := 0
+
+ if strings.HasPrefix(optname, "--") {
+ possplit = 2
+ islong = true
+ } else if strings.HasPrefix(optname, "-") {
+ possplit = 1
+ islong = false
+ } else if strings.HasPrefix(optname, "/") {
+ possplit = 1
+ islong = len(optname) > 2
+ }
+
+ return optname[:possplit], optname[possplit:], islong
+}
+
+// splitOption attempts to split the passed option into a name and an argument.
+// When there is no argument specified, nil will be returned for it.
+func splitOption(prefix string, option string, islong bool) (string, string, *string) {
+ if len(option) == 0 {
+ return option, "", nil
+ }
+
+ // Windows typically uses a colon for the option name and argument
+ // delimiter while POSIX typically uses an equals. Support both styles,
+ // but don't allow the two to be mixed. That is to say /foo:bar and
+ // --foo=bar are acceptable, but /foo=bar and --foo:bar are not.
+ var pos int
+ var sp string
+
+ if prefix == "/" {
+ sp = ":"
+ pos = strings.Index(option, sp)
+ } else if len(prefix) > 0 {
+ sp = "="
+ pos = strings.Index(option, sp)
+ }
+
+ if (islong && pos >= 0) || (!islong && pos == 1) {
+ rest := option[pos+1:]
+ return option[:pos], sp, &rest
+ }
+
+ return option, "", nil
+}
+
+// addHelpGroup adds a new group that contains default help parameters.
+func (c *Command) addHelpGroup(showHelp func() error) *Group {
+ // Windows CLI applications typically use /? for help, so make both
+ // that available as well as the POSIX style h and help.
+ var help struct {
+ ShowHelpWindows func() error `short:"?" description:"Show this help message"`
+ ShowHelpPosix func() error `short:"h" long:"help" description:"Show this help message"`
+ }
+
+ help.ShowHelpWindows = showHelp
+ help.ShowHelpPosix = showHelp
+
+ ret, _ := c.AddGroup("Help Options", "", &help)
+ ret.isBuiltinHelp = true
+
+ return ret
+}